Transparent impact polystyrene plastics of multiple block copolymers

A transparent copolymer of butadiene and styrene of the BSBS type is produced which contains 60 to 90 per cent of block styrene, or preferably 70 to 85 per cent of block styrene. The copolymer is suitable for use in the manufacture of packaging films and molded items, including egg cartons, boxes of various types, window panes, etc.

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Description
Patent History
Patent number: T953011
Type: Grant
Filed: Nov 7, 1975
Date of Patent: Dec 7, 1976
Assignee: The Firestone Tire & Rubber Company (Akron, OH)
Inventor: Robert C. Smith (Warren, OH)
Application Number: 5/629,746
Classifications
Current U.S. Class: 260/880B
International Classification: C08L 906;