Adhesive mono-component addition silicone rubber adhesive and preparation method thereof

A one-component, addition-type technology, applied in the direction of polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problems of reduced production efficiency, poor adhesion, impact, etc., to achieve good adhesion effect, the effect of good bonding

Inactive Publication Date: 2015-03-25
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The disadvantage of addition-type silicone rubber in the application is that it has poor adhesion to most substrates. This is mainly because the addition-type silicone rubber is a highly saturated non-polar rubber after vulcanization, which is outside the silicone main chain. The arrangement is a layer of non-polar organic groups, and the molecular surface energy is low, which leads to poor adhesion when used as potting, coating, and insert injection molding materials, which limits its use to a certain extent
At present, there are two main methods to improve the adhesion between silicone rubber and various materials: one is to use a primer to treat the surface of the substrate, which increases the production process and production time, reduces production efficiency, and simultaneously Most of the paints use flammable solvents, which cause transportation hazards and environmental pollution; the second is to improve the adhesion by adding adhesion promoters. This method is convenient and easy to operate. Commonly used addition-type silicone rubber adhesion promoters include ethylene But as Due to the diversity of contact substrates in the application process and the continuous improvement of the requirements for adhesion, the commonly used tackifiers can no longer meet the requirements for adhesion in the actual application process. Therefore, the research on addition-type silicone rubber adhesion promoters It has become a research hotspot in recent years. Chinese patent CN102775611A discloses a reaction product of

Method used

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  • Adhesive mono-component addition silicone rubber adhesive and preparation method thereof
  • Adhesive mono-component addition silicone rubber adhesive and preparation method thereof

Examples

Experimental program
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Example Embodiment

[0039] Example 1:

[0040] (1) Synthesis of adhesion promoter

[0041] Use free radical solution polymerization to synthesize homopolymer of 3-(methacryloxy)propyltrimethoxysilane, use dibenzoyl peroxide as initiator, ethyl acetate as solvent, and mass fraction of monomer 20%, the initiator dibenzoyl peroxide dosage is 0.5% of the monomer dosage. The specific synthesis process is to add 80% ethyl acetate into a glass reaction vessel, stir under the protection of a nitrogen atmosphere, and heat to about 78°C. When reflux occurs, add the remaining 20% ​​ethyl acetate that has been mixed uniformly beforehand. Ester, 3-(methacryloxy)propyltrimethoxysilane, the amount is a mixture of chain transfer agent tert-dodecyl mercaptan and dibenzoyl peroxide with 0.4% of monomer amount, and the dripping time is controlled at about 60min After the dropwise addition is completed, continue the heat preservation reaction for 7 hours, then reduce the temperature to 30°C and add 500ppm of polymeriza...

Example Embodiment

[0044] Example 2:

[0045] (1) Synthesis of adhesion promoter

[0046] Use free radical solution polymerization to synthesize homopolymer of 3-(methacryloxy)propyltrimethoxysilane, use dibenzoyl peroxide as initiator, ethyl acetate as solvent, and mass fraction of monomer 20%, the initiator dibenzoyl peroxide dosage is 0.5% of the monomer dosage. The specific synthesis process is to add 80% ethyl acetate into a glass reaction vessel, stir under the protection of a nitrogen atmosphere, and heat to about 78°C. When reflux occurs, add the remaining 20% ​​ethyl acetate that has been mixed uniformly beforehand. Ester, 3-(methacryloyloxy)propyltrimethoxysilane, the amount is a mixture of chain transfer agent tert-dodecyl mercaptan and dibenzoyl peroxide with the amount of monomer 0.1%, the dripping time is controlled at about 60min After the dropwise addition is completed, continue the heat preservation reaction for 7 hours, then reduce the temperature to 30°C and add 500ppm of polymer...

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PUM

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Abstract

The invention discloses an adhesive mono-component addition silicone rubber adhesive. The adhesive mono-component addition silicone rubber adhesive is prepared from the following components in parts by weight: 100 parts of vinyl polydimethyl siloxane, 1-15 parts of hydrogen-containing polysiloxane, 5-30 parts of vapor-phase method silicon dioxide, 0.1-5 parts of platinum catalysts, 0.05-2 parts of inhibiting agents and 1-10 parts of adhesion promoters. Compared with mono-component addition silicone rubber prepared by methyl acryloyloxy alkoxy silane or acryloyloxy alkoxy silane monomer serving as an adhesive promoter, the mono-component addition silicone rubber prepared by homopolymer of methyl acryloyloxy alkoxy silane or acryloyloxy alkoxy silane monomer serving as the adhesive promoter has a good adhesion effect on aluminum alloy base materials.

Description

technical field [0001] The invention relates to a silicone rubber adhesive and a preparation method thereof, in particular to a one-component addition type silicone rubber adhesive with good adhesive performance and a preparation method thereof. Background technique [0002] Addition-type silicone rubber is a type of silicone product that has developed rapidly in recent years, has high product technology content, excellent performance and high added value. Compared with condensation-type RTV silicone rubber with relatively mature technology, addition-type silicone rubber No low-molecular by-products are produced during the vulcanization process, so the addition-type RTV silicone rubber does not shrink during the vulcanization process, and has excellent aging resistance and electrical insulation after curing, and is non-toxic, high in mechanical strength, and has excellent resistance Hydrolytic stability, good low compression set, low flammability, deep vulcanization, and vul...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/05C09J11/04C09J11/06C09J11/08C08F130/08C08F2/02C08F2/06
Inventor 苏丹刘贵培潘换明王吉
Owner TONSAN ADHESIVES INC
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