WO2001064794A2 - Verfahren zur herstellung von beschichtungen, klebschichten oder dichtungen für grundierte oder ungrundierte substrate - Google Patents
Verfahren zur herstellung von beschichtungen, klebschichten oder dichtungen für grundierte oder ungrundierte substrate Download PDFInfo
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- WO2001064794A2 WO2001064794A2 PCT/EP2001/002281 EP0102281W WO0164794A2 WO 2001064794 A2 WO2001064794 A2 WO 2001064794A2 EP 0102281 W EP0102281 W EP 0102281W WO 0164794 A2 WO0164794 A2 WO 0164794A2
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- 238000005336 cracking Methods 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- WJTCGQSWYFHTAC-UHFFFAOYSA-N cyclooctane Chemical compound C1CCCCCCC1 WJTCGQSWYFHTAC-UHFFFAOYSA-N 0.000 description 1
- 239000004914 cyclooctane Substances 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 239000000412 dendrimer Substances 0.000 description 1
- 229920000736 dendritic polymer Polymers 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 description 1
- 239000012975 dibutyltin dilaurate Substances 0.000 description 1
- 125000004177 diethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000005670 electromagnetic radiation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000003700 epoxy group Chemical group 0.000 description 1
- BXOUVIIITJXIKB-UHFFFAOYSA-N ethene;styrene Chemical compound C=C.C=CC1=CC=CC=C1 BXOUVIIITJXIKB-UHFFFAOYSA-N 0.000 description 1
- 150000002170 ethers Chemical class 0.000 description 1
- AEOCXXJPGCBFJA-UHFFFAOYSA-N ethionamide Chemical compound CCC1=CC(C(N)=S)=CC=N1 AEOCXXJPGCBFJA-UHFFFAOYSA-N 0.000 description 1
- ABUWPPJBRQFDGF-UHFFFAOYSA-N ethyl n,n-bis(ethenyl)carbamate Chemical compound CCOC(=O)N(C=C)C=C ABUWPPJBRQFDGF-UHFFFAOYSA-N 0.000 description 1
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 235000019382 gum benzoic Nutrition 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 125000001072 heteroaryl group Chemical group 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- 229920001903 high density polyethylene Polymers 0.000 description 1
- 239000004700 high-density polyethylene Substances 0.000 description 1
- 150000002432 hydroperoxides Chemical class 0.000 description 1
- UHOKSCJSTAHBSO-UHFFFAOYSA-N indanthrone blue Chemical compound C1=CC=C2C(=O)C3=CC=C4NC5=C6C(=O)C7=CC=CC=C7C(=O)C6=CC=C5NC4=C3C(=O)C2=C1 UHOKSCJSTAHBSO-UHFFFAOYSA-N 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012690 ionic polymerization Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 1
- 235000013980 iron oxide Nutrition 0.000 description 1
- VBMVTYDPPZVILR-UHFFFAOYSA-N iron(2+);oxygen(2-) Chemical class [O-2].[Fe+2] VBMVTYDPPZVILR-UHFFFAOYSA-N 0.000 description 1
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 229920000092 linear low density polyethylene Polymers 0.000 description 1
- 239000004707 linear low-density polyethylene Substances 0.000 description 1
- POYDCAKGHSRECA-UHFFFAOYSA-M lithium;decanoate Chemical compound [Li+].CCCCCCCCCC([O-])=O POYDCAKGHSRECA-UHFFFAOYSA-M 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- NEMFQSKAPLGFIP-UHFFFAOYSA-N magnesiosodium Chemical compound [Na].[Mg] NEMFQSKAPLGFIP-UHFFFAOYSA-N 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 229910052901 montmorillonite Inorganic materials 0.000 description 1
- FTWUXYZHDFCGSV-UHFFFAOYSA-N n,n'-diphenyloxamide Chemical class C=1C=CC=CC=1NC(=O)C(=O)NC1=CC=CC=C1 FTWUXYZHDFCGSV-UHFFFAOYSA-N 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- OTLDLKLSNZMTTA-UHFFFAOYSA-N octahydro-1h-4,7-methanoindene-1,5-diyldimethanol Chemical compound C1C2C3C(CO)CCC3C1C(CO)C2 OTLDLKLSNZMTTA-UHFFFAOYSA-N 0.000 description 1
- 230000009965 odorless effect Effects 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 150000003008 phosphonic acid esters Chemical class 0.000 description 1
- PTMHPRAIXMAOOB-UHFFFAOYSA-N phosphoramidic acid Chemical compound NP(O)(O)=O PTMHPRAIXMAOOB-UHFFFAOYSA-N 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 229920002120 photoresistant polymer Polymers 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 229920000058 polyacrylate Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 229920002959 polymer blend Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000003678 scratch resistant effect Effects 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 125000005373 siloxane group Chemical group [SiH2](O*)* 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 150000003457 sulfones Chemical class 0.000 description 1
- 150000003459 sulfonic acid esters Chemical class 0.000 description 1
- 150000003460 sulfonic acids Chemical class 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
- 229920001059 synthetic polymer Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 238000010345 tape casting Methods 0.000 description 1
- 238000001029 thermal curing Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 125000002813 thiocarbonyl group Chemical group *C(*)=S 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 150000003578 thiophosphoric acid amides Chemical class 0.000 description 1
- 150000003580 thiophosphoric acid esters Chemical class 0.000 description 1
- 238000005809 transesterification reaction Methods 0.000 description 1
- 150000003918 triazines Chemical class 0.000 description 1
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 description 1
- 229920006337 unsaturated polyester resin Polymers 0.000 description 1
- 150000003673 urethanes Chemical class 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 150000003738 xylenes Chemical class 0.000 description 1
- CHJMFFKHPHCQIJ-UHFFFAOYSA-L zinc;octanoate Chemical compound [Zn+2].CCCCCCCC([O-])=O.CCCCCCCC([O-])=O CHJMFFKHPHCQIJ-UHFFFAOYSA-L 0.000 description 1
- 229910001928 zirconium oxide Inorganic materials 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/068—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using ionising radiations (gamma, X, electrons)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0209—Multistage baking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/02—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
- B05D3/0254—After-treatment
- B05D3/0263—After-treatment with IR heaters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
Definitions
- the present invention relates to a new process for the production of coatings, adhesive layers or seals for primed or unprimed substrates made of free-radically and / or ionically curable coating materials. Adhesives or sealants from radiation.
