Acrylic acid-maleic acid copolymer (or its salt), its production process and use, and production process for aqueous maleic salt solution with low impurity content

• Main Authors: ISHIDA TAMAO, YAMAGUCHI SHIGERU, MAEDA YOSHIHIRO
• Format: Patent
• Language: English
• Published: 03.09.2002
• Edition: 7
• Subjects: ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES; CANDLES; CHEMISTRY; COMPOSITIONS BASED THEREON; DETERGENT COMPOSITIONS; DETERGENTS; FATTY ACIDS THEREFROM; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; RECOVERY OF GLYCEROL; RESIN SOAPS; SOAP OR SOAP-MAKING; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF SINGLE SUBSTANCES AS DETERGENTS

The present invention provides: an acrylic acid-maleic acid copolymer (or its salt) which is excellent in performances, such as Mg2+ scavengeability, clay dispersibility in the presence of Mg2+, inhibitability upon Mg(OH)2 scale, and inhibitability upon CaCO3 scale; and a production process for such a copolymer (or its salt). The present invention further provides a production process for an aqueous maleic salt solution with a low impurity content which has the advantage of easily giving the above copolymer (or its salt). The present invention still further provides uses of the above copolymer (or its salt) having the above excellent properties.