The invention relates to a powdery pigment preparation containing a pigment which is dispersed in an acrylate resin and which is characterized in that the acrylate resin has an average molecular mass Mw ranging from 40000 to 80000 g/mol and is a copolymer comprised of 50 to 65 mol % ethyl methacryla
The invention relates to a powdery pigment preparation containing a pigment which is dispersed in an acrylate resin and which is characterized in that the acrylate resin has an average molecular mass Mw ranging from 40000 to 80000 g/mol and is a copolymer comprised of 50 to 65 mol % ethyl methacrylate, of 30 to 45 mol % butyl methacrylate, and of 0.5 to 5 mol % methacrylic acid. The powdery pigment preparation can be used for dyeing films, particularly those made of polymethyl methacrylate. The films do not have any specks nor holes.
대표청구항▼
The invention claimed is: 1. A colored polymethyl methacrylate film comprising polymethyl methacrylate film colored by a pigment composition, wherein the pigment composition comprises a pigment in dispersion in an acrylate resin, wherein the acrylate resin has an average molar mass Mw of between 40
The invention claimed is: 1. A colored polymethyl methacrylate film comprising polymethyl methacrylate film colored by a pigment composition, wherein the pigment composition comprises a pigment in dispersion in an acrylate resin, wherein the acrylate resin has an average molar mass Mw of between 40 000 and 80 000 g/mol and is a copolymer of from 50 to 65 mol % ethyl methacrylate, from 30 to 45 mol % butyl methacrylate, and from 0.5 to 5 mol % methacrylic acid, wherein colored polymethyl methacrylate film has a thickness of between 5 to 1000 μm. 2. A colored polymethyl methacrylate film as claimed in claim 1, wherein the acrylate resin has an average molar mass Mw between 50 000 and 70 000 g/mol. 3. A colored polymethyl methacrylate film as claimed in claim 1, wherein the acrylate resin is composed of from 55 to 60 mol % ethyl methacrylate, from 35 to 40 mol % butyl methacrylate, and from 1 to 4 mol % methacrylic acid. 4. A colored polymethyl methacrylate film as claimed in claim 1, wherein the butyl methacrylate is n-butyl methacrylate. 5. A colored polymethyl methacrylate film as claimed in claim 1, wherein the weight ratio between the pigment and the acrylate resin is from 70:30 to 30:70. 6. A colored polymethyl methacrylate film as claimed in claim 1, wherein the pigment is selected from the group consisting of a monoazo, disazo, laked azo pigment, azo condensation pigment, benzimidazolone, naphthol, isoindolinone, isoindoline, phthalocyanine, quinacridone, anthanthrone, perylene, perinone, thioindigo, thiazineindigo quinophthalone, dioxazine, diketopyrrolopyrrole pigment and carbon black. 7. A colored polymethyl methacrylate film as claimed in claim 1, wherein the pigment is a nickel titanate, chromium titanate, iron oxide, ultramarine, chromium oxide or titanium dioxide. 8. A colored polymethyl methacrylate film as claimed in claim 1, wherein the pigment composition further comprises a) from 30 to 70% by weight of the pigment; b) from 70 to 30% by weight of the acrylate resin, c) from 0 to 8% by weight of a lubricant, and d) from 0 to 10% by weight of additives, the sum of all components being 100% by weight. 9. A colored polymethyl methacrylate film as claimed in claim 1, wherein the pigment composition further comprises: a) from 45 to 55% by weight of the pigment; b) from 55 to 45% by weight of the acrylate resin, c) from 2 to 4% by weight of a lubricant, and d) from 0 to 1% by weight, of at least one additive, the sum of all components being 100% by weight. 10. A method for coloring the colored polymethyl methacrylate film as claimed in claim 1, comprising the step of adding the pigment composition to the polymethyl methacrylate during the production of the polymethyl methacrylate film.
Harris, Jerome Michael; Eichman, Henry Jude; Jamasbi, Homayoun; Lorah, Dennis Paul; Friel, John Michael, Method of improving viscosity stability upon addition of an aqueous tinting composition.
Domingo Manuel J. (Barcelona ESX) Hasler Rolf (Riehen CHX) Robinson Tibor (Basel CHX) Sanahuja Viktor (Reinach CHX), Pigments, their production and use.
Delphin Walter H. (Germantown TN) Hutchins Clyde S. (Arlington TN) Buchacek Robert J. (Hockessin DE), Process for manufacture of polymethyl methacrylate sheet with controlled color.
Palacin Francis (Riedisheim FRX), Process for reactive dyeing a cellulose-containing textile material with anionic dyeing assistant as levelling agent.
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