- the present invention relates to the primed or unprimed substrates which have at least one coating, an adhesive layer and / or a seal, produced by the new method.
- European patent applications EP 0 928 800 A1, 0 636 669 A1, 0 410 242 A1, 0 783 534 A1, 0 650 978 A1, 0 650 979 A1, 0 650 985 A1, are examples of European patent applications 540 884 A 1, 0 568 907 A 1, 0 054 505 A 1 or 0 002 866 A 1, the German patent applications DE 197 09 467 A 1, 42 03 278 A 1, 33 16 593 A 1, 38 36 370 A 1 , 24 36 186 A1 or 20 03 579 B1, the international patent applications WO 97/46549 or 99/14254 or the American patents US 5,824,373 A1, 4,675,234 A1, 4,634,602 A1, 4,424,252 A1, 4,208,313 A1, 4,163,810 A 1, 4,129,488 AI, 4,064,161 A 1 or 3,974,303 A 1.
- coating materials are known which can be crosslinked thermally and with actinic radiation (cf. European patent application EP 0 844 286 AI), which experts also refer to as dual cure.
- the known coating materials can be in the form of anhydrous and solvent-free liquids and melts (so-called 100% systems), powders, dispersions of powders in water (so-called powder slurries) or in the form of dispersions or solutions in at least one organic solvent. This also applies to the known adhesives and sealing compounds.
- Actinic radiation is understood here and below to mean electromagnetic radiation such as visible light, UV radiation or X-rays, but in particular UV radiation, and corpuscular radiation such as electron beams.
- coating materials, adhesives and sealants that are curable with UV radiation are characterized by special advantages such as a short cycle time, low energy consumption during curing and the possibility of coating, bonding and sealing thermally sensitive substrates.
- special advantages such as a short cycle time, low energy consumption during curing and the possibility of coating, bonding and sealing thermally sensitive substrates.
- they still have very specific disadvantages.
- the known free-radically and / or ionically curable coating materials, adhesives and sealants contain photoinitiators which, when irradiated with UV radiation, form radicals or cations which initiate the free-radical or ionic polymerization or crosslinking of component (A) (cf.Römpp Chemie Lexikon Varnishes and Printing Inks, Georg Thieme Verlag, Stuttgart, New York, 1998, "Photoinitiatoren", pages 444 to 446).
- component (A) cf.Römpp Chemie Lexikon Varnishes and Printing Inks, Georg Thieme Verlag, Stuttgart, New York, 1998, "Photoinitiatoren", pages 444 to 446.
- the disadvantage here is that the photoinitiators provide decay products that have an unpleasant smell and / or are colored. This leads to undesirable emissions and yellowing of the coatings, adhesives and sealants, which is particularly unacceptable with decorative coatings or glued glass plates.
- the photopolymerization can furthermore be inhibited by atmospheric oxygen, which is why either work must be carried out in the absence of air, or the inhibition must be compensated for by a very high initiator concentration or by so-called coinitiators. Nevertheless, the required surface properties can often not be achieved.
- the known powder coating materials curable with UV radiation have the disadvantage that they cannot be completely melted on temperature-sensitive substrates before the actual curing, because otherwise the substrate will be damaged. For this reason, coatings with a more or less structured surface result in many cases, but this is not acceptable for particularly demanding uses, such as automotive painting.
- thermoreactive powder coating is applied to the wood surface and melted with NIR radiation and pre-gelled or partially hardened.
- a second layer of the powder coating is then applied, after which the not yet fully cured layers are completely crosslinked with NIR radiation.
- UV radiation is considered unsuitable.
- German patent application DE 197 36 462 A1 describes devices and methods for thermoforming thermoplastics with NIR radiation. The curing of free-radically and / or ionically curable coating materials, adhesives and sealing compounds is not dealt with here. From the German patent application DE 197 35 070 A 1 devices for producing sheet-like printed products are known, in which the printed products are thermally dried with NIR radiation. The combined use of NIR radiation and UV radiation is not mentioned here.
