Coating system applied to surface of plastic substrate and plastic product prepared by coating system

A technology for plastic substrates and plastic products, applied in coatings, epoxy resin coatings, polyurea/polyurethane coatings, etc., can solve the problems of plastic substrates or plastic parts with imperfect surfaces, insufficient adhesion, and poor durability. Achieve high hardness, improve adhesion, and excellent durability

Active Publication Date: 2018-08-24
深圳市正和忠信股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The very low process temperature of the PVD method can realize the coating of low-melting point plastics, but most of the surfaces of plastic substrates or plastic parts are not perfect. As for the application of PVD coatings, there are problems of insufficient adhesion or poor durability.
In the prior art, although the primer is applied first under the PVD coating, two-component solvent-containing primers are mostly used, which need to be manufactured by heat drying, and there are technical problems of environmental protection and high energy consumption.

Method used

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  • Coating system applied to surface of plastic substrate and plastic product prepared by coating system
  • Coating system applied to surface of plastic substrate and plastic product prepared by coating system

Examples

Experimental program
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Effect test

preparation example Construction

[0034] The preparation of the UV curable primer coating in the present invention sprays the coating on the surface of the plastic substrate by spraying, and obtains the primer coating by UV curing. The UV energy is 500-1500mJ / cm 2 , UV intensity is 80-150mW / cm 2 .

[0035] PVD coatings in the present invention were deposited using an Innova coating device from Balzers with a rotating substrate carrier. The coatings produced in the present invention passed the following functional tests:

[0036] [Adhesion test]

[0037] According to ASTM D3359-02, the 100-grid test is carried out, and the binding force test is carried out, which is divided into 1B-5B in turn:

[0038] 5B: completely smooth, without any peeling off the edge of the grid;

[0039] 4B: Small flakes peeled off, actual clear coat in the cross-hatched area. For targets, manufactured using molten metallurgy or powder metallurgy

[0040] Ti-Al and / or Ti-Si targets were used to manufacture the coating; and the coat...

Embodiment 1

[0056] A coating system applied on the surface of a plastic substrate, comprising a UV-curable primer and a wear-resistant PVD coating, wherein the UV-curable primer consists of 30 parts of silicone-modified polyurethane acrylate, 30 parts of epoxy acrylate Parts, 10 parts of trimethylolpropane triacrylate, 10 parts of pentaerythritol tetramercaptoacetate, 3 parts of photoinitiator, 1 part of auxiliary agent; the PVD coating for wear protection is Ti 0.8 al 0.2 N coating with a thickness of 1 μm;

[0057] The primer is sprayed on the surface of the plastic substrate by spraying, and the primer coating is obtained by UV curing, and the UV energy is 1000mJ / cm 2 , UV intensity is 100mW / cm 2 ; Then the plastic substrate after photocuring is coated with PVD coating by PVD process to prepare plastic products.

[0058] The prepared plastic product has a metallic luster on the surface, the adhesion is 5B, the pencil hardness can reach 5H, it has passed the 16L falling sand impact t...

Embodiment 2

[0060] A coating system applied on the surface of a plastic substrate, comprising a UV-curable primer and a wear-resistant PVD coating, wherein the UV-curable primer consists of 60 parts of silicone-modified polyurethane acrylate, 40 parts of epoxy acrylate 20 parts, 20 parts of ethoxylated trimethylolpropane triacrylate, 15 parts of trimethylolpropane tri(3-mercaptopropionate), 5 parts of photoinitiator, 1 part of auxiliary agent; PVD coating for wear protection for Ti 0.6 al 0.4 N coating with a thickness of 2 μm;

[0061] Plastic products were prepared by the same process as in Example 1.

[0062] The prepared plastic product has a metallic luster on the surface, the adhesion is 5B, and the pencil hardness can reach 5H. It has passed the 16L falling sand impact test and RCA wear resistance test for 800 times. There is no abnormality in the appearance after cycling, the adhesion is 4B level, and there is no abnormality after the chemical resistance test.

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Abstract

The invention discloses a coating system applied to the surface of a plastic substrate. The coating system comprises a UV curing primer and a wear-resistant protective PVD coating, wherein the UV curing primer comprises: 30-60 parts of organosilicone-modified urethane acrylate, 20-40 parts of epoxy acrylate, 5-20 parts of a reactive diluent, 5-20 parts of a thiol functional compound, 2-5 parts ofa photoinitiator, and 0.5-2 parts of an addition agent; the wear-resistant protective PVD coating is a TiaX(1-a)CrNsOt coating, wherein X represents Si or/and Al; a is greater than or equal to 0.5 andsmaller than 1; the sum of r, s and t is 1; and the thickness of the coating is between 0.5 microns to 5 microns. The surface of a plastic product prepared by the coating system has metallic luster,and the coating is good in adhesive force, excellent in durability, excellent in wear resistance and scratch resistance, and suitable for packaging products, craft decorations, electronics, home appliances and automobile industries and the like.

Description

technical field [0001] This application relates to the field of coatings for the surface of plastic substrates, in particular to a coating system comprising a UV-curable primer and a PVD coating for abrasion protection. Background technique [0002] For applying a metal wear-resistant layer on the surface of a substrate, the physical vapor deposition PVD method is known as a vacuum-based coating method. Physical vapor deposition technology is a technology that uses physical methods under vacuum conditions to vaporize the surface of solid or liquid materials into gaseous atoms, molecules or ions, and deposits a film with a special function on the surface of the substrate through a low-pressure gas process. , mainly including vacuum evaporation, cathode sputtering, ion plating, etc. The superhard film prepared by this technology is not only superhard, ultrathin, high temperature resistant and pollution-free, but also can meet the special properties of tools, parts and frictio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/14C09D163/10C09D1/00C08J7/04
CPCC08J7/0423C08J2463/10C08J2475/14C09D1/00C09D163/10C09D175/14C08L63/10C08L75/14
Inventor 陈明胜杜旭颖华秀菊王大洪陈江海曾德强廖生谯将陈豪
Owner 深圳市正和忠信股份有限公司
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