Method of producing hard polyvinyl alcohol gel

Details Method of producing hard polyvinyl alcohol gel Method of producing hard polyvinyl alcohol gel

1986-06-24

1988-02-16

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...

5253306, C08F 800, C08F 812, C08F 1606

Patent

active

047256460

ABSTRACT:
Hard polyvinyl alcohol gel is produced by copolymerizing a carboxylic acid vinyl ester monomer with a particular cross-linking agent and then saponifying the copolymer. This hard polyvinyl alcohol gel has excellent mechanical strength and separation ability and has no problem in copolymerizability and polymerization speed. Moreover, it shows no change in cross-linked structure before and after saponification.

REFERENCES:
patent: 2462817 (1949-02-01), Smith
patent: 3925327 (1975-12-01), Mitsushima et al.
patent: 3956244 (1976-05-01), Carpenter
patent: 3972865 (1976-08-01), McClair et al.
Chem. Abstracts vol. 89, enty 181322n, Aug. 78.

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