A composition for producing slow-release mud-resistant polycarboxylate water reducer
A technology of mud polycarboxylic acid and polycarboxylate series, which is applied in the field of slow-release mud-resistant polycarboxylate-based superplasticizers, and can solve the problem of lack of mud-resistant functional groups, difficulty in achieving mud-resistant effects, and poor performance. Solve the problems of sustained release and other problems to achieve the effect of good fluidity, slump and expansion retention
Active Publication Date: 2017-12-05
GUANGDONG FUTE NEW MATERIALS TECH CO LTD
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Problems solved by technology
[0002] CN104479084A proposes a preparation method of polycarboxylate anti-mud agent, which is synthesized by unsaturated double bond polyoxyethylene ether, unsaturated esters, unsaturated carboxylic acid and initiator at high temperature, without special anti-mud functional group, It is difficult for the product to have an anti-mud effect, and it must be used in combination with other polycarboxylic acids
Although the synergist proposes the concept of the combination of unsaturated ester and cationic unsaturated monomer, it does not solve the slow release well, and the slow release effect is difficult to meet the market demand
[0004] The present invention proposes a composition for producing slow-release mud-resistant polycarboxylate water-reducer. The water-reducer produced by using the composition can solve the problem of soil fluidity and long-term slump and Scalability issues
Method used
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[0026] Table 2 Preparation raw materials and dosage of water reducer 1-3 of composition 1
[0027]
[0028] Table 3 Preparation raw materials and dosage of water reducer 4-7
[0029]
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Abstract
The invention discloses a composition used for producing a slow release anti-mud polycarboxylate-type water reducing agent. The composition is composed of unsaturated ester, a cross-linking agent and a cationic unsaturated monomer. The cross-linking agent contains double unsaturated bonds. The average molecular weight of the cross-linking agent is 400-600 Dalton. The weight ratio of the unsaturated ester to the cross-linking agent to the cationic unsaturated monomer is 35-50:3-7:5-15. The cross-linking agent, with the molecular weight in a specific molecular weight range, containing the double unsaturated bonds is adopted to be matched with the unsaturated ester and the cationic unsaturated monomer, so that the produced water reducing agent achieves net working, the water reducing agent is low in admixture amount, high in water reducing agent, excellent in slump retention ability and insensitive to gravel containing mud.
Description
Technical field: [0001] The invention belongs to the field of concrete admixtures, in particular to the field of water reducers, in particular to a composition for producing slow-release mud-resistant polycarboxylate water reducers. Background technique [0002] CN104479084A proposes a preparation method of polycarboxylate anti-mud agent, which is synthesized by unsaturated double bond polyoxyethylene ether, unsaturated esters, unsaturated carboxylic acid and initiator at high temperature, without special anti-mud functional group, It is difficult for the product to have an anti-mud effect, and it must be used in combination with other polycarboxylic acids. [0003] CN103253886A proposes a polycarboxylate superplasticizer synergist, including low carbon number (C3-C6) fatty alcohol polyoxyethylene ether monomers with terminal double bonds and quaternary ammonium salt cations with terminal double bonds Monomer b and a low-carbon (C3-C10) fatty acid ester with a terminal doub...
Claims
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IPC IPC(8): C04B24/26C04B103/30
CPCC04B24/2694C04B2103/302
Inventor 林震张炜黎锦霞梁晓彤
Owner GUANGDONG FUTE NEW MATERIALS TECH CO LTD