Patent Number: 6,310,030

Title: Unsaturated carboxylic acid polymer, biodegradable builder, and detergent composition

Abstract: Provided are an unsaturated carboxylic acid polymer having a degree of calcium-sequestering ability of at least 150 mg CaCO.sub.3 /g, a degree of 28-day biodegradability of at least 40%, and a number-average molecular weight of from 500 to 1,000,000; a process for producing the unsaturated carboxylic acid polymer by copolymerizing an unsaturated carboxylic acid or its salt with a quinone in the presence of a polymerization initiator; a builder comprising the polymer; a detergent composition comprising the builder and a surfactant; and a dispersant comprising the polymer. The polymer has good calcium ion-sequestering ability and good biodegradability, and is highly useful as a material for builders.

Inventors: Matsuo; Shigeru (Tokuyama, JP), Seino; Yoshikatsu (Tokuyama, JP)

Assignee: Idemitsu Petrochemical Co., Ltd.

International Classification: C08F 20/00 (20060101); C08F 20/04 (20060101); C08F 22/02 (20060101); C08F 22/00 (20060101); C11D 3/37 (20060101); C11D 003/37 (); C08F 022/02 ()

Expiration Date: 10/30/2018