- At least one free-radically and / or ionically curable coating material and / or adhesive and / or at least one free-radically and / or ionically curable sealant comprising at least one constituent (A), which on average has at least one group (a) with at least one bond that can be activated with actinic radiation per molecule, in the form
- the resulting powder slurry layer (1.3) or the resulting layer from a dispersion or a solution (1.4) or (1.5) dries or the resulting layer of the melt (1.1) solidifies or continues to be melted by heating,
- NIR radiation near infrared radiation
- the object of the present invention is to meet the need described above and a new process for the production of coatings
- the new process is intended to enable the production of smooth, structureless coatings also from powder coatings curable with actinic radiation.
- At least one constituent which, on statistical average, has at least one group (a) with at least one bond which can be activated with actinic radiation, and
- the resulting powder slurry layer (1.3) or the resulting layer from a dispersion or a solution (1.4) or (1.5) dries or the resulting layer of the melt (1.1) solidifies or continues to be melted by heating,
- NIR radiation near infrared radiation
- Invention is based, could be solved with the help of the inventive method. It was particularly surprising that with the help of the invention Process-known coating materials, adhesives and sealing compounds can be crosslinked radically and / or ionically without NIR radiation-absorbing dyes or the customarily used amounts of photoinitiators being present. Even more surprising was the extraordinarily broad usability of the method according to the invention, particularly in the field of coating primed and unprimed substrates. In addition, it was surprising that with the aid of the method according to the invention, coatings with a smooth and structureless surface could also be produced from powdery coating materials.
- the method according to the invention is used for coating, gluing and / or sealing primed or unprimed substrates.
- Suitable substrates are all surfaces of objects that harden the layers of coating materials, adhesives and / or sealants on the combined application of actinic
- Household appliances small parts made of metal, hubcaps, rims, coils, containers and electrotechnical components, such as windings of electric motors, in high
- the metallic substrates used here can have a primer, in particular a cathodically (KTL) or anodically (ATL) deposited and thermally hardened electrodeposition coating (ETL). Possibly (O
- the electrocoating can also be coated with a stone chip protection primer or a filler.
- the inventive method is also used in particular for coating, gluing or sealing primed or non-primed plastics such.
- the plastics can of course also be polymer blends, modified plastics or fiber-reinforced plastics. In the case of non-functionalized and / or non-polar plastic surfaces, these can be pretreated in a known manner with a plasma or with flame and / or coated with a hydro primer from a hydro primer before coating.
- At least one coating material, an adhesive and / or a sealing compound is applied to and / or into the substrate described above.
- the application can be done by all common application methods, e.g. Spraying, knife coating, brushing, pouring, dipping, watering, trickling or rolling.
- the substrate to be coated, glued or sealed can rest as such, with the application device or system being moved.
- the substrate to be coated, to be glued or to be sealed, in particular a coil can also be moved, the application system being at rest relative to the substrate or being moved in a suitable manner.
- Spray application methods are preferably used, such as, for example, compressed air spraying, airless spraying, high rotation, electrostatic spray application (ESTA), possibly combined with hot spray applications such as hot air - hot spraying.
- the application can be carried out at temperatures of max. 70 to 80 ° C. are carried out so that suitable application viscosities are achieved without the change in or damage to the coating material, the adhesive or the sealing compound and, if appropriate, the overspray to be reprocessed occurring under the briefly acting thermal load.
- hot spraying can be designed in such a way that the coating material, the adhesive or the sealing compound is heated only very briefly in or shortly before the spray nozzle.
- the spray booth used for the application can be operated, for example, with a circulation that can be tempered, if necessary, which is operated with a suitable absorption medium for the overspray, e.g. B. the coating material to be used according to the invention itself is operated.
- the coating material, the adhesive and the sealing compound can be in the form of an anhydrous and solvent-free liquid or melt (1.1).
- a liquid is understood to mean a substance which is liquid at room temperature.
- a melt is understood to be a substance that is solid at room temperature and that only liquefies above room temperature.
- Coating materials, adhesives or sealing compounds (1.1) of this type are also referred to by experts as 100% systems.
- the coating material, the adhesive and the sealing compound can also be in the form of a powder (1.2).
- Coating materials (1.2) of this type are known by experts as powder coatings.
- the powdered coating materials, adhesives and sealants can, however, also be dispersed in an aqueous medium (1.3).
- aqueous medium can be water or water in which low molecular weight, oligomeric and / or polymeric, gaseous, liquid and / or solid, inorganic and / or organic substances, such as for example the additives (C) described below, are dissolved or dispersed , act. It is essential here that these substances are only present in an amount which does not destroy the aqueous nature of the aqueous medium.
- Coating materials (1.3) of this type are known by experts as powder slurries.
- coating materials, adhesives and sealants can be in the form of a dispersion or a solution in at least one organic solvent (1.5).
- Coating materials (1.5) of this type are known by experts as conventional coating materials.
- the coating materials, adhesives and sealants can be in the form of a dispersion or a solution in at least one aqueous medium.
- Coating materials of this type are known by experts as aqueous coating materials.
- the resulting powder slurry layer (1.3) or the resulting layer from a dispersion or a solution (1.4) or (1.5) is dried in method step (2).
- the resulting layer (1.1) is allowed to solidify or is kept in a molten state by heating.
