Title:
ポリカルボン酸系減水剤、それを用いたコンクリート組成物
Document Type and Number:
Japanese Patent JP4472812
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To obtain a concrete having a high strength exhibiting property by mixing and using a copolymer containing polyoxyethylene, maleic anhydride and phenyl groups, containing a specified number of mols of oxyethylene units per 1 mol carboxy group and having a specified molecular weight and a polycarboxylic acid copolymer having a specified molecular weight. SOLUTION: In a copolymer (A) having constituent units of formulae I, II and III, (n) is 10-60 and R is a 1-5C alkyl group. A copolymer (B) of formula IV is obtained by copolymerizing a polyoxyethylene monoallyl monomethyl ether and maleic anhydride and carrying out esterification with a polyoxyethylene monoallyl ether. The molecular weights of the copolymers A and B each 5,000-100,000. A polycarboxlic acid type water-reducing agent obtained by blending 30-120 pts.wt. copolymer B with 100 pts.wt. copolymer A is added by 0.1-1 pt.wt. (expressed in terms of solid) to 100 pts.wt. cement and the resultant mixture is kneaded with water, anhydrous gypsum, etc., in a mixer.
Inventors:
Toshio Mihara
Atsushi Sugita
Yoshiharu Watanabe
Kiyoshi Watanabe
Atsushi Sugita
Yoshiharu Watanabe
Kiyoshi Watanabe
Application Number:
JP30521499A
Publication Date:
June 02, 2010
Filing Date:
October 27, 1999
Export Citation:
Assignee:
DENKI KAGAKU KOGYO KABUSHIKI KAISHA
International Classes:
C04B22/06; C04B28/02; C04B22/08; C04B22/10; C04B22/14; C04B24/04; C04B24/06; C04B24/26; C04B28/00; C04B28/04; C08L25/04; C08L29/10; C08L35/00; C04B103/30; C04B103/32
Domestic Patent References:
| JP8034652A | ||||
| JP6048797A | ||||
| JP10279341A | ||||
| JP10045451A | ||||
| JP6271347A |