Low-surface-energy macromolecular photoinitiator, UV (ultraviolet) LED (light-emitting diode) photocureable coating and photocureable skin-touch coating

By using low-surface energy macromolecular photoinitiator, the problem of oxygen inhibition during curing of ultraviolet cured coatings is solved by using their characteristics of self-assembly and forming oxygen insulation layer on the surface of the coating, and a simpler process and better coating performance are achieved.

CN119708499APending Publication Date: 2025-03-28SHANGHAI JIAOTONG UNIV
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Patent Information

Application Number
CN202311288105.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2023-09-28
Publication Date
2025-03-28

AI Technical Summary

Technical Problem

The existing ultraviolet curing coatings are easily subjected to oxygen polymerization-resistance effect during the curing process, resulting in incomplete curing of surfaces, sticking and wrinkling problems. Small-molecular photoinitiators are prone to migrating, have a large odor, and are complex in the process.

Method used

A low-surface energy macromolecular photoinitiator is used, which forms a molecular structure with certain migration ability and anti-oxidative polymerization effect through the connection of the repeatedly arranged ultraviolet photoinitiator segments, co-initiator amine molecular segments and low-surface energy segments.

Benefits of technology

Effectively block the diffusion of oxygen into the curing system, solve the oxygen polymerization problem during the curing process, simplify the curing process, and improve the surface performance and durability of the coating.

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Abstract

The invention provides a low-surface-energy macromolecular photoinitiator, a UV (ultraviolet) LED (light-emitting diode) photocureable coating and a photocureable skin-touch coating. The low-surface-energy macromolecular photoinitiator comprises an ultraviolet light initiator chain segment, a coinitiator amine molecular chain segment, a low-surface-energy chain segment and a functional end group which are arranged repeatedly, and the ultraviolet light initiator chain segment, the coinitiator amine molecular chain segment, the low-surface-energy chain segment and the functional end group are randomly connected through single bonds. The low surface energy chain segment comprises one or more of C1-C30 divalent alkyl and divalent siloxy which are partially substituted or completely substituted by fluorine atoms; the amine molecular chain segment of the co-initiator can be used as a hydrogen donor of an ultraviolet light initiator chain segment, so that the photo-initiation efficiency can be improved; due to the introduction of the low-surface-energy chain segment, the low-surface-energy macromolecular photoinitiator has a certain migration ability, self-assembly can occur on the surface of a coating after film coating, the oxygen isolation ability is improved, and a skin feeling layer is formed through illumination; the functional end group participates in thermocuring, so that the mechanical property of the coating is improved.
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