Polyacrylate macromolecule and its preparation method and application

Polyacrylate macromolecules are prepared by aqueous copolymerization of acrylate monomers with unsaturated polyether macromonomers and functional monomers, which solves the adaptability and anti-mud sensitivity problems of polycarboxylic acid water reducers, achieves excellent water-reducing and dispersing properties and anti-mud properties, reduces costs, and is suitable for cement concrete, building materials and gypsum boards.

CN117567695BActive Publication Date: 2025-09-23LINYI UNIVERSITY
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Patent Information

Application Number
CN202311526626.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-16
Publication Date
2025-09-23
Estimated Expiration
2043-11-16

AI Technical Summary

Technical Problem

Existing polycarboxylate water-reducing agents have problems such as poor adaptability, sensitivity to aggregate mud content, and poor workability during application. In addition, the cost of raw materials is high, which is not conducive to industrial application and promotion.

Method used

A polyacrylate macromolecule is prepared by free radical copolymerization of acrylate monomers, unsaturated polyether macromonomers and functional monomers in an aqueous phase. The emulsifying and reactivity of the functional monomers are combined with unsaturated double bonds to participate in the copolymerization reaction to form nanoaggregates, which achieve adsorption and dispersion of cement particles and block soil intercalation adsorption through the steric hindrance effect.

Benefits of technology

It has achieved excellent water-reducing and dispersing properties and anti-mud sensitivity properties, reduced production costs, and is suitable for the fields of cement concrete, building materials and gypsum boards, significantly improving the fluidity and mechanical properties of concrete.

✦ Generated by Eureka AI based on patent content.

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Abstract

The present invention discloses a novel polyacrylate macromolecule, its preparation method, and application, belonging to the technical field of functional polymer materials. The polyacrylate macromolecule of the present invention is prepared by aqueous free radical copolymerization of an acrylate monomer, an unsaturated polyether macromonomer, and a functional monomer. The present invention uses an unsaturated polyether macromonomer commonly used in the preparation of commercially available polycarboxylic acid water-reducing agents as the main raw material. By optimizing and regulating the types and ratios of the acrylate monomer and the functional monomer, a novel polyacrylate macromolecule is obtained. The electrostatic effect of the carboxyl group in the molecular structure and the steric hindrance effect of the unsaturated polyether macromonomer side chain synergistically achieve adsorption and dispersion of cement particles. When used as a concrete water-reducing agent, the polyacrylate macromolecule exhibits excellent water-reducing, dispersing, and anti-mud sensitivity properties.
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Citation Information

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