Preparation method and application of high-transmittance yellowing-resistant plastic coating

A plastic coating and anti-yellowing technology, which is applied in the field of coatings, can solve the problems of restricting the development prospects of engineering plastics, easy yellowing, light transmission, poor adhesion, etc., and achieve high degassing efficiency, good system compatibility, The effect of high adhesion

Pending Publication Date: 2020-08-18
HUAIAN COLLEGE OF INFORMATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the existing plastic paint film has problems such as poor adhesion, low hardness, easy yellowing and poor light transmission, which seriously restricts its development prospects in the engineering plastics industry with high requirements for yellowing and light transmission.

Method used

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  • Preparation method and application of high-transmittance yellowing-resistant plastic coating
  • Preparation method and application of high-transmittance yellowing-resistant plastic coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] This embodiment provides a kind of high hardness, anti-yellowing plastic coating, and this coating preparation method comprises the following steps:

[0036] The first step: Weigh the wetting agent, defoamer, rheology additive, pH regulator, and deionized water according to the above weight parts; first, stir and disperse the above dispersant, defoamer and deionized water to obtain the Liquid; add rheology additive and pH adjuster to above-mentioned dispersion liquid to disperse;

[0037] The second step: weigh according to the above parts by weight: cyclopentasiloxane modified water-based polyurethane emulsion, water-based acrylic acid modified polyurethane emulsion, film-forming aid, defoamer, thickener, and the above-mentioned cyclopentasiloxane Pentadimethylsiloxane-modified water-based polyurethane emulsion and water-based acrylic acid-modified polyurethane emulsion are mixed to obtain a mixed emulsion; the above-mentioned wetting agents are sequentially added to t...

Embodiment 2

[0047] This embodiment provides a kind of high hardness, anti-yellowing plastic coating, and this coating preparation method comprises the following steps:

[0048] details as follows:

[0049] Step 1: Weigh 0.5 g of defoaming agent, 0.5 g of rheology additive, and 0.3 g of pH regulator, and take 15 g of deionized water for later use. Among them, the main component of the wetting agent is a mixture of hydrocarbon nonionic surfactants, specifically, commercially available BYK TEGO Wet 270 can be used; the commercially available TEGO AIRASE 4500 can be used as the defoamer, and its main component is mineral Oil-modified polyether ester; the rheological additive is a silicon dioxide-modified castor oil derivative, specifically commercially available TEGO AIRASE COK84; the pH regulator is an amine pH-adjusting dispersant containing 20% ​​water, and the specific The commercially available WACKER SILRES BS198 can be used; deionized water conductivity is 20μS / cm (25°C). Select a su...

Embodiment 3

[0055] This embodiment provides a kind of high hardness, anti-yellowing plastic coating, and this coating preparation method comprises the following steps:

[0056] details as follows:

[0057] Step 1: Weigh 0.7g of defoamer, 0.2g of rheology additive, and 0.4g of pH regulator, and take 14g of deionized water for later use. Among them, the main component of the wetting agent is a mixture of hydrocarbon nonionic surfactants, specifically, commercially available BYK TEGO Wet 270 can be used; the commercially available TEGO AIRASE 4500 can be used as the defoamer, and its main component is mineral Oil-modified polyether ester; the rheological additive is a silicon dioxide-modified castor oil derivative, specifically commercially available TEGO AIRASE COK84; the pH regulator is an amine pH-adjusting dispersant containing 20% ​​water, and the specific The commercially available WACKER SILRES BS198 can be used; deionized water conductivity is 20μS / cm (25°C). Select a suitable disp...

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Abstract

The invention discloses a preparation method and application of a high-transmittance yellowing-resistant plastic coating, and belongs to the technical field of paint coatings. The coating is preparedfrom the following components in parts by weight: cyclopentasiloxane modified waterborne polyurethane emulsion, waterborne acrylic acid modified polyurethane emulsion, a defoamer, a wetting agent, a coalescing agent, a defoamer, a leveling agent, a thickener, a rheological agent, a pH regulator and deionized water. The invention provides a cyclopentasiloxane modified waterborne polyurethane emulsion and a preparation method thereof. The water-based acrylic acid modified polyurethane emulsion is used as a main film-forming substance, the hardness of the obtained coating is excellent, the lighttransmittance and yellowing resistance of the obtained coating are better than those of other commercially available plastic coatings of the same type, and the surface of a plastic plate can be highlydecorated and protected. In addition, the coating has high adhesive force and excellent stain resistance in PVC (polyvinyl chloride), PC (polycarbonate) and PMMA (polymethyl methacrylate).

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a preparation method and application of a high-transparency anti-yellowing plastic coating. Background technique [0002] With the changes of the times and the continuous development of the economy, people pay more and more attention to environmental protection and health issues. Although traditional solvent-based paints have good performance, because they use a large amount of organic solvents, these solvents will volatilize into the air, so they will produce a strong pungent smell, and at the same time pose a threat to human health, which violates the sustainable The concept of development and environmental protection. The water-based paint with water as the dispersion medium has been paid attention to by people. It is an ideal product to replace the traditional solvent-based paint and is in the stage of vigorous development. Compared with traditional paints, water-based pai...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/20C09D7/44C09D7/47C09D7/65C09D7/63C09D5/16C08J7/046C08L27/06C08L33/12C08L69/00
CPCC08J2327/06C08J2333/12C08J2369/00C08J2475/04C08L2201/10C08L2205/025C08L2205/035C09D5/1662C09D175/04C09D7/20C09D7/44C09D7/47C09D7/63C09D7/65C08J7/0427C08J7/046C08L75/04C08L91/00C08L67/00C08K5/06
Inventor 王鸿翔
Owner HUAIAN COLLEGE OF INFORMATION TECH
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