Multilayer water-based coating and spraying method thereof

A water-based paint and water-based technology, applied in the field of paint, can solve problems such as poor adhesion and excessive drying temperature, and achieve the effect of smooth hand feeling, increased smoothness, and easy rework

Inactive Publication Date: 2021-08-10
万辉(广州)高新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing coatings have poor adhesion when applied to plastic-metal assemblies or the drying temperature exceeds the temperature that the plastic can withstand

Method used

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  • Multilayer water-based coating and spraying method thereof
  • Multilayer water-based coating and spraying method thereof
  • Multilayer water-based coating and spraying method thereof

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Embodiment Construction

[0029] The invention provides a multi-layer water-based paint, which specifically includes a primer, a middle paint and a top paint. The primer is two-component, including A-component and B-component. Among them, component A uses water-based epoxy resin as the main resin, and component B uses water-based polyamide resin as the main resin. When using, first mix the two components, and then spray them on the surface of the workpiece. The amide resin supplemented with an adhesion promoter can undergo a chain reaction at a lower temperature and cure to form a primer layer. The primer layer has good adhesion to plastic materials and metal materials, and has good resistance Acid and alkali resistance, water boiling resistance, salt spray resistance, and strong covering ability, can cover plastic and hardware joints, easy to polish, easy to rework. A water-based epoxy resin with a high epoxy equivalent and more than 10 secondary hydroxyl groups is preferred, which is more conducive ...

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Abstract

The invention discloses a multilayer water-based coating and a spraying method thereof. The multilayer water-based coating comprises a primer, an intermediate paint and a finish paint; the component A of the primer takes water-based epoxy resin as matrix resin, the component B of the primer takes water-based polyamide resin as matrix resin, and the two components are subjected to a chemical reaction on the surface of a workpiece to form a primer layer; the intermediate paint takes waterborne polyurethane as matrix resin and is used for being sprayed and attached to the primer layer to form a connecting layer; and the component C of the finish paint takes water-based hydroxyl polyurethane as matrix resin, the component D of the finish paint takes water-based isocyanate as matrix resin, and the two components are subjected to chemical reaction on the connecting layer to form a protective layer. In the system, the primer has good adhesive force to both the metal material and the plastic material, and the intermediate paint has good interlayer binding force; and the finish paint increases the smoothness, wear resistance and elasticity of the surface, and in the whole spraying process, the drying temperature can be controlled to be not more than 80 DEG C and is below the temperature which can be borne by the plastic material.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a multi-layer water-based coating and a spraying method. Background technique [0002] Some existing product structures are composed of plastic parts and metal parts. Specifically, metal materials are used as the main body, and plastic materials are used to make some complex shapes, such as laptop casings, home appliances, and car interior decoration. This structure can improve the production efficiency of the material and reduce the production cost. [0003] The existing production process is to inject metal materials and plastic materials respectively, then spray and color the plastic parts and metal parts respectively, and finally assemble the sprayed plastic parts and metal parts into one body. In the process, it is easy to damage the paint film formed on the surface of plastic parts and metal parts, and it is also not conducive to the uniformity of the color of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D163/00C09D5/00C09D177/00C09D175/04C09D7/20B05D7/24B05D7/00B05D1/38
CPCC09D163/00C09D5/002C09D175/04C09D7/20B05D7/24B05D7/584B05D1/38B05D2504/00B05D2505/00B05D2503/00C08L77/00C08K7/26
Inventor 杨剑挥梅云峰
Owner 万辉(广州)高新材料有限公司
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