WO2000028531A1 - Durch uv-bestrahlung härtbare bindemittelzusammensetzung für magnetische aufzeichnungsmedien und photoinitiatormischung - Google Patents
Durch uv-bestrahlung härtbare bindemittelzusammensetzung für magnetische aufzeichnungsmedien und photoinitiatormischung Download PDFInfo
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- WO2000028531A1 WO2000028531A1 PCT/EP1999/007554 EP9907554W WO0028531A1 WO 2000028531 A1 WO2000028531 A1 WO 2000028531A1 EP 9907554 W EP9907554 W EP 9907554W WO 0028531 A1 WO0028531 A1 WO 0028531A1
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- UFDHBDMSHIXOKF-UHFFFAOYSA-N tetrahydrophthalic acid Natural products OC(=O)C1=C(C(O)=O)CCCC1 UFDHBDMSHIXOKF-UHFFFAOYSA-N 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 150000005691 triesters Chemical class 0.000 description 1
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- KLNPWTHGTVSSEU-UHFFFAOYSA-N undecane-1,11-diamine Chemical compound NCCCCCCCCCCCN KLNPWTHGTVSSEU-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
- B29C65/483—Reactive adhesives, e.g. chemically curing adhesives
- B29C65/4845—Radiation curing adhesives, e.g. UV light curing adhesives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/671—Unsaturated compounds having only one group containing active hydrogen
- C08G18/672—Esters of acrylic or alkyl acrylic acid having only one group containing active hydrogen
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C09D175/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
- G11B5/7021—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/702—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent
- G11B5/7021—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate
- G11B5/7022—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the bonding agent containing a polyurethane or a polyisocyanate containing mixtures of polyurethanes or polyisocyanates with other polymers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/733—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer characterised by the addition of non-magnetic particles
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31551—Of polyamidoester [polyurethane, polyisocyanate, polycarbamate, etc.]
Definitions
- the present invention relates to a binder composition curable by UV radiation, a coating composition which contains such a binder composition, a photoinitiator mixture which is suitable for use in these coating compositions and a magnetic recording medium which contains such a coating composition which is curable by UV radiation.
- Magnetic recording media have been widely used for recording and reproducing sound and image information as well as data.
- the ever increasing demands placed on these media make continuous improvements in magnetic and electroacoustic aspects as well as with regard to an improvement in age resistance necessary.
- magnetic recording media should therefore have high mechanical stability and durability, preferably even under extreme operating conditions, such as at high temperature and high atmospheric humidity.
- the magnetic layers have to be very flexible, have a high elasticity and have a high tear resistance.
- the aforementioned requirements are met by the known two-layer magnetic recording media, which disperses the magnetic materials in an organic binder on a carrier material, generally a film, for. B. from linear polyesters, such as polyethylene terephthalate, generally not met at the same time. Many magnetic recording media therefore have multiple layers.
- intermediate or adhesive and back and cover layers can also be present. These serve e.g. B. the improvement of
- Adhesion of the magnetic layer the improvement of the mechanical properties of the tape and / or the prevention of electrostatic charging.
- Back layers should e.g. B. prevent the tape layers from sticking together, electrostatic charging and / or curling of the tape.
- Cover layers counteract the abrasion of the magnetic layer and thus the contamination of the recording and playback devices.
- Intermediate layers, in particular adhesive layers between the carrier material and the magnetic layer, are intended to increase the mechanical strength of the tape by improving the adhesion and to ensure the uniformity of the magnetic layer.
- a known problem with multilayer magnetic recording media, in particular magnetic tapes is electrostatic charging by friction and charge separation during rewinding and unwinding. It is also known to use carbon black dispersed in the magnetic recording media to avoid this electrostatic charge.
- the carbon black is therefore generally used in a layer on the rear side of the carrier or as a component of the adhesion promoter layer between the carrier material and the magnetic layer.
- the binders used for this adhesion promoter or primer layer must be sufficient
- thermoplastic resins as binders
- the magnetic coating material which is usually dispersed in a considerable amount of solvent
- the previously formed adhesive layer swells or is dissolved by the solvent, so that the coating becomes uneven and one does not become smooth Preserves surface of the magnetic layer.
- thermally or chemically curable resins there is the problem of a comparatively long curing time. They can therefore generally not be used in the continuous production processes for magnetic tapes which are customary today. Radiation curing processes have therefore become increasingly important in recent years. Radiation curing offers many advantages over chemical or thermal curing, such as saving raw materials, reduced environmental impact and energy savings, as solvent-free or low-solvent systems can be used, as well as a high curing speed and a low thermal load on the substrate.
- the radiation curing of the binders used for the adhesion promoter layer is generally carried out by means of electron beams.
- the disadvantage of this hardening process is the high space requirement, the high level of safety engineering and the high level of maintenance required for the ones used
- US Pat. No. 3,874,906 describes a process for coating various substrates, such as paper, metals, plastics and cellulose, using a radiation-curable composition which contains a polyester acrylate and N-vinylpyrrolidone as a viscosity-reducing additive.
- a radiation-curable composition which contains a polyester acrylate and N-vinylpyrrolidone as a viscosity-reducing additive.
- the use of these radiation-curable binders in pigment-containing coating compositions has not been described.
- US Pat. No. 4,129,709 describes radiation-curable coating compositions which contain a urethane acrylate oligomer, N-vinylpyrrolidone and an acrylic acid ester.
- pigments and carbon black are also mentioned in general.
- a pigment-containing coating agent especially not for a soot-containing coating agent that can be hardened by UV radiation.
- US-A-4,348,427 describes a method for coating various surfaces, e.g. B. wood, plastic, etc. with a radiation-curable coating agent.
- a radiation-curable coating agent contains at least one compound that is selected from epoxy acrylates, polyester acrylates and urethane acrylates and at least one N-vinyl amide of a carbon, sulfonic or phosphonic acid.
- These coating compositions can be crosslinked by UV radiation at a wavelength of 200 to 400 nm in the presence of a photoinitiator. Coating agents containing carbon black are not described in this document.
- EP-A-0 559 135 describes a radiation-curable formulation comprising: a) an oligomer selected from epoxy acrylates, polyester acrylates, polyurethane acrylates and
- N-vinylformamide and optionally a further mono-, di- or polyfunctional vinyl or acrylic monomer.
- formulations are said to be suitable for pigmented and unpigmented coatings.
- Suitable pigments and especially carbon black are not disclosed in this document.
- EP-A-0 632 111 has a disclosure content comparable to EP-A-0 559 135.
- EP-A-0 033 897 describes a process for the production of polyurethane elastomers which have ⁇ -ethylenically unsaturated double bonds and which are suitable for UV curing. These polyurethane elastomers can be used to manufacture molded articles, laminates, adhesives, coating materials and magnetic tapes. Mixtures of these polyurethane acrylates with further ⁇ , ⁇ -ethylenically unsaturated compounds, in particular N-vinylamides, N-vinyllactams and vinyl- and allyl-substituted heteroaromatic compounds are in this
- EP-A-0 169 524 describes a magnetic recording medium in which the magnetic material is dispersed in a polyurethane elastomer as a binder, the composition of which essentially corresponds to that described in EP-A-0 033 897.
- These magnetic recording media have no pigment or carbon black primer layer between the support and the magnetic layer. Carbon black is only mentioned in general as an additive to the magnetic layer; an exemplary embodiment with a magnetic layer containing carbon black is not described.
- the magnetic recording layer is cured by means of electron radiation. The description generally refers to a possibility of weakly polymerizing the coating with UV light, in which case a conventional photoinitiator is required. However, individual photoinitiators are not mentioned.
- Carrier material and at least one magnetic layer the binder of the magnetic layer being curable by electron beams. It consists of 60 to 100% by weight of a polyurethane acrylate polymer with unsaturated double bonds and 0 to 40% by weight of a further ⁇ , ⁇ -ethylenically unsaturated compound which is selected from acrylic ester monomers, prepolymers and / or N-vinyl monomers.
- the polyurethane acrylate has an average number of more than 2 and less than 4 acrylic ester groups per average molecule.
- Magnetic recording media which have an undercoat layer between the support and the magnetic layer are not mentioned.
- the use of the binders used for the magnetic layer for dispersing carbon black is also not mentioned.
- the use of UV light is only described for weakly polymerizing the coating, in which case a customary high-absorption photoinitiator is necessary.
- DE-A-34 28 943 describes a magnetic recording medium comprising a carrier, a primer coating on this carrier and a magnetic coating on the primer coating.
- This primer coating is obtained by dispersing carbon black in a radiation-curable coating material and curing the dispersion thus obtained by irradiation.
- the coating material consists essentially of at least two compounds, which are selected from:
- Coating materials which contain N-vinylamides, N-vinyllactams or vinyl- and allyl-substituted heteroaromatic compounds are not described.
