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Spraying process for water-based UV finishing coat

A topcoat, water-based technology, applied in the direction of surface coating liquid device, coating, pretreatment surface, etc., can solve the problems of topcoat peeling off, partial crosslinking of topcoat, embrittlement, etc., to increase the degree of fit Effect

Inactive Publication Date: 2019-01-04
深圳市前海奇迹新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spraying process of the existing water-based UV topcoat has the disadvantage that it is difficult to take into account both
Usually the light-curing rate is high, and the formed topcoat will be partially cross-linked, resulting in topcoat peeling and brittle cracking.

Method used

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  • Spraying process for water-based UV finishing coat
  • Spraying process for water-based UV finishing coat
  • Spraying process for water-based UV finishing coat

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] 10 parts of deionized water, 0.4 parts of polyether modified polydimethylsiloxane solution, 0.1 part of propisophorone, 0.5 parts of N-benzylmaleimide, 5 parts of glycerol, ethylene butene 1 part of copolymer, add to GFJ-0.4 high-speed disperser, heat to 45 o C is dispersed at 600r / min for 10min, and the rotating speed is reduced to 300r / min. Add 70 parts of polyurethane acrylate, 0.2 part of nano silicon dioxide, 15 parts of trifluoromethyl acrylate, and 2.5 parts of film-forming aid. Heat up to 60 o C Disperse at this speed for 15 minutes, and finally drop to room temperature and add 3 parts of 4-vinylbenzophenone to disperse for 30 minutes to obtain a UV coating solution.

Embodiment 2

[0069] 10 parts of deionized water, 0.4 parts of polyether modified polydimethylsiloxane solution, 0.1 part of propisophorone, 0.5 parts of N-benzylmaleimide, 5 parts of glycerol, ethylene butene 1 part of copolymer, add to GFJ-0.4 high-speed disperser, heat to 45 o C is dispersed at 600r / min for 10min, then the rotating speed is reduced to 300r / min, 70 parts of polyurethane acrylate, 0.2 part of nano silicon dioxide, 15 parts of pentafluoroethyl acrylate and 2.5 parts of film-forming aid are added. Heat up to 60 o C Disperse at this speed for 15 minutes, and finally drop to room temperature and add 3 parts of 4-vinyl-4'-methoxybenzophenone to disperse for 30 minutes to obtain a UV coating solution.

Embodiment 3

[0071] 10 parts of deionized water, 0.4 parts of polyether modified polydimethylsiloxane solution, 0.1 part of propisophorone, 0.5 parts of N-benzylmaleimide, 5 parts of glycerol, ethylene butene 1 part of copolymer, add to GFJ-0.4 high-speed disperser, heat to 45 o C was dispersed at 600r / min for 10min, then the rotating speed was reduced to 300r / min, 70 parts of polyurethane acrylate, 15 parts of trifluorohexyl acrylate, 0.2 parts of nano silicon dioxide, and 2.5 parts of film-forming aids were added. heated to 60 o C Disperse at this speed for 15 minutes, and finally drop to room temperature and add 3 parts of 4-vinyl-4'-methylbenzophenone to disperse for 30 minutes to obtain a UV coating solution.

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Abstract

The invention discloses a spraying process for water-based UV finishing coat. The spraying and curing process comprises the following steps of 1 preheating, 2 spraying, and 3 curing. In the step 1, abase material is heated to ensure that the temperature of the surface of the finishing coat of the base material is kept between 50 DEG C and 60 DEG C, and is maintained for 0.5-2h; in the step 2, thespraying pressure is 1.15-1.25 MPa, the spraying speed is 10-13 mm / s, the finishing coat is quantitatively and uniformly sprayed on an injection molding panel in a continuous mode, the sprayed base material is placed in a room to be dried for 0.2-3h, the temperature in the room to be dried is controlled to be 20-28 DEG C, and the humidity is controlled below 30% rh; and in the step 3, the ultraviolet light capacity of the base material is 400-800 J, the vertical distance between an ultraviolet lamp tube and the surface of the base material is controlled below 20 cm, the curing temperature is25-40 DEG C, the curing is carried out for 2-50 minutes, and curing is carried out for 2-30 minutes at the temperature of 40-70 DEG C. According to the spraying process, the curing time of the water-based UV finishing coat can be greatly shortened, and the coating can be cured within 10 minutes on the base material.

Description

technical field [0001] The invention relates to a water-based UV topcoat spraying process. Background technique [0002] Water-based UV light-curing coating is a new generation of light-curing coating that has recently emerged. It also has the advantages of fast curing speed, high production efficiency, and high paint film fullness. At the same time, water-based solvents are used instead of organic solvents, which greatly reduces VOC. The volatility is very good in line with the contemporary environmental protection requirements. [0003] UV light curing means that under the irradiation of ultraviolet light, the photoinitiator absorbs the radiation energy of ultraviolet light and then splits into free radicals, triggering the polymerization, cross-linking and grafting reaction of the prepolymer, and curing into a three-dimensional structure in a short time. Reticular high molecular polymer, obtained the development history of hardened film, the essence is to realize chemica...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D7/24B05D3/06B05D3/02C09D175/14C09D7/62
CPCB05D7/24B05D3/0218B05D3/067B05D2401/20B05D2503/00C09D7/62C09D175/14C08L23/0815C08K9/04C08K3/36
Inventor 杨年富
Owner 深圳市前海奇迹新材料有限公司