Low-viscosity long-pot-life impregnating resin and preparation method thereof

Through the copolymerization reaction of components such as vinyl acetate, a three-dimensional thermosetting unsaturated polyester resin is formed, which solves the problems of high viscosity and low impregnation efficiency of impregnation resin, and realizes the applicability of high-efficiency impregnation and high-density substrates.

CN121991273APending Publication Date: 2026-05-08ANHUI NUCLEAR POLY MATERIALS TECH CO LTD
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Patent Information

Application Number
CN202411557234.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-04
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Existing impregnation resins have high viscosity, resulting in low impregnation efficiency and difficulty in meeting the impregnation requirements of high-density substrates. They also have problems with poor water resistance and weather resistance.

Method used

A copolymerization reaction is carried out using components such as vinyl acetate, modified monomers, polyvinyl alcohol, dodecylphenol polyoxyethylene ether, sodium chloride, ammonium persulfate, sodium bicarbonate, and styrene. Through the crosslinking reaction of styrene, a thermosetting unsaturated polyester resin with a three-dimensional structure is formed, which reduces the resin viscosity and improves the flowability.

Benefits of technology

It improves the impregnation efficiency of the impregnation resin, meets the impregnation requirements of high-density substrates, enhances the mechanical properties and flowability of the resin, and extends the pot life of the curing system.

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Abstract

The invention provides impregnating resin with low viscosity and long pot life and a preparation method thereof. Belongs to the field of impregnating resin. According to the technical key points, the adhesive comprises the following components in percentage by mass: 90-100 parts of vinyl acetate; 90 to 100 parts of a modified monomer; 1 to 1.5 parts of polyvinyl alcohol; 1.2 to 1.5 parts of dodecylphenol polyoxyethylene ether; 1.5 to 1.8 parts of sodium chloride; 0.3 to 0.4 part of ammonium persulfate; 1.3 to 1.4 parts of sodium bicarbonate; 90 to 100 parts of distilled water; 3 to 4.3 parts of styrene; silicone oil; 2 to 6 parts; and 1.1 to 1.3 parts of sodium hydroxide. The method comprises the following steps: S1, adding a mixed solution of a sodium hydroxide solution and a sodium chloride solution into a modified monomer, washing for 3-5 times, filtering and separating the monomer, and washing for 3-5 times by using distilled water; the invention aims to provide impregnating resin with low viscosity and long pot life and a preparation method thereof. The impregnating resin is used for enabling the impregnating efficiency to be higher when the whole impregnating resin is used, and meanwhile, the impregnating requirement of a high-density base material can be met.
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