Composite coating material as well as a preparation method and application thereof

A composite coating and substrate technology, used in coatings, polyester coatings, epoxy resin coatings, etc., can solve the problems of aging and discoloration of coatings, and achieve strong adhesion, high flatness, and improved aging. Effects of discoloration problems

Active Publication Date: 2018-12-11
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of consumer use, the coating has the problem of aging and discoloration, especially for light-

Method used

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  • Composite coating material as well as a preparation method and application thereof
  • Composite coating material as well as a preparation method and application thereof
  • Composite coating material as well as a preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0034] Such as figure 1 As shown, the first embodiment of the present disclosure provides a composite coating material, which includes:

[0035] Substrate 4;

[0036] Primer layer 1, it is formed on the surface of substrate 4;

[0037] The color paint layer 2, which is in contact with the primer layer 1; and

[0038] The topcoat layer 3 is formed on the opposite side of the basecoat layer 1 to the basecoat layer 1 .

[0039] In the composite coating material of the present disclosure, the primer layer 1, the color paint layer 2 and the top paint layer 3 have excellent anti-aging properties, are not easy to change color, and the primer layer 1, the color paint layer 2 and the top paint layer 3 Strong binding force, not easy to fall off.

[0040] In the present disclosure, primer layer 1 may be formed on substrate 4 . The material of the primer layer 1 includes: polyurethane acrylate, epoxy acrylate oligomer, resin monomer and additives. The primer layer 1 prepared by usin...

no. 2 approach

[0074] The second embodiment of the present disclosure provides a method for preparing the composite coating material according to the first embodiment of the present disclosure, which may include the following steps:

[0075] Provide base material 4 and primer layer 1, color paint layer 2 and the raw material of topcoat layer 3;

[0076] After mixing the raw materials, primer slurry, color paint slurry and topcoat slurry are respectively obtained;

[0077] The primer slurry, the color paint slurry and the topcoat slurry are sequentially composited on the substrate 4 to obtain a composite coating material.

[0078] Furthermore, when mixing the raw materials, the prepolymer, the resin monomer, and photoinitiators and other auxiliary agents can be mixed uniformly, and then the reactive diluent can be added for dilution.

[0079] Uniformly cover the primer slurry on the surface of the substrate 4, and cure it by ultraviolet light. Generally speaking, the curing time can be 10-30...

no. 3 approach

[0092] The third embodiment of the present disclosure provides an application of the composite coating material according to the present disclosure in a terminal device. Applying the composite coating material of the present disclosure to the surface of the terminal equipment shell can improve the problem of aging and discoloration on the surface of the terminal equipment shell. Even if the shell is made into a light-colored shell, the aging resistance is still excellent. Carry out the aging test according to the method of GB / T 1865-2009. Then according to the method of GB / T 11186, the color difference of the composite coating material with different aging time is calculated, so that when ΔE<1, the aging time of the composite coating material of the present disclosure can reach more than 300h. Therefore, the composite coating material of the present disclosure can impart a long-term colorful visual effect to the housing of the terminal device.

[0093] In addition, the termin...

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Abstract

The disclosure relates to a composite coating material as well as a preparation method and application thereof. The composite coating material is prepared from a base material, a primer layer formed on the surface of the base material, a paint layer which contacts the primer layer, and a topcoat layer formed on one side of the paint layer opposite to the primer layer, wherein the primer layer is prepared from polyurethane acrylate, epoxy acrylate oligomer, a resin monomer and additives. The composite coating material disclosed in the disclosure can improve the aging and discoloration problems.Even if a composite coating of a light color system (e.g. white, light green, light pink, etc.) is used, the discoloration and aging problems can also be improved.

Description

technical field [0001] The disclosure relates to the technical field of surface coatings, in particular to composite coating materials and their preparation methods and applications. Background technique [0002] In related technologies, the coating on the surface of the terminal equipment shell is generally prepared from PU (two-component) coatings. PU coatings (polyurethane) are collectively referred to as polyurethane coatings. Curing agent) and the mixed resin formed by the B component (main agent) containing hydroxyl group (-OH). Heating for a certain period of time promotes the reaction of -NCO and -OH to cross-link and solidify to form a paint film, which can present different colors on the surface of the terminal equipment shell after spraying. However, during consumer use, the coating has the problem of aging and discoloration, especially for light-colored (white, light green, light pink, etc.) coatings, the problem of aging and discoloration is particularly seriou...

Claims

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Application Information

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IPC IPC(8): C09D175/14C09D163/10C09D167/06C09D5/16
CPCC09D5/16C09D175/14C08L63/10C08L67/06
Inventor 孟祥发刘兵孙坤
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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