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Single-component high-performance compound organic silicon adhesive and method for preparing same

An organic silica gel, high-performance technology, used in polymer adhesive additives, non-polymer adhesive additives, adhesives, etc., can solve the problems of dangerous transportation, complex production process, high cost, improve mechanical properties, comprehensive The effect of excellent performance and good mechanical properties

Inactive Publication Date: 2018-08-17
WUXI HAITE NEW MATERIAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the non-polarity of the molecule itself, the addition-type silicone rubber has poor adhesion when used as a potting coating or insert injection molding material.
[0003] At present, there are three main methods to improve the adhesion between silicone rubber and various materials: one is to treat the surface of the substrate with a primer, which is low in production efficiency, and more flammable solvents are used in the primer, resulting in Transportation hazards and environmental pollution; the second is to enhance the adhesion by changing the molecular structure of the base rubber, but this method is relatively complicated due to the actual production process, and the cost is relatively high; the third is to improve the adhesion by adding a tackifier. The operation is convenient and easy, but it is prone to the phenomenon that the tackifier is easy to precipitate

Method used

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  • Single-component high-performance compound organic silicon adhesive and method for preparing same
  • Single-component high-performance compound organic silicon adhesive and method for preparing same
  • Single-component high-performance compound organic silicon adhesive and method for preparing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Mix 100kg of organosiloxane containing reactive groups (polydimethylsiloxane with vinyl groups at both ends with a viscosity of 500cps (vinyl content is 0.5%) and a side chain with a viscosity of 5000cps containing ethylene base polydimethylsiloxane (vinyl content is 0.5%) mixed at a mass ratio of 1:1) and 15kg hydrogen-containing silicone oil (the side chain hydrogen accounