Dual curing coating

A dual-curing and coating technology, applied in the coating and other directions, can solve the problems of insufficient radiation intensity, contradiction between coating hardness and toughness, and inability to guarantee toughness, to overcome the difficulty of taking into account the hardness and flexibility, and the shrinkage stress of the system. The effect of reducing and improving chemical resistance

Inactive Publication Date: 2008-03-26
CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, conventional UV-curable coatings also have their inherent defects. One is the contradiction between coating hardness and toughness.
The coating of UV-curable coatings is highly cross-linked, high hardness is easy to achieve, but toughness cannot be guaranteed. For applications that require hardness and impact resistance, UV-curable coatings cannot meet the requirements; When the coating film is directly irradiated to obtain sufficient radiation intensity, the cured coating film can achieve the best performance index. For irregular workpieces, the dark side that is not easy to be irradiated or other parts that are not easily irradiated parts, it is impossible to obtain sufficient radiation intensity, therefore, the application of UV-curable coatings in these fields is limited

Method used

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  • Dual curing coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] In a four-necked bottle with a stirrer, condenser, thermometer and dropping funnel, add 100g of epoxy F-51, under stirring at 100°C, drop 37g of acrylic acid, 0.5 A mixture of g N,N-dimethylethanolamine and 0.2 g p-methoxyphenol. Stir the mixture at ≤100°C and keep it warm for reaction. When the acid value drops to 55 mgKOH / g, cool down to 70°C and discharge to obtain a reactive oligomer epoxy acrylate resin.

Embodiment 2

[0029] In a four-neck flask equipped with a stirrer, condenser, thermometer and dropping funnel, add 100g of polyether 210, and add 35g of 2,4-body TDI dropwise from the dropping funnel at a fixed speed within 30min under stirring at 40°C , kept at this temperature for three hours, and then a mixture of 28 g of hydroxypropyl acrylate, 0.014 g of dibutyltin dilaurate and 0.16 g of p-methoxyphenol was added. The mixture was stirred and kept at about 90°C for 6 hours, and when the NCO content was reduced to 0.5%, the temperature was lowered to 60°C, 5g of isopropanol was added and stirred evenly to obtain a reactive oligomer urethane acrylate resin.

Embodiment 3

[0031] In a four-necked flask with a stirrer, a condenser, a thermometer and a dropping funnel, add 150g of xylene, and add 35g of butyl acrylate and 41g of formazan at a fixed speed within 2 hours under stirring at 100°C. A mixture of methyl acrylate, 49g styrene, 15g acrylic acid, and 1.2g benzoyl peroxide, the mixture was stirred and kept at ≤110°C for 5 hours, cooled to 90°C, and 29g glycidyl methacrylate, 0.4g para Methoxyphenol, 0.7g of N,N-dimethylethanolamine, reacted for 6 hours under stirring at about 90°C to obtain an active oligomer acrylate resin.

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Abstract

The invention discloses a dual solidifying paint for wood and metal substrate, which is characterized by the following: the paint component A is ultraviolet solidifying composition, which contains 30-60% low-activity oligomer; the activity thinner is composed of 5-20% 1-alkylene unsaturated and doubly-bond compound, not more than 20% 2-alkylene unsaturated and doubly-bond compound, 5-20% not less than 3-alkylene unsaturated and doubly-bond compound, 1.0-10% photopolymer initiator, not more than 20% adhesion promotion resin, not more than 30% thinner; the composition B contains not less than 3 NCO hardener; the weight rate of component A and B is (85- 95):(5-15).

Description

technical field [0001] The present invention relates to a dual curing coating, especially suitable for wood and metal substrates. Background technique [0002] At present, the application fields of UV-curable coatings are getting wider and wider, and its biggest advantages are rapid drying, high hardness and short production cycle. However, conventional UV-curable coatings also have their inherent defects. One is the contradiction between coating hardness and toughness. The coating of UV-curable coatings is highly cross-linked, high hardness is easy to achieve, but toughness cannot be guaranteed. For applications that require hardness and impact resistance, UV-curable coatings cannot meet the requirements; When the coating film is directly irradiated to obtain sufficient radiation intensity, the cured coating film can achieve the best performance index. For irregular workpieces, the dark side that is not easy to be irradiated or other parts that are not easily irradiated T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/06C09D133/00
Inventor 王坚顾斌沈雪锋
Owner CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
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