Modified plastic elastomer block copolymers

Details Modified plastic elastomer block copolymers Modified plastic elastomer block copolymers

1991-01-10

1993-12-21

Schofer, Joseph L.

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

Synthetic resins

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

5253333, 5253335, 525346, 525353, 5253593, C08F29300

Patent

active

052722155

ABSTRACT:
A thermoplastic elastomeric block copolymer comprising olefin elastomeric mid block units and terminal polystyrene units having substitution in an amount sufficient to raise the glass transition temperature of the polymer. The substitution comprises cycloaliphatic or aromatic acylation and the acylation substitution is accomplished by reaction of an acylhalide with the copolymer in the presence of a catalytic amount of triflic acid.

REFERENCES:
patent: 2500082 (1950-10-01), Lieber et al.
patent: 4677153 (1987-06-01), Kitahara et al.
patent: 4952648 (1990-08-01), Yamaguchi et al.
patent: 5110876 (1992-05-01), Harwood et al.

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