Polymerization initiator mixture, polymerizable composition and cured product

The polymerization initiator mixture with a photopolymerization initiator and thioxanthone sensitizer addresses the issue of poor curability and coloration in LED-cured films with high pigment content, providing efficient and low-coloration curing solutions.

JP2026121013APending Publication Date: 2026-07-23NOF CORP
7 Cites 0 Cited by

Patent Information

Application Number
JP2025004013
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-01-10
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

Conventional photopolymerization initiators used with LED lamps fail to provide sufficient radical generation and curing performance in polymerizable compositions with high pigment content, leading to poor curability and strong coloration of the cured product, which affects color reproducibility.

Method used

A polymerization initiator mixture containing a photopolymerization initiator represented by formula (1) and a sensitizer with a thioxanthone skeleton, where the sensitizer is present in a specific mass ratio, effectively enhances curability under LED lamps while minimizing coloration.

Benefits of technology

The mixture achieves excellent curability and low coloration in cured films, ensuring effective curing and color reproducibility using LED lamps even with high pigment content.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The objective is to provide a polymerization initiator mixture that, when incorporated into a polymerizable composition containing a radical polymerizable compound, yields a cured film with excellent curability under LED lamps and low coloration. [Solution] (a) A polymerization initiator mixture containing a photopolymerization initiator represented by the following formula (1) and a sensitizer, wherein the sensitizer is a compound having a thioxanthone skeleton, The polymerization initiator mixture is characterized in that the content of the sensitizer is 1% by mass or more and less than 30% by mass, based on 100% by mass of the polymerization initiator mixture (a). [Formula 1] JPEG2026121013000010.jpg3064
Need to check novelty before this filing date? Find Prior Art