- soot-containing coating material of the primer coating can be cured by UV radiation, a conventional sensitizer being able to be used, but in the exemplary embodiments the curing is carried out exclusively by electron radiation. Mixtures of photoinitiators are also not mentioned in this document.
- photoinitiators are known for curing coating compositions by means of UV radiation.
- An overview of various photoinitiators can be found, for example, in "Radiation Curing in Polymer Science and Technology", Volume 2, Photoinitiating Systems, Elsevier 1993. Suitable photoinitiator mixtures for curing soot-containing coating compositions are not described in this document.
- DE-A-40 25 386 describes photoinitiators of the acylphosphine oxide type and a process for curing free-radically polymerizable compositions, coatings and printing inks by UV radiation in the presence of these photoinitiators.
- the acylphosphine oxides can be combined with other photoinitiators such as ketals, benzophenones or thioxanthones.
- the curable compositions can be transparent or contain conventional organic or inorganic pigments.
- DE-A-42 40 964 describes arenebisphosphine oxides and photopolymerizable compositions which contain them as photoinitiators. Mixtures of arenebisphosphine oxides with other photoinitiators can also be used.
- EP-A-0 184 095 describes bisacylphosphine oxides and their use as photoinitiators in photopolymerizable compositions. Combinations of these bisacylphosphine oxides with other photoinitiators are only mentioned in very general terms.
- EP-A-0 413 657 describes mono- and diacylphosphine oxides and photopolymerizable compositions containing them. Mixtures with other photoinitiators, e.g. B. with benzophenone, acetophenone derivatives, benzoin ethers or benzil ketals.
- EP-A-0 495 751 describes bisacylphosphines and photopolymerizable compositions containing them. Mixtures with other photoinitiators or photosensitizers are also mentioned in very general terms.
- Photoinitiator mixtures which contain an acylphosphine oxide or sulfide, an .alpha.-splitter and an H-abstractor and their use in soot-containing coating compositions curable by UV radiation are not described in the aforementioned documents.
- DE-A-42 31 579 describes alkyl bisacylphosphine oxide photoinitiators and their use in photopolymerizable compositions. These compositions can be radiation-curable aqueous polymer dispersions, customary pigments and carbon black also being mentioned as additives.
- the bisacylphosphine oxides can also be used as mixtures with known photoinitiators such as benzophenone, acetophenone derivatives, benzoin ethers, benzil ketals, monoacylphosphine oxides, other bisacylphosphine oxides, peresters or titanocenes.
- photoinitiator mixtures of three or more components which contain at least one acylphosphine oxide or sulfide, an ⁇ -splitter and an H-abstractor.
- soot-containing coating compositions curable by UV radiation there is no embodiment for soot-containing coating compositions curable by UV radiation.
- EP-A-0 615 980 describes a process for curing ethylenically unsaturated polymerizable compounds in the presence of a bisacylphosphine oxide photoinitiator.
- the ethylenically unsaturated compounds can be used in the form of radiation-curable aqueous prepolymer dispersions, carbon black being generally also listed as an additive to these dispersions.
- Mixtures of the bisacylphosphine oxide photoinitiators with other photoinitiators such as benzophenone, acetophenone derivatives, benzoin alkyl ethers and benzil ketals are only mentioned in very general terms.
- Photoinitiator mixtures containing an acylphosphine oxide or sulfide, an ⁇ -splitter and an H-abstractor are not described. There is also no exemplary embodiment of a soot-containing coating agent curable by UV radiation.
- EP-A-0 446 175 describes photoinitiator mixtures
- Photoinitiator mixtures containing an acylphosphine oxide or sulfide, an ⁇ -splitter and an H-abstractor and their use in soot-containing, curable by UV radiation
- Coating agents are not described in the aforementioned documents.
- the present invention is based on the object of providing a new binder composition curable by UV radiation. This should preferably be suitable for use in pigment-containing, in particular soot-containing, coating compositions.
- the present invention is also based on the object of providing a photoinitiator mixture for use in pigment-containing, in particular carbon black-containing, coating compositions.
- the soot-containing coating compositions should also be curable by UV radiation and are particularly suitable as a primer layer in magnetic recording media.
- the first object is achieved by a binder composition containing curable by UV radiation
- Radiation-curable ⁇ , ⁇ -ethylenically unsaturated double bonds per molecule b) at least one compound with a molecular weight in the range from 254 to 1000 which has three ⁇ , ⁇ -ethylenically unsaturated double bonds per molecule which can be hardened by UV radiation,
- At least one ⁇ , ⁇ -ethylenically unsaturated compound which is selected from N-vinylamides, N-vinyl-lactams, vinyl- and allyl-substituted heteroaromatic compounds and mixtures thereof,
- e) optionally at least one ester of an ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid with an aliphatic or cycloaliphatic C-
- binder composition containing:
- ⁇ , ⁇ -ethylenically unsaturated compound d) which is selected from N-vinylamides, N-vinyllactams, vinyl- and allyl-substituted heteroaromatic compounds and Mixtures of these,
- the content of ⁇ , ⁇ -ethylenically unsaturated double bonds curable by UV radiation is preferably in a range from about 2.5 to 7.0 mol per 1,000 g of binder composition, preferably 4.0 to 6.0 mol per 1,000 g Binder composition.
- the average double bond functionality is preferably at most 1.8 per molecule, preferably at most 1.6 per molecule, based on components a) to e).
- the mean lere double bond functionality at least 0.3 per molecule, preferably at least 0.5 per molecule, based on components a) to e).
- the polyurethane acrylate a) preferably has a number average molecular weight in the range from about 10,000 to 80,000, preferably about 15,000 to 50,000.
- the polyurethane acrylate a) is preferably composed of
- At least one compound with at least two terminal isocyanate groups which is selected from diisocyanates, isocyanate prepolymers, polyisocyanates and mixtures thereof,
- E) optionally at least one compound different from A) to D) which has two or more active hydrogen atoms per molecule and which is selected from diols, amines with at least 2 primary and / or secondary amino groups per molecule, amino alcohols, triols, polyols, water and mixtures thereof.
- Preferred compounds A) with at least two terminal isocyanate groups are selected from compounds with 2 to 5 isocyanate groups, isocyanate prepolymers with an average number of 2 to 5 isocyanate groups, and mixtures thereof. These include organic di-, tri- and polyisocyanates.
- Suitable diisocyanates A) are e.g. B. tetramethylene diisocyanate, hexamethylene diisocyanate, 2,3,3-trimethylhexamethylene diisocyanate, 1,4-cyclohexylene diisocyanate, dicyclohexylmethane diisocyanate,
- a suitable triisocyanate A) is e.g. B. triphenylmethane-4,4 ', 4 "-triisocyanate.
- Isocyanate prepolymers with a number average molecular weight of up to about 10,000, preferably in a range from about 500 to 3,000, are also suitable.
- B. obtained by adding the aforementioned isocyanates to polyfunctional compounds containing hydroxyl or amino groups.
- Polyisocyanates based on tolylene diisocyanate, hexamethylene diisocyanate and / or isophorone diisocyanate are preferably used, which are formed by polyaddition to di- or triols or by biureth, urethdione or isocyanurate formation. Suitable diols and triols are described below as component E).
- reaction products of polyisocyanates with monofunctional compounds which are usually used to regulate the isocyanate group content such as. B. with at least one aliphatic, cycloaliphatic or aromatic monoalcohol, such as methanol, ethanol, n-propanol, isopropanol, n-butanol, t-butanol, cyclohexanol and phenol.
- These reaction products preferably also have at least one or two isocyanate groups per molecule.
- the reaction products of polyisocyanates with phthalimide or caprolactar are also suitable.
- the compounds of component A) can be used individually or as mixtures.
- Suitable compounds B) which have at least one ⁇ , ⁇ -ethylenically unsaturated double bond and at least two hydroxyl groups are, for. B. the reaction products of epoxy compounds, which have at least two epoxy groups, with ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids and their anhydrides.
- Suitable epoxy compounds and their reaction products are e.g. B. described in DE-A-21 64 386, to which reference is made here in full.
- diepoxide compounds such. B.
- polyalkylene glycols such as polyethylene glycol, polypropylene glycol and copolymers of ethylene oxide and propylene oxide
- diglycidyl ester of phthalic anhydride and maleic acid 6-bis (3,4) -methylcyclohexylmethyl) adipate 3,4-
- Suitable epoxy compounds are also conventional epoxy resins, such as phenol and cresol epoxy novolacs, glycidyl ethers of phenol-aldehyde adducts, glycidyl ethers of phenol-hydrocarbon novolacene, glycidyl ethers of aliphatic diols, aromatic glycidylamines, heterocyclic glycidylimide Glycidyl esters etc.
- Suitable for reaction with these epoxy compounds ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids are, for. B.
