Polymers with controlled sulfonic acid or sulfonate group conten

Details Polymers with controlled sulfonic acid or sulfonate group conten Polymers with controlled sulfonic acid or sulfonate group conten

1978-11-06

1981-01-06

Henderson, C. A.

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

Synthetic resins

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

260 174R, 525326, 525329, 526273, 526287, C08F 836

Patent

active

042437725

ABSTRACT:
A two step process for the preparation of polymers which contain an easily controllable amount of sulfonate groups. In the first step, a copolymerization or a graft copolymerization is carried out using a controlled amount of an epoxy group containing monomer, said monomer being an ester of 2,3-epoxy propyl alcohol and acrylic acid. In a second step, the epoxy groups of the polymer prepared in the first step are, via ring opening reaction, partially or fully sulfonated by means of sulfite ions in aqueous solution in the presence of a quaternary ammonium salt as a catalyst.

REFERENCES:
patent: 3541059 (1970-11-01), Schaper
patent: 3579565 (1971-05-01), Zaslowsky
patent: 3784525 (1974-06-01), Baumann
patent: 3852256 (1974-12-01), Parker

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