Thioxanthone derivative photo-initiator for UV-LED curing, preparation method and application thereof

A UV-LED and thioxanthone technology are applied in organic chemistry, coatings, epoxy resin coatings, etc., which can solve the problems of easy yellowing of cured film and restrict applications, so as to reduce yellowing, toxicity, and low Effect of yellowing and low preparation cost
CN109734827AActive Publication Date: 2019-05-10SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2019-05-10

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Abstract

The invention discloses a thioxanthone derivative photo-initiator for UV-LED curing, a preparation method and an application thereof. The preparation method comprises the following steps: adding thiosalicylic acid into concentrated sulfuric acid, and then adding phenol derivative for cyclization preparation; pouring a first-step reaction solution into cold water, performing suction filtration after forming sediment, and repeatedly washing with water, thereby acquiring an orange crude product; dissolving the crude product, filtering, washing with water, purifying solution, regulating pH value,centrifugally separating, and drying in an oven, thereby acquiring an end product of thioxanthone derivative photo-initiator. Such a compound can be singly used as the photo-initiator for substitutinga thioxanthone initiating system, so that yellowing caused by amine-aided initiator can be reduced, excitation wavelength is longer, curing reaction under 395-405nm UV-LED irradiation can be realizedand the thioxanthone derivative photo-initiator has an extensive application prospect in the photo-curing industrial field.
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Description

technical field

[0001] The invention relates to a photoinitiator and a preparation method thereof, in particular to a thioxanthone derivative with better initiating activity for UV-LED curing, a preparation method and application thereof. Background technique

[0002] Photocuring refers to the curing process of reactive diluents, oligomers and photoinitiators under light induction. It is generally used in the film forming process. , so as to initiate the cross-linking polymerization of active monomers and prepolymers.

[0003] Light curing technology requires light sources, such as xenon lamps, mercury arc lamps, microwave lamps, pulsed light sources, and laser light sources. Their emission spectrum varies from 254nm to 800nm, and the light intensity also varies from the unit mW·cm -2 Level to W·cm -2 . The traditional light curing technology mainly uses ultraviolet light (UV) as the light source. The conventional UV light source comes from medium-pressure or high-pressu...

Claims

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