Sulfonated block copolymers

Details Sulfonated block copolymers Sulfonated block copolymers

1992-01-10

1993-08-24

Jagannathan, Vasu S.

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

Synthetic resins

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

5253324, 5253329, 5253335, 525353, 525366, 525370, C08F29704, C08F 836, C08F 844

Patent

active

052390101

ABSTRACT:
A thermoplastic polymer which possesses excellent mechanical properties at both room and elevated temperatures is obtained by reacting an acyl sulfate with a block copolymer composed of at least one conjugated diene block and one alkenyl arene block. The block copolymer is first selectively hydrogenated and thereafter modified by grafting sulfonic acid functional groups primarily in the alkenyl arene blocks. The mechanical properties may be varied and controlled by varying the degree of functionalization (amount of sulfonation), and the degree of neutralization of the sulfonic acid groups to metal sulfonate salts.

REFERENCES:
patent: 3577357 (1971-05-01), Winkler
patent: 3642728 (1972-02-01), Canter
patent: 3870841 (1975-03-01), Makowski et al.
patent: 4127546 (1978-11-01), Lundberg et al.
patent: 4492785 (1985-01-01), Valint, Jr. et al.
patent: 4970254 (1990-11-01), Willis et al.

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