Title:
セメント分散剤
Document Type and Number:
Japanese Patent JP4459492
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a cement dispersant capable of manifesting a stable dispersibility to a hydraulic composition under various production conditions and also capable of ensuring a slump retentively while suppressing hardening retardation. SOLUTION: The cement dispersant contains a copolymer mixture obtained by copolymerizing a specified monomer (A1) such as ethylenically unsaturated carboxylic acid derivative having a polyoxyalkylene group and a specified monomer (A2) such as (meth)acrylic acid and changing molar ratio (A1)/(A2) at least one time in mid-way of reaction or a copolymer mixture salt obtained by neutralizing the copolymer mixture with alkali and a copolymer having a unit derived from a specified ethylenically unsaturated monomer (b1) and a unit derived from an ethylenically unsaturated monocarboxylic acid or dicarboxylic acid ester series monomer (b2) as a structural unit or a copolymer salt obtained by neutralizing the copolymer with alkali.
Inventors:
Daisuke Shiba
Haruyuki Sato
Haruyuki Sato
Application Number:
JP2001300901A
Publication Date:
April 28, 2010
Filing Date:
September 28, 2001
Export Citation:
Assignee:
Kao Corporation
International Classes:
C04B24/26; C04B40/00; C08F216/14; C08F220/04; C08F220/26; C08F290/06; C04B103/32
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| JP9286645A | ||||
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Attorney, Agent or Firm:
Satoshi Furuya
Kaoru Furuya
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa
Kaoru Furuya
Takahiko Mizobe
Shinji Mochida
Yoshitsune Kazumasa