- the epoxides can also be reacted with an acid mixture of at least one of the abovementioned ⁇ , ⁇ -ethylenically unsaturated carboxylic acids and at least one saturated mono- and / or dicarboxylic acid.
- Suitable saturated carboxylic acids are e.g. B. formic acid, acetic acid, propionic acid, butyric acid, oxalic acid, malonic acid, succinic acid and mixtures thereof.
- the molecular weight and the double bond content of the compounds B) can be varied within a wide range.
- the molar ratio of epoxy groups to carboxylic acid groups is approximately 1: 0.9 to 1: 1.1.
- Suitable compounds B) are also the reaction products of saturated dicarboxylic acids with ⁇ , ⁇ -ethylenically unsaturated glycidyl compounds.
- Suitable dicarboxylic acids are e.g. B. oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, azelaic acid, sebacic acid etc. and mixtures thereof.
- an olefinically unsaturated glycidyl compound e.g. B. allyl glycidyl ether can be used.
- Suitable compounds B) are also the reaction products of hydroxyl group-bearing monoepoxides with the aforementioned ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids.
- Suitable compounds B) are also the reaction products of the abovementioned ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids with epoxides which have two terminal epoxide groups, according to the general formula
- R 1 , R2 R3 independently of one another for hydrogen, C-
- Suitable compounds B) are also the esters of the aforementioned ⁇ , ⁇ -ethylenically unsaturated mono- and / or dicarboxylic acids with trihydric and polyhydric alcohols, only a part of the hydroxyl groups being esterified, so that the resulting esters still have at least two free hydroxyl groups per Have molecule.
- Suitable trihydric and polyhydric alcohols are the triols and polyols mentioned below as component E).
- Preferred partial esters B) are e.g. B. trimethylolpropane mono (meth) acrylate, erythritol mono- and di (meth) acrylate, pentaerythritol mono- and di (meth) acrylate and mixtures thereof.
- Preferred compounds B) are the reaction products of 2,3-epoxy-1-propanol or bisphenol A diglycidyl ether with acrylic acid and / or methacrylic acid.
- Bisphenol A diglycidyl ether is e.g. B. commercially available as Epikote® 828 from Shell.
- Suitable compounds C) are the esters of the abovementioned ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid and methacrylic acid, with C2 to C2fj diols, preferably C2 to C- j Q diols. These include e.g. B. 2-hydroxyethyl acrylate, 2-hydroxyethyl methacrylate,
- Suitable compounds C) are also the esters of the abovementioned ⁇ , ⁇ -ethylenically unsaturated mono- and / or dicarboxylic acids with trihydric and polyhydric alcohols. By a suitable reaction procedure, only a part of the hydroxyl groups of the alcohol component is esterified, so that the resulting esters have one free hydroxyl group per molecule.
- Suitable alcohols for the preparation of these esters C) are the triols and polyols mentioned below as component E). Preferred compounds C) are then z.
- the aforementioned compounds C) can be used individually or as mixtures.
- Suitable polymers D) are e.g. B. polyols having a molecular weight in the range of about 400 to
- polyesterols preferably about 700 to 2,500.
- polyetherols polycarbonate diols and polycaprolactone diols are suitable for this.
- Suitable polyesterols D) are advantageously predominantly linear polymers with terminal OH groups, preferably those with two OH end groups.
- the acid number of the polyesterols is generally less than 10 and preferably less than 3.
- the polyesterols can be easily obtained by esterification of aliphatic, cycloaliphatic or aromatic dicarboxylic acids with 4 to 15 C atoms, preferably 4 to 6 C atoms, with glycols , preferably glycols with 2 to 25 carbon atoms or by polymerizing lactones with 3 to 20 carbon atoms.
- dicarboxylic acids are malonic acid, glutaric acid, pimelic acid, suberic acid, sebacic acid,
- dodecanedioic acid diphenic acid, isophthalic acid, terephthalic acid, cyclohexanedicarboxylic acid and preferably adipic acid, succinic acid and phthalic acid.
- the dicarboxylic acids can be used individually or as mixtures.
- the polyesterols it may be advantageous to use the corresponding acid derivatives and carboxylic acid anhydrides or carboxylic acid chlorides instead of the dicarboxylic acids.
- glycols examples include diethylene glycol, 1, 5-pentanediol, 1, 10-decanediol and 2,2,4-trimethylpentanediol-1, 5.
- 1, 2-ethanediol, 1, 4-butanediol, 1, 6-hexanediol and 2,2-dimethylpropanediol-1,3 are preferably used; 1,4-dimethylolcyclohexane, 1,6-dimethylolcyclohexane and 1,4-diethanolcyclohexane; and ethoxylated / propoxylated products of 2,2-bis (4-hydroxyphenylene) propane (Bisphenol A).
- the polyols can be used alone or as a mixture in various proportions.
- Suitable lactones for the preparation of the polyesterols are, for. B. ⁇ , ⁇ -dimethyl-ß-propiolactone, ⁇ -butyrolactone and preferably ⁇ -caprolactone.
- Suitable polyetherols D) are essentially linear, terminal hydroxyl-containing substances which contain ether bonds and have a molecular weight of about 400 to 5,000, preferably 700 to 2,500.
- Suitable polyetherols can easily be obtained by polymerizing cyclic ethers, such as tetrahydrofuran, or by reacting one or more alkylene oxides having 2 to 4 carbon atoms in the alkylene radical with a starter molecule which has two active
- alkylene oxides are: ethylene oxide, 1, 2-propylene oxide, epichlorohydrin, 1, 2- and 2,3-butylene oxide.
- the alkylene oxides can be used individually, alternately in succession or as a mixture.
- suitable starter molecules are: water, glycols, such as ethylene glycol, propylene glycol, 1,4-butanediol, 1,6-hexanediol and bisphenol A, amines such as ethylenediamine, hexamethylenediamine and 4,4'-diaminodiphenylmethane, and amino alcohols, like ethanolamine.
- the polyetherols can also be used alone or as mixtures.
- Suitable polycarbonate diols D as well as their preparation, are described in US Pat. No. 4,131,731; they are generally based on 1,6-hexanediol.
- Suitable polymers D) are also polydiols and polyols which have a molecular weight in the range from about 5000 to 30,000.
- the alcohol numbers of these polymers are generally in a range from about 2 to 15, preferably 3 to 10, per molecule.
- the known polyesterols, polyetherols, hydroxyl-containing polycarbonates and hydroxyl-containing polycaprolactams are also suitable for this purpose.
- Preferred polyesterols are then e.g. B. the polycondensation products of di- and / or polyvalent aliphatic, cycloaliphatic and / or aromatic carboxylic acids.
- Suitable cycloaiiphatic dicarboxylic acids are e.g. B. 1, 2-, 1, 3- or 1, 4-cyclohexanedicarboxylic acid.
- Suitable aliphatic dicarboxylic acids are eg malonic acid, succinic acid, adipic acid etc.
- Suitable aromatic carboxylic acids are e.g. As terephthalic acid, isophthalic acid, phthalic acid, trimellitic acid etc.
- the above-mentioned diols, triols and polyols such as polyesterols, polyetherols etc. are generally suitable.
- Aliphatic diols such as ethylene glycol, propylene glycol, 1, 6-hexanediol, neopentyl glycol, diethylene glycol, are preferred .
- Suitable polyesterols D) are e.g. B. as Desmophen®, such as Desmophen®1000, 2000, 2020 from Bayer AG or Dynapol®, such as Dynapol® L206, from Hüls Troisdorf AG.
- Suitable hydroxyl-containing polyethers and polylactones D) are e.g. B. the Niax® "brands of UCC.
- the aforementioned polymers D) can be used individually or as mixtures.
- the polyurethane acrylates a) may optionally have as component E) a compound with two or more active hydrogen atoms per molecule, which is selected from diols, amines with at least two primary and / or secondary amino groups per molecule, amino alcohols, triols, polyols, water and Mixtures of these.
- Suitable amines E) are straight-chain and branched, aliphatic and cycloaliphatic amines with at least two primary and / or secondary amino groups per molecule, which generally have about 1 to 30, preferably about 1 to 20, carbon atoms. These include e.g. B. ethylenediamine, 1, 2-diaminopropane, 1, 3-diaminopropane, 1, 4-diaminobutane, 1, 5-diaminopentane, 1, 6-diaminohexane, 1, 7-
- component E it is also possible to use diols having 2 to 18 carbon atoms, preferably 2 to 10 C atoms and their alkoxylates with a low degree of alkoxylation, for example.
- component E it is also possible to use diols having 2 to 18 carbon atoms, preferably 2 to 10 C atoms and their alkoxylates with a low degree of alkoxylation, for example.
