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US 4,141,936 AGranted
High impact strength polymer triblends
AssigneeNational Distillers and Chemical Corporation
InventorErvin G. Pritchett
Life of this patent
Estimating the term…
Abstract
The impact strength of styrene-acrylonitrile copolymer is significantly improved without loss of injection moldability by the addition thereto of ethylene-vinyl acetate copolymer or ethylene-vinyl acetate-vinyl alcohol terpolymer together with a chlorinated polymer such as polyvinyl chloride or chlorinated polyethylene.
Claims22
Compatibilized polymer triblends which comprise:
- a. from about 5 to about 40 pph of at least one resin selected from the group consisting of:
- i. a copolymer of ethylene and vinyl acetate containing from about 25 percent to about 75 percent vinyl acetate, and
- ii. a terpolymer of ethylene, vinyl acetate and the theoretical monomer vinyl alcohol containing from about 20 percent to about 80 percent ethylene, from about 18 percent to about 60 percent vinyl acetate and from about 2 percent to about 20 percent vinyl alcohol;
- b. from about 50 pph to about 95 pph of a copolymer of styrene and acrylonitrile containing from about 15 percent to about 40 percent acrylonitrile;
- and,
- c. from about 0.1 pph to about 40 pph of a chlorinated polyethylene.
3 more elements
Compatibilized polymer triblends which comprise:
- a. from about 5 to about 40 pph of at least one resin selected from the group consisting of:
- i. a copolymer of ethylene and vinyl acetate containing from about 25 percent to about 75 percent vinyl acetate, and
- ii. a terpolymer of ethylene, vinyl acetate and the theoretical monomer vinyl alcohol containing from about 20 percent to about 80 percent ethylene, from about 18 percent to about 60 percent vinyl acetate and from about 2 percent to about 20 percent vinyl alcohol;
- b. from about 50 pph to about 95 pph of a copolymer of styrene and acrylonitrile containing from about 15 percent to about 40 percent acrylonitrile;
- and,
- c. from about 0.1 pph to about 40 pph of a polyvinyl chloride.
3 more elements
Dependencies are inferred from the claim text.