- the layer (1.1) can be heated in the usual and known manner with hot air, for example in forced air ovens, or with conventional infrared lamps. According to the invention, it is also advantageous to use NIR radiation in this method step (2). If coating materials, adhesives or sealants (1.2), (1.3), (1.4) or (1.5) are used, the solid layer (1.2), (1.3), (1.4.) Resulting from process step (2) is used in process step (3) ) or (1.5) melted by heating.
- the layer (1.2), (1.3), (1.4) or (1.5) can be heated in a customary and known manner with hot air, for example in forced air ovens, or with conventional infrared lamps. According to the invention, it is also advantageous to use NIR radiation in this method step (3).
- NIR radiation near infrared radiation
- partial or complete crosslinking of the complementary reactive functional groups described below, which are suitable for thermal crosslinking can already occur, provided that these exist in the coating materials, adhesives and sealants to be used according to the invention.
- the coating materials, adhesives and sealants to be used according to the invention can be crosslinked via the bonds described below which can be activated with actinic radiation. According to the invention, it is advantageous if no or only partial, preferably partial, crosslinking occurs.
- NIR radiation of a wavelength for which the solid layers (1.2), (1.3), (1.4) and (1.5), the liquids and melts (1.1) and those resulting in process step (4) Melt are partially permeable.
- the radiated NIR radiation is 20 to 80%, in particular, increased ⁇
- the layers irradiated with NIR radiation are then completely cured with UV radiation and / or electron radiation, which results in the coatings, adhesive layers and seals according to the invention.
- the layers described above are completely cured simultaneously with NIR radiation and with UV radiation and / or electron radiation.
- the first variant of the method according to the invention is advantageous and is therefore used with preference.
- the irradiation with NIR radiation in process step (4) has no peculiarities, but takes place with the help of commercially available radiators, which emit a high proportion of their radiation in the near infrared.
- suitable spotlights are halogen spotlights with a high filament temperature, such as those sold by Ushio Inc., Tokyo, Japan or IndustrieService, Germany.
- the NIR radiation can be directed and focused by optical devices in such a way that a temperature distribution is achieved which is adapted to the melting and hardening characteristics of the coating materials, adhesives and sealants.
- the radiation energy acting on the applied coating materials, adhesives and sealants and / or the wavelength of the NIR radiation can be caused by electrical radiation IS
- the irradiation with UV radiation and / or electron radiation has no special features in terms of method and apparatus, but rather the usual and known devices and radiation doses are used.
- a dose of 1,000 to 2,000, preferably 1,100 to 1,900, particularly preferably 1,200 to 1,800, very particularly preferably 1,300 to 1,700 and in particular 1,400 to 1,600 mJ / cnr is preferably used.
- this hardening can be supplemented with actinic radiation from other radiation sources.
- work is preferably carried out under an inert gas atmosphere. This can be ensured, for example, by supplying carbon dioxide and / or nitrogen directly to the surface of the relevant layer to be hardened.
- inert gas in order to avoid the formation of ozone.
- the usual and known radiation sources and optical auxiliary measures are used for curing with actinic radiation.
- suitable radiation sources are flash lamps from VISIT, high-pressure or low-pressure mercury vapor lamps, which may be doped with lead to open a radiation window up to 405 nm, or electron beam sources.
- Their arrangement is known in principle and can take into account the conditions of the workpiece and the process parameters are adjusted.
- the areas (shadow areas) which are not directly accessible to radiation, such as cavities, folds and other undercuts due to construction can be combined with point, small area or all-round emitters, combined with an automatic movement device for irradiating cavities or Edges to be (partially) cured.
- the curing can take place in stages, i. H. by multiple exposure or exposure to actinic radiation. This can also take place alternately, i. that is, curing alternately with UV radiation and electron radiation.
- the resulting coatings, adhesives and seals according to the invention can also be post-treated with NIR radiation and / or heat.
- the coating materials, adhesives and sealants to be used in the process according to the invention contain at least one constituent (A) which, on statistical average, has at least one, preferably at least two, group (s) (a) with at least one bond (s) per molecule which can be activated with actinic radiation having.
- a bond which can be activated with actinic radiation is understood to mean a bond which, when irradiated with »?
- actinic radiation becomes reactive and enters into other activated bonds of its kind, polymerization reactions and / or crosslinking reactions which take place according to radical and / or ionic mechanisms.
- suitable bonds are carbon-hydrogen single bonds or carbon-carbon, carbon-oxygen, carbon-nitrogen, carbon-phosphorus or carbon-silicon single bonds or double bonds.
- bonds are suitable which can enter into photoreactions which take place according to hydrogen-emitting mechanisms, such as reactions of the Norrish-B type.
- the carbon-carbon double bonds are particularly advantageous and are therefore used with very particular preference according to the invention. For the sake of brevity, they are referred to below as "double bonds".
- group (a) preferred according to the invention contains one double bond or two, three or four double bonds. Be more than one
- Double bond used the double bonds can be conjugated.
- component (A) contains at least one group (a) on average.
