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Method for preparing ultra violet photocurable coating

A technology for curing coatings and production methods, which is applied in the direction of coatings, etc., and can solve the problems of decreased physical and chemical performance indicators of paint film adhesion, adverse effects of construction environment, and reduced curing rate, so as to achieve good construction performance, fast curing speed, and paint film. non-yellowing effect

Inactive Publication Date: 2005-01-19
HUNAN UNIV OF ARTS & SCI
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  • Description
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AI Technical Summary

Problems solved by technology

As the viscosity of linear oligomers increases with the increase of molecular weight, a large amount of reactive diluent monomers must be added for ideal construction. On the one hand, this will have adverse effects on the construction environment, and on the other hand, it will cause the curing rate to decrease and the cured film to shrink. , resulting in a decline in physical and chemical performance indicators such as paint film adhesion

Method used

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Examples

Experimental program
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Embodiment Construction

[0020] Give an embodiment below and describe in detail as follows:

[0021] 1. Preparation of star oligomers

[0022] Add 360 grams of divinylbenzene, 250 grams of n-butyllithium, and 1000 grams of triethylamine into the reaction flask, repeatedly evacuate and fill with nitrogen 8 times, react at 40°C for 1.5 hours, and inject 624 grams of styrene, Continue the reaction for 3 hours, then inject 1500 grams of methyl methacrylate, continue the reaction for 4 hours, finally inject 780 grams of butyl acrylate, continue the reaction for 5 hours, then lower the temperature to make the system temperature 15 ° C, and inject allyl bromide 484 The end-capping reaction was carried out for 7 hours, and the obtained product was washed 5 times with deionized water, and the precipitate was vacuum-dried at a drying temperature of 35° C. to constant weight, and then pulverized to obtain a UV-curable star oligomer.

[0023] Second, the preparation of UV-curable coatings

[0024] Take 600 gram...

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Abstract

The preparation method of UV light solidified paint includes the following steps: firstly, preparing star-shaped oligomer which can be solidified under the irradiation of UV light, then using 40-80 portions of star-shaped oligomer, 10-20 portions of oxypropylated neopentyl glycol diacrylate, 5-15 portions of ethyoxylated trimethylolpropane triacrylate and 3-15 portions of butyl acrylate and adding them into reactor, heating to 30-50 deg.C until the star-shaped ligomer is completly dissolved, adding levelling agent, optical initiating agent and other adjuvants and uniformly mixing them to obtain the product with good construction performance and quick solidification speed, and its paint film has excellent physical and chemical properties.

Description

Technical field: [0001] The invention belongs to an organic chemical coating, namely a method for preparing an ultraviolet light curing coating. Background technique: [0002] UV-curable coatings are characterized by high efficiency, energy saving, resource saving, and environmental protection, and are widely used in electronics, printing, construction, chemicals, automobiles, modern communication equipment and facilities, aerospace equipment and facilities, light industrial appliances, wood furniture and other fields , known as the 21st century "green industry" products at home and abroad. [0003] UV-curable coatings currently on the market are formulated from linear oligomers. As the viscosity of linear oligomers increases with the increase of molecular weight, a large amount of reactive diluent monomers must be added for ideal construction. On the one hand, this will have adverse effects on the construction environment, and on the other hand, it will cause the curing ra...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D4/02
Inventor 周诗彪刘立新张儒祥吴朝辉熊志夫
Owner HUNAN UNIV OF ARTS & SCI
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