Vinyl acetate copolymer emulsions stabilized by poly(ethylene glycol)-diepoxide adducts
First Claim
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1. In a vinyl acetate based emulsion formed by emulsion polymerizing a monomer system comprising vinyl acetate, thereby forming a vinyl acetate-based polymer, said polymerizing effected in the presence of a stabilizer, the improvement which comprises:
- said emulsion consisting essentially of said vinyl acetate-based polymer,said stabilizer consisting essentially of a condensation product based upon the reaction product of a polyalkylene glycol and a diepoxide, and,said stabilizer is present in the emulsion in an amount of from 1 to 10% by weight of the monomer system.
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Abstract
This invention relates to improved vinyl acetate-based polymers which are formed by emulsion polymerizing vinyl acetate and other comonomers under conditions of free radical polymerization. The improvement resides in the stabilizer system, the stabilizer being a condensation product of a polyol having a weight average molecular weight of from 500 to 10,000 reacted with a diepoxide. An example is the reaction product of polyethylene glycol and the diglycidyl ether of Bisphenol A.
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9 Claims
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1. In a vinyl acetate based emulsion formed by emulsion polymerizing a monomer system comprising vinyl acetate, thereby forming a vinyl acetate-based polymer, said polymerizing effected in the presence of a stabilizer, the improvement which comprises:
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said emulsion consisting essentially of said vinyl acetate-based polymer, said stabilizer consisting essentially of a condensation product based upon the reaction product of a polyalkylene glycol and a diepoxide, and, said stabilizer is present in the emulsion in an amount of from 1 to 10% by weight of the monomer system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a vinyl acetate based emulsion formed by emulsion polymerizing a monomer system comprising vinyl acetate, thereby forming a vinyl acetate-based polymer, said polymerizing effected in the presence of a stabilizer, the improvement which comprises a stabilizer consisting essentially of a condensation product based upon the reaction product of a polyalkylene glycol and a diepoxide, said stabilizer represented by the formula:
- ##STR4## where n=ca. 150-200 and m=ca. 1 to yield a total weight average molecular weight of approximately 17,500 g/mole and the emulsion consists essentially of said vinyl acetate-based polymer as the polymeric component.
Specification