Patent ID: 11958019
Assignee: KURITA WATER INDUSTRIES LTD.
Field: Chemical engineering (Chemistry)
Classification: CPC B  C  Y | IPC B  C

Claim 0:
1. A water treatment chemical for membranes, wherein the water treatment chemical contains a polymer compound having a carboxyl group and a sulfo group,
the polymer compound is a polymer compound has a mass-average molecular weight of 8000 to 15000 represented by the following Formula (1),, in Formula (1), m and n represent molar % of each structural unit, m+n=90 to 100%, n is 10 to 40%, and R is —C(═O)—NH—C(CH3)2—CH2SO3H and/or —CH2OCH2—CH(—OH)—CH2SO3H.