A refractory dispersant and a method for preparing the same

By introducing comb-shaped copolymers into refractory material dispersants and using specific molecular weight compounded polyethylene glycol side chains and phosphate groups, the problems of insufficient dispersion efficiency and stability of existing dispersants are solved, achieving a synergistic improvement in high fluidity and long-term stability, making it suitable for high-temperature processing environments of refractory materials.

CN121801100BActive Publication Date: 2026-06-05LUOYANG INST OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
LUOYANG INST OF SCI & TECH
Filing Date
2026-03-10
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing refractory dispersants are insufficient in terms of dispersion efficiency and stability, making it difficult to balance high initial fluidity and long-term anti-settling properties. Furthermore, their synthesis routes are lengthy and fail to effectively improve the molecular structure and performance of the dispersants.

Method used

A comb-structured copolymer dispersant is used to introduce asymmetric compound polyethylene glycol side chains and phosphate groups within a specific molecular weight range through esterification grafting to form a styrene-maleic anhydride copolymer backbone. The degree of esterification grafting is controlled to be 50% to 85%, and the adsorption capacity of the particle surface is enhanced through chemical bonding.

Benefits of technology

It achieves excellent initial dispersibility, long-term anti-settling stability and high thermal stability of refractory slurry, improves construction performance and product quality, reduces the amount of additives, and increases the density and mechanical strength of the formed green body.

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Abstract

The present application relates to a kind of refractory dispersant and its preparation method in the technical field of refractory additive, it is the comb structure copolymer, the copolymer includes styrene-maleic anhydride copolymer main chain, polyethylene glycol side chain grafted on the styrene-maleic anhydride copolymer main chain by ester bond, and phosphate radical;The polyethylene glycol side chain includes short-chain polyethylene glycol with molecular weight of 400-600 and long-chain polyethylene glycol with molecular weight of 800-1200.The present application realizes the precise division of function by using asymmetric compound polyethylene glycol side chain of specific molecular weight range, and controls esterification grafting degree is 50%-85%, not only can provide excellent initial wetting and dispersion force, ensure that slurry has excellent construction fluidity, but also can effectively prevent particle re-aggregation and sedimentation under static or shear, so as to fundamentally solve the technical problem that traditional dispersant is difficult to consider high initial fluidity and long-term anti-settling property, plasticity.
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