Transparent impact polystyrene plastics of di-block copolymers
a transparent di-block copolymer of styrene and butadiene is produced which contains 70 to 90 percent of block styrene, or preferably 75 to 85 percent 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.
Latest The Firestone Tire & Rubber Company Patents:
Description
Patent History
Patent number: T967004
Type: Grant
Filed: Aug 2, 1976
Date of Patent: Feb 7, 1978
Assignee: The Firestone Tire & Rubber Company (Akron, OH)
Inventor: Robert Clarence Smith (Warren, OH)
Application Number: 5/710,839
Type: Grant
Filed: Aug 2, 1976
Date of Patent: Feb 7, 1978
Assignee: The Firestone Tire & Rubber Company (Akron, OH)
Inventor: Robert Clarence Smith (Warren, OH)
Application Number: 5/710,839
Classifications
Current U.S. Class:
Material Contains Elemental Alkali Metal, Hydride Thereof, Or Alkali Metal To Carbon Atom Bond (li, Na, K, Rb, Cs, Fr) (526/173);
260/879;
Interpolymerized With Aromatic Hydrocarbon (526/340)
International Classification: C08F23610; C08F 448;
International Classification: C08F23610; C08F 448;