- functionality of component (A) is an integer, that is, for example, one, two, three, four, five or more, or is not an integer, that is, for example, is 1.1 to 10.5 or more. Which functionality you choose depends, on the one hand, on the stoichiometric ratios of the starting products of the constituents (A), which, on the other hand, is again based on their application purposes. If more than one group (a) is used per molecule on average, the at least two groups (a) are structurally different from one another or of the same structure.
- Suitable groups (a) are (meth) acrylate, ethacrylate, crotonate, cinnamate, vinyl ether, vinyl ester, dicyclopentadienyl, norbornenyl, isoprenyl, isopropenyl, allyl or butenyl groups; Dicyclopentadienyl, norbornenyl, isoprenyl, isopropenyl, allyl or butenyl ether groups or dicyclopentadienyl, norbornenyl, isoprenyl, isopropenyl, allyl or butenyl ester groups, but especially acrylate groups.
- Component (A) is preferably a solid, because this results in coating materials, adhesives and sealants (1.1) or (1.3) which are particularly good for the process according to the invention.
- the solid can be amorphous, partially crystalline or crystalline. Which variant is used for the method according to the invention depends on the requirements of the individual case.
- the solvent-free or water-free component (A) has a melting interval or a melting point in the temperature range from 40 to 130 ° C. According to the invention, it is also advantageous if the solvent-free or water-free component (A) has a melt viscosity of 50 to 20,000 mPas at 130 ° C.
- groups (a) are over urethane, urea. Allophanate. Ester, ether and / or amide groups bound to the basic structure of component (A). Urethane groups are particularly preferred.
- the following two linking structures I and II can be considered:
- the two linking structures I and II can be present side by side or only one of them.
- structure I is advantageous because of the larger number of starting products available and their comparatively simpler manufacture and is therefore preferably used according to the invention.
- the groups (a) are bound to the basic structure at the end and / or laterally. Which alt of the connection is chosen depends in particular on whether the functional groups in the basic structure with which the starting products of groups (a) are able to react are terminal or lateral. Terminal groups (a) often have a higher reactivity than lateral groups (a) due to the lack of steric shielding and are therefore used with preference. On the other hand, the reactivity of the solid according to the invention can be specifically controlled via the ratio of terminal and lateral groups (a), which is a further particular advantage of the solid to be used according to the invention.
- component (A) is low molecular weight, oligomeric and or polymeric. That is, component (A) is a low molecular compound
- Or component (A) has low molecular weight and oligomeric, low molecular weight and polymeric, oligomeric and polymeric or 10
- low molecular weight, oligomeric and polymeric basic structures In other words, it is a mixture of low molecular weight compounds and oligomers, low molecular weight compounds and polymers, oligomers and polymers or low molecular weight compounds, oligomers and polymers.
- oligomers are understood to mean resins which contain at least 2 to 15 recurring monomer units in their molecule.
- polymers are understood to be resins which contain at least 10 recurring monomer units in their molecule.
- the low molecular weight, oligomeric or polymeric basic structure contains aromatic, cvcloaliphatic and / or ahphatic structures or building blocks or consists of these. It preferably contains or consists of cycloaliphatic and / or ahphatic structures, in particular cycloaliphatic and aliphatic structures.
- aromatic structures are aromatic and heteroaromatic rings, especially benzene rings.
- cycloaliphatic structures are cyclobutane, cyclopentane, cyclohexane, cycloheptane, norbonane, camphane, cyclooctane or tricyclodecane rings, in particular cyclohexane rings.
- Examples of aliphatic structures are linear or branched alkyl chains with 2 to 20 carbon atoms or chains, as result from the (co) polymerization of olefinically unsaturated monomers. 2 /
- the basic structure in particular the oligomeric and / or polymeric basic structure, can also contain olefinically unsaturated double bonds.
- the basic structure in particular the oligomeric and / or polymeric basic structure, is of linear, branched, hyperbranched or dendrimeric structure.
- It can contain multi-bonded, in particular double-bonded, functional groups (b), by means of which the structures or building blocks described above are linked to one another to form the basic structure. These are generally selected so that they do not interfere with the reactions triggered by the NIR radiation or even prevent them completely.
- Suitable functional groups are ether, thioether, carboxylic acid ester, thiocarboxylic acid ester, carbonate, thiocarbonate, phosphoric acid ester, thiophosphoric acid ester, phosphonic acid ester, thiophosphonic acid ester, phosphite, thiophosphite, sulfonic acid ester, amide, amine, Thioamide, phosphoric acid amide, thiophosphoric acid amide, phosphonic acid amide,
- the ether, carboxylic acid ester, carbonate, carboxylic acid amide, urea, urethane, imide and carbonate groups, especially the carboxylic acid ester and urethane groups, are advantageous and are therefore used with preference.
- Advantageous oligomeric and polymeric basic structures are thus derived from random, alternating and / or block-like linear, branched, hyperbranched, dendrimeric and / or comb-like (co) polymers of ethylenically unsaturated monomers, polyaddition resins and / or polycondensation resins.
- These terms are supplemented by Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998, page 457: »Polyaddition « and »Polyadditionharze (Polyadducts) «, as well as pages 463 and 464:» Polycondensates «,» Polycondensation «and» Polycondensation Resins «.
- Examples of highly suitable (co) polymers are poly (meth) acrylates and partially saponified polyvinyl esters.
