Dual-curing water-based coating as well as preparation method and construction process thereof

A water-based coating, dual-curing technology, applied in polyurea/polyurethane coatings, coatings, devices for coating liquids on surfaces, etc., can solve problems such as high pollution and high VOC in oil-based coatings

Active Publication Date: 2020-10-30
HUNAN SOKAN NEW MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a dual-curing water-based coating and its preparation method and const

Method used

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  • Dual-curing water-based coating as well as preparation method and construction process thereof
  • Dual-curing water-based coating as well as preparation method and construction process thereof
  • Dual-curing water-based coating as well as preparation method and construction process thereof

Examples

Experimental program
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Effect test

Embodiment 1～6

[0050] For the dual-curing water-based coatings of Examples 1-6, component A includes the following components in weight percent, which are listed in Table 1.

[0051] The defoaming agent is a mineral oil dispersant; the pH regulator is 2-amino-2-methyl-1-propanol; the wetting agent is a polysiloxane-polyether copolymer wetting agent.

[0052] The dual curing water-based coating formulation of table 1 embodiment 1~6

[0053]

[0054]

[0055] According to the formulation dosage of the specific examples in Table 1, weigh aliphatic hydroxyl functional polycarbonate polyurethane dispersion, metal carboxylate drier, 3000 mesh talcum powder, precipitated silica matting powder, polysiloxane Mix alkane-polyether copolymer wetting agent and mineral oil dispersant, stir evenly, and disperse at 2000rpm for 20min until the fineness is less than 20μm;

[0056] Then add water-based epoxy emulsion, non-ionic aliphatic polycarbodiimide aqueous dispersion, water-based blocked isocyanat...

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Abstract

The invention discloses a dual-curing water-based coating as well as a preparation method and a construction process thereof. The coating is used for simultaneously coating a metal and plastic composite base material. The coating comprises a component A and a component B, wherein the component A comprises 30%-50% of waterborne polyurethane resin, 20%-40% of a waterborne epoxy emulsion, 0.3%-0.6% of a waterborne drier, 2%-5% of a waterborne polycarbodiimide cross-linking agent, 2%-5% of a waterborne pigment filler, 2%-6% of a hydrophilic solvent, 3%-6% of silicon dioxide, 2%-10% of a water-based blocked isocyanate cross-linking agent, 5%-10% of deionized water and 0.7%-3.4% of a water-based auxiliary agent; the component B comprises a curing agent; the mass ratio of the component A to the component B is 100:(3-6). According to the dual-curing water-based coating, the water-based polyurethane resin and the water-based epoxy emulsion serve as main film-forming resin, a coating layer capable of meeting the requirements of a plastic base material and a metal base material at the same time is formed by utilizing different reaction degrees of the water-based blocked isocyanate cross-linking agent and the curing agent to the temperature, and the dual-curing water-based coating has good adhesion performance and chemical resistance.

Description

technical field [0001] The invention relates to the field of water-based PU, in particular to a dual-curing water-based paint. In addition, the present invention also relates to a preparation method and a construction process including the above-mentioned dual-curing water-based paint. Background technique [0002] With the improvement of living standards, plastic products are used more and more widely. At present, people not only pursue good performance, but also pursue fashionable appearance. Using paint to treat the shell of plastic products is the most cost-effective method. For electronic products using metal materials, they are also very popular because of their high strength, mature processing, strong texture, and higher-end performance. . Both plastic materials and metal materials have their own advantages and disadvantages, so when actually selecting materials, a composite material composed of two materials will be used at the same time. Focus on. Due to the exc...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D7/61C09D7/65C09D7/63B05D7/14B05D3/02C08J7/04
CPCC09D175/04C09D7/61C09D7/69C09D7/65C09D7/63C08J7/0427B05D7/14B05D3/02C08L2205/03C08L2312/00C08K2201/005C08L63/00C08L79/00C08K13/02C08K3/36C08K3/34C08K5/29C08K5/098
Inventor 陈旭王卫国曾煜李平李玉良余辉良符饶生缪培凯吕国强杨波凌云剑
Owner HUNAN SOKAN NEW MATERIAL
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