DISPERSION PAINT

Abstract

Presented and described is a dispersion paint containing, in each case based on the total weight of the dispersion paint, a) 1% to 15% by weight of pigment, b) 30% to 60% by weight of filler, c) 1% to 25% by weight of polymer, d) 0.1% to 3.5% by weight of alkali metal alkyl siliconate, e) 25% to 70% by weight of water, wherein the pH of the dispersion paint is from 10 to 12. Also described is a process for producing the dispersion paint. The dispersion paint is suitable for use in interior and/or exterior applications.

Claims

1. A dispersion paint containing, in each case based on the total weight of the dispersion paint, a. 1% to 15% by weight of pigment, b. 30% to 60% by weight of filler, c. 1% to 25% by weight of polymer, d. 0.1% to 3.5% by weight of alkali metal alkyl siliconate, e. 25% to 70% by weight of water, wherein the pH of the dispersion paint is from 10 to 12.

2. The dispersion paint as claimed in claim 1, characterized in that it contains 0.1% to 2% by weight, in particular 0.3% to 2% by weight or 0.5% to 1.5% by weight, in each case based on the total weight of the dispersion paint, of alkali metal alkyl siliconate.

3. The dispersion paint as claimed in claim 1 or 2, characterized in that the alkali metal alkyl siliconate is potassium methyl siliconate.

4. The dispersion paint as claimed in any of the preceding claims, characterized in that the pigment is selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile-tin-zinc, quinacridone, diketopyrrolopyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, color carbon black, iron oxide black, pyrazoloquinazolone, naphthol AS monoazopigment and mixtures thereof.

5. The dispersion paint as claimed in any of the preceding claims, characterized in that the filler is selected from the group consisting of dolomite, barium sulfate, feldspar, quartz, calcium carbonate, mica, kaolin, calcinated kaolin, talc, diatomaceous earth and mixtures thereof.

6. The dispersion paint as claimed in any of the preceding claims, characterized in that the filler is a mixture of at least calcium carbonate and kaolin.

7. The dispersion paint as claimed in any of the preceding claims, characterized in that the pH of the dispersion paint is from 10.5 to 11.5, in particular from 10.5 to 11.4.

8. The dispersion paint as claimed in any of the preceding claims, characterized in that the pH of the dispersion paint remains substantially constant over a period of at least 4 weeks, in particular at least 8 weeks or at least 12 weeks or at least 16 weeks or at least 20 weeks.

9. The dispersion paint as claimed in any of the preceding claims, characterized in that the dispersion paint contains 2 to 23% by weight, in particular 4 to 20% by weight, of polymer in each case based on the total weight of the dispersion paint.

10. The dispersion paint as claimed in any of the preceding claims, characterized in that the polymer contains at least one polymer and/or copolymer based on at least one monomer selected from the group consisting of acrylic acid, acrylic acid derivatives, acrylic acid esters, methacrylic acid, methacrylic acid derivatives, methacrylic acid esters, styrene, styrene derivatives, N-vinylpyrrolidone, acrylonitrile, vinyl acetate, vinyl propionate, ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid esters, ethylenically unsaturated carboxylic acid anhydrides, ethylenically unsaturated carboxylic acid amides and carboxylic acid vinyl esters.

11. The dispersion paint as claimed in any of the preceding claims, characterized in that the dispersion paint contains as further additives dispersants, wetting agents, thickeners, stabilizers, defoamers and/or hydrophobizing agents.

12. A process for producing a dispersion paint as claimed in any of claims 1 to 11, comprising a. providing a composition containing, in each case based on the total weight of the composition, i. 1% to 15% by weight of pigment, ii. 30% to 60% by weight of filler, iii. 1% to 25% by weight of polymer, iv. 0.1% to 3.5% by weight of alkali metal alkyl siliconate, v. 25% to 70% by weight of water, b. dispersing the components recited in a, c. adjusting the pH to a value of 10 to 12.

13. The process as claimed in claim 12, characterized in that the composition contains 0.1% to 2% by weight, in particular 0.3% to 2% by weight or 0.5% to 1.5% by weight, in each case based on the total weight of the composition, of alkali metal alkyl siliconate and/or in that the alkali metal alkyl siliconate is potassium methyl siliconate and/or in that the pigment is selected from the group consisting of titanium dioxide, iron oxide yellow, arylide (monoazo), bismuth vanadate, perinone, rutile-tin-zinc, quinacridone, diketopyrrolopyrrole, iron oxide red, phthalocyanine blue, dioxazine, cobalt blue, ultramarine blue, phthalocyanine green, chromium oxide green, cobalt green, color carbon black, iron oxide black, pyrazoloquinazolone, naphthol AS monoazopigment and mixtures thereof and/or in that the filler is characterized by at least one feature of claims 5 and 6 and/or in that the pH of the dispersion paint is from 10.5 to 11.5, in particular from 10.5 to 11.4, and/or in that the pH of the dispersion paint remains substantially constant over a period of at least 4 weeks, in particular at least 8 weeks or at least 12 weeks or at least 16 weeks or at least 20 weeks and/or in that the composition contains 2% to 23% by weight, in particular 4% to 20% by weight, of polymer in each case based on the total weight of the composition and/or in that the polymer contains at least one polymer and/or copolymer based on at least one monomer selected from the group consisting of acrylic acid, acrylic acid derivatives, acrylic acid esters, methacrylic acid, methacrylic acid derivatives, methacrylic acid esters, styrene, styrene derivatives, N-vinylpyrrolidone, acrylonitrile, vinyl acetate, vinyl propionate, ethylenically unsaturated carboxylic acids, ethylenically unsaturated carboxylic acid esters, ethylenically unsaturated carboxylic acid anhydrides, ethylenically unsaturated carboxylic acid amides and carboxylic acid vinyl esters and/or in that the composition contains as further additives dispersants, wetting agents, thickeners, stabilizers, defoamers and/or hydrophobizing agents.

14. Use of a dispersion paint as claimed in any of claims 1 to 11 for interior and/or exterior applications.

15. Use of alkali metal alkyl siliconates for stabilizing dispersion paints.

Description

EXAMPLES

[0061] Dispersion paints having the following formulations reported in table 1 were produced by mixing the constituents stated in table 1, amounts added being in % by weight in each case.

TABLE-US-00001 TABLE 1 Constituent Formulation A Formulation B Titanium dioxide 6 11 Styrene acrylate (50% by weight in 19 11 water) Potassium methyl siliconate 1 1.5 Calcium carbonate 21.7 32.5 Kaolin 20.8 8 Alkaline compound 0.05 0.5 Defoamer 0.2 0.28 Thickener 0.5 0.75 Wetting agent 0.46 0.3 Water 30.29 34.17 pH 11.3 11.4

[0062] The formulations A and B showed a storage stability of more than 6 months without discolorations and were readily workable. In particular the formulations showed a good workability and after application afforded surfaces having a homogeneous overall impression. After 6 months, formulation A had a pH of 11.3 and formulation B had a pH of 11.4.