- polyesters examples include polyesters, alkyds, polyurethanes, polyester polyurethanes, polylactones, polycarbonates, polyethers, polyester polyethers, epoxy resin-amine adducts, polyureas, polyamides or polyimides.
- polyesters, polyester-polyethers, polyurethanes and polyester-polyurethanes are particularly advantageous and are therefore used with very particular preference in accordance with the invention.
- the basic structure can carry lateral reactive functional groups (c), which can undergo thermally initiated crosslinking reactions with reactive functional groups (c) of their own type or with other, complementary, functional groups (d).
- the complementary functional groups (c) and (d) can be present in one and the same basic structure, which is the case with so-called self-crosslinking systems.
- the functional groups (d) can, however, also be present in a further constituent which differs materially from the solid according to the invention, for example a crosslinking agent (C), which is the case with so-called externally crosslinking systems.
- C crosslinking agent
- Reactive functional groups (c) and (d) are used in particular when component (A) is also to be thermally curable (dual cure). They are selected so that they do not interfere with the polymerization or crosslinking reaction of the double bonds of groups (a) triggered by the NIR radiation and the actinic radiation, or not at all completely prevent. However, reactive functional groups (d) and (e) which add to olefinically unsaturated double bonds can be used in minor, ie in non-interfering, quantities.
- variable R stands for an acyclic or cyclic aliphatic, an aromatic and or an aromatic-aliphatic (araliphatic) radical; the variables R 1 and R 2 stand for identical or different aliphatic radicals or are linked to one another to form an aliphatic or heteroaliphatic ring.
- reactive complementary groups (c) and / or (d) are also used, they are preferably contained in component (A) in an amount corresponding to a statistical average of 1 to 4 groups per molecule.
- the basic structure can furthermore contain chemically bound stabilizers (e). If they are used, they are in component (A) in an amount of 0.01 to 1.0 mol%, preferably 0.02 to 0.9 mol%, preferably 0.03 to 0.85 mol %, particularly preferably 0.04 to 0.8 mol%, very particularly preferably 0.05 to 0.75 mol% and in particular 0.06 to 0.7 mol%, in each case based on those in the constituent ( A) existing double bonds.
- the chemically bound stabilizer (e) is a compound which is or provides sterically hindered nitroxyl radicals (> N-O «) which trap free radicals in the modified Denisov cycle.
- Suitable chemically bound stabilizers are HALS compounds, preferably 2,2,6,6-tetraalkylpiperidine derivatives, in particular 2,2,6,6-tetramethylpiperidine derivatives, the nitrogen atom of which is substituted by an oxygen atom, an alkyl group, alkylcarbonyl group or alkyl ether group.
- HALS compounds preferably 2,2,6,6-tetraalkylpiperidine derivatives, in particular 2,2,6,6-tetramethylpiperidine derivatives, the nitrogen atom of which is substituted by an oxygen atom, an alkyl group, alkylcarbonyl group or alkyl ether group.
- suitable starting products (e) for the introduction of the chemically bound stabilizers (f) are HALS compounds, preferably 2,2,6,6-tetraalkylpiperidine derivatives, in particular 2,2,6,6-tetramethylpiperidine derivatives, the nitrogen atom of which contains an oxygen atom, one Alkyl group, alkylcarbonyl group or alkyl ether group is substituted and which contain an isocyanate group or an isocyanate-reactive functional group (c) or (d), in particular a hydroxyl group.
- An example of a particularly suitable starting product (s) is the nitroxyl radical 2,2,6,6-tetramethyl-4-hydroxy-piperidine-N-oxide.
- the production of the basic structures to be used according to the invention has no special features in terms of method. but takes place with the help of the usual and known Synchhesemethods of low molecular weight organic chemistry and or polymer chemistry.
- the oligomeric and / or polymeric basic structures which are particularly preferred according to the invention and which are derived from polyesters, polyester-polyethers, polyurethanes and polyester-polyurethanes, but in particular from polyurethanes and polyester-polyurethanes, the usual and known methods of polyaddition and / or polycondensation applied.
- Adhesives and sealants contain at least one photo initiator (B).
- suitable photo initiators (B) are described in Römpp Chemie Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998. "Photo initiators", pages 444 to 446.
- the photoinitiators (B) can be used in customary and known amounts, for example in the amounts as described in the European patent applications EP 0 928 800 A1, 0 636 669 A1, 0 410 242 A1, 0 783 534 A1 , 0 650 978 A 1, 0 650 979 A 1, 0 650 985 A 1, 0 540 884 A 1.
- Adhesives and sealants can also contain at least one crosslinking agent
- Crosslinking agents (C) for thermal curing are aminoplast resins.
- So-called one-component systems result when less reactive crosslinking agents (C) are contained in the coating materials, adhesives and sealants from the start.
- the type and amount of the crosslinking agent (C) depend primarily on the complementary reactive groups (c) contained in the constituents (A) and their number.
