Title:
SHRINKAGE-REDUCING POLYCARBOXYLIC ACID WATER REDUCING AGENT AND PREPARATION METHOD THEREOF
Document Type and Number:
WIPO Patent Application WO/2021/103473
Kind Code:
A1
Abstract:
The present application relates to the technical field of building additives, particularly relates to a shrinkage-reducing polycarboxylic acid water reducing agent and preparation method thereof. The water reducing agent includes a mixed solution of an esterification product, an unsaturated polyoxyethylene ether, an emulsifier, an initiator solution, a chain transfer agent solution, an ester macromonomer, acrylic acid, a shrinkage-reducing functional monomer and an unsaturated sulfonate. The preparation method includes preparation of an esterification product, copolymerization and neutralization, wherein the esterification product is prepared by esterification of cocoanut acid diethanolamide and an unsaturated acid, which has the advantages of low cost and easy operation, and the obtained esterification product is copolymerized with a shrinkage-reducing functional monomer, so that the main chain of the polycarboxylic acid water reducing agent has hydrophilic groups such as amide and shrinkage reducing groups, the prepared polycarboxylic acid water reducing agent has lower surface tension, which effectively reduces drying shrinkage of the concrete, effectively improves internal mechanical properties and strength of the concrete, and has significant application value.
Inventors:
ZHANG XIAOFANG (CN)
SHI YANNA (CN)
FANG YUNHUI (CN)
LIN YANMEI (CN)
GUO YUANQIANG (CN)
ZHU SHAOHONG (CN)
SHI YANNA (CN)
FANG YUNHUI (CN)
LIN YANMEI (CN)
GUO YUANQIANG (CN)
ZHU SHAOHONG (CN)
Application Number:
PCT/CN2020/094400
Publication Date:
June 03, 2021
Filing Date:
June 04, 2020
Export Citation:
Assignee:
KZJ NEW MAT GROUP CO LTD (CN)
International Classes:
C08F283/06; C04B24/16; C08F283/00; C04B103/30
Foreign References:
| CN108047388A | 2018-05-18 | |||
| CN102351999A | 2012-02-15 | |||
| CN110003402A | 2019-07-12 | |||
| CN109970922A | 2019-07-05 | |||
| CN109627396A | 2019-04-16 | |||
| CN109354654A | 2019-02-19 | |||
| CN109575198A | 2019-04-05 | |||
| TWI667262B | 2019-08-01 | |||
| EP1015399B1 | 2003-10-08 |
Attorney, Agent or Firm:
WAYNE INTELLECTUAL PROPERTY AGENCY CO., LTD. (CN)
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