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Surface treatment method of silicone rubber

A technology of surface treatment and silicone rubber, which is applied in the field of rubber, can solve the problems of poor surface adhesion, improve adhesion performance, facilitate industrial application, and have a wide range of applications

Inactive Publication Date: 2019-03-19
INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on this, it is necessary to provide a surface treatment method for silicone rubber to address the problem of poor adhesion on the surface of silicone rubber. , so as to improve the adhesion of the surface of silicone rubber, making silicone rubber suitable for industrial applications, but it will not affect the performance of silicone rubber

Method used

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  • Surface treatment method of silicone rubber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Place the silicone rubber sample in an ultraviolet ozone cleaning machine, the temperature of the ultraviolet ozone cleaning machine is 25°C, the wavelength of ultraviolet light is 100nm-300nm during the ultraviolet light irradiation process, ozone is generated under the excitation of ultraviolet light, and the irradiation is 30 minutes to obtain Silicone rubber sample A1 after surface treatment.

[0061] Prepare 1 part of 3-aminopropyltriethoxysilane, 5 parts of water, and 94 parts of ethanol solution, spray the solution on the surface of the treated silicone rubber sample A1, and the spraying amount is 0.1g / cm 2 Solution, heated at 70° C. for 3 minutes to obtain silicone rubber B1 with reactive groups grafted on the surface.

[0062] Mix epoxy resin glue A and glue B at a ratio of 3:1, mix evenly, coat on silicone rubber B1, and test after curing. The results are shown in Table 1.

Embodiment 2

[0064] Place the silicone rubber sample in an ultraviolet ozone cleaning machine, the temperature of the ultraviolet ozone cleaning machine is 20°C, the wavelength of ultraviolet light is 100nm-300nm during the ultraviolet light irradiation process, ozone is generated under the excitation of ultraviolet light, irradiated for 60 minutes, and obtained Silicone rubber sample A2 after surface treatment.

[0065] Prepare 1 part of γ-glycidyl etheroxypropyl trimethoxysilane, 5 parts of water, and 94 parts of ethanol solution, spray the solution on the surface of the treated silicone rubber sample A2, and heat at 70°C for 3 minutes to obtain surface grafting Silicone rubber B2 with reactive groups.

[0066] Mix epoxy resin glue A and glue B at a ratio of 3:1, mix evenly, coat on silicone rubber B2, and test after curing at 120°C for 1 minute. The results are shown in Table 1.

Embodiment 3

[0068] Place the silicone rubber sample in an ultraviolet ozone cleaning machine. The temperature of the ultraviolet ozone cleaning machine is 20°C. During the ultraviolet light irradiation process, the wavelength of ultraviolet light is 100nm to 300nm. , irradiated for 60 minutes to obtain a surface-treated silicone rubber sample A3.

[0069] Prepare 1 part of N-aminoethyl-3-aminopropylmethyltrimethoxysilane, 5 parts of water, and 94 parts of ethanol solution, spray the solution on the surface of the treated silicone rubber sample A3, and heat it at 70°C for 3 minutes , to obtain the silicone rubber B3 with reactive groups grafted on the surface.

[0070] On the silicone rubber B3, a layer of mixed solution of diisocyanate, polyether polyol and catalyst was coated, and tested after curing. The results are shown in Table 1.

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Abstract

The invention relates to a surface treatment method of silicone rubber. The surface treatment method includes: providing silicone rubber with polar group on the surface; covering the surface of the silicone rubber with the polar group with a multifunctional compound to enable the multifunctional compound to react with the polar group to form a coating; covering the surface of the coating with a bonder to enable the binder to react with the multifunctional compound to form a bonding layer; curing the coating and the bonding layer sequentially covering the surface of the silicone rubber. The polar group is arranged on the surface of the silicone rubber, and the coating and the bonding layer are formed on the surface of the silicone rubber through sequential reaction, so that bonding performance of the surface of the silicone rubber is improved, industrial application of the silicone rubber is facilitated, and performance of the silicone rubber is unaffected.

Description

[0001] This application is a divisional application of the invention application of "Application No.: 201810688201.3, filing date: June 28, 2018, and invention title: surface treatment method for silicone rubber". technical field [0002] The invention relates to the technical field of rubber, in particular to a surface treatment method of silicone rubber. Background technique [0003] Silicone rubber can maintain elasticity for a long time at -60°C to 200°C, does not absorb or release heat during curing, has a small shrinkage ratio after curing, and has excellent electrical properties and chemical stability. It is resistant to water, ozone, and weather. Good compatibility and good performance. However, the surface of silicone rubber is mainly composed of non-polar organic groups such as Si-O bonds, Si-C bonds, and C-H bonds, which show low cohesive energy, so the interaction between silicone rubber and other materials is low, and it is not suitable for other materials. The...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/12C08J7/04C08L83/04
CPCC08J7/04C08J7/12C08J7/123C08J2383/04C08J2463/00C08J2475/08C08J2475/04C08J2475/14C08J2433/08C08J2433/02
Inventor 张成裕
Owner INST OF FLEXIBLE ELECTRONICS TECH OF THU ZHEJIANG