- Ethanediol 1, 3-propanediol, 1, 4-butanediol, 1, 6-hexanediol, 1, 5-pentanediol, 1, 10-decanediol, 2-methyl-1, 3-propanediol, 2-methyl-2-butyI- 1,3-propanediol, 2,2-dimethyl-1,3-propanediol, 2,2-dimethyl-1,4-butanediol, 2-ethyl-2-butyl-1,3-propanediol, hydroxypivalic acid neopentyl glycol ester, diethylene glycol, triethy- lenglycol, bisphenol A, etc.
- the diols can be used individually or as mixtures.
- the diols and diamines E) mentioned can partially, ie. H. in an amount of up to 20% by weight, preferably up to 10% by weight, based on the total amount of E), are replaced by water.
- Suitable compounds E) are also amino alcohols having 2 to 16, preferably 3 to 8 carbon atoms, such as.
- Secondary amino alcohols are preferably used.
- Suitable triols E) are compounds having 3 to 25, preferably 3 to 18, particularly preferably 3 to 6, carbon atoms. Examples of useful triols are glycerol or trimethylolpropane.
- triols and polyols e.g. B. of trimethylolpropane
- alkylene oxides such as ethylene oxide and / or propylene oxide
- erythritol, pentaerythritol and sorbitol can be used as polyols.
- the presence of triols and / or polyols in the polyaddition leads to branching of the end product, which, if there is no local crosslinking, generally has a positive effect on the mechanical properties of the polyurethane.
- the polyurethane acrylates a) are composed of
- the polyurethane acrylates a) are prepared by customary processes known to those skilled in the art.
- the components are preferably used in amounts such that the ratio of the NCO equivalent of the compounds of component A) to the equivalent of the active hydrogen atom of components B), C), D) and, if present, E) in a range from about 0 , 8: 1 to 1, 2: 1, preferred
- the temperature is generally about 20 to 90 ° C, preferably
- the reaction can be carried out without a solvent or in a suitable inert solvent or solvent mixture.
- Aprotic polar solvents e.g. B. halogenated hydrocarbons such as chloroform, carbon tetrachloride, 1, 2-dichloroethane, ketones such as acetone and methyl ethyl ketone, esters such as ethyl acetate, nitriles such as acetonitrile, N-methylpyrrolidone,
- Dimethylformamide, dimethyl sulfoxide, tetrahydrofuran, dioxane etc. are used. If desired, the reaction can be carried out under an inert gas atmosphere, such as. B. under nitrogen.
- the resulting polyurethanes generally no longer have any free isocyanate groups.
- Suitable catalysts for the production of the polyurethane acrylates are e.g. B. tertiary amines such as triethylamine, triethylenediamine, N-methylpyridine and N-methylmorpholine; Metal salts such as tin (II) octoate, lead octoate and zinc stearate, and organic metal compounds such as dibutyltin dilaurate.
- B. tertiary amines such as triethylamine, triethylenediamine, N-methylpyridine and N-methylmorpholine
- Metal salts such as tin (II) octoate, lead octoate and zinc stearate, and organic metal compounds such as dibutyltin dilaurate.
- the appropriate amount of catalyst depends on the effectiveness of the catalyst in question. In general, it has proven expedient to use 0.005 to 0.3 part by weight, preferably 0.01 to 0.1 part by weight, for every 100 parts by weight of
- the polyurethane acrylates a) can be produced by the one-stage process or the two-stage process.
- the starting components are generally nenten dissolved in a portion of the solvent, so that solutions with a solids content of about 30 to 80 wt .-% are formed.
- the solutions are then heated to the reaction temperature indicated above with stirring.
- the components are reacted until the isocyanate group content is practically zero.
- the solutions can then be diluted to a concentration suitable for further processing. Any isocyanate groups still present can finally be reacted with customary demolition agents, such as monoalcohols or monoamines.
- the isocyanate component A if appropriate in part of the solvent, is initially introduced and heated to the reaction temperature. Then components B), D) and optionally E), the catalyst and optionally auxiliaries and additives, optionally also in a part of the solvent, are introduced via one or more feeds
- component A Maintenance of the reaction to the isocyanate component A) added. After the addition is complete, the reaction is continued until the isocyanate group content of the mixture remains practically constant. Then component C) is added in a second stage.
- the resulting polyurethane acrylates a) preferably have a K value (measured according to H.
- Fikentscher Cellulosechemie 30 (1931), p. 58 f.
- a range from about 20 to 80, preferably 25 to 60.
- Suitable compounds b) which have three UV, UV-curable ⁇ , ⁇ -ethylenically unsaturated double bonds per molecule are, for. B. the triesters of the triols mentioned above as component E) and the alkoxylates thereof with the likewise previously mentioned ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid and methacrylic acid.
- component E the triesters of the triols mentioned above as component E) and the alkoxylates thereof with the likewise previously mentioned ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids, preferably acrylic acid and methacrylic acid.
- These include e.g. B. propanetriol triacrylate, trimethylolpropane triacrylate, propanetriol trimethacrylate, trimethylolpropane trimethacrylate, etc. and their alkoxylates.
- polyester acrylates made from polyesterols with three hydroxyl groups and ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acids.
- Processes for the production of polyester acrylates with three hydroxyl groups are known. They generally contain the above-mentioned aliphatic and / or cycloaliphatic diols in combination with a suitable amount of triols and the above-mentioned saturated dicarboxylic acids.
- Suitable compounds b) are urethane acrylates with three ⁇ , ⁇ -ethylenically unsaturated double bonds.
- These include e.g. B. the reaction products of triisocyanates or isocyanate prepolymers with three isocyanate groups with the previously mentioned as component C) hydroxyalkyl (meth) acrylates.
- the triisocyanates or isocyanate prepolymers can also first with at least one chain extender, which is selected from among those previously as a component E) diols, diamines and amino alcohols mentioned, and then reacted with an ⁇ , ⁇ -ethylenically unsaturated mono- or dicarboxylic acid.
- Suitable compounds b) are epoxy acrylates based on triglycidic ether.
- Suitable triglycidyl ethers can e.g. B. by reacting the triols mentioned above as component E) and higher than trihydric alcohols and the alkoxylates thereof with epichlorohydrin. The higher than trihydric alcohols are reacted with epichlorohydrin in a suitable molar ratio so that essentially triglycidyl ether results.
- the triglycidyl ethers can be reacted with the abovementioned ⁇ , ⁇ -ethylenically unsaturated mono- and / or dicarboxylic acids to give the epoxide acrylates b).
- Suitable triglycidyl ethers for the preparation of these compounds b) are e.g. B.
- Trimethylolpropane triglycidyl ether Trimethylolpropane triglycidyl ether, erythritol triglycidyl ether, pentaerythritol triglycidyl ether etc.
- the diesters of the aforementioned diols, polyether diols, polyester diols and polycarbonate diols and the alkoxylates thereof with ⁇ , ⁇ -ethylenically unsaturated mono- and dicarboxylic acids include e.g. B.
- ethanediol diacrylate Ethandioldimethacrylat, propane diol diacrylate, lat propanediol dimethacrylate, butanediol diacrylate, butanediol dimethacrylate, Pentandioldiacry-, hexanediol di (meth) acrylate, Heptandioldi (meth) acrylate, octane diol di (meth) acrylate, Pentandioldi- methacrylate, neopentyl glycol diacrylate, neopentyl glycol dimethacrylate, triethylene glycol diacrylate, triethylene glycol dimethacrylate, Tetraethylene glycol diacrylate, tetraethylene glycol dimethacrylate, tripropylene glycol diacrylate, tripropylene glycol dimethacrylate, cyclohexanediol diacrylate, cyclohexanediol
- Suitable compounds c) are also the reaction products from diglycidyl ethers with ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acids described above as component B).
- Bisphenol A diglycidyl ether diacrylate and dimethacrylate (diacrylates and dimethacrylates from Epikote® 828 from Shell) are preferably used. If desired, the diglycidyl ethers can be used before
- Suitable compounds d) are e.g. B. N-vinylamides of carboxylic, sulfonic and phosphonic acids. These include e.g. B. N-vinylformamide, N-vinyl acetamide, N-vinyl propionamide, etc. N-vinyl formamide is preferably used.
- Suitable monomers d) are also N-vinyl lactams and their derivatives, which, for. B. one or more C-
- n-vinyl pyrrolidone n-vinyl piperidone, n-vinyl caprolactam, n-vinyl morpholine, n-vinyl piperazine, n-vinyl-5-methyl-2-pyrrolidone, n-vinyl-5-ethyl-2-pyrrolidone, n- Vinyl-6-methyl-2-piperidone, n-vinyl-6-ethyl-2-piperidone, n-vinyl-7-methyl-2-caprolactam, n-vinyl-7-ethyl-2-caprolactam, n-vinyl 4-ethyl-piperazine etc.
