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EP2479040B1 - Procédé de fabrication d'un crayon doté de structures surélevées - Google Patents

Procédé de fabrication d'un crayon doté de structures surélevées Download PDF

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Publication number
EP2479040B1
EP2479040B1 EP12151265.1A EP12151265A EP2479040B1 EP 2479040 B1 EP2479040 B1 EP 2479040B1 EP 12151265 A EP12151265 A EP 12151265A EP 2479040 B1 EP2479040 B1 EP 2479040B1
Authority
EP
European Patent Office
Prior art keywords
photoinitiator
plastic composition
monomer
soft
proportion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP12151265.1A
Other languages
German (de)
English (en)
Other versions
EP2479040A1 (fr
Inventor
Udo Beck
Dr. Gerhard Lugert
Walter Oetter
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Faber Castell AG
Original Assignee
Faber Castell AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Faber Castell AG filed Critical Faber Castell AG
Priority to EP12151265.1A priority Critical patent/EP2479040B1/fr
Publication of EP2479040A1 publication Critical patent/EP2479040A1/fr
Application granted granted Critical
Publication of EP2479040B1 publication Critical patent/EP2479040B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/14—Sheathings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K19/00—Non-propelling pencils; Styles; Crayons; Chalks
    • B43K19/16—Making non-propelling pencils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K23/00—Holders or connectors for writing implements; Means for protecting the writing-points
    • B43K23/008—Holders comprising finger grips
    • A—HUMAN NECESSITIES
    • A45—HAND OR TRAVELLING ARTICLES
    • A45D—HAIRDRESSING OR SHAVING EQUIPMENT; EQUIPMENT FOR COSMETICS OR COSMETIC TREATMENTS, e.g. FOR MANICURING OR PEDICURING
    • A45D40/00—Casings or accessories specially adapted for storing or handling solid or pasty toiletry or cosmetic substances, e.g. shaving soaps or lipsticks
    • A45D40/20—Pencil-like cosmetics; Simple holders for handling stick-shaped cosmetics or shaving soap while in use

