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Stable emulsions of terpolymer particles are formed by polymerizing ethylene, a vinyl ester monomer such as vinyl acetate, and an alkyl vinyl monomer having from about 3 up to about 24 carbon atoms in an aqueous medium in the presence of a water soluble persulfate initiator, and a nonionic and/or an

Stable emulsions of terpolymer particles are formed by polymerizing ethylene, a vinyl ester monomer such as vinyl acetate, and an alkyl vinyl monomer having from about 3 up to about 24 carbon atoms in an aqueous medium in the presence of a water soluble persulfate initiator, and a nonionic and/or anionic emulsifier. The resulting novel stable emulsions contain particles of ethylene-vinyl ester-alkyl vinyl terpolymer which will provide film coatings of increased flexibility and toughness. Furthermore, the emulsions have excellent compatibility when blended within conventional polish formulations.

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1. A process for producing stable polymer emulsions of polymer particles comprising mixtures of polyethylene and terpolymers of ethylene, a vinyl monomer, selected from the group consisting of vinyl ester monomers of straight and branched chain carboxylic acids and straight and branched chain vinyl

1. A process for producing stable polymer emulsions of polymer particles comprising mixtures of polyethylene and terpolymers of ethylene, a vinyl monomer, selected from the group consisting of vinyl ester monomers of straight and branched chain carboxylic acids and straight and branched chain vinyl alkyl ether monomers, and an alkyl vinyl monomer having molecular weights in the range of from about 7,000 to 40,000 and particle sizes in the range of from about 200 to 1,000 angstroms which includes contacting ethylene, a vinyl monomer, and an alkyl vinyl monomer having from about 3 to about 24 carbon atoms, in an aqueous reaction medium having a pH of about 8.5 to 14.0 at a temperature in the range of from about 60° to 150° C and a pressure in the range of from about 1,400 to 20,000 psi in the presence of a water soluble persulfate initiator and an effective amount of an emulsifier selected from nonionic and anionic emulsifiers and mixtures thereof, wherein said vinyl monomer is present in an amount equal to about 0.5 to 20% by weight based on said aqueous reaction medium and wherein said alkyl vinyl monomer is present in an amount equal to about 0.1 to 10% by weight based on said aqueous reaction medium, to form said emulsion. 2. The product produced by the process of claim 1. 3. The process of claim 1 wherein said vinyl monomer has the structural formula of: ##STR## wherein R 1 is selected from hydrogen and a methyl group and R 2 is selected from straight and branched chain alkyl and acyl groups having from 1 to about 10 carbon atoms, and straight and branched chain alkoxy groups having from 1 to about 10 carbon atoms. 4. The process of claim 3 wherein said vinyl monomer is vinyl acetate. 5. The process of claim 3 wherein said vinyl monomer is ethyl vinyl ether. 6. The process of claim 1 wherein said anionic emulsifiers are selected from alkali metal salts of alkyl aryl sulfonates, salts of saturated fatty acids having from about 12 to about 18 carbon atoms, salts of sulfates of saturated fatty acids having from about 5 to about 18 carbon atoms, and salts of sulfates of ethoxylated saturated fatty alcohols having from about 12 to about 18 carbon atoms and an average number of ethoxy groups between 1 and 5. 7. The process of claim 6 wherein said nonionic emulsifiers are selected from alkyl phenoxy polyoxyethylene ethanols. 8. The process of claim 7 wherein said initiator is present in an amount in the range of from about 0.08 to about 0.55% by weight of said aqueous medium and said emulsifier is present in an amount in the range of from about 1 to about 5% by weight of said aqueous medium. 9. The process of claim 8 wherein said vinyl monomer is vinyl acetate and said alkyl vinyl monomer is octadecene-1. 10. The process of claim 6 wherein said emulsifier is an alkali metal salt of an alkyl benzene sulfonic acid wherein the alkyl group has from about 6 to about 18 carbon atoms. 11. The process of claim 10 wherein said initiator is present in an amount ranging from about 0.1 to about 0.75 percent by weight of said aqueous medium and said emulsifier is present in an amount ranging from about 1 to about 7% by weight of said aqueous medium. 12. The process of claim 11 wherein said vinyl monomer is vinyl acetate and said alkyl vinyl monomer is octadecene-1. 13. The process of claim 1 wherein said emulsifier is a member selected from a group consisting of (1) a salt of a saturated fatty acid having from about 12 to about 18 carbon atoms, (2) a salt of a sulfate of a saturated fatty alcohol having about 12 to 18 carbon atoms, and (3) a salt of a sulfate of an ethoxylated saturated fatty alcohol having about 12 to about 18 carbon atoms and an average number of ethoxy groups between 1 and 5. 14. The process of claim 13 wherein said initiator is present in an amount in the range of from about 0.06 to about 0.75% by weight of said medium and said emulsifier is present in an amount in the range of from about 0.9 to about 9% by weight of said aqueous medium. 15. The process of claim 14 wherein said vinyl monomer is vinyl acetate and said alkyl vinyl monomer is octadecene-1. 16. A stable polymeric emulsion comprising a plurality of emulsified solid particles having molecular weights in the range of from about 7,000 to 40,000, and particle sizes in the range of from about 200 to 1,000 angstroms, emulsion polymerized in the presence of a water soluble persulfate catalyst, said particles comprising polyethylene and a terpolymer of ethylene, a vinyl monomer selected from the group consisting of vinyl ester monomers of straight and branched chain alkyl carboxylic acids and straight and branched chain vinyl alkyl ether monomers, and an alkyl vinyl monomer having from about 3 to about 24 carbon atoms, being suspended in an aqueous medium comprising water and a minor effective amount of an emulsifier selected from anionic emulsifiers, nonionic emulsifiers and mixtures thereof. 17. The emulsions of claim 16 wherein said anionic emulsifiers are selected from alkali metal salts of alkyl aryl sulfonates, salts of saturated fatty acids having from about 12 to about 18 carbon atoms, salts of sulfates of saturated fatty alcohols having from about 12 to about 18 carbon atoms, and salts of sulfates of ethoxylated saturated fatty alcohols having from about 12 to 18 carbon atoms and an average number of ethoxy groups between 1 and 5. 18. The polymeric emulsion of claim 17 wherein said nonionic emulsifiers are selected from alkyl phenoxy polyoxyethylene ethanols. 19. The process of claim 18 wherein said vinyl monomer is vinyl acetate and said alkyl vinyl monomer is octadecene-1. 20. The emulsion of claim 18 wherein said vinyl monomer is ethyl vinyl ether.