- Suitable monomers d) are also vinyl- and allyl-substituted heteroaromatic compounds, such as 2- and 4-vinylpyridine, -allylpyridine, and preferably N-vinylheteroaromatics, such as N-vinylimidazole, N-vinyl-2-methylimidazole etc.
- the binder compositions according to the invention can additionally have, as component e), at least one ester of an ⁇ , ⁇ -ethylenically unsaturated monocarboxylic acid with an aliphatic or cycloaliphatic C 1 -C 20 -C 20 "monoalcohol.
- the proportion of this component is then generally about 0 to 30 mol%, based on the total amount of components a) to e).
- Suitable monomers e) are the esters of acrylic acid and / or methacrylic acid with methanol, ethanol, n-propanol, isopropanol, n-butanol, sec-butanol, tert-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol, 2-ethylhexanol, dodecanol, hexadecanol, octadecanol, cyclohexanol etc.
- the network density of the binder compositions according to the invention can be varied within a wide range by using the monofunctional monomers d) and / or e).
- the amount of monomers d) and / or e) is at most 40 mol%, preferably at most 30 mol%, based on the total amount of components a) to e).
- monomers of component d it is generally possible to reduce the viscosity of the binder composition before curing, which generally has an advantageous effect on the flow properties and the processability.
- an acceleration of the curing rate and / or a thorough curing of the binder composition are generally observed.
- the tolerance of the binder compositions to oxygen and oxidizing agents can generally be improved by using the monomers d).
- monomers d when using monomers d), a rapid surface hardening of the binder composition is generally observed.
- monofunctional monomers e) generally lead to binder layers with improved extensibility and / or adhesion.
- binder compositions according to the invention which are curable by UV radiation can, if desired, be used for the production of customary, pigment-free coating compositions.
- These coating compositions generally contain at least one or more conventional photoinitiators. Suitable photoinitiators are those mentioned below, although in general no special mixtures have to be used for curing pigment-free coating agents.
- the binder compositions according to the invention are preferably used for the production of pigment-containing coating compositions, as described below.
- the invention furthermore relates to a coating composition curable by UV radiation, comprising:
- At least one binder composition according to the invention as described above, ii) at least one photoinitiator, iii) at least one pigment which is selected from carbon black, non-magnetic or weakly magnetic metal oxides and mixtures thereof, and also mixtures which
- Carbon black and at least one magnetic pigment contain, iv) at least one polyurethane (meth) acrylate with dispersing groups, v) optionally at least one polyester.
- the coating compositions according to the invention preferably have at least one of the binder compositions described above in an amount of 50 to 95.99% by weight, preferably 60 to 90% by weight, based on the total amount of components i) to v).
- the coating compositions according to the invention contain as component ii) a mixture of photoinitiators which comprise at least one ⁇ -splitter, at least one H-abstractor and at least one acylphosphine oxide or sulfide.
- the photoinitiator mixture then preferably comprises 75 to 98% by weight of the ⁇ -splitter, 1 to 24% by weight of the H abstractor and 1 to 24% by weight of the acylphosphine oxide or sulfide.
- the coating compositions according to the invention preferably have the photoinitiator mixture in an amount of 0.01 to 10% by weight, preferably 0.1 to 9.0% by weight, in particular 0.2 to 8% by weight, based on the total amount of the Components i) to v).
- the ⁇ -splitter is generally referred to as photoinitiators which, after irradiation and light absorption with the decomposition of the excited initiator, form radicals through intramolecular bond cleavage.
- Suitable ⁇ -splitters for the photoinitiator mixtures used according to the invention are selected from benzoin, benzoin ethers, preferably benzoin methyl, benzoinethyl and benzoin isopropyl ether, ⁇ -alkylbenzoin ethers, benzil ketals, such as, for. B.
- R 1 and R 2 independently of one another for hydrogen, C-
- - are C20-alkylthio, phenyl, phenoxy, phenylthio or halogen
- R 3 and R ⁇ independently of one another for C to Cg-alkyl, phenyl-C-
- X represents CH2, O, S or NR 5 , where R 5 is hydrogen, C-
- R 1 is preferably C 1 -C 2 -alkylthio, in particular methylthio.
- R 2 is preferably hydrogen.
- R 3 and R 4 are preferably independently of one another C 1 -C 6 -alkyl and in particular both are methyl.
- X is preferably O or CH2.
- H-Abstractors are very general photoinitiators that, after activation by light absorption through intermolecular hydrogen transfer from a coinitiator to the excited initiator molecule, form radicals.
- Suitable coinitiators are e.g. B. alcohols and primary or secondary amines.
- the addition of a coinitiator can generally be dispensed with, since the binder composition according to the invention has sufficient hydroxyl and / or amino groups.
- Suitable H-abstractors are selected from benzophenone, benzophenone derivatives such as alkyl benzophenones, e.g. B.
- Preferred H-abstractors are selected from thioxanthone and thioxanthone derivatives.
- thioxanthone and thioxanthone derivatives Preferably, e.g. B. an isopropylthioxanthone isomer mixture such as Quantacure®ITX from Shell Chemie can be used.
- Photoinitiators suitable as acylphosphine oxide or sulfide components are DE-A-40 25 386, DE-A-42 31 579, DE-A-42 40 964, EP-A-0 184 095, EP-A-0 413 657, EP-A-0 446 175, EP-A-0 495 751, EP-A-0 495 752, EP-A-0 513 534 and EP-A-0 615 980, to which hereby in its entirety Reference is made.
- acylphosphine oxides or sulfides selected from isobutyroyl diphenylphosphine oxide, sulfide, pivaloyl diphenylphosphine oxide, sulfide, benzoyl diphenylphosphine oxide, sulfide, p-toluyl diphenylphosphine oxide, sulfide, p-tert-butoxybenzylbenzylbenzylbenzyl sulfide, ⁇ -naphthoyl diphenylphosphine oxide, sulfide, 2,6-dimethylbenzoyl diphenylphosphine oxide, sulfide, 2,6-dimethoxybenzoyl diphenylphosphine oxide, sulfide, 2,4,6-trimethylbenzoyl diphenylphosphine oxide, sulfide, 2,6- Dichlorobenzoyl diphenyl
- 2,4,6-dimethylbenzoyldiphenylphosphine oxide bis (2,4,6-trimethylbenzoyD-phenylphosphine oxide, and / or 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide are used.
- a mixture of 2-methyl-1 - [4 (methylthio) phenyl] -2-morpholinopropan-1-one (Irgacure® 907, from Ciba Specialty Chemicals), isopropylthioxanthone (Quantacure® ITX, from Shell) is used in particular as the photoinitiator mixture Chemistry) and 2,4,6-dimethylbenzoyldiphenylphosphine oxide (Lucirin® TPO, from BASF AG), 2,4,6-trimethylbenzoylethoxyphenylphosphine oxide (Lucirin® LR8893, from BASF AG) and / or bis (2,4,6-trimethylbenzoyl ) -phenylphos-phinoxid (from Ciba specialties)
- Another object of the invention is the use of the photoinitiator mixture described above, which comprises at least one ⁇ -splitter, at least one H-abstractor and at least one acylphosphine oxide or sulfide in the curing of soot-containing coating compositions by UV radiation.
- the photoinitiator mixture described above comprises at least one ⁇ -splitter, at least one H-abstractor and at least one acylphosphine oxide or sulfide in the curing of soot-containing coating compositions by UV radiation.
- Sufficiently high curing speeds are advantageously obtained when these photoinitiator mixtures are used, so that the coating agents can generally be used in magnetic tape production at the high processing speeds customary there.
- the technically complex and costly use of devices for curing the soot-containing coating compositions by means of electron beams can thus be dispensed with.
- Another object of the invention is a new photoinitiator mixture, the
- At least one acylphosphine oxide or sulfide as previously defined, at least one ⁇ -splitter, as previously defined, and - at least one H-abstractor, which is selected from benzil, Michler's ketone, anthraquinone, anthraquinone derivatives, thioxanthone, thioxanthone derivatives and mixtures thereof ,
- Suitable anthraquinone and thioxanthone derivatives are those mentioned above. These photoinitiator mixtures are preferably suitable for the curing of pigment-containing and in particular carbon black-containing coating compositions.
- All known carbon blacks or carbon black compounds which have an electrical conductivity are suitable for the coating compositions of the invention which are curable by UV radiation.
- the average particle size of the carbon black is preferably in a range from approximately 5 to 500 mm, preferably approximately 10 to 300 mm.
- Suitable non-magnetic pigments are e.g. B. aluminum oxide, silicon dioxide, titanium dioxide,
- Chromium trioxide or zirconium oxide Chromium trioxide or zirconium oxide.
- Suitable weakly magnetic pigments are the usual ones known to the person skilled in the art. Of the aforementioned pigments, carbon black and pigment mixtures containing carbon black are preferred.
