Sulfonated unhydrogenated copolymers of styrene and butadiene

Details Sulfonated unhydrogenated copolymers of styrene and butadiene Sulfonated unhydrogenated copolymers of styrene and butadiene

1992-09-03

1994-02-22

Michl, Paul R.

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

Synthetic resins

Processes of preparing a desired or intentional composition...

524 59, 524 70, 524 71, C08L 2510, C08L 9500

Patent

active

052887731

ABSTRACT:
This invention relates to polymeric compositions comprising unhydrogenated or substantially unhydrogenated sulfonated copolymers of (poly)styrene and a (poly)conjugated diene, e.g., (poly)butadiene or (poly)isoprene, preferably (poly)butadiene containing less than about 1.0 wt. %, preferably less than about 0.8 wt. % sulfur, preferably from about 0.2 to about 0.7, more preferably from about 0.22 to about 0.6 wt. % sulfur, as well as base-neutralized products thereof. The invention includes the polymeric compositions produced by the process of sulfonating unhydrogenated copolymers of (poly)styrene and a conjugated diene, e.g., (poly)butadiene or (poly)isoprene, preferably (poly)butadiene, which process optionally includes base neutralizing the sulfonated copolymer. This invention further relates to the process for making these novel copolymers comprising combining an unhydrogenated or substantially unhydrogenated copolymer of (poly)styrene and a conjugated diene, e.g., (poly)butadiene or (poly)isoprene, preferably (poly)butadiene and an effective amount of sulfonating agent in an amount for a time, temperature and under conditions sufficient to sulfonate the copolymer and, optionally, neutralizing the sulfonated copolymer. This invention uses the copolymers herein in block form, i.e., diblock; (linear or radial) triblock, multiblock.

REFERENCES:
patent: 3642953 (1972-02-01), O'Neill et al.
patent: 4371641 (1983-02-01), Boyer
patent: 4514308 (1985-04-01), Clampitt et al.
patent: 4741868 (1988-05-01), Rooney
patent: 5070123 (1991-12-01), Moran
EP Application No. 93301629.7 Search Report dated Jul. 5, 1993.
EP-A-04412 85, Dow Chemical, Aug. 14, 1991.

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