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Surface treating agent for binding silastic and plastic, preparation and use method thereof

A technology of surface treatment agent and silicone rubber, which is applied in the field of silicone rubber surface treatment agent, can solve problems such as hidden safety hazards, production burial, damage to the physical structure and chemical properties of rubber, and achieve the effect of avoiding safety hazards and improving adhesive performance

Inactive Publication Date: 2009-06-24
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, using this method to activate the rubber surface will inevitably destroy the physical structure and chemical properties of the rubber, and bury a safety hazard for production.

Method used

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  • Surface treating agent for binding silastic and plastic, preparation and use method thereof
  • Surface treating agent for binding silastic and plastic, preparation and use method thereof
  • Surface treating agent for binding silastic and plastic, preparation and use method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] At normal temperature and pressure, add γ-aminopropyltriethoxysilane into the toluene solution and stir for 5 minutes to obtain a surface treatment agent for bonding silicone rubber and plastic, in which the ingredient is γ-aminopropyltriethoxy base silane 1g and toluene solution 99g.

[0018] Apply the surface treatment agent to the surface of silicone rubber by brushing, and dry it for 5 minutes under normal temperature and ventilated conditions, so that the toluene evaporates, so as to obtain a uniform coating of amino-containing silane coupling agent, and then apply α- Methyl cyanoacrylate adhesive was spot-coated on the treated silicone rubber, glued to the plastic, and cured at room temperature for 10 minutes to obtain a peel strength of 4.97MPa between the silicone rubber and the plastic.

Embodiment 2

[0020] Under normal temperature and pressure, 10g of benzene, 20g of toluene, 50g of xylene, and 18g of petroleum ether were prepared as a mixed solution, and γ-aminopropyltrimethoxysilane was added to the mixed solution, and stirred for 5 minutes to obtain a silicone rubber surface. treatment agent. Subsequent coating and bonding (using α-cyanoacrylate ethyl ester adhesive) operations are the same as in Example 1. After curing at room temperature for 10 minutes, the peel strength between the silicone rubber and the plastic is measured to be 4.55 MPa.

Embodiment 3

[0022] The method of Example 2 was repeated according to the content of each component specified in Example 3 of Table 1 below, and the test results are listed in Table 1.

[0023] The content of each component (weight

parts) and peel strength Example 1

Example 2

Example 3

Selected

Amino silane coupling agent γ-aminopropyl

Triethoxysilane γ-aminopropyl

Trimethoxysilane γ-aminopropyl

Triethoxysilane Amino silane coupling agent 1.0 2.0 4.0 benzene - 10.0 5.0 toluene 99.0 20.0 6.0 Xylene - 50.0 5.0 petroleum ether - 18.0 80.0 Peel strength (MPa) 4.97 4.55 4.03 fracture form Silicone rubber break Silicone rubber break Silicone rubber break

[0024] Table 1

[0025] From the peel strength test data of each embodiment in the above table 1, the silicone rubber treated with the silicone rubber surface treatment agent of the present invention has a considerable peel strength aft...

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Abstract

The invention relates to a surface treating agent for binding silicon rubber and plastic, a preparation method and an application method thereof. The surface treating agent is made by mixing an amino silane-containing coupling agent and an organic solvent, the content of the amino silane-containing coupling agent is 0.5-5% and the content of the organic solvent is 95-99.5% by mass percent; the organic solvent can be any one or mixture of any two or more than two of benzene, toluene, xylene and petroleum ether at any ratio. The invention has the beneficial effects that: the organic solvent can expand the high molecular silicon rubber to cause the amino silane-containing coupling agent to be easily and evenly dispersed on the surface of the silicon rubber, and can cause part of the amino silane-containing coupling agent to infiltrate into pores on the surface of the silicon rubber, thus improving the adhesiveness; and alpha-cyanoacrylate adhesive can bond with the plastic rapidly and reach a use strength which is hard to be separated, and the adhesive is completely cured after 24h.

Description

technical field [0001] The invention relates to a silicone rubber surface treatment agent, in particular to a surface treatment agent for bonding silicone rubber and plastics and a preparation and use method thereof. Background technique [0002] Silicone rubber has excellent high temperature resistance, cold resistance, weather resistance, electrical insulation and fatigue resistance, and is widely used in chemical industry, metallurgy, aerospace, light industry, electronic telecommunications and other departments. However, silicone rubber is a kind of surface inert elastomer with very low surface free energy, and the surface free energy is 20-22mJ m -2 , is a typical difficult-to-stick material, which makes it difficult to bond silicone rubber and plastic, and brings many changes to production and application. [0003] In order to solve the above-mentioned technical problems, the Chinese published patent CN1324699A with the title of "a rubber surface treatment method" dis...

Claims

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Application Information

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IPC IPC(8): C08J7/12C08J5/12C08L83/04
Inventor 樊庆春孙波郭怀兵郭嘉张良均
Owner WUHAN INSTITUTE OF TECHNOLOGY
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