Definitions

  • the invention relates to a method for producing a pen, in particular for writing, painting, drawing and cosmetic purposes, protruding from the surface of raised structures.
  • Pins of the type in question comprise a shaft made of materials such as wood, wood composite material, plastic and metal and are optionally coated with a coating, e.g. with a paint coat, coated.
  • the structures are present at least at a longitudinal portion of the pin and serve to increase the grip of the pins. They are for example formed in the manner of nubs and are applied in the form of a flowable plastic material in a desired pattern or grid on the pin surface and then cured. The curing takes place for example by a physical drying. In the case of aqueous polymer compositions, the very long, up to two days drying time is disadvantageous. Although the drying time is shortened in the case of plastic materials based on organic solvents, elaborate measures are required to prevent contamination of the environment with solvent vapors.
  • pins are provided whose structures consist of UV-cured plastic materials.
  • a UV-curable, a photoinitiator-containing plastic mass is applied in flowable form on the pin surface and then irradiated with UV light. The curing takes place within seconds, so that a bleeding of the flowable plastic mass is prevented shortly after its application to the pin surface.
  • the grip of a pen does not arise now only by the mere presence of the structures, it is rather determined to a not inconsiderable degree by the haptic properties of the plastic mass used in their cured or crosslinked state.
  • the object of the invention is therefore to provide a method by means of which raised structures based on urethane-acrylate polymers with improved feel and feel can be produced on a pin.
  • a flowable crosslinkable that is a not yet cured or crosslinked plastic mass is applied to the pin surface, a urethane acrylate oligomer and a crosslinking with this oligomer monomer under UV irradiation, a soft-touch additive and a photoinitiator from the group of bis-acyl-phosphine oxides.
  • a co-photoinitiator from another chemical group is not or only in a lower proportion than the main photoinitiator.
  • the UV radiation forms the corresponding polymer from the urethane-acrylate oligomer and the monomer, initiated by the main and optionally present co-initiator.
  • a soft-touch additive a urethane-acrylate oligomer, a monomer, a photoinitiator or other constituent
  • a soft-touch additive a urethane-acrylate oligomer, a monomer, a photoinitiator or other constituent
  • at least one constituent of the type mentioned is present.
  • two different urethane-acrylate oligomers or several different main photoinitiators from the mentioned group may be present.
  • the percentages given in the claims and elsewhere are by weight.
  • a monomer of the abovementioned type is in liquid form at room temperature and is also referred to as a reactive monomer diluent, since it serves as a solvent. In the process, however, it is incorporated in the course of crosslinking into the resulting polymer molecules.
  • a monofunctional monomer ie containing only one double bond
  • acrylate monomers in particular Trimethylolpropanformalacrylat
  • this proportion can be kept so low that the positive effect of the main photoinitiator is not impaired, if at all, only insignificantly.
  • the soft-touch additives are also present at the end of the crosslinking reaction present on the surface of the raised structures, ie, they partially protrude from the surface of the structures, and can accordingly develop their haptic effect, which is not or not sufficiently the case with the structures of the known pens.
  • a plastic material containing a co-photoinitiator its proportion is preferably limited to a maximum of 75%, in particular to a maximum of 15%, based on the proportion of the main photoinitiator. Especially with the last-mentioned content upper limit, it is ensured in almost all possible co-photoinitiators that the haptic effect based on the presence of the main photoinitiator is essentially achieved.
  • Co-photoinitiators which are particularly advantageous in this sense are those from the group of the alpha-hydroxy ketones, for example, the photoinitiators Irgacure 127, Irgacure 184 and Darocure 1173 available from BASF.
  • the invention is applicable to both pens with painted or unpainted shanks.
  • a corona or plasma treatment of the respective surface may be expedient in order to improve the adhesion of the plastic compound.
  • the flowable UV-curable plastic composition contains 20-98% urethane-acrylate oligomer, 0.1% to 60% monomer, 0.1-30% soft-touch additive and 0.1-30% photoinitiator from the chemical group acyl phosphine oxides.
  • a content of 50% to 65% of the urethane acrylate oligomer and 10% to 25% of the monomer in the plastic composition is particularly preferred since very soft and non-slip structures can be obtained here, especially if the plastic composition Contains 0.5% to 6% of photoinitiator and the content of soft-touch additive is limited to 5% to 20%.
  • soft-touch additives from the group aluminum silicate hollow spheres (Schwarzheder textile works), expanded hollow spheres (Akzo Nobel), polyurethane or acrylate softfeeling beads (Grolman / Dainichiseika) are particularly suitable.
  • Silicone rubber beads Dow Corning
  • micronized plastics shamrock
  • PE polypropylene
  • PE polypropylene
  • PP polypropylene
  • PTFE PTFE
  • PA waxes and their dispersions are particularly suitable.
  • the parentheses are examples of manufacturers / suppliers for the mentioned Softtouch additives indicated.
  • Soft-touch additives in combination with at least one photoinitiator from the group of bis-acyl-phosphine oxides, since these act more on the hardening of the applied mass, so that Softtouch additives have enough time to orient themselves to the surface before it hardens too.
  • the effect of the photoinitiator can be increased by adding a co-initiator, for example Darocure 1173 (BASF), in a proportion of 0.5 to 3%.
  • BASF Darocure 1173
  • the plastic mass may also contain 0% to 40% of colorant, 0% to 60% of filler, 0% to 10% of a rheological additive, 0% to 1% of defoamer and 0% to 10% of other additives.
  • a filler is used to vary the consistency of the plastic mass, the proportion of which is up to 60%.
  • at least one filler from the group kaolin, talc, barium sulfate, titanium white, calcium carbonate and mica is added.
  • the plastic composition may contain colorants, such as organic or inorganic pigments, as well as soluble dyes, wherein preferably an upper content limit of 40% is maintained.
  • a rheological additive may be added, for example to adjust a viscosity suitable for the particular type of application of the flowable plastic compound to the pin surface. In this case, a content range of 0.5% to 3% is preferred.
  • a rheological additive is mainly amorphous silica in question. Foaming during the processing of the plastic mass is prevented or at least reduced by a defoamer.
  • the plastic composition can contain up to 40% of an organic solvent, for example butylglycol acetate, if this is necessary, for example, to achieve a specific viscosity or for other reasons.
  • the solvent evaporates virtually completely from the structures during the crosslinking reaction and / or a subsequent drying step.
  • the attached drawing shows a pin 1 with a pen shank 3 formed, for example, by a wood casing 2.
  • a pen shank 3 formed, for example, by a wood casing 2.
  • pin shank 3 raised structures protruding from the surface 6 are present.
  • These are produced by a flowable plastic composition of the type described above, for example, with the in the in EP 2 110 185 A1 applied device is exposed and exposed to UV radiation. This usually happens at room temperature. To control the viscosity of the plastic mass but can also be heated (up to 60 ° C).
  • nubs With the known device structures can be produced in the form of nubs. Instead of nubs other structures may be applied to the pin surface, for example, extending in the pen longitudinal strip-shaped or any other structures.
  • knob-like structures were obtained by applying an inventive (A), (B), (C) and a known flowable plastic compound (D), (E) to the surface of an aqueous PU-Acrylatlack coated wood pencil and applied to a plastic shaft and crosslinked by UV radiation.
  • Plastic compound E (Example 1D from EP 2110185 A1)

Landscapes

  • Macromonomer-Based Addition Polymer (AREA)
  • Paints Or Removers (AREA)

Claims (15)

