Title:
VISCOSITY REDUCTION TYPE CONCRETE POLYCARBOXYLIC ACID WATER-REDUCING AGENT AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/142125
Kind Code:
A1
Abstract:
The present invention relates to a viscosity reduction type concrete polycarboxylic acid water-reducing agent and a preparation method therefor. The preparation method comprises: mixing low-molecular-weight isobutylene alcohol polyoxyethylene polyoxypropylene block polyether, isoamylene alcohol polyoxyethylene ether, and an appropriate amount of water, controlling the temperature to be 40-60°C, and uniformly stirring; respectively dropwise adding a material A consisting of a mixture aqueous solution of an unsaturated carboxylic acid, a functional monomer and a chain transfer agent and a material B consisting of a mixture aqueous solution of the chain transfer agent and a reducing agent, and controlling the dropwise adding time to be 2-4 hours; and after the dropwise adding is finished, curing at 30-50°C for 1-1.5 h, and cooling to obtain the viscosity reduction type polycarboxylic acid water-reducing agent having a solid content of 40%. The water-reducing agent prepared by the present invention is in a liquid state at normal temperature, has stable storage performance, can effectively reduce the viscosity of high-grade concrete, especially a machine-made sand concrete mixture, is beneficial to concrete stirring, transportation and pumping, and is especially suitable for popularization and application of concrete pumping in high-rise and super-high-rise buildings and long-distance concrete transportation.
Inventors:
WANG WENJUN (CN)
WANG DAOZHENG (CN)
XU JIANJUN (CN)
JI YAJUN (CN)
CHEN NAN (CN)
TANG JIAYUAN (CN)
WU YI (CN)
LI BAOCHUAN (CN)
WANG DAOZHENG (CN)
XU JIANJUN (CN)
JI YAJUN (CN)
CHEN NAN (CN)
TANG JIAYUAN (CN)
WU YI (CN)
LI BAOCHUAN (CN)
Application Number:
PCT/CN2021/097841
Publication Date:
July 07, 2022
Filing Date:
June 02, 2021
Export Citation:
Assignee:
JIANGSU NIGAO SCIENCE&TECHNOLOGY CO LTD (CN)
CHANGZHOU ARCHITECTURAL RES INSTITUTEGROUP CO LTD (CN)
CHANGZHOU ARCHITECTURAL RES INSTITUTEGROUP CO LTD (CN)
International Classes:
C08F283/06; C04B24/26; C08F220/06; C08F220/14; C08F220/28
Foreign References:
| CN112724329A | 2021-04-30 | |||
| CN110003401A | 2019-07-12 | |||
| CN104744684A | 2015-07-01 | |||
| CN104193215A | 2014-12-10 | |||
| EP2644578A1 | 2013-10-02 | |||
| JP2017186248A | 2017-10-12 |
Attorney, Agent or Firm:
CHANGZHOU PINYI PATENT AGENCY (GENERAL PARTNERSHIP) (CN)
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