Process for producing and use of maleic acid (co-) polymer salt

Details Process for producing and use of maleic acid (co-) polymer salt Process for producing and use of maleic acid (co-) polymer salt

1990-04-27

1991-11-12

Lieberman, Paul

Compositions

Water-softening or purifying or scale-inhibiting agents

252 80, 252180, 252175, 526240, 526 81, 526 91, 210701, 524804, 562595, C11D 740, C08F 442, C08F 210, C02F 508

Patent

active

050645633

ABSTRACT:
A specially defined amount of hydrogen peroxide is used as a polymerization catalyzer; a specially defined amount and a specially defined kind of a polyvalent metal ion is used; and a specially defined amount of an alkaline substance is used, in order to polymerize a monomer component consisting essentially of only maleic acid, or a monomer component composed of maleic acid and another water-soluble ethylenically unsaturated monomer, in a specially defined proportion in water, whereby a maleic acid polymer salt, preferably a copolymer salt, of improved biodegradability is produced. The maleic acid polymer salt obtained is superior in biodegradability, has a low residual monomer content, and is useful as a detergent builder and as a scale inhibitor, etc.

REFERENCES:
patent: 3635915 (1972-01-01), Gale
patent: 4314044 (1982-02-01), Hughes et al.
patent: 4519920 (1985-05-01), Fukomoto et al.
patent: 4555557 (1985-11-01), Fukumoto
patent: 4589995 (1986-04-01), Fukumoto
patent: 4659793 (1987-04-01), Yang
patent: 4668735 (1987-05-01), Fukumoto et al.
patent: 4709091 (1987-11-01), Fukumoto et al.
patent: 4739008 (1988-04-01), Robinson
Organic Builders, Yukagaku, vol. 35, No. 11, pp. 937-944 (1986).

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