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A light-curing composition and its use as varnish and paint

A composition and light-curing technology, applied in the field of light-curing composition and its application, polyisocyanate and polymercapto compound composition, can solve the problems of lack of practicability, long exposure time, etc., and achieve improved curing efficiency and alkali catalysis speed Fast, short exposure time effect

Active Publication Date: 2019-08-27
INSIGHT HIGH TECH (BEIJING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The UVA exposure time is 10 minutes, and then observe its curing time. The shortest time is 1 minute, and the longest is 10 minutes. The obvious disadvantage is that the exposure time is too long and lacks practicability.

Method used

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  • A light-curing composition and its use as varnish and paint
  • A light-curing composition and its use as varnish and paint
  • A light-curing composition and its use as varnish and paint

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 Preparation of Photobase Generator

[0032] Compounds IA and IB were prepared according to the method described in patent EP88050; referring to this method, diphenyl ether was used as raw material instead of sulfide anisole to prepare compound IC. The H NMR spectrum data proved that the structure was correct and the melting point was 93-95°C.

Embodiment 2

[0033] Example 2 Preparation of photocurable composition

[0034] Prepare photocurable composition according to table 1 composition:

[0035] Table 1

[0036]

[0037] According to the corresponding relationship in Table 2, 5 parts of photocurable compositions were prepared

[0038] Table 2

[0039]

[0040] Among them, IHT-PI907 is a high-efficiency free radical (I) type solid photoinitiator, which is mainly used for unsaturated prepolymers (such as: acrylate) together with mono- or polyfunctional vinyl monomers and oligomers. UV curing, especially suitable for colored UV curing systems. The chemical structural formula is:

[0041] Chemical name: 2-methyl-2-(4-morpholinyl)-1-[4-(methylthio)phenyl]-1-propanone; PLA-2 is 2-benzyl-2-dimethyl Amino-1-(3,4-dimethoxyphenyl)-1-butanone.

Embodiment 3

[0042] Embodiment 3 coating curing test

[0043] a. Prepare component A and component B respectively;

[0044] b. Mix component A and component B in proportion;

[0045] c. 100μm wire rod coating film;

[0046] d. Dry at room temperature for 3 minutes;

[0047] e. Mercury lamp, double lamp (power: 2kw) irradiation for 5s or 3s;

[0048] f. Record the time required for the paint film to fully cure after irradiation.

[0049] The test results are recorded in Table 3.

[0050] table 3

[0051]

[0052] Conclusion: the post-curing time of the composition of the present invention is significantly shorter than that of the prior art solution, and can be used in practical use completely.

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Abstract

The present invention discloses a photocurable composition and uses of the photocurable composition as varnish and colored paint. The photocurable composition comprises at least a photoinduced alkali production agent represented by a general formula I, at least a polyisocyanate compound and at least a poly mercapto compound, wherein in the general formula I, R is C1-C8 alkyl, phenyl, C1-C4 alkyl and C1-C4 alkoxy substituted phenyl or a group defined in the specification, X is a straight bond, O or S, or R-X is defined in the specification, and n is 1 or 2. According to the present invention, the photoinduced alkali production agent having the specific structure is used, such that the UV lamp irradiation time required by the composition curing is short, the activity of the light-producing alkali is high, the alkali catalyzing is fast, the cross-linking curing is completed in a short time, the remarkably improved curing efficiency is provided, the application period is not affected, and the industrial practical value is provided.

Description

technical field [0001] The present invention relates to the technical field of curing compositions, in particular to a photocurable composition and its application, especially a polyisocyanate and polymercapto compound composition cured by photobase catalysis, which can be used as a coating cured by local coating at room temperature. Background technique [0002] The early document of photobase generation catalytic curing composition has US4369206A, and it discloses α-formylformic acid organic ammonium salt as photobase generation agent, and its shortcoming is that one of decomposition product is carbon dioxide, forms bubble in cured film, solidifies Membrane performance degrades. [0003] EP898202A discloses that α-aminoacetophenone compound is used as a technical solution for curing epoxy resin or epoxy resin and polythiol composition curing by photobase generation. In the curing and developing application of Example 9, the irradiation time is as long as 320 seconds, obvi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/79C08G18/38G03F7/004C09D175/04
Inventor 赵文超
Owner INSIGHT HIGH TECH (BEIJING) CO LTD
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