Copolymers and methods for making the same

The copolymer prepared by copolymerization of specific structural units and monomers solves the problem of insufficient developability and storage stability of resin compositions at low temperatures, and achieves the formation of cured products with excellent solvent resistance, which are suitable for color filters and image display elements on flexible substrates.

CN116745327BActive Publication Date: 2026-06-09RESONAC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
RESONAC CORP
Filing Date
2021-12-08
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing resin compositions have poor developability and storage stability when used as photosensitive materials, and it is difficult to obtain cured products with excellent solvent resistance when thermally cured at low temperatures, especially when forming color filters on flexible substrates, where heat resistance is poor.

Method used

A copolymer containing specific structural units (a), hydroxyl structural units (b), and acidic structural units (c) is used to prepare a resin composition that can be cured at 60–90°C. The copolymer has a glass transition temperature below 30°C and includes a photopolymerization initiator and a reactive diluent.

Benefits of technology

A resin composition with good developability and storage stability at low temperatures has been developed, which can form a cured product with excellent solvent resistance, suitable for color filters on flexible substrates, and improves the performance of image display elements.

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Abstract

The present invention aims to provide a resin composition, a copolymer useful for modulating the resin composition, and a method for producing the copolymer, the resin composition being excellent in developing property when used as a photosensitive material, having excellent storage stability, and allowing a cured product excellent in solvent resistance to be obtained even when curing is performed at low temperature. A copolymer is produced, which contains structural unit (a) having a group represented by formula (1) or formula (2), structural unit (b) having a hydroxyl group, and structural unit (c) having an acid group, and has a glass transition temperature of 30°C or lower.
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