Preparation method of low-shrinkage ultraviolet curing coating

A technology of curing coatings and ultraviolet light, applied in the direction of polyurea/polyurethane coatings, coatings, etc., can solve the problems of poor film flexibility and large shrinkage rate, and achieve reduced curing shrinkage, high moisture affinity, and increased The effect of flexibility

Inactive Publication Date: 2018-07-03
常州万博金属构件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is to provide a method for preparing a low-shrinkage UV-curable coating for the defects that the UV-curable coating has a large shrinkage rate during curing, which will lead to poor flexibility of the paint film.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021]Put 700mL of sodium aluminate solution with a mass fraction of 20% into a plastic tank, and pass carbon dioxide gas into the plastic tank at a rate of 20mL / min for 40min. In the flat plate filter, filter the filtrate to obtain the filter residue, put the filter residue in an oven, heat up to 90°C, and dry for 4 hours to obtain aluminum hydroxide powder; put the aluminum hydroxide powder in a high-pressure air flow machine, air flow Pulverize for 10 minutes to obtain superfine aluminum hydroxide powder with a particle size of 50 μm. Pour 200 g of superfine aluminum hydroxide powder into 500 mL of sodium silicate solution with a mass fraction of 30% to obtain a colloidal solution. Put the colloidal solution in Disperse at a high speed at a speed of 3000r / min in a high-speed disperser to obtain a dispersion glue; in parts by weight, mix 60 parts of polystyrene and 30 parts of vinyl acetate resin to obtain a mixed resin, and pour the mixed resin into a container with 60 In a...

example 2

[0023] Put 750mL of sodium aluminate solution with a mass fraction of 20% into a plastic tank, and pass carbon dioxide gas into the plastic tank at a rate of 25mL / min for 42min. Put it in a flat plate filter, filter and remove the filtrate to obtain the filter residue, put the filter residue in an oven, heat up to 95°C, and dry for 4.5 hours to obtain aluminum hydroxide powder; put the aluminum hydroxide powder in a high-pressure air flow machine , airflow pulverization for 12min to obtain superfine aluminum hydroxide powder with a particle size of 70 μm. Pour 210g of superfine aluminum hydroxide powder into 525mL of sodium silicate solution with a mass fraction of 30% to obtain a colloidal solution. The liquid is placed in a high-speed disperser and dispersed at a high speed of 3150r / min to obtain a dispersion glue; in parts by weight, 65 parts of polystyrene and 35 parts of vinyl acetate resin are mixed to obtain a mixed resin, and the mixed resin is poured into a container ...

example 3

[0025] Put 800mL of sodium aluminate solution with a mass fraction of 20% into a plastic tank, and pass carbon dioxide gas into the plastic tank at a rate of 30mL / min for 45min. In the flat plate filter, remove the filtrate by filtering to obtain the filter residue, put the filter residue in an oven, heat up to 100°C, and dry for 5 hours to obtain aluminum hydroxide powder; put the aluminum hydroxide powder in a high-pressure air flow machine, air flow Pulverize for 15 minutes to obtain superfine aluminum hydroxide powder with a particle size of 80 μm. Pour 220 g of superfine aluminum hydroxide powder into 550 mL of sodium silicate solution with a mass fraction of 30% to obtain a colloidal solution. Put the colloidal solution in Disperse at a high speed of 3300r / min in a high-speed disperser to obtain a dispersion glue; by weight, 70 parts of polystyrene and 40 parts of vinyl acetate resin are mixed to obtain a mixed resin, and the mixed resin is poured into a container with 70...

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Abstract

The invention discloses a preparation method of a low-shrinkage ultraviolet curing coating, and belongs to the technical field of coating preparation. According to the invention, when carbon dioxide is used to carry out carbonation decomposition on a sodium aluminate solution for preparing the aluminum hydroxide powder, the caustic ratio of the sodium aluminate solution is reduced, and in an ultraviolet curing coating, the gap filling effect of aluminum hydroxide particles to the modified epoxy acrylic resin particles is better. In a curing process of the ultraviolet curing coating provided bythe invention, partial aluminum hydroxide particles in a dispersion glue solution react with sodium silicate, so that nano silicon dioxide is generated; the surfaces of the resin particles are coatedby the nano silicon dioxide particles, so that the curing efficiency of the coating is improved; according to the modified epoxy acrylic resin, a low-shrinkage additive taking polystyrene which has asimilar curing shrinkage rate as a main material is used, the steric hindrance is increased during curing shrinkage, and a paint film has a certain tensile property through a net structure, so that the curing shrinkage rate of the ultraviolet curing coating is reduced, the flexibility of the paint film is increased, and the application prospect is wide.

Description

technical field [0001] The invention discloses a preparation method of a low-shrinkage ultraviolet light curing coating, which belongs to the technical field of coating preparation. Background technique [0002] UV-curable coating is a kind of coating that uses ultraviolet light to trigger rapid polymerization, cross-linking and other reactions of chemically active liquid materials to quickly cure and form a film. It is a high-efficiency and environmentally friendly curing coating, which has the advantages of fast curing speed, low curing temperature, high production efficiency, energy saving, no organic solvent, and suitable for assembly line production. Since it does not contain organic solvents, the pollution of volatile organic compounds to the environment is greatly eliminated. The first patent for UV-curable coatings was born in 1947. After more than half a century of development, UV-curable coatings have become a relatively mature technology. Especially with the impr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D7/62C09D7/61C09D7/65C08F291/06C08F212/08C08G59/17C08F290/00C08F216/12C08G18/76C08G18/63
CPCC09D175/04C08F257/02C08F263/04C08F290/00C08G18/635C08G18/7614C08G59/1466C08K2003/2227C08K2201/011C08L2205/025C08L51/003C08K9/00C08K3/22C08K3/36C08F212/08C08F216/125
Inventor 谭春容何少雄陈可
Owner 常州万博金属构件厂
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