Formula of sustained release type polycarboxylic acid series high-performance dehydragent and method for manufacturing same

Abstract

The invention proposes a compounding formula and manufacture method of a sustained release-type polyocarboxy acid high performance water reducing agent. The compounding formula comprises esterification reaction formula and copolymerization reaction formula. The invention combines the esterification reaction and copolymerization reaction into one to carry on after the improvement of the craftwork. The invention utilizing non-solvent esterification method achieves the esterification reaction in the lower temperature (75 DEG C) through using the compound catalyst. Compared with the two steps, the invention has better application performance. The invention synthesizes sustained release-type polyocarboxy acid high performance water reducing agent through the adjustment of the reaction condition and the kind and type of components in each reaction. The product is suitable for the concrete with high request to the control of the slump.

Description

technical field [0001] The present invention relates to a formulation of a slow-release polycarboxylate high-performance water reducer and a manufacturing method thereof, in particular to a formulation of a slow-release polycarboxylate high-performance water reducer applied to high-performance concrete in the construction industry and methods of manufacture thereof. Background technique [0002] For concrete projects that require high concrete slump control ability, especially pumping high-fluidity concrete in summer, such as self-compacting concrete, underwater pouring concrete, etc., a slow-release polycarboxylate high-performance water reducing Only when the agent is added to the concrete can the slump of the concrete have a high control ability. For this water reducer, at present, most processes use solvent (toluene, etc.) water-carrying method in the esterification process, and the esterification temperature is generally around 130°C, causing certain pollution and dama...

AI Technical Summary

Problems solved by technology

Although some admixture manufacturers have industrialized the production of polycarboxylic acid-based high-efficiency water reducers, the product types are relatively single, and the formulation of polycarboxylic acid products has not been adjusted and improved according to the needs of practical applications.

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