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The invention relates to a preparation method of a slow-release solid polycarboxylic acid water reducing agent, which comprises the following steps: pretreating carboxylic acid small monomer containing unsaturated double bond by using amine organic small molecule; and after heating to melt the pretreated unsaturated acrylic small monomer and unsaturated polyethenoxy ether big monomer, dropwisely adding unsaturated ester small monomer to perform mass polymerization reaction under the action of an initiator and a chain-transfer agent in a water-free organic-solvent-free environment. The slow-release solid polycarboxylic acid water reducing agent prepared by the mass polymerization process in the water-free solvent-free environment has the advantages of simple and controllable technique, transportation cost saving, environment friendliness, no pollution and the like, achieves the goal of slow release and keeping the slump for 3-4 hours without loss in concrete, and has wide market application prospects.
The invention relates to a preparation method of a slow-release solid polycarboxylic acid water reducing agent, which comprises the following steps: pretreating carboxylic acid small monomer containing unsaturated double bond by using amine organic small molecule; and after heating to melt the pretreated unsaturated acrylic small monomer and unsaturated polyethenoxy ether big monomer, dropwisely adding unsaturated ester small monomer to perform mass polymerization reaction under the action of an initiator and a chain-transfer agent in a water-free organic-solvent-free environment. The slow-release solid polycarboxylic acid water reducing agent prepared by the mass polymerization process in the water-free solvent-free environment has the advantages of simple and controllable technique, transportation cost saving, environment friendliness, no pollution and the like, achieves the goal of slow release and keeping the slump for 3-4 hours without loss in concrete, and has wide market application prospects.
Preparation method of slow-release solid polycarboxylic acid water reducing agent
2015-05-20
Patent
Electronic Resource
English
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