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Cyclic acetal base-containing thioxanthone photo initiator and preparation method thereof

A technology of thioxanthone and xanthone light, which is applied in the field of thioxanthone photoinitiator and its preparation, can solve problems such as needs, and achieve the effects of low preparation cost, reduced yellowing and toxicity, and simple synthesis

Inactive Publication Date: 2010-09-01
CHANGZHOU JIESEN CHEM MATERIAL TECH +1
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Problems solved by technology

In order to overcome the above-mentioned defects, the technical problem to be solved in the present invention is to provide a thioxanthone photoinitiator that does not require an amine co-initiator for the existing thioxanthone photoinitiators. Initiator

Method used

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  • Cyclic acetal base-containing thioxanthone photo initiator and preparation method thereof
  • Cyclic acetal base-containing thioxanthone photo initiator and preparation method thereof
  • Cyclic acetal base-containing thioxanthone photo initiator and preparation method thereof

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Abstract

The invention relates to the technical field of photo initiators, in particular to a hioxanthone photo initiator and a preparation method thereof. The cyclic acetal base-containing thioxanthone photo initiator has a chemical structural formula shown in the specification, wherein n=0 or 1; and R=H, CH3, CH2CH3, CH2CH2CH3, CH2CH2CH2CH3, C(CH3)3, CHO, COOH, or OH, C1, F or I. The preparation method comprises the following steps of: adding one molar portion of 2-mercaptobenzoic acid into five mol portions of 1, 3-benzodioxole pentane or 1, 3-benzodioxole hexane and derivatives thereof; slowly dropwise adding concentrated acid, wherein the volume of the concentrated acid is 1.5 times the molar portion of 2-mercaptobenzoic acid calculated by L; reacting for 1 to 24 hours at the temperature of 0 to 70 DEG C; carefully pouring the mixture to boiling water , cooling and filtering; recrystallizing by utilizing a component solvent of dioxane and water; and drying in vacuum to obtain the cyclic acetal base-containing thioxanthone.

Description

technical field The invention relates to the technical field of photoinitiators, in particular to a thioxanthone photoinitiator and a preparation method thereof. Background technique The photopolymerization reaction of multifunctional monomers such as bis(meth)acrylate can quickly form a highly crosslinked polymer network structure. Especially important in areas with high sexual demands. The photoinitiator is a key component of the photocuring system, which is related to whether the oligomer and diluent of the formulation system can quickly change from liquid to solid when light is irradiated. Its basic function characteristics are: the initiator molecule has a certain light absorption ability in the ultraviolet light region (250-400nm) or visible light region (400-800nm), after directly or indirectly absorbing light energy, the initiator molecule transitions from the ground state to the excited singlet state , through intersystem crossing to the excited triplet state; af...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F2/48C07D495/04
Inventor 恽鹏飞赵贤顾明天顾来福王兵
Owner CHANGZHOU JIESEN CHEM MATERIAL TECH
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