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Photocurable coating material

A light-curing and coating technology, which is applied in polyurea/polyurethane coatings, coatings, thin material treatment, etc., can solve the problems of reducing curing shrinkage, insufficient heat discoloration resistance, etc., and achieves the effect of excellent impact resistance

Inactive Publication Date: 2009-04-08
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this publication, by making the polyol have a condensed polycyclic structure, the curing shrinkage can be reduced, and the adhesion or the cracking of the coating film in the heat resistance test can be improved. sexual inadequacy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Under a nitrogen atmosphere, 468g hydrogenated xylylene diisocyanate and 32g 2-ethylhexanol are charged into a four-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a serpentine condenser (Dimroth condenser), and the temperature is raised to After holding at 80°C for 2 hours, trimethyl-N-2-hydroxypropylammonium and 0.08 g of 2-ethylhexanoate were added as a catalyst. While adjusting the reaction temperature to 85±5°C, react for 2 hours, then add 0.05 g of benzoyl chloride to deactivate the catalyst and stop the reaction. The obtained reaction solution was treated with a thin-film distillation apparatus (vacuum degree 0.5mmHg, temperature 150°C) to remove unreacted hydrogenated xylylenediisocyanate, cooled, and diluted with ethyl acetate so that the non-volatile content was 80%. weight%. 2-Hydroxyethyl acrylate was added thereto so that the remaining isocyanate groups and acrylate groups were equivalent, and monomethyl ether hydroquinone wa...

Embodiment 2

[0050] In a four-necked flask equipped with a stirrer, a thermometer, a nitrogen inlet pipe and a serpentine condenser, 200g of hydrogenated methylene diphenylene diisocyanate and 2g of monomethyl ether hydroquinone are charged, and under a nitrogen atmosphere, the The reaction temperature was controlled below 70° C., while 176.8 g of 2-hydroxyethyl acrylate was added dropwise. After all the mixture was dropped, 0.1 g of dibutyltin laurate was added, and the temperature was maintained at a reaction temperature of 70° C. until the isocyanate group completely disappeared. After cooling, it diluted with ethyl acetate so that the non-volatile matter amount might become 80 weight%, and the urethane acrylate of this invention was obtained. Furthermore, 70 g of dipentaerythritol hexaacrylate and 3 parts by weight of Irgacure 184 (a photopolymerization initiator manufactured by Ciba Specialty Chemical Co., Ltd.) were mixed in 37.5 g of this urethane acrylate (30 g of urethane acrylate...

Embodiment 3～8

[0052] The paints shown in Table 1 were obtained using the urethane acrylate (U) produced in Examples 1 and 2.

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PUM

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Abstract

Disclosed is a photocurable coating material which is cured by ultraviolet light, electron beam, radiation or the like. This coating material is excellent in thermal discoloration resistance, adhesion to a base, abrasion resistance, water resistance and impact resistance. Specifically disclosed is a photocurable coating material characterized by containing 5-95 parts by weight of a urethane acrylate (U), 5-95 parts by weight of an acrylate compound (M) and 0.1-15 parts by weight of a photoinitiator (C) per 100 parts by weight of the total of the components (U) and (M). This photocurable coating material is also characterized in that the urethane acrylate (U) contains at least one or more diisocyanates (a) selected from the group consisting of hydrogenated xylylenediisocyanate and hydrogenated methylene bisphenylene diisocyanate, and a compound (b) containing a hydroxyl group and a (meth)acrylate group. The photocurable coating material is further characterized in that the acrylate compound (M) has two or more acrylate groups in a molecule with an acrylate group content of 5-12 mmol / g, while containing no aromatic ring structure.

Description

technical field [0001] The present invention relates to photocurable coatings that can be cured under the action of ultraviolet rays, electron rays, radiation rays and the like. Background technique [0002] UV-curable coatings are composed of oligomers or monomers, and since they cure under the action of light, they have no volatile components, and are attracting attention as coatings that address environmental issues. Photocurable urethane acrylate is known as an oligomer component capable of providing a coating film excellent in scratch resistance. In general, urethane acrylate has excellent scratch resistance, and at the same time has excellent richness and high reflective properties, and can obtain a high-end appearance, but on the other hand, it may change color due to heat or environmental changes The problem. [0003] In order to solve the above-mentioned problems, Patent Document 1 discloses an active energy ray-curable resin composition containing urethane acryla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D4/02C09D175/16B32B27/30C08F299/06
CPCC08F299/06C09D175/16C08G18/752C09D4/00C08G18/672C08L33/08C09D133/14C09D133/08C08F290/06C08G18/758C08F283/006C08L33/14Y10T428/31551C08G18/48C08G18/44C08L2666/20C08L2666/04C09D175/06
Inventor 石田忠松本刚
Owner MITSUI CHEM INC
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