Maleic acid based copolymer, and its production process and use

Details Maleic acid based copolymer, and its production process and use Maleic acid based copolymer, and its production process and use

1998-01-07

1999-11-30

Hertzog, Ardith

Liquid purification or separation

Processes

Preventing, decreasing, or delaying precipitation,...

210701, 252180, 510247, C02F 510

Patent

active

059936665

ABSTRACT:
A maleic acid-based copolymer is provided which has a weight-average molecular weight of 1,000 to 100,000, a calcium ion-capturability of 300 mgCaCO.sub.3 /g or higher calculated as calcium carbonate, and a clay-dispersibility of 1.2 or higher. Another maleic acid-based copolymer is also provided which has a level of adsorption to clay within the range of 20 to 90% and a calcium ion-stabilization degree constant of 4.0 or larger. These copolymers are obtainable by a process including the steps of: charging maleic acid and/or its salt (A) into a reaction vessel, in such a manner that the concentration of the (A) will be 35% by weight or higher; adding hydrogen peroxide into the vessel after the charging step, in such a manner that the amount of hydrogen peroxide is within the range of 3 to 20% by weight of the (A); and adding a water-soluble ethylenically unsaturated monomer (B) into the vessel after the charging step and within 30 to 500 minutes after initiation of a reaction, in such a manner that the ratio (A)/(B) is within the range of 95/5 to 5/95 in mol ratio, wherein the adding of the monomer (B) is completed 10 to 300 minutes later than completion of the step of adding hydrogen peroxide. The copolymers are used for detergent compositions, inorganic pigment-dispersing agents, water-treating agents and fiber-treating agents.

REFERENCES:
patent: 3624048 (1971-11-01), Blumbergs et al.
patent: 3850832 (1974-11-01), Wegemund et al.
patent: 3865793 (1975-02-01), Bruson et al.
patent: 3887480 (1975-06-01), Rue et al.
patent: 4009110 (1977-02-01), Topfl et al.
patent: 4519920 (1985-05-01), Fukumoto et al.
patent: 4589995 (1986-05-01), Fukumoto et al.
patent: 4600524 (1986-07-01), Cuisia et al.
patent: 4659793 (1987-04-01), Yang
patent: 4740314 (1988-04-01), Kneller
patent: 4871823 (1989-10-01), Billman et al.
patent: 4906397 (1990-03-01), Leighton et al.
patent: 4980088 (1990-12-01), Boeckh et al.
patent: 5055540 (1991-10-01), Hughes et al.
patent: 5064563 (1991-11-01), Yamaguchi et al.
patent: 5135677 (1992-08-01), Yamaguchi et al.
patent: 5175361 (1992-12-01), Denzinger et al.
patent: 5259985 (1993-11-01), Nakanishi et al.
patent: 5298570 (1994-03-01), Tahara et al.
patent: 5733857 (1998-03-01), Yamaguchi et al.

Affiliated with

Also associated with

Rating

Maleic acid based copolymer, and its production process and use does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Maleic acid based copolymer, and its production process and use, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Maleic acid based copolymer, and its production process and use will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1667334