  1. Procédé de fabrication d'un crayon, dans lequel on dépose une composition de matière plastique susceptible de s'écouler et pouvant être réticulée par les UV à la surface du crayon et la durcit en l'exposant aux UV, dans lequel la composition de matière plastique contient
    - de 20% à 98% d'un oligomère d'acrylate d'uréthane,
    - de 0,1% à 60% d'un monomère se réticulant à cet oligomère par exposition aux UV,
    - de 0,1% à 30% d'un additif softtouch et
    - de 0,1% à 30% d'un photoamorceur principal du groupe chimique des oxydes de bis-acyl-phosphine et un co-photoamorceur d'un autre groupe chimique n'est pas présent ou n'est présent qu'en une proportion plus petite que le photoamorceur principal.
  2. Procédé suivant la revendication 1,
    caractérisé par l'utilisation d'une composition de matière plastique ayant une proportion de co-photoamorceur représentant au maximum 75% de la proportion du photoamorceur principal.
  3. Procédé suivant la revendication 2,
    caractérisé par l'utilisation d'une matière plastique ayant une proportion de co-photoamorceur représentant au maximum 15% de la proportion du photoamorceur principal.
  4. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise une composition de matière plastique dans laquelle il y a de 0,5% à 6% de photoamorceur principal.
  5. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise comme co-photoamorceur un photoamorceur du groupe des alpha-hydroxycétone.
  6. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise un monomère à fonctionnalité simple.
  7. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise comme monomère un monomère d'acrylate.
  8. Procédé suivant la revendication 7,
    caractérisé par
    l'utilisation de formalacrylate de triméthylolpropane comme monomère d'acrylate.
  9. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise une composition de matière plastique qui contient de 0% à 40% de colorant, de 0% à 60% de charge, de 0% à 10% d'un additif rhéologique, de 0% à 1% d'agent d'antimousse et de 0% à 10% d'autres additifs.
  10. Procédé suivant la revendication 9,
    caractérisé par
    l'utilisation d'une composition de matière plastique contenant de 50% à 65% de l'oligomère d'acrylate d'uréthane et de 10% à 25% du monomère.
  11. Procédé suivant l'une des revendications précédentes,
    caractérisé par
    l'utilisation d'une composition de matière plastique ayant une teneur en additif sofftouch de 5% à 20%.
  12. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    la composition de matière plastique comporte au moins un additif sofftouch du groupe des billes creuses de silicate d'aluminium, des billes creuses expansées, des billettes softfeeling en polyuréthane, des billettes en caoutchouc de silicone, des matières plastiques micronisées, des cires de PE, de PP, de PTFE et de PA, ainsi que des dispersions de ces cires.
  13. Procédé suivant l'une des revendications précédentes,
    caractérisé par
    l'utilisation d'une composition de matière plastique dans laquelle il y a de 0,5% à 3% d'additif rhéologique.
  14. Procédé suivant la revendication 13,
    caractérisé en ce que
    l'additif rhéologique est du dioxyde de silicium amorphe.
  15. Procédé suivant l'une des revendications précédentes,
    caractérisé en ce que
    on utilise une composition de matière plastique contenant jusqu'à 40% d'un solvant organique.
EP12151265.1A 2011-01-19 2012-01-16 Procédé de fabrication d'un crayon doté de structures surélevées Active EP2479040B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP12151265.1A EP2479040B1 (fr) 2011-01-19 2012-01-16 Procédé de fabrication d'un crayon doté de structures surélevées

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP11151411 2011-01-19
EP12151265.1A EP2479040B1 (fr) 2011-01-19 2012-01-16 Procédé de fabrication d'un crayon doté de structures surélevées

Publications (2)

Publication Number Publication Date
EP2479040A1 EP2479040A1 (fr) 2012-07-25
EP2479040B1 true EP2479040B1 (fr) 2013-08-28

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ID=43827975

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Application Number Title Priority Date Filing Date
EP12151265.1A Active EP2479040B1 (fr) 2011-01-19 2012-01-16 Procédé de fabrication d'un crayon doté de structures surélevées

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EP (1) EP2479040B1 (fr)
BR (1) BR102012001252B1 (fr)
DE (1) DE202012012632U1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9394436B2 (en) * 2013-08-26 2016-07-19 Dymax Corporation Form in-place gasket with tack free surface
US11548964B2 (en) 2015-08-07 2023-01-10 Arkema France One-part curable soft feel coatings
TWI682976B (zh) 2016-03-02 2020-01-21 阿科瑪法國公司 雙固化型軟觸感塗層
US20200102472A1 (en) 2017-03-28 2020-04-02 Arkema France Compositions useful for forming soft touch coatings
CN110382631A (zh) 2017-03-28 2019-10-25 阿科玛法国公司 用于形成柔软触感涂覆物的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202005021097U1 (de) * 2005-03-09 2007-03-01 Faber-Castell Ag Stift mit einer Oberflächenbeschichtung
EP2110185B1 (fr) 2008-04-17 2013-06-12 Faber-Castell AG Procédé de production de structures élevées sur la surface d'un crayon
EP2248675A1 (fr) * 2009-05-04 2010-11-10 Faber-Castell AG Crayon, notamment en bois destiné à l'écriture, au dessin et aux cosmétiques

Also Published As

Publication number Publication date
BR102012001252B1 (pt) 2019-12-17
BR102012001252A2 (pt) 2013-07-16
EP2479040A1 (fr) 2012-07-25
DE202012012632U1 (de) 2013-07-03

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