Room-temperature vulcanized silicone rubber adhesive and preparation method thereof

A technology of room temperature vulcanization and silicone rubber, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of low light transmittance, achieve good storage performance, excellent mechanical properties, and good light transmittance Effect

Active Publication Date: 2015-06-17
SHENZHEN VICTORY ON TRUST NEW MATERIAL TECHCO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a room temperature vulcanized silicone rubber adhesive, which aims to solve the technical problem of low light transmittance of the existing room temperature vulcanized silicone rubber adhesive

Method used

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  • Room-temperature vulcanized silicone rubber adhesive and preparation method thereof
  • Room-temperature vulcanized silicone rubber adhesive and preparation method thereof
  • Room-temperature vulcanized silicone rubber adhesive and preparation method thereof

Examples

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Effect test

preparation example 1

[0028] The transparent base material of the present invention is made by the following steps:

[0029] (1), combine 100 parts of hydroxyl terminated polydimethylsiloxane with a viscosity of 5000-50000mPa.s, 5-10 parts of hexamethyldisilazane, 1-2.5 parts of distilled water and 15-25 parts of The fumed silica is added to the vacuum kneader, and the above-mentioned materials are heated to 90~150℃ and then vacuum kneaded for 4~6 hours;

[0030] (2), heat the material after vacuum kneading to 150~180 ℃, vacuumize for 2~6 hours, remove low molecular weight, water content and excess hexamethyldisilazane, cool it for later use, thereby making transparent base material.

Embodiment 1

[0032] The room temperature vulcanization silicone rubber adhesive of the present invention is made by the following steps:

[0033] (1), add 333 parts of transparent base materials prepared in Preparation Example 1 and 667 parts of hydroxyl-terminated polydimethylsiloxane with a viscosity of 5000 mPa.s into the reaction kettle, start stirring, and the stirring speed is 300 to 500 rpm / min, set the oil temperature of the reaction kettle to be 140~160 ℃, stir and heat up;

[0034] (2), when the material temperature rises to 140~160 ℃, constant temperature stirring for 2 hours;

[0035] (3) After the constant temperature stirring is completed, vacuum dehydration treatment is carried out, the vacuum pressure value is -0.09~-0.1MPa, and after stirring and dehydration under vacuum for 2 hours, the material is cooled to room temperature to obtain the first mixture;

[0036] (4), in the anhydrous state at room temperature, add 72 parts of a mixture of methyl triacetoxy silane and et...

Embodiment 2

[0039] The room temperature vulcanization silicone rubber adhesive of the present invention is made by the following steps:

[0040] (1), add 466.7 parts of transparent base material and 533.3 parts of hydroxyl-terminated polydimethylsiloxane with viscosity of 1500mPa.s obtained in Preparation Example 1 into the reaction kettle, start stirring, and the stirring speed is 300~500 rpm / min, set the oil temperature of the reaction kettle to be 140~160 ℃, stir and heat up;

[0041] (2), when the material temperature rises to 140~160 ℃, constant temperature stirring for 2 hours;

[0042] (3) After the constant temperature stirring is completed, vacuum dehydration treatment is carried out, the vacuum pressure value is -0.09~-0.1MPa, and after stirring and dehydration under vacuum for 2 hours, the material is cooled to room temperature to obtain the first mixture;

[0043] (4), in the anhydrous state at room temperature, add 68.8 parts of a mixture of methyl triacetoxy silane and eth...

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Abstract

The invention discloses a room-temperature vulcanized silicone rubber adhesive. The room-temperature vulcanized silicone rubber adhesive comprises the following components in parts by weight: 300-700 parts of hydroxy-terminated polydimethylsiloxane with the viscosity of 750-80000 mPa.s, 300-700 parts of a transparent base material, 60-80 parts of a crosslinking agent, and 0.6-2.5 parts of a catalyst, wherein the transparent base material comprises the following components in parts by weight: 100 parts of hydroxy-terminated polydimethylsiloxane with the viscosity of 500-50000 mPa.s, 15-35 parts of gas phase white carbon black, 5-10 parts of a hydroxyl processor, and 1-2.5 parts of distilling water. The invention additionally discloses a preparation method of the room-temperature vulcanized silicone rubber adhesive. The luminousness of the room-temperature vulcanized silicone rubber adhesive is 93-95%, the average tear strength is 12.99 KN/m, the average tensile strength is 3.38 MPa, the average elongation is 386% and the surface drying time is 4-10 minutes.

Description

technical field [0001] The invention relates to the field of adhesives, in particular to a room temperature vulcanized silicone rubber adhesive and a preparation method thereof. Background technique [0002] At present, the RTV silicone rubber adhesive is based on linear polysiloxane, and the molecular backbone of the linear polysiloxane is alternately composed of silicon and oxygen atoms. The energy is much higher, so silicone rubber has high heat resistance and can be used in a wide working temperature range (50 ° C ~ 300 ° C). It has been widely used in aerospace, automobile, machinery and other aspects. However, the light transmittance of the existing room temperature vulcanized silicone rubber adhesive is too low to achieve transparent bonding, thereby affecting the transparent effect of the bonded object and limiting its application. SUMMARY OF THE INVENTION [0003] The main purpose of the present invention is to provide a room temperature vulcanized silicone rubb...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06
Inventor 陈少鹏
Owner SHENZHEN VICTORY ON TRUST NEW MATERIAL TECHCO LTD
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