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Cationic photocurable coating for transfer film

A technology of light-curing coatings and cations, applied in coatings and other directions, can solve the problems of poor scratch resistance and wear resistance of coatings, unclear transfer patterns, and no protective effect, so as to improve hardness, wear resistance, and fullness Good, strong aesthetic effect

Active Publication Date: 2015-04-22
GUANGDONG HEYGEY LIGHT CURING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] During the transfer process, usually due to the poor adhesion between the protective coating layer and the printing ink, the transfer pattern is not clear and the edges peel off; the coating has poor scratch resistance and wear resistance, and has no protective effect; ordinary thermosetting coatings are used A large amount of volatile solvents are produced during the process, which is harmful to the environment

Method used

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  • Cationic photocurable coating for transfer film
  • Cationic photocurable coating for transfer film
  • Cationic photocurable coating for transfer film

Examples

Experimental program
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preparation example Construction

[0021] The preparation method of the thermally curable acrylate used in the present invention can be:

[0022] 1. React one isocyanate group of hydroxyacrylate and polyisocyanate, the molar ratio of hydroxyacrylate and polyisocyanate is 1:1, add dibutyltin dilaurate (DBTDL) accounting for 0.05% of the mass of polyisocyanate as a catalyst, React under anhydrous conditions for 10h, the reaction temperature is 40°C; the infrared spectrum of hydroxyacrylate is 3300cm -1 The characteristic absorption peak of the hydroxyl group at the place disappears; then the reaction is completed, and a heat-curable acrylate is obtained for use;

[0023] 2. At room temperature, weigh epoxy resin, heat-curable acrylate, cationic photoinitiator, free radical photoinitiator and auxiliary agent according to their respective proportions, and mix them evenly to obtain the cationic photoinitiator used for the transfer film Light-curing coating, ready for use;

[0024] Among them, the epoxy resin is bi...

specific Embodiment 1-10

[0031] Concrete embodiment 1-10 sees table 1 and table 2:

[0032] Table 1

[0033]

[0034] Table 2

[0035]

[0036] Comparative examples 1-3 are shown in Table 3:

[0037] table 3

[0038]

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Abstract

The invention belongs to the field of coatings and particularly relates to a cationic photocurable coating for a transfer film. The coating is prepared from the following components in percentage by mass: 35-70% of epoxy resin, 25-60% of thermocurable acrylate, 1-5% of a cationic photoinitiator, 2-4% of a free radical photoinitiator and 0.1-0.2% of auxiliaries. The cationic photocurable coating for the transfer film provided by the invention is high in curing speed. After ultraviolet irradiation, double bonds in thermocurable acrylate are quickly cured and the viscosity of the coating is increased, and meanwhile, the cationic initiator initiates the epoxy resin for cationic polymerization. After evacuation of ultraviolet, the coating can be further cured so as to accomplish deep curing. In the process, the ring opening effect of the epoxy resin compensates the volume shrinkage generated in the acrylate polymerization process, so that the volume shrinkage of the system is greatly reduced.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a cationic light-curing coating used for a transfer film. Background technique [0002] As a new type of printing process, thermal transfer printing is widely used in various fields because of its bright colors and clear patterns. Thermal transfer printing is mainly realized by transfer film. The main preparation process is to sequentially coat release agent, transparent coating, printing ink, colored primer, hot melt, etc. on the film. The printing ink and protective coating layer on the transfer film It is an important factor affecting the transfer effect. [0003] During the transfer process, usually due to the poor adhesion between the protective coating layer and the printing ink, the transfer pattern is not clear and the edges peel off; the coating has poor scratch resistance and wear resistance, and has no protective effect; ordinary thermosetting coatings are used A large amount...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D4/06C09D7/12
Inventor 彭健华吴勇蒋卫华
Owner GUANGDONG HEYGEY LIGHT CURING MATERIALS
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