초록

This invention concerns sprayable, non-foaming emulsions of a film-forming polymer in water which are useful as aerosol paint sprays.

대표청구항 ▼

1. A composition suitable for dispensing from an aerosol container by the action of dimethyl ether propellant comprising an aqueous emulsion of a film-forming polymer, and a propellant amount of dimethyl ether, wherein the film-forming polymer is emulsified by a nonionic surfactant having an HLB val

1. A composition suitable for dispensing from an aerosol container by the action of dimethyl ether propellant comprising an aqueous emulsion of a film-forming polymer, and a propellant amount of dimethyl ether, wherein the film-forming polymer is emulsified by a nonionic surfactant having an HLB value of at least about 14, and said composition when dispensed from an aerosol container provides a smooth and foam-free film on the substrate to which it is applied. 2. The composition according to claim 1 wherein said emulsion comprises about 2 to about 25 parts by weight of film-forming polymer, about 0.3 to about 3.0 parts by weight of said nonionic surfactant, about 0.2 to about 10 parts by weight of a pigment, and dimethyl ether dissolved in said emulsion in the amount of about 10 parts by weight of said emulsion and up to the limit of the solubility of dimethyl ether in said emulsion when said emulsion is subjected to about 40 to about 60 psi dimethyl ether gaseous propellant pressure at room temperature; and said emulsion includes about 2% to about 35% solids. 3. The composition according to claim 2 wherein said emulsion comprises by weight about 3% to about 15% of the film-forming polymer, about 0.2% to about 10% by weight pigment, about 0.5% to about 2.0% surfactant, and about 15% to about 35% by weight dimethyl ether dissolved in said emulsion. 4. The composition according to claim 3 wherein said film-forming polymer is selected from the group consisting of polyethylacrylates, vinyl esters of saturated carboxylic acids, alkyl or aryl esters of unsaturated carboxylic acids, vinyl acetate-ethylene copolymers, vinyl acetate copolymers, and vinyl acetate copolymer latexes. 5. The composition according to claim 4 wherein said emulsion is comprised of a vinyl acetate copolymer latex selected from the group consisting of a latex of 75% vinyl acetate and 25% dibutyl maleate and a latex of 75% vinyl acetate and 25% ethylhexyl acrylate. 6. The composition according to claim 1 or claim 2 wherein said nonionic surfactant is selected from the group consisting of octylphenol-ethylene oxide adducts, nonylphenolethylene oxide adducts and lauryl alcohol-ethylene oxide adducts, and said film-forming polymer is a polyethylacrylate. 7. The composition according to claim 2 wherein said nonionic surfactant is an alkyl-substituted-phenoxy polyoxyethylene ethanol wherein the alkyl group is at least about seven carbon atoms and the ethanoxy groups number at least about 10; or an alkoxy-polyoxyethylene ethanol wherein the ethanoxy groups number at least about 10 and the alkoxy group is of at least about 8 carbon atoms. 8. The composition according to claims 2 or 3 wherein said pigment is calcium carbonate, and said film-forming polymer is a polyethylacrylate. 9. The composition according to claim 1 wherein said emulsion comprises about 77 parts by weight of an aqueous emulsion of polyethylacrylate, about 0.8 parts by weight of a nonionic surfactant which is an octylphenol-ethylene oxide adduct having 40 moles of ethylene oxide per mole of octylphenol, and about 2.0 parts by weight calcium carbonate. 10. An aerosol dispenser containing therein a dispensable composition comprising a film-forming polymer emulsified in an aqueous solution of dimethyl ether, wherein said film-forming polymer is emulsified by a nonionic surfactant having an HLB value of at least about 14 or above, and said emulsion being under dimethyl ether gas propellant pressure in said dispenser sufficient to propel said emulsion from said dispenser and onto the surface of a substrate to provide a smooth and foam-free film on the substrate to which it is applied. 11. The dispenser according to claim 10 wherein said emulsion comprises about 2 to about 25 parts by weight of film-forming polymer, about 0.3 to about 3.0 parts by weight of said nonionic surfactant, about 0.2 to about 10 parts by weight of a pigment, and dimethyl ether dissolved in said emulsion in an amount of about 10 parts by weight of said emulsion and up to the limit of the solubility of dimethyl ether in said emulsion when said emulsion is subjected to about 40 to about 60 psi dimethyl ether gaseous propellant pressure at room temperature; and said emulsion includes about 2% to about 35% solids. 12. The dispenser according to claim 11 wherein said emulsion comprises by weight about 5% to about 15% of the film-forming polymer, about 0.3% to about 10% by weight pigment, about 0.5% to about 2.0% surfactant, and about 15% to about 35% by weight dimethyl ether dissolved in said emulsion. PG,18 13. The dispenser according to claim 12 wherein said film-forming polymer is selected from the group consisting of polyethylacrylates, vinyl esters of saturated carboxylic acids, alkyl or aryl esters of unsaturated carboxylic acids, vinyl acetate-ethylene copolymers, vinyl acetate copolymers, and vinyl acetate copolymer latexes. 14. The dispenser according to claim 10 wherein said emulsion comprises about 77 parts by weight of an aqueous emulsion of polyethylacrylate, about 0.8 parts by weight of nonionic surfactant, and about 2.0 parts by weight calcium carbonate. 15. The composition according to claim 1, 2, 3, 7 or 9 wherein said polymer is an acrylic polymer and said film comprises a paint film. 16. The composition according to claim 1, 2, 3, 7 or 9 wherein said HLB value is in the range of about 14.0 to about 18.9, and said film comprises a paint film. 17. The aerosol dispenser according to claim 10, 11 or 12 wherein said polymer is an acrylic polymer, and said film comprises a paint film. 18. The aerosol dispenser according to claim 10, 11 or 12 wherein said HLB value is in the range of about 14.0 to about 18.9, and said film comprises a paint film. 19. The aerosol dispenser according to claim 10 wherein said emulsion includes a pigment, said nonionic surfactant is selected from the group consisting of octylphenol-ethylene oxide adducts, nonylphenol-ethylene oxide adducts and lauryl alcohol-ethylene oxide adducts, and said film comprises a paint film.