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Dual curing coating

A dual curing and coating technology, applied in the direction of coating, etc., can solve the problems of inability to obtain sufficient radiation intensity, contradiction between coating hardness and toughness, and toughness cannot be guaranteed, so as to overcome the difficulty in balancing hardness and flexibility, and the shrinkage stress of the system The effect of reducing and improving chemical resistance

Inactive Publication Date: 2007-03-07
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
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Effect test

Embodiment 1

[0027] In a four-necked flask equipped with a stirrer, condenser, thermometer and dropping funnel, add 100g epoxy F-51. Under stirring at 100℃, add 37g acrylic acid and 0.5 dropwise from the dropping funnel at a fixed speed within 30 minutes. g A mixture of N,N-dimethylethanolamine and 0.2g p-methoxyphenol. The mixture is stirred and kept for reaction at ≤100°C. When the acid value is reduced to 5mgKOH / g, the temperature is lowered to 70°C and the material is discharged to obtain the active oligomer epoxy acrylate resin.

Embodiment 2

[0029] In a four-necked flask with a stirrer, condenser, thermometer and dropping funnel, add 100g polyether 210. Under stirring at 40°C, add 35g 2,4-volume TDI from the dropping funnel at a fixed speed within 30 minutes. , Keep it at this temperature for three hours, then add a mixture of 28 g of hydroxypropyl acrylate, 0.014 g of dibutyltin dilaurate and 0.16 g of p-methoxyphenol. The mixture was stirred at about 90°C for 6 hours to keep warm, and when the NCO content was reduced to 0.5%, the temperature was lowered to 60°C, and 5 g of isopropanol was added and stirred to obtain an active oligomer polyurethane acrylate resin.

Embodiment 3

[0031] In a four-necked flask equipped with a stirrer, condenser, thermometer and dropping funnel, add 150g of xylene. Under stirring at 100℃, add 35g of butyl acrylate and 41g from the dropping funnel at a fixed speed within 2h. A mixture of methyl methacrylate, 49g styrene, 15g acrylic acid, 1.2g benzoyl peroxide, the mixture is stirred at ≤110°C for 5 hours, the temperature is lowered to 90°C, 29g glycidyl methacrylate, 0.4g pair Methoxyphenol and 0.7g N,N-dimethylethanolamine were 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 invention relates to a dual-curing coating, which is particularly suitable for wood and metal substrates. Background technique [0002] At present, the application fields of UV-curable coatings are becoming 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; second, only UV light When it is directly irradiated to the coating film to obtain sufficient radiation intensity, the cured coating film can achieve the best performance indicators. For irregular workpieces, the negative surface that is not easy to be irradiated or other ...

Claims

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Application Information

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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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