Photocurable reactive diluent, process for its preparation and use thereof

A photocurable active diluent was synthesized through a mercapto-olefin conjugated addition reaction, which solved the problem of poor adhesion of photocurable materials on glass substrates. This resulted in high adhesion, transparency, and environmentally friendly production, and is suitable for various photocuring systems.

CN122127360APending Publication Date: 2026-06-02HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HUBEI LONGSHENG SIHAI NEW MATERIALS CO LTD
Filing Date
2026-03-05
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing photocurable materials have poor adhesion to glass substrates. Conventional physically added silane coupling agents have poor compatibility, and chemically synthesized silicon-based diluents are prone to producing strong acid byproducts, leading to coating defects.

Method used

A photocurable active diluent is synthesized by a thiol-alkene conjugated addition reaction. The reaction of alkoxysilanes containing thiol groups with polyacrylate compounds forms a structure with thiol thioether bonds, ensuring photocuring activity and glass adhesion. A non-metallic catalyst is used to avoid the generation of acidic gases.

Benefits of technology

It significantly improves the adhesion and abrasion resistance of UV-cured coatings on glass, maintains transparency, simplifies the production process, reduces equipment costs, and is suitable for a variety of UV-curing systems.

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Abstract

This application relates to the field of photocurable materials technology, specifically to photocurable reactive diluents, their preparation methods, and applications. The preparation method of the photocurable reactive diluent includes the following steps: S1, adding acrylate and a catalyst to an organic solvent, stirring thoroughly to obtain a uniform mixture, wherein the acrylate is a polyacrylate compound containing at least two acryloyloxy groups; S2, adding an organosilane dropwise to the mixture, controlling the temperature of the reaction system at 20℃~80℃, and maintaining the reaction temperature for 2~8 hours, wherein the organosilane is an alkoxysilane containing a mercapto group; S3, removing the organic solvent under vacuum to obtain the photocurable reactive diluent. This application introduces the acrylate structure into a siloxane through block copolymerization, resulting in a product with low viscosity, fast curing speed, high hardness, good wear resistance, and good compatibility with photocurable coatings. It exhibits particularly good adhesion to glass substrates and has promising application prospects.
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