Process for producing highly water absorptive polymer

Details Process for producing highly water absorptive polymer Process for producing highly water absorptive polymer

1983-08-26

1985-02-05

Griffin, Ronald W.

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

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

525 5424, 52623822, 526328, 604372, C08L 3300, C08L 3308

Patent

active

044979304

ABSTRACT:
A highly water absorbent polymer having high resistance to salt solution is prepared by crosslinking a hyrophilic polymer or copolymer having carboxyl and/or carboxylate groups and water content of 10 to 40 wt. % with a crosslinking agent having at least two functional groups capable of reaction with said carboxyl and carboxylate group. An improved hydrophilic polymer is produced by polymerizing a monomer with a persulfate and a hydroperoxide as combined initiators. Another improved hydrophilic polymer is prepared by polymerizing a monomer with a persulfate and adding a hydroperoxide to the resulting polymer.

REFERENCES:
patent: 3847851 (1974-11-01), Tugukuni et al.
patent: 3929741 (1975-12-01), Laskey
patent: 4059552 (1977-11-01), Zweigle et al.
patent: 4093776 (1978-06-01), Aoki et al.
patent: 4135943 (1979-01-01), Morishita et al.
patent: 4179367 (1979-12-01), Barthell et al.
patent: 4367323 (1983-01-01), Kitamura et al.

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