Title:
PRODUCTION OF (METH)ACRYLIC ACID-BASED POLYMER
Document Type and Number:
Japanese Patent JP3874917
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a (meth)acrylic acid-based polymer suitable as a cement dispersant having a stable quality.
SOLUTION: This method for producing a (meth)acrylic acid-based polymer provided with a process 1 for subjecting (meth)acrylic acid and a polyalkyleneglycol monoalkyl ether to an esterification reaction in a molar ratio of 5:1 to 50:1 in the presence of an acid catalyst and a polymerization inhibitor, deactivating the acid catalyst with an alkali agent, and subsequently distilling away the unreacted (meth)acrylic acid to obtain the esterification reaction product containing the (meth)acrylate ester and the unreacted (meth) acrylic acid residue, and with a process 2 for adjusting the esterification product obtained in the process 1 to a pH of 1.5-3.5 and subsequently copolymerizing the (meth)acrylate ester with the unreacted (meth)acrylic acid residue.
Inventors:
Kengo Shibata
Haruya Mino
Haruyuki Sato
Daisuke Hamada
Yoshinao Mitsuno
Haruya Mino
Haruyuki Sato
Daisuke Hamada
Yoshinao Mitsuno
Application Number:
JP2692198A
Publication Date:
January 31, 2007
Filing Date:
February 09, 1998
Export Citation:
Assignee:
Kao Corporation
International Classes:
C08F220/06; C08F220/28; C04B26/06; C08F20/28; (IPC1-7): C08F220/28; C08F220/06
Domestic Patent References:
| JP9328346A | ||||
| JP50092985A | ||||
| JP8225352A | ||||
| JP9086990A | ||||
| JP62106056A |
Attorney, Agent or Firm:
Satoshi Furuya
Kaoru Furuya
Takahiko Mizobe
Shinji Mochida
Kaoru Furuya
Takahiko Mizobe
Shinji Mochida
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