Water-based paint composition for aerosol cans

Abstract

The invention relates to a water-based paint composition for aerosol cans containing A) 55 to 75% w/w of a paint component, which contains 40 to 75% w/w, with respect to the paint component, of an acrylate-based film-forming formulation in an aqueous medium, up to 10% w/w of a water-miscible polar solvent, up to 30% w/w of customary pigments, up to 15% w/w of matting agents, 2 to 15% w/w of additives, and up to 40% w/w of added water, and B) 25 to 45% w/w of a propellant gas component which, based on the propellant gas component, contains at least 75% w/w of dimethyl ether.

Claims

1. Water-based paint composition for aerosol cans containing A) 55 to 75% w/w of a paint component, which contains 40 to 75% w/w, with respect to the paint component, of an acrylate-based film-forming formulation in an aqueous medium, the film-forming formulation having a solids content of between 40 and 50% w/w and containing a styrene acrylate copolymer of less than 30% w/w which is present in a colloidal aqueous dispersion or as core-shell structure, up to 10% w/w of a water-miscible polar solvent, up to 30% w/w of pigments, up to 15% w/w of matting agents, 2 to 15% w/w of additives, and up to 40% w/w of added water, and B) 25 to 45% w/w of a propellant gas component which, based on the propellant gas component, contains at least 75% w/w of dimethyl ether.

2. Water-based paint composition according to claim 1, characterized in that the acrylate based film-forming agent of the paint component has a minimum film forming temperature MFT ranging between 5 and 60° C.

3. Water-based paint composition according to claim 2 in which the film-forming agent of the paint component has a minimum film forming temperature MFT ranging between 20 and 45° C.

4. Water-based paint composition according to claim 1, characterized in that the proportion of water-miscible polar solvents amounts to less than 6% w/w of the paint component.

5. Water-based paint composition according to claim 1, characterized in that the water-miscible polar solvents are alcohols.

6. Water-based paint composition according to claim 5, characterized in that the alcohols are C2 to C4 alcohols, glycols, diglycols or monoethers of glycols or diglycols with C1 to C4 alcohols.

7. Water-based paint composition according to claim 1, characterized in that the paint component contains defoamers in the amount of between 0.1 and 2.0% w/w.

8. Water-based paint composition according to claim 1, characterized in that the paint component contains thickening and thixotropic agents in the amount of between 0.2 and 4.0% w/w.

9. Water-based paint composition claim 1, characterized by 30 to 40% w/w of propellant gas component.

10. Water-based paint composition according to claim 1, characterized by at least 90% w/w of dimethyl ether in the propellant gas component.

11. Water-based paint composition according to claim 1, characterized in that the propellant gas component consists of dimethyl ether.

12. Water-based paint composition according to claim 1, contained in an aerosol can.

13. A method of using the water-based paint composition of claim 12, comprising applying a coating of the paint as decorative or protective paint.

Description

EXAMPLE 1

(1) A paint component was produced using the following constituents:

(2) TABLE-US-00001 Styrene acrylate copolymer dispersion 60.9% w/w (aqueous dispersion, solids content >40% w/w) Defoaming agent 1.0% w/w (modified polydimethylsiloxane) Wetting agent 0.1% w/w (organically modified polysiloxane) Thickening agent 0.5% w/w (hydrophobically modified ethoxylated urethane) n-propanol 3.0% w/w Dipropylene glycol 3.0% w/w Fully demineralized water 31.5% w/w

(3) The paint component was mixed with dimethyl other in an aerosol can in a ratio by weight of 65:35. A water-based paint composition offering good storage stability was obtained that yielded a paint featuring high gloss and good flowing properties.

EXAMPLES 2 TO 4

(4) The paint components had the following compositions:

(5) TABLE-US-00002 Acrylate copolymer, solids content >40% 55.83% 53.53% 53.53% Defoaming agent 0.24% 0.23% 0.23% Wetting agent 0.18% 0.17% 0.17% n-propanol 1.80% 4.75% 5.35% Dipropylene glycol 1.80% Proglyde DMM 1.20% Texanol 0.60% Thickening agent 0.15% 0.12% 0.12% Fully demineralized water 40.00% 40.00% 40.00%

(6) The above listed paint components were charged in aerosol cans with dimethyl ether in a ratio by weight of 60:40. The blends offered good storage stability (>1 year) and yielded a quickly drying paint of high stability, good flowing properties, and high gloss.

EXAMPLE 5

(7) A paint component was composed as follows:

(8) TABLE-US-00003 Styrene acrylate dispersion in water with 90 parts by weight a solids content of 46% Defoaming agent 0.30 parts by weight Wetting agent 0.20 parts by weight n-propanol 4.0 parts by weight

(9) 73 parts by weight of the above paint component were mixed with 5 parts by weight of XFast red 3855 and 22 parts by weight of water and thus yielded the pigmented paint component. The pigmented paint component was mixed with dimethyl ether as propellant in an aerosol can in a ratio by weight of 65:35.

EXAMPLE 6

(10) A water-based finishing paint, red, matt, was composed as follows:

(11) TABLE-US-00004 Styrene acrylate dispersion in water with 91.5 parts by weight  a solids content of 46% Defoaming agent 0.9 parts by weight Wetting and flow-promoting agent 0.6 parts by weight Thickening agent 0.5 parts by weight n-propanol 4.5 parts by weight Butyl glycol 2.0 parts by weight

(12) 60 parts by weight of the above described paint component were mixed with 5 parts by weight of XFast red 3860, 3.8 parts by weight of a micronized wax, 0.2 parts by weight of precipitated silicic acid, and 31 parts by weight of fully demineralized water.

(13) The pigmented and matted paint component was mixed with dimethyl ether as propellant in an aerosol can in a ratio by weight of 65:35.