A kind of acrylic acid modified epoxidized organic silicon photocuring coating and preparation method thereof
A technology of photocuring coatings and epoxidation, applied in the field of coatings, can solve the problems of restricting the application of anthraquinone photoinitiators, yellowing of photocuring films, etc., and achieve the effects of avoiding bad smell, preventing migration, and good flexibility
Active Publication Date: 2022-04-15
长沙市湘鼎涂料有限公司
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Problems solved by technology
[0003] Anthraquinone photoinitiator is a widely used hydrogen abstraction photoinitiator. It has good surface curing, good solubility, and low price. However, it must be used in conjunction with amine co-initiators to achieve better results. Play a role
Amine co-initiators are not only toxic and carcinogenic, but when used in conjunction with anthraquinone photo-initiators, amine co-initiators are likely to react with oxidative substances to form colored substances, which will deepen the chroma of the light-cured film (yellowing ), the possible mechanism of its yellowing is: in the photocuring process, the amine co-initiator reacts with a photoinitiator (such as anthraquinone photoinitiator) containing a large conjugated aryl ketone structure to generate a chromophore Higher conjugated structure products and aldehyde structures, which cause yellowing of photocurable films (Zhao Yufei, Nie Jun, He Yong. Synthesis of new amine co-initiators and their research on the yellowing properties of photocurable films[J]. Journal of Radiation Research and Radiation Technology, 2008(05):26-30.), which seriously restricts the application of anthraquinone photoinitiators in the field of photocuring
Method used
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Embodiment 1
[0033] Acrylic modified epoxidized silicone photocurable coating, by weight fraction, includes the following components:
[0034]
Embodiment 2
[0036] Acrylic modified epoxidized silicone photocurable coating, by weight fraction, includes the following components:
[0037]
Embodiment 3
[0039] Acrylic modified epoxidized silicone photocurable coating, by weight fraction, includes the following components:
[0040]
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Abstract
The invention relates to the technical field of coatings, in particular to an acrylic-modified epoxidized silicone light-curing coating and a preparation method thereof. Anthraquinone photoinitiators must be used in conjunction with amine co-initiators to play a better role, and amine co-initiators are toxic and carcinogenic, and the cured film triggered by them is prone to yellowing. Based on the above problems, the present invention provides a kind of acrylic acid modified epoxidized silicone photocuring coating, which adopts dioxathiolane with double bonds in the side chain as the hydrogen donor of anthraquinone photoinitiator, It effectively solves the problem that the amine co-initiator is toxic and carcinogenic, and easily causes yellowing of the cured film. In the present invention, the photoinitiation aid is dioxathiolane with double bonds in the side chain as the photoinitiation aid and anthraquinone photoinitiator. The performance is the same as when the amine co-initiator is used as the hydrogen donor of the anthraquinone photoinitiator, and it has good room temperature curing performance.
Description
technical field [0001] The invention relates to the technical field of coatings, in particular to an acrylic-modified epoxidized silicone light-curing coating and a preparation method thereof. Background technique [0002] The photoinitiator is a key component of the photocuring system, which is related to whether the formula system can quickly change from liquid to solid under light. According to the mechanism of action of the generated active free radicals, photoinitiators are mainly divided into two categories: cleavage photoinitiators or hydrogen abstraction photoinitiators. Among them, the hydrogen abstraction type photoinitiator is generally based on an aromatic ketone structure, which has a certain light-absorbing performance, and has a bimolecular interaction with the co-initiator in the excited state, captures the hydrogen on the co-initiator, generates active free radicals, and then initiates The monomers and oligomers are polymerized and cross-linked to obtain a ...
Claims
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IPC IPC(8): C09D183/06C09D163/10C08F2/48
CPCC09D183/06C09D163/10C08F2/48C08L63/10
Inventor 管善月
Owner 长沙市湘鼎涂料有限公司