- component iii) are pigment mixtures which contain carbon black and at least one of the im
- the coating compositions according to the invention preferably have component iii) in an amount of 2 to 40% by weight, preferably 10 to 30% by weight, based on the total amount of coating composition i) to v).
- the coating compositions of the invention curable by UV radiation can optionally contain at least one dispersing resin. This is then in an amount of about 0.01 to
- Suitable polyurethane dispersing resins are e.g. B. in DE-A-41 41 838, DE-A-
- Polyurethane (meth) acrylates and / or polyurea (meth) acrylates suitable as dispersing resins can be obtained from:
- a polymer P1) containing hydroxyl groups from: a) 80 to 100 mol% of at least one ester of an ⁇ , ⁇ -ethylenically unsaturated mono- and / or dicarboxylic acid with a C-
- reaction of P2) with ammonia or at least one compound which has amine groups reactive toward isocyanate groups or 111.2) reaction of P2) with a compound which contains groups reactive toward isocyanate groups to give a polymer P3) and subsequent reaction of P3) with a compound through which acidic groups are introduced into the polymer P3), or
- the coating compositions according to the invention can optionally contain at least one hydroxyl-containing polymer. This is then used in an amount of about 0.01 to 50% by weight, preferably about 1 to 45% by weight, based on the total amount of components i) to v). They are preferably polymers which have no ⁇ , ⁇ -ethylenically unsaturated double bonds.
- the polydiols and polyols described above as component D) with a molecular weight in the range from approximately 5000 to 30,000 are suitable. These include in particular the aforementioned Desmophen® brands from Bayer, Niax® brands from Union Carbide and the Dynapol® Brands of Hüls Troisdorf AG and especially Dynapol® L206.
- the coating agent according to the invention can optionally contain further additives. These include e.g. B. conventional flow improvers and / or lubricants.
- the coating compositions of the invention may optionally contain at least one inert diluent. Suitable diluents are e.g. B. aprotic polar solvents such as dialkylformamides, for. B. dimethylformamide and dimethylacetamide, dimethyl sulfoxide, cyclic ethers such as tetrahydrofuran, dioxane, N-alkylpyrrolidones, such as N-methylpyrrolidone, ketones, such as acetone and methyl ethyl ketone, etc. Also suitable are alkanes, cycloalkanes or aromatics and mixtures of the aforementioned solvents .
- Suitable lubricants are e.g. B. carboxylic acids with about 10 to 25 carbon atoms, in particular
- the pigment-containing coating compositions according to the invention are preferably formulated into a pourable mixture for the production of magnetic recording media.
- a pourable mixture can be prepared in a conventional manner.
- a dispersing machine such as a pot ball mill or an agitator mill, from components i) to iii) and optionally iv) and / or v), optionally with the addition of one of the aforementioned diluents, a carbon black dispersion.
- the pourable mixture prior to application e.g. B. for the separation of agglomerates, filtered by conventional methods.
- Another object of the invention is a magnetic recording medium comprising a non-magnetic carrier and at least one magnetic recording layer which contains a finely divided ferromagnetic powder dispersed in a binder and which is applied to the carrier via a primer layer, characterized in that the primer layer is composed of at least one coating agent cured by UV radiation, as described above.
- the magnetic recording media according to the invention are produced in a manner known per se.
- the usual rigid or flexible carrier materials can be used as non-magnetic and non-magnetizable carrier materials, in particular films made of linear polyesters, such as polyethylene terephthalate, generally in thicknesses of 2 to 200 mm and in particular 3 to 100 mm.
- films made of linear polyesters such as polyethylene terephthalate
- the application of the magnetic layers on paper supports is also possible
- a pourable mixture of the soot-containing coating agent according to the invention that can be hardened by UV radiation is first applied to the carrier.
- the coating speed is in a range from about 1 to 800 m per minute, preferably about 5 to 300 m per minute
- Suitable pouring devices for applying the pourable mixture to the movably attached support layer are e.g. B. reverse roller coater, kiss coater, knife coater, knife caster, ruler, roller or reverse roll order devices etc.
- the pourable mixture After the pourable mixture has been applied to the carrier, it is cured with UV light, the mixture if desired beforehand or at elevated temperatures is dried.
- UV curing is carried out in a conventional device by passing the coated support past an actinic light source of light of a wavelength in the range from about 200 to 750 nm, preferably 200 to 400 nm.
- Suitable UV lamps or UV lamps are, for. B. mercury vapor lamps, high pressure mercury lamps, excimer lamps, flash lamps, tungsten halide lamps, hollow cathode lamps, He discharge lamps, excimer lasers, noble gas ion lasers etc
- the temperature is in the
- the carbon black-containing coating compositions according to the invention are advantageously also suitable for coating the back of the carrier material, in particular they serve to improve the mechanical properties of the magnetic recording medium and to reduce the electrostatic charge when unwinding or rewinding.
- the layers can also be applied wet-on-wet to the carrier in one application process, optionally dried together and / or hardened together. Suitable methods for the simultaneous application of several layers are known to the person skilled in the art. In particular, this includes the knife or doctor blade casting process, extrusion or stripping casting process and the cascade casting process. The front and back of the carrier are generally coated at different times.
- the primer layer can be smoothed and compacted before application of the magnetic layer on conventional calendering machines by passing between heated and polished rollers at elevated temperatures and, if appropriate, using pressure.
- the temperature during calendering, like drying, is in a range from about 60 to
- the thickness of the soot-containing primer layer is generally in a range from about 0.05 to 5 mm, preferably 0.3 to 3 mm.
- the carbon black-containing coating compositions according to the invention which contain a photoinitiator mixture as described above, advantageously have such high curing speeds that they cure reliably even at the high tape speeds customary in magnetic tape production.
- the UV-cured films are generally dust-free and solvent-resistant.
- the binder composition according to the invention used in the coating compositions advantageously enables a good dispersion of the carbon black and, if appropriate, further conventional pigments, so that in general no agglomerate or speck formation occurs.
- a conventional magnetic pigment dispersion is used to apply the magnetic layer.
- This generally contains dispersed magnetic pigments in a binder or binder mixture as well as, where appropriate, other customary additives and auxiliaries, such as solvents or diluents, dispersing resins, fillers, lubricants, flow agents, etc.
- Suitable binders for the magnetic material are e.g. B. polymers containing at least one radically polymerizable, ⁇ , ß-ethylenically unsaturated monomer copolymerized. Suitable monomers are C2 to Cß monoolefins, such as. As ethylene, propylene, 1-butene, 2-butene, vinyl aromatics, such as. B. styrene, ⁇ -methylstyrene, o-chlorostyrene or vinyltoluenes, vinyl and vinylidene halides, such as. B.
- - to C2r j -monocarboxylic acids such as. B. vinyl formate, vinyl acetate, vinyl propionate, Vinyl-n-butyrate, vinyl laurate and vinyl stearate, esters ⁇ , ⁇ -monoethylenically unsaturated mono- and dicarboxylic acids with C- ⁇ - to C2o-alkanols, preferably with C-
- Methacrylonitrile amides of acrylic and methacrylic acid, non-aromatic hydrocarbons with 2 to 8 carbon atoms and at least two olefinic double bonds, such as. B. butadiene, isoprene and chloroprene, and mixtures of these monomers.
- Suitable binders for the magnetic material are also cellulose derivatives, e.g. B. cellulose esters, preferably cellulose nitrates, cellulose acetates, cellulose acetopropionates and cellulose sulfobutyrates, and epoxy resins, preferably phenoxy resins, the z. B. contain the reaction products of bisphenols, such as bisphenol A with epichlorohydrin.
- At least one polyurethane resin is preferably used as the binder for the magnetic material.
- Suitable polyurethane resins contain at least one component containing isocyanate groups, which is selected from the diisocyanates, polyisocyanates and isocyanate prepolymers mentioned above. Suitable di-, tri- and polyisocyanates and isocyanate prepolymers are also those mentioned above. Furthermore, the polyurethane resins contain at least one compound which is selected from compounds which contain one or more active hydrogen atoms per molecule. This is e.g. B. selected from the aforementioned amines, polyamines, diols, triols, polyols and amino alcohols. Furthermore, these polyurethane resins generally contain compounds having at least two terminal groups which are reactive toward isocyanate groups and which additionally contain at least one further functional group per molecule.
- Suitable polyurethane resins are those described in DE-A-32 27 163 and DE-A-32 27 164
- Binder for magnetic materials which can be obtained by crosslinking a polyisocyanate with a hydroxyl-containing polyurethane prepolymer.
- the polyurethane prepolymer Is it a thermoplastic polyurea urethane with an OH number between 10 and 120 (or 30 and 160), which consists of the components
- IA 1 mol of a polydiol with a molecular weight between 400 and 4000
- Component IB can be replaced in whole or in part by diamines or amino alcohols with primary or secondary amino groups, corresponding to component IC. These components are used to form urea groups containing hydroxyl groups at the chain ends of the polyurethane prepolymer.
