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Hydrolysable protective coating composition, hydrolysable protective coating and composite protective coating layer

A technology for protective coatings and protective coatings, applied in the field of coatings, can solve the problems of environmental and worker hazards, corrosion of the anodic film of aluminum alloy substrates, unsuitable for automation, etc., to achieve the effect of improving yield

Inactive Publication Date: 2018-08-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic stripping agents are toxic substances that cause great harm to the environment and staff; alkaline solution and acid solution stripping agents can corrode the anodic film on the surface of aluminum alloy substrates
The second is to spray paint or ink that can be peeled by hand. After the protection is over, the protective paint is manually torn off. This method requires a lot of manpower and material resources and is not suitable for automation.

Method used

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  • Hydrolysable protective coating composition, hydrolysable protective coating and composite protective coating layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] 1) Preparation of hydrolyzable first coat coating

[0053] Polyvinyl alcohol-124 (purchased from Xilong Chemical Co., Ltd., the degree of polymerization is 2400, and the alcoholysis degree is 99%) 30 grams is dissolved in 500ml pure water; Sodium hydroxymethyl cellulose (purchased from Renqiu Yibang Chemical Co., Ltd.) 15 grams were dissolved in 500 ml of purified water; 2 grams of sodium silicate and 3 grams of glycerin and 1.25 grams of phosphoric acid were dissolved in 100 ml of purified water. After mixing all the above solutions, add 1.5 grams of wetting agent (purchased from Jiangsu Haian Petrochemical Factory, model is MA24P, composition is lauryl phosphate) and defoamer (purchased from Guangzhou Yuheng Chemical Materials Co., Ltd. , the model is Y-687, the composition is glycerol polyether) 1 gram is fully mixed to obtain the first coating, and finally add 1500ml of deionized water to adjust the viscosity of the first coating at 25°C to 10s.

[0054] 2) Form th...

Embodiment 2

[0065] 1) Preparation of hydrolyzable first coat coating

[0066] Polyvinyl alcohol-124 (purchased from Xilong Chemical Co., Ltd., the degree of polymerization is 2400, and the alcoholysis degree is 99%) 40 grams is dissolved in 500ml pure water; Sodium hydroxymethyl cellulose (purchased from Renqiu Yibang Chemical Industry Co., Ltd.) 25 grams were dissolved in 500ml of purified water; 4 grams of sodium silicate, 7 grams of glycerin and 3 grams of phosphoric acid were dissolved in 500 ml of purified water. After mixing all the above solutions, add 2.5 grams of wetting agent (purchased from Hai'an Petrochemical Plant, Jiangsu Province, model is MA24P, composition is lauryl phosphate) and defoamer (purchased from Guangzhou Yuheng Chemical Materials Co., Ltd. , the model is Y-687, the composition is glycerol polyether) 1.5 grams are fully mixed to obtain the first coating, and finally add 1100ml of deionized water to adjust the viscosity of the first coating at 25°C to 12s.

[0...

Embodiment 3

[0078] 1) Preparation of hydrolyzable first coat coating

[0079] Polyvinyl alcohol-124 (purchased from Xilong Chemical Co., Ltd., the degree of polymerization is 2400, and the alcoholysis degree is 99%) 35 grams is dissolved in 500ml pure water; Sodium hydroxymethyl cellulose (purchased from Renqiu Yibang Chemical Industry Co., Ltd.) 20 grams were dissolved in 500ml of purified water; 3 grams of sodium silicate, 4 grams of glycerin and 2.5 grams of phosphoric acid were dissolved in 500 ml of purified water. After mixing all the above solutions, add 2 grams of wetting agent (purchased from Jiangsu Haian Petrochemical Factory, model is MA24P, composition is lauryl phosphate) and defoamer (purchased from Guangzhou Yuheng Chemical Materials Co., Ltd. , the model is Y-687, the composition is glycerol polyether) 1.3 grams are fully mixed to obtain the first coating, and finally add 1200ml of deionized water to adjust the viscosity of the first coating at 25°C to 11s.

[0080] 2) F...

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Abstract

The invention relates to the field of coatings and discloses a hydrolysable protective coating composition, hydrolysable protective coating and a composite protective coating layer. The hydrolysable protective coating composition comprises polyvinyl alcohol, cellulose compounds, silicates, glycerol, phosphoric acid and a wetting agent, wherein the cellulose compounds include one or more of sodiumcarboxymethyl cellulose, potassium carboxymethyl cellulose, sodium hydroxyethyl cellulose, and potassium hydroxyethyl cellulose. Through the hydrolysable protective coating composition, the hydrolysable protective coating and the composite protective coating layer which are environmentally friendly and suitable for automatic demolding can be provided.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a hydrolyzable protective coating composition and its coating and composite protective coating. Background technique [0002] In the prior art, there are mainly two technical solutions to realize the protective coating. The first one is to spray paint or ink, and after the protection is completed, an organic release agent, or an alkali solution or an acid solution is used as a release agent. However, organic stripping agents are toxic substances that cause great harm to the environment and staff; alkaline solution and acid solution stripping agents can corrode the anodic film on the surface of the aluminum alloy substrate. The second is by spraying hand-tearable paint or ink. After the protection is over, the protective paint is manually torn off. This method requires a lot of manpower and material resources and is not suitable for automation. [0003] Therefore, there is a need for a pr...

Claims

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Application Information

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IPC IPC(8): C09D129/04C09D101/28C09D163/10C09D7/61C09D7/63
CPCC09D129/04C08L2205/03C09D163/10C08L1/284C08K13/02C08K3/34C08K5/053C08K2003/329C08K5/521C08L71/02C08K3/346
Inventor 罗富华赵长涛王继厚陈梁
Owner BYD CO LTD
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