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Preparation method for photo-curing coating compound

A technology of light-curing coatings and compositions, applied in polyurea/polyurethane coatings, coatings, etc., can solve the problems of slow speed, achieve good weather resistance, eliminate oxygen resistance effect, and excellent mechanical properties

Inactive Publication Date: 2018-01-19
CHENGDU NASHUO TECH
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Problems solved by technology

[0003] However, in the prior art, the rate of direct curing by light is relatively slow, and many curing initiations require higher temperatures or high-intensity light sources. In order to speed up the curing rate and improve the degree of curing, auxiliary heating is often used in the curing process

Method used

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Embodiment Construction

[0014] A preparation method of photocurable coating composition, comprises the following steps:

[0015] (1) Stir and mix trimethylolpropane triacrylate, trifluoroethyl acrylate, hydroxypropyl methacrylate, and α-hydroxyalkylphenone at 20~30°C;

[0016] (2) Add nano-silica and sodium sulfate decahydrate into tetrahydrofuran, and disperse by ultrasonic for 10-60 minutes;

[0017] (3) Mix the liquid obtained in step (1) with step (2), then add mercaptopropylmethyldimethoxysilane, heat up to 100~110°C and reflux for 60 minutes, then continue to heat up and concentrate the liquid to 1 / 4 volume, then add hydroxypropyl methacrylate when the temperature is lowered to 30~40°C, mix well and stir at 150~180°C for 30~60min;

[0018] (4) Add carbon nanotubes, silane coupling agent and industrial dextrin to the mixture obtained in step (3), stir at 150~180°C for 15~30min; after cooling, add dibutyltin dilaurate and isophor Ketone diisocyanate, after mixing evenly, store the product in th...

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Abstract

The invention discloses a preparation method for a photo-curing coating compound. The method comprises the following steps: (1) uniformly mixing and stirring trimethylolpropane triacrylate, trifluoroethyl acrylate, hydroxypropyl methacrylate and alpha-hydroxyalkyl benzophenone at 20-30 DEG C; (2) adding nanometer silicon dioxide and sodium sulfate decahydrate into tetrahydrofuran and ultrasonically dispersing; (3) mixing and then adding 3-mercaptopropylmethyldimethoxysilane, rising temperature, backflowing and then concentrating the liquid to 1 / 4 volume, reducing the temperature and then adding hydroxypropyl methacrylate and stirring for 30-60min at 150-180 DEG C; (4) adding carbon nanotube, industrial dextrin and silane coupling agent, stirring for 15-30min at 150-180 DEG C and lastly adding dibutyltin dilaurate and isophorone diisocyanate, thereby acquiring the photo-curing coating compound. The mechanical properties are excellent after the coating prepared according to the inventionis cured and the coating can be quickly cured under low temperature.

Description

technical field [0001] The present invention relates to the field of photocurable coatings. Background technique [0002] Photocurable coatings, also known as photosensitive coatings, are usually obtained by using ultraviolet light as the energy source to trigger the reaction of coating components. Photocurable coatings do not need to be heated when used, and can be used on flammable substrates such as paper, plastic, leather and wood. It can quickly solidify into a film, and its curing time is short, the curing temperature is low, and the volatile matter is low, which can save a lot of energy and resources, and is pollution-free and high-efficiency. [0003] However, in the prior art, the rate of direct curing by light is relatively slow, and many curing initiations require higher temperatures or high-intensity light sources. In order to speed up the curing rate and improve the degree of curing, auxiliary heating is often used in the curing process. Contents of the invent...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D7/61C08G18/62C08G18/67
Inventor 黄波
Owner CHENGDU NASHUO TECH
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