- the coating materials, adhesives and sealants used in the process according to the invention may also contain at least one additive (D) which is selected from the group consisting of color and / or effect pigments, organic and inorganic, transparent or opaque fillers, nanoparticles, Reactive diluents curable thermally and / or with actinic radiation, low organic solvents and high-boiling organic solvents ("long solvents"), water, UV absorbers, light stabilizers, radical scavengers, thermolabile radical initiators, catalysts for thermal crosslinking, photoinitiators, venting additives, slip agents Polymerization inhibitors, defoamers, emulsifiers, wetting agents and dipergi, adhesion promoters, leveling agents, film-forming aids, sag control agents (SCA), rheology-controlling additives (thickeners), flame retardants, siccatives, drying agents, skin prevention agents, corrosion inhibitors, waxes and matting agents.
- D additive
- the process according to the invention is used to produce primers, filler coatings, stone chip protection primers,
- the coating material in question contains coloring and / or effect pigments (D) and optionally opaque fillers.
- D coloring and / or effect pigments
- the method according to the invention enables complete crosslinking of the pigmented coating materials in question, despite their z. T. high pigment content. This represents a further particular advantage of the process according to the invention. If the process according to the invention is used, for example, to produce clearcoats, these additives (D) are naturally not present in the coating material in question.
- suitable effect pigments (D) are metal plate pigments such as commercially available aluminum bronzes, aluminum bronzes chromated according to DE-A-36 36 183, and commercially available stainless steel bronzes and non-metallic effect pigments, such as pearlescent or interference pigments.
- metal plate pigments such as commercially available aluminum bronzes, aluminum bronzes chromated according to DE-A-36 36 183, and commercially available stainless steel bronzes and non-metallic effect pigments, such as pearlescent or interference pigments.
- suitable inorganic color pigments (D) are titanium dioxide, iron oxides, Sicotrans yellow and carbon black.
- suitable organic coloring pigments (D) are thioindigo pigments indanthrene blue, cromophthal red, irgazine orange and heliogen green.
- Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, 1998 pages 180 and 181, "Iron blue pigments” to "Iron oxide black", pages 451 to 453 "Pigments” to “Pigment volume concentration”, page 563 "Thioindigo pigments" and page 567 "Titanium dioxide pigments”.
- Suitable organic and inorganic fillers (D) are chalk, calcium sulfates, barium sulfate, silicates such as talc or kaolin, silicas, oxides such as aluminum hydroxide or magnesium hydroxide or organic fillers such as textile fibers, cellulose fibers, polyethylene fibers or wood flour.
- silicas oxides such as aluminum hydroxide or magnesium hydroxide
- organic fillers such as textile fibers, cellulose fibers, polyethylene fibers or wood flour.
- thermally curable reactive diluents are positionally isomeric diethyloctanediols or hydroxyl group-containing hyperbranched compounds or dendrimers.
- Suitable reactive thinners (D) curable with actinic radiation are those described in Römpp Lexikon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, New York, 1998, on page 491 under the keyword “reactive thinners”.
- Suitable low-boiling organic solvents (D) and high-boiling organic solvents (D) (“long solvents”) are ketones such as methyl ethyl or methyl isobutyl ketone, esters such as ethyl acetate or butyl acetate, ethers such as dibutyl ether or ethylene glycol, diethylene glycol, propylene glycol, dipropylene glycol Butylene glycol or
- suitable light stabilizers (D) are HALS compounds, benzotriazoles or oxalanilides.
- thermolabile free radical initiators (D) are organic peroxides, organic azo compounds or C-C-cleaving initiators such as dialkyl peroxides, peroxocarboxylic acids, peroxodicarbonates, peroxide esters. Hydroperoxides, ketone peroxides, azodinitriles or benzpinacol silyl ethers.
- Suitable catalysts (D) for crosslinking are dibutyltin dilaurate, lithium decanoate or zinc octoate.
- D deaerating agent
- emulsifiers (D) are nonionic emulsifiers, such as alkoxylated alkanols and polyols, phenols and alkylphenols or anionic emulsifiers, such as alkali metal salts or ammonium salts of alkane carboxylic acids, alkane sulfonic acids, and sulfonic acids of alkoxylated alkanols and polyols. Phenols and alkylphenols.
- Suitable wetting agents (D) are siloxanes, fluorine-containing compounds. Carboxylic acid esters, phosphoric acid esters, polyacrylic acids and their copolymers or polyurethanes.
- An example of a suitable adhesion promoter (D) is tricyclodecanedimethanol.
- Suitable film-forming aids (D) are cellulose derivatives.
- Suitable transparent fillers (D) are those based on silicon dioxide, aluminum oxide or zirconium oxide; in addition is still on the Römpp Lexicon Lacke und Druckmaschine, Georg Thieme Verlag, Stuttgart, 1998, pages 250 to 252.
- Sag control agents (D) are ureas, modified ureas and / or silicas, as described, for example, in references EP-A-192 304, DE-A-23 59 923, DE-A-18 05 693, WO 94 / 22968, DE-C-27 51 761, WO 97/12945 or "färbe + lack", 11/1992, pages 829 ff.
- rheology-controlling additives are those known from the patents WO 94/22968, EP-A-0 276 501, EP-A-0 249 201 or WO 97/12945; crosslinked polymeric microparticles, such as are disclosed, for example, in EP-A-0 008 127; inorganic layered silicates such as aluminum-magnesium-silicates, sodium-magnesium and sodium-magnesium-fluorine-lithium layered silicates of the montmorillonite type; Silicas such as aerosils; or synthetic polymers with ionic and / or associative groups such as polyvinyl alcohol, poly (meth) acrylamide, poly (meth) acrylic acid, polyvinyl pyrrolidone, styrene-maleic anhydride or ethylene-maleic anhydride copolymers and their derivatives or hydrophobically modified ethoxylated urethanes or polyacrylates;
- An example of a suitable matting agent (D) is magnesium stearate.
