Aqueous solution or dispersion of a styrene/maleic anhydride...

Details Aqueous solution or dispersion of a styrene/maleic anhydride... Aqueous solution or dispersion of a styrene/maleic anhydride...

C - Chemistry, Metallurgy

08

L

400/9307

C08L 25/08 (2006.01) C08F 8/44 (2006.01)

Patent

CA 1161581

HOE 79/F 253 AQUEOUS SOLUTION OR DISPERSION OF A STYRENE/MALEIC ANHYDRIDE COPOLYMER AND PROCESS FOR THE PREPARATION THEREOF Abstract of the disclosure: After hydrolysis and partial neutralization, copoly- mers of styrene and maleic anhydride are soluble or dis- persible in water. Suitable copolymers have a molar ratio of styrene to maleic anhydride in the range of from 1.5:1 to 6:1 and a molecular weight of from 500 to 80,000. Hy- drolysis and neutralization are carried out in the presence of an inorganic neutralizing agent at a temperature of from 75 to 250°C, thus neutralizing from 1 to 50 percent of the carboxyl groups of the corresponding copolymer. The copo- lymer solution or dispersion is suitable especially for stabilizing aqueous dispersions of inorganic or organic substances.

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