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Isocyanate modified two-component silicon rubber adhesive and preparation method thereof

A technology of isocyanate and polyisocyanate, which is applied in the field of two-component silicone rubber adhesives and its preparation, can solve the problems of low adhesion and body performance, affecting the adhesion performance of silicone rubber, low adhesion, etc., and achieve good adhesion performance , increase the strength of the body, and the effect of simple production process

Inactive Publication Date: 2011-04-13
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Because the two-component silicone rubber adhesive has the advantage of fast curing, but the curing speed and the bonding performance are a pair of contradictions, the acceleration of the curing speed will affect the bonding performance of silicone rubber; it is generally believed that the adhesiveness of the two-component silicone rubber adhesive Obviously lower than the one-component silicone rubber adhesive, the current two-component silicone rubber adhesive on the market uses A component as α, ω-dihydroxypolydimethylsiloxane + filler + crosslinking agent; B component is made of catalyst Two-component silicone rubber adhesive, the adhesiveness and body performance of the two-component silicone rubber adhesive is lower than the needs of the market, and cannot meet the needs of substrates such as PVC, ABS, and PPO

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The synthesis method steps of component A: 100 parts of α, ω-dihydroxy polydimethylsiloxane, 50 parts of heavy calcium carbonate, 100 parts of silicon micropowder, and 10 parts of titanium dioxide are added to the stirring In the kettle, fully stir at a certain stirring rate (vacuum degree, temperature, stirring rate) under the conditions of vacuum degree > -0.09MPa and temperature 4°C ~ 30°C. After the stirring is complete, add 0.8 parts of water and stir evenly. After continuing, add 10 parts of fumed silicon dioxide in 2 times, and after fully stirring, a uniform white component A is obtained. The density of component A is 1.38g / cm 3 .

[0034] The synthetic method step of B component:

[0035] 1. Synthesis of isocyanate-modified silane coupling agent: react 100 parts of polypropylene glycol diol with a molecular weight of 1000 and 24.4 parts of isophorone diisocyanate at 80°C for 5 hours to obtain a long-chain polyurethane prepolymer; Cool to below 20°C, gradually...

Embodiment 2

[0040] The synthetic method step of A component:

[0041] Add 100 parts of α, ω-dihydroxypolydimethylsiloxane, 30 parts of light calcium carbonate, 100 parts of white corundum, and 10 parts of ferric oxide into the stirring tank with a viscosity of 3000 mPa·s. Vacuum degree>-0.09MPa, under the condition of temperature 4℃~30℃, fully stir at a certain stirring rate (vacuum degree, temperature, stirring rate are the same), add 4 parts of water after stirring completely, and get a uniform system after stirring The red component A, test the density of component A is 1.30g / cm 3 .

[0042] The synthetic method step of B component:

[0043]1. Synthesis of isocyanate-modified silane coupling agent: react 100 parts of polypropylene glycol diol with a molecular weight of 2000 and 84 parts of hexamethylene diisocyanate at 80°C for 5 hours to obtain a long-chain polyurethane prepolymer; Cool to below 20°C, gradually add a total of 165 parts of γ-aminopropyltriethoxysilane, and completel...

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Abstract

The invention discloses an isocyanate modified two-component silicon rubber adhesive and a preparation method thereof. The adhesive comprises a component A and a component B which are prepared at the vacuum degree of more than -0.09MPa and the temperature of between 4 and 30 DEG C. A method for preparing the component A comprises the following steps of: (1) adding 100 weight parts of alpha, omega-dihydroxy polydimethylsiloxane, 0 to 500 weight parts of solid filler and 0 to 20 weight parts of pigment into a stirring kettle and fully stirring; (2) adding 0 to 5 weight parts of water and fully stirring; and (3) adding 0 to 50 weight parts of fumed silica in batches. A method for preparing the component B comprises the following steps of: (1) preparing an isocyanate modified silane coupling agent; (2) adding 10 to 50 weight parts of methyl silicone oil, 2 to 20 weight parts of cross-linking agent and 0 to 35 weight parts of solid filler which is dried and dehydrated at a high temperatureinto a reaction kettle and fully stirring; (3) adding 0 to 10 weight parts of silane coupling agent, 10 to 40 weight parts of isocyanate modified silane coupling agent and 0 to 3 weight parts of catalyst and fully stirring; and (4) adding 0 to 10 weight parts of fumed silica in batches and fully stirring.

Description

technical field [0001] The invention relates to a two-component silicone rubber adhesive and a preparation method, in particular to an isocyanate-modified two-component silicone rubber adhesive and a preparation method. Background technique [0002] Because the two-component silicone rubber adhesive has the advantage of fast curing, but the curing speed and the bonding performance are a pair of contradictions, the acceleration of the curing speed will affect the bonding performance of silicone rubber; it is generally believed that the adhesiveness of the two-component silicone rubber adhesive Obviously lower than the one-component silicone rubber adhesive, the current two-component silicone rubber adhesive on the market uses A component as α, ω-dihydroxypolydimethylsiloxane + filler + crosslinking agent; B component is made of catalyst Two-component silicone rubber adhesive, the two-component silicone rubber adhesive adhesiveness and body performance are lower than the needs...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J183/04C09J11/04C09J11/06C09J11/08
Inventor 潘换明李印柏林新松翟海潮
Owner TONSAN ADHESIVES INC
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