- additives (D) listed above examples of suitable UV absorbers, radical scavengers, leveling agents,
- the production of the coating materials, adhesives and sealants has no special features, but is carried out in a customary and known manner by mixing the constituents (A) and (B) described above and, if appropriate, (C) and (D) in suitable mixing units such as stirred kettles, dissolvers, Agitator mills or extruders using the sealing compounds (1.1), (1.2), (1.3), (1.4) or (1.5) suitable for the production of the respective coating materials, adhesives.
- the coatings produced with the aid of the process according to the invention are what color, effect, gloss and D.O.I. (distinctiveness of the reflected image), of the highest optical quality, have a smooth, structure-free, hard, flexible and scratch-resistant surface, are odorless and weather, chemical and etch-resistant, do not yellow and show no cracking and delamination of the layers ,
- the adhesive layers and seals produced with the aid of the method according to the invention have a long service life and high adhesive strength or sealability even under extreme climatic conditions.
- the primed or unprimed substrates which have been provided with at least one coating, adhesive layers and / or sealant in the procedure according to the invention, therefore have a particularly long service life and a particularly high utility value, which makes them technically and economically particularly attractive for manufacturers, users and end users makes. Examples and comparative tests
- leveling aid BYK® 361 from Byk Chemie
- photoinitiator Irgacure® D 2954 from Ciba Specialty Chemicals
- the ingredients were premixed and homogenized in a laboratory extruder at 120 ° C. After the melt had been discharged and cooled, the solidified melt was ground and reduced to a grain size of max. 70 ⁇ m sieved.
- the resulting UV-curable powder coating was sprinkled on test panels made of MDF (medium density fiber board; fiberboard; example 1 and comparative experiment VI) and MSP (furniture chipboard; example 2 and comparative experiment V2) with a sieve.
- the test plates were placed on a balance and so much powder was applied that a layer thickness of 80 ⁇ m resulted after melting.
- a laboratory continuous system from IST which was equipped with two UV lamps of the type M400-U2H, was used for the UV exposure. In all examples and comparative tests, the throughput speed was 10 m / min.
- IR emitter from Elstein. Model IR 2000, emission maximum at 5,000 nm
- IR emitter from Elstein. Model IR 2000, emission maximum at 5,000 nm
- NIR emitter NIR emitter from IdustrieService, model MPP 120-0, emission maximum at 850 nm
- results obtained in comparative experiments VI and V2 can be found in table 1.
- results obtained in examples 1 and 2 can be found in table 2.
- the comparison of the results underpins that the coatings produced in the process according to the invention are those obtained in a conventional manner by far outperform in quality.
- the results confirm that only the process according to the invention protects the substrates and the lacquer layers.
- Table 2 The production of coatings in the procedure according to the invention (Examples 1 and 2)
- V2 45 130 not very small
- the temperature could be set using the NIR lamp. It was reached after 20s and held by regulating the lamp.
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- General Health & Medical Sciences (AREA)
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- Application Of Or Painting With Fluid Materials (AREA)
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Abstract
Description
Claims
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Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001094029A3 (de) * | 2000-06-02 | 2002-04-25 | Goetz-Ekkehard Sapper | Farb- und/oder effektgebende ein- oder mehrschichtlackierung für metallische substrate auf der basis von eisen |
WO2002090001A3 (en) * | 2001-05-09 | 2003-12-24 | Du Pont | Process for coating substrates using nir curing |
WO2003074193A3 (de) * | 2002-03-01 | 2003-12-04 | Advanced Photonics Tech Ag | Verfahren und vorrichtung zur herstellung einer oberflächenbeschichtung durch nir- und uv-nachbehandlung |
WO2003074199A3 (fr) * | 2002-03-06 | 2004-03-11 | Solaronics Technologies | Procede de photopolymerisation d'un revetement polymerisable, installation pour la mise en oeuvre de de procede et produit portant un revetement obtenu |
WO2004018114A3 (en) * | 2002-08-23 | 2004-04-22 | Du Pont | Process for curing powder coatings |
WO2005037451A1 (en) * | 2003-10-21 | 2005-04-28 | Climate Coating Limited | Powder coating procedures |
AU2004203662B2 (en) * | 2003-10-21 | 2007-03-15 | Climate Coating Limited | Powder Coating Procedures |
WO2023053107A1 (en) * | 2021-12-15 | 2023-04-06 | Arcelormittal | Method for managing coating gloss on a coil-coating line |
WO2023111644A1 (en) * | 2021-12-15 | 2023-06-22 | Arcelormittal | Method for managing coating gloss on a coil-coating line |
Also Published As
Publication number | Publication date |
---|---|
WO2001064794A3 (de) | 2002-03-14 |
EP1259571A2 (de) | 2002-11-27 |
DE10009822C1 (de) | 2001-12-06 |
US20030148039A1 (en) | 2003-08-07 |
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