- Suitable binders B) are also described in DE-A-3227 163 binder mixtures of the aforementioned hydroxyl-containing polyurea urethane and a physically drying binder, e.g. based on vinyl formal groups.
- Suitable binders are also the polyurethane binders described in DE-A-39 29 164 based on a branched group containing fluorine groups and soluble in tetrahydrofuran and free of isocyanate groups
- This polyurethane binder is made from
- components A to E are converted into an isocyanate-containing intermediate and this is then reacted with the amino alcohol F.
- the polyurethanes described in DE-A-39 29 165 are also suitable, differing from DE-A-39 29 164 as component D 0.01 to
- Suitable binders are also the polyurethane resins described in German patent application P 197 57 670.2, which can be obtained by crosslinking at least one polyisocyanate with at least one isocyanate group-free polyurethane prepolymer containing at least three active hydrogen atoms, the polyurethane prepolymer having at least two hydroxyl groups and at least one primary and / or has a secondary amino group.
- the binders for the magnetic material can optionally additionally contain a physically drying cobinder.
- a physically drying cobinder are known in principle. These include polyvinyl formal binders, which are produced by hydrolysis of a polymer of a vinyl ester and subsequent reaction of the resulting vinyl alcohol polymer with formaldehyde.
- the polyvinyl formals expediently have a vinyl formal group content of at least 65% by weight and in particular at least 80% by weight.
- Particularly suitable polyvinyl formals have a vinyl alcohol group content of 5 to 13% by weight, a vinyl formal group content of 80 to 88% by weight, a specific weight of approx.
- vinyl chloride diol or di (meth) acrylate copolymers are suitable which, for. B. in a conventional manner by solution copolymerization or suspension copolymerization of vinyl chloride and the diol mono (meth) acrylate or di (meth) acrylate.
- the diol mono- or diacrylate or methacrylate used for this is an esterification product of acrylic acid or methacrylic acid with the corresponding molar amount of aliphatic diol with 2 to 4 carbon atoms, such as ethylene glycol, 1,4-butanediol and preferably propanediol, the Propanediol preferably consists of 1,3-propanediol and 0 to 50% by weight 1,2-propanediol.
- the copolymers advantageously have a vinyl chloride content of about 50 to 95% by weight and a diol acrylate or methane acrylate content of about 5 to 50 wt .-%.
- Particularly suitable copolymers preferably have a content of about 70 to 90% by weight of vinyl chloride and 10 to 30% by weight of diol monoacrylate or diol monomethacrylate.
- a 15% solution of particularly suitable copolymers, such as vinyl chloride / propanediol monoacrylate copolymers, in a mixture of the same Volumes of tetrahydrofuran and dioxane have a viscosity of about 30 mPas at 25 ° C.
- the K value of the particularly suitable products is generally between 30 and 50, preferably around 40.
- phenoxy resins with repeating units of the formula can advantageously be used as cobinders
- n is approximately equal to 100.
- polymers as are known under the trade names Epikote® from Shell Chemical Co. or under the name Epoxidharz PKHH® from Union Carbide Corporation.
- cellulose ester binders are suitable as cobinders.
- the binders used according to the invention contain 0 to 30% of a dispersing resin.
- Suitable dispersing resins are e.g. B. described in DE-A-195 16 784, DE-A-41 41 838 and DE-A-4446 383, to which reference is made in full here.
- binders for the magnetic material which contain 5 to 25% by weight, preferably 10 to 20% by weight, of these dispersing resins, based on the total amount of binder.
- the further processing of the binder mixture with magnetic materials and auxiliaries into magnetic recording media is carried out in a manner known per se.
- the pigments known per se can be used, which significantly influence the properties of the resulting magnetic layers, such as, for. B. gamma iron (III) oxide, finely divided magnetite, ferromagnetic undoped or doped chromium dioxide, cobalt modified gamma-iron (III) oxide, barium ferrites or ferromagnetic metal particles.
- gamma iron (III) oxide finely divided magnetite, ferromagnetic undoped or doped chromium dioxide, cobalt modified gamma-iron (III) oxide, barium ferrites or ferromagnetic metal particles.
- Preferred are needle-shaped, in particular dedrite-free, cobalt-modified or unmodified gamma-iron (III) oxide as well as ferromagnetic chromium dioxide and metal pigment.
- the use of metal pigment is particularly preferred.
- the specific surface area is generally at least 15 m 2 / g (BET method) and is preferably in the range from 30 to 200
- the binders for the magnetic material can be used in recipes without the additional use of low molecular weight dispersants. But it is also possible to add small amounts of dispersant, such as. B. lecithin, Zn oleate or Zn stearate.
- the magnetic layers can contain small amounts of additives, such as lubricants and / or fillers, which can be mixed in during the dispersion of the magnetic materials or during the production of the magnetic layer.
- additives such as salts of fatty acids or isomerized fatty acids, such as stearic acid, with metals from the first to fourth main groups of the Periodic Table of the Elements, and also fatty acid esters, such as butyl stearate, or waxes, silicone oils, carbon black, etc.
- the amount of the additives is the usual, it is generally below 10% by weight, based on the total amount of the magnetic layer.
- the quantitative ratio of magnetic material to binder in the recording materials according to the invention is in the range from about 1 to 12 and in particular 3 to 8 parts by weight of magnetic material to about one part by weight of the total binder.
- the magnetic layer is also applied to the carrier provided with at least one primer layer by customary methods known to the person skilled in the art.
- a pourable mixture of the dispersion of the magnetic material in at least one binder, optionally with the addition of at least one further cobinder and / or further additives is produced analogously to the application method of the primer layer and applied to the movably attached, non-magnetic carrier material.
- the magnetic pigment dispersion can be produced analogously to the production of the soot-containing coating agent in a conventional dispersion machine. This is applied, if necessary after filtering, to the movable, non-magnetic carrier material using one of the usual coating machines mentioned above.
- the coatings can generally be applied to the non-magnetic carrier at high speeds. They can then be dried, calendered and optionally finally cured at temperatures in a range from about 60 to 120 ° C., preferably about 80 to 110 ° C.
- the application speed is generally in a range from about 1 to 1,500 m per minute, preferably 100 to 1,000 m per minute, in particular 300 to 900 m per minute.
- the magnetic layers can optionally be smoothed and compressed after a certain dwell time on conventional calendering machines by passing them between heated and polished rollers at elevated temperatures and, if appropriate, using pressure.
- the temperature during calendering like that during drying, is in a range from approximately 60 to 120 ° C., preferably approximately 70 to 100 ° C.
- the thickness of the magnetic layer is generally about 0.5 to 20 mm, preferably about 1 to 10 mm.
- the coated foils are cut in the longitudinal direction in the usual widths, which are usually determined by inches.
- a leveling agent Flourad® FC 430
- 2-methyl-1- [4 (methylthio) phenyl ] -2- morpholinopropan-1-one Irgacure® 907, Ciba Specialty Chemicals
- isopropylthioxanthone Quantacure® ITX, Shell Chemical
- the non-pigment-containing dispersion thus obtained was applied to a 36 mm thick polyethylene terephthalate film at a speed of 45 m / min by means of a conventional ruler and dried in a 4 m long drying duct at 80 ° C.
- the approximately 1 mm thick layer was then cured in air by passing it under a UV lamp (200 watt / cm, wavelength 200 to 400 nm).
- the UV-cured adhesive layer thus obtained was insoluble and free from defects in tetrahydrofuran / dioxane (1: 1). It was immediately overcoated inline with a conventional iron oxide-based magnetic dispersion (in tetrahydrofuran / dioxane (1: 1)).
- the magnetic data carrier produced in this way was error-free and had excellent adhesive strength.
- Conductive carbon black (XL72, BET surface area 45 m 2 / g) and 0.535 kg of a 50% strength by weight solution (in tetrahydrofuran / dioxane (1: 1)) of a dispersing resin based on a polyurethane acrylate with dispersing SOßNa groups, and then stirred in stirred for half an hour.
- the carbon black dispersion obtained in this way was applied to a 36 mm thick polyethylene terephthalate film at a speed of 45 m / min using a conventional ruler and dried at 80 ° C. in a 4 m long drying tunnel.
- the approximately 1 mm thick layer was then cured in air by passing it under a UV lamp (200 watt / cm, wavelength 200 to 400 nm).
- the UV-cured adhesive layer thus obtained was insoluble and free of defects in tetrahydrofuran / dioxane (1: 1). It was immediately overcoated inline with a conventional iron oxide-based magnetic dispersion (in tetrahydrofuran / dioxane (1: 1)).
- the magnetic data carrier produced in this way was error-free and had excellent adhesive strength and a conductivity improved by a factor of 10 compared to an adhesion promoter layer without soot.
