Method for preparing polycarboxylate water reducing agent

A technology of water reducing agent and polycarboxylic acid, which is applied in the field of preparation of polycarboxylate water reducing agent, can solve the problem that it is difficult to take into account plasticity preservation and high water reducing rate, cannot achieve the effect of normal water reducing agent, and cannot meet the requirements of construction. and other problems, to achieve the effect of solving the easy discoloration of light, reducing the damage rate and simplifying the production process
CN102010487AActive Publication Date: 2011-04-13ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
8 Cites 22 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
ANHUI ZHONGTIE ENGINEER MATERIAL SCI & TECH CO LTD
Publication Date
2011-04-13

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a polycarboxylate water reducing agent for a gobi desert environment. The polycarboxylate water reducing agent is mainly prepared by the following steps of: synthesizing poly(ethylene glycol methyl ether) maleic anhydride active macromonomer (PAM) by performing esterification reaction on poly(ethylene glycol methyl ether) (MPEG) and maleic anhydride (MAH) which serve as main raw materials; preparing a terpolymer by copolymerization of the PAM, sodium methallyl sulfonate (MAS) and itaconic acid (ITA) which serve as raw materials by free radicals; and neutralizing the terpolymer with a base solution. The polycarboxylate water reducing agent has excellent performance, such as high water reducing ratio, little cement paste gradual loss, high cost performance and the like, so that the problem that monomer with large activity difference is difficult to control is solved, and the requirement of construction in the gobi desert environment can be met.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of preparation of concrete admixtures, in particular to a preparation method of polycarboxylate water reducer. Background technique

[0002] As the third generation of high-efficiency water reducer, polycarboxylate water reducer has become a new research topic in the field of concrete admixtures at home and abroad because of its high water reducing rate, small slump loss, good adaptability to cement, and environmental protection. direction.

[0003] Recently, the technology of foreign polycarboxylate superplasticizers has developed relatively rapidly, and the control of production processes is relatively mature. According to reports, Japanese polycarboxylic acid products account for more than 70% of the total number of products, and research centers in North America and Europe have also begun to develop and transfer to this direction, while my country is in the stage of research and development, and the comprehensive...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More