Search International and National Patent Collections

1. (WO2013145675) COPOLYMER FOR GYPSUM DISPERSANT AND METHOD FOR PRODUCING SAME, GYPSUM DISPERSANT, AND GYPSUM COMPOSITION

Pub. No.:    WO/2013/145675    International Application No.:    PCT/JP2013/001967
Publication Date: Fri Oct 04 01:59:59 CEST 2013 International Filing Date: Sat Mar 23 00:59:59 CET 2013
IPC: C04B 24/26
C04B 28/14
C08F 290/06
Applicants: NIPPON SHOKUBAI CO., LTD.
株式会社日本触媒
Inventors: KAWAHARA, Washin
河原 和伸
HAYASHIYA, Toshio
林谷 俊男
Title: COPOLYMER FOR GYPSUM DISPERSANT AND METHOD FOR PRODUCING SAME, GYPSUM DISPERSANT, AND GYPSUM COMPOSITION
Abstract:
Provided are: a copolymer for a gypsum dispersant with which it is possible to achieve both improvement of fluidity of a gypsum slurry and shortening of the setting time; and a method for producing the same. This copolymer for a gypsum dispersant comprises a structural unit derived from a monomer (a) represented by general formula (A) and a structural unit derived from a monomer (b) represented by general formula (B), and contains a copolymer with a weight average molecular weight of 1 to 200,000, the amount of elemental sulfur in the copolymer being 0.2 weight% or less with respect to the copolymer.