Polymerizable thioxanthone water-based photoinitiator as well as preparation method and application thereof

A thioxanthone water-based and xanthone-based water-based technology is applied in the field of thioxanthone water-based photoinitiators and their preparation, which can solve the problems of low curing efficiency and high cost of raw materials, achieve high curing degree and overcome oxygen inhibition of polymerization. , the effect of high light-induced efficiency
CN114561005AActive Publication Date: 2022-05-31SUN YAT SEN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUN YAT SEN UNIV
Publication Date
2022-05-31

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Abstract

The invention belongs to the technical field of high polymer materials, and particularly relates to a polymerizable thioxanthone water-based photoinitiator and a preparation method and application thereof, and the polymerizable thioxanthone water-based photoinitiator contains a polyaminoamine structural unit, a thioxanthone structural unit and a phosphoric acid structural unit, the thioxanthone structural unit and the phosphoric acid structural unit are randomly connected with N in the polyaminoamine structural unit. According to the thioxanthone water-based photoinitiator, linear polyaminoamine serves as a macromolecular main chain, linear polyamide, a phosphate group, thioxanthone and an amine structure are contained on the macromolecular main chain at the same time, the number of curing sites is larger, and the curing degree is higher. Moreover, the thioxanthone water-based photoinitiator can participate in two stages of a one-pot dual-curing process in an acrylic acid group / methacrylic acid group UV photocuring system, not only can be used as a nucleophilic reagent and alkali in a first-stage reaction, but also can induce free radical polymerization in a second-stage reaction.
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Description

technical field

[0001] The invention relates to the technical field of polymer materials, in particular to a polymerizable thioxanthone aqueous photoinitiator and its preparation method and application. Background technique

[0002] Photoinitiators (PI) play an important role in photopolymerization. For traditional small-molecule PIs, photolytic fragments or residual PIs easily migrate to the surface of final products, causing odor or toxicity issues, which limit their applications in food packaging and biomedical materials. Polymeric photoinitiators are attracting attention due to some advantages brought about by their macromolecular nature, in particular, polymeric photoinitiators can reduce the migration of the film surface, thereby reducing the tendency of yellowing, and reducing odor and toxicity problems . These advantages arise from the fact that the production / release of easily migratory molecules is minimized. Since water is a green solvent with no emissions of v...

Claims

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