Block copolymers of diene having their terminal end blocks of a

Details Block copolymers of diene having their terminal end blocks of a Block copolymers of diene having their terminal end blocks of a

1982-11-17

1984-02-14

Michl, Paul R.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C08F29704

Patent

active

044317778

ABSTRACT:
Block copolymers are prepared having end blocks with random copolymer of styrene and/or alkyl substituted derivatives and alpha-methylstyrene ranges from 1:0.5 to 1:2.5, a central block of a polydiene polymer joins the terminal blocks. The block copolymers contain from 10 to 90 weight percent of polydiene, the remaining portion being of random (alkyl) styrene-alpha-methylstyrene copolymer. The polymers range from medium impact polystyrene type polymer of low polydiene content to thermoplastic elastomers of high polydiene content.

REFERENCES:
patent: 3265765 (1966-08-01), Holden
patent: 4201848 (1980-05-01), Kotani

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