- polyester diol Mg about 20,000 (Dynapol® L 206 from Huls Troisdorf, AG) 28.35 kg of an adduct of 2 moles of ethylene oxide and 1 mole of bisphenol A.
- the procedure was analogous to Example 2, but no polyurethane acrylate with dispersing groups was used to produce the adhesion promoter layer.
- the dispersed carbon black was poorly distributed in the adhesion promoter layer and warts and specks were formed in the adhesion promoter layer.
- the magnetic data carrier obtained after overcoating with an iron oxide-based magnetic dispersion had a large number of defects and was unusable.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Paints Or Removers (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99953758A EP1141952A1 (de) | 1998-11-09 | 1999-10-08 | Durch uv-bestrahlung härtbare bindemittelzusammensetzung für magnetische aufzeichnungsmedien und photoinitiatormischung |
AU10339/00A AU1033900A (en) | 1998-11-09 | 1999-10-08 | Uv-radiation-hardenable binder composition for magnetic recording media and photoinitiator mixture |
JP2000581640A JP2002529880A (ja) | 1998-11-09 | 1999-10-08 | 磁気記録媒体のためのuvによる硬化が可能な結合剤組成物および光重合開始剤混合物 |
KR1020017005849A KR20010075691A (ko) | 1998-11-09 | 1999-10-08 | 자기 기록 매체용 uv-조사 경화성 결합제 조성물 및광개시제 혼합물 |
NO20012258A NO20012258L (no) | 1998-11-09 | 2001-05-08 | Bindemiddelblanding for magnetisk registreringsmedia og fotoinitiatorsammensetning som er herdbar ved UV-stråling |
US09/851,385 US20020022130A1 (en) | 1998-11-09 | 2001-05-09 | UV-curable binder composition for magnetic recording media and photoinitiator mixture |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19851567.7 | 1998-11-09 | ||
DE19851567A DE19851567A1 (de) | 1998-11-09 | 1998-11-09 | Durch UV-Bestrahlung härtbare Bindemittelzusammensetzung für magnetische Aufzeichnungsmedien und Photoinitiatormischung |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/851,385 Continuation US20020022130A1 (en) | 1998-11-09 | 2001-05-09 | UV-curable binder composition for magnetic recording media and photoinitiator mixture |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000028531A1 true WO2000028531A1 (de) | 2000-05-18 |
Family
ID=7887145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/007554 WO2000028531A1 (de) | 1998-11-09 | 1999-10-08 | Durch uv-bestrahlung härtbare bindemittelzusammensetzung für magnetische aufzeichnungsmedien und photoinitiatormischung |
Country Status (8)
Country | Link |
---|---|
US (1) | US20020022130A1 (de) |
EP (1) | EP1141952A1 (de) |
JP (1) | JP2002529880A (de) |
KR (1) | KR20010075691A (de) |
AU (1) | AU1033900A (de) |
DE (1) | DE19851567A1 (de) |
NO (1) | NO20012258L (de) |
WO (1) | WO2000028531A1 (de) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4123944B2 (ja) * | 2003-01-21 | 2008-07-23 | 富士電機デバイステクノロジー株式会社 | 垂直二層パターンド媒体およびその製造方法 |
JP2005129184A (ja) * | 2003-10-27 | 2005-05-19 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
JP4321431B2 (ja) * | 2004-10-19 | 2009-08-26 | 富士フイルム株式会社 | 磁気記録媒体 |
CN100448939C (zh) * | 2004-12-20 | 2009-01-07 | 比亚迪股份有限公司 | 一种紫外光固化涂料及其制备方法 |
US7569160B2 (en) * | 2007-04-10 | 2009-08-04 | Henkel Ag & Co. Kgaa | Electrically conductive UV-curable ink |
US20090130448A1 (en) * | 2007-11-16 | 2009-05-21 | Arnold Magnetic Technologies | Flexible magnets having a printable surface and methods of production |
JP5441381B2 (ja) * | 2008-09-19 | 2014-03-12 | 富士フイルム株式会社 | 光硬化性インク組成物、及びインクジェット記録方法 |
KR102185021B1 (ko) * | 2013-07-26 | 2020-12-01 | 디아이씨 가부시끼가이샤 | 광경화성 수지 조성물, 그 경화물 및 플라스틱 렌즈 |
WO2015060458A1 (ja) * | 2013-10-25 | 2015-04-30 | 日産化学工業株式会社 | ヒドロキシ基を有するパーフルオロポリエーテルを含む重合性組成物 |
WO2019030327A1 (de) * | 2017-08-09 | 2019-02-14 | Basf Se | Transparentes thermoplastisches polyurethan basierend auf tdi |
US12014760B2 (en) | 2019-08-20 | 2024-06-18 | International Business Machines Corporation | Process for forming tape media having synergistic magnetic recording layer and underlayer |
US11152027B2 (en) | 2019-08-20 | 2021-10-19 | International Business Machines Corporation | Tape media having synergistic magnetic recording layer and underlayer |
US11158340B2 (en) | 2019-08-20 | 2021-10-26 | International Business Machines Corporation | Underlayer formulation for tape media |
US11158339B2 (en) | 2019-08-20 | 2021-10-26 | International Business Machines Corporation | Magnetic recording layer formulation for tape media |
US11158337B2 (en) | 2019-08-20 | 2021-10-26 | International Business Machines Corporation | Tape cartridge having tape media having synergistic magnetic recording layer and underlayer |
US11410697B2 (en) | 2019-08-20 | 2022-08-09 | International Business Machines Corporation | Process for forming underlayer for tape media |
US11790942B2 (en) | 2019-08-20 | 2023-10-17 | International Business Machines Corporation | Process for forming magnetic recording layer for tape media |
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DE3428943A1 (de) * | 1983-08-09 | 1985-02-28 | TDK Corporation, Tokio/Tokyo | Magnetisches aufzeichnungsmedium |
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DE3227164A1 (de) * | 1982-07-21 | 1984-01-26 | Basf Ag, 6700 Ludwigshafen | Magnetische aufzeichnungstraeger |
DE3332504A1 (de) * | 1983-09-09 | 1985-03-28 | Basf Ag, 6700 Ludwigshafen | Magnetische aufzeichnungstraeger |
DE3332564A1 (de) * | 1983-09-09 | 1985-03-28 | Basf Ag, 6700 Ludwigshafen | Magnetische aufzeichnungstraeger |
DE3418482A1 (de) * | 1984-05-18 | 1985-11-21 | Basf Ag, 6700 Ludwigshafen | Magnetische aufzeichnungstraeger |
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DE3929164A1 (de) * | 1989-09-02 | 1991-03-07 | Basf Ag | Magnetische aufzeichnungstraeger |
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EP0446175A3 (en) * | 1990-03-09 | 1991-11-21 | Ciba-Geigy Ag | Mixture of photoinitiators |
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JPH04305830A (ja) * | 1991-04-02 | 1992-10-28 | Kuraray Co Ltd | 光情報記録媒体 |
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-
1998
- 1998-11-09 DE DE19851567A patent/DE19851567A1/de not_active Withdrawn
-
1999
- 1999-10-08 EP EP99953758A patent/EP1141952A1/de not_active Withdrawn
- 1999-10-08 WO PCT/EP1999/007554 patent/WO2000028531A1/de not_active Application Discontinuation
- 1999-10-08 KR KR1020017005849A patent/KR20010075691A/ko not_active Withdrawn
- 1999-10-08 JP JP2000581640A patent/JP2002529880A/ja active Pending
- 1999-10-08 AU AU10339/00A patent/AU1033900A/en not_active Abandoned
-
2001
- 2001-05-08 NO NO20012258A patent/NO20012258L/no not_active Application Discontinuation
- 2001-05-09 US US09/851,385 patent/US20020022130A1/en not_active Abandoned
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DE3428943A1 (de) * | 1983-08-09 | 1985-02-28 | TDK Corporation, Tokio/Tokyo | Magnetisches aufzeichnungsmedium |
EP0394695A2 (de) * | 1989-03-30 | 1990-10-31 | Toyo Boseki Kabushiki Kaisha | Strahlungshärtbares Harz und dessen Zusammensetzung |
EP0418011A2 (de) * | 1989-09-12 | 1991-03-20 | Sericol Limited | Photohärtbare Zusammensetzungen |
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Also Published As
Publication number | Publication date |
---|---|
DE19851567A1 (de) | 2000-05-11 |
EP1141952A1 (de) | 2001-10-10 |
NO20012258L (no) | 2001-07-06 |
US20020022130A1 (en) | 2002-02-21 |
KR20010075691A (ko) | 2001-08-09 |
AU1033900A (en) | 2000-05-29 |
NO20012258D0 (no) | 2001-05-08 |
JP2002529880A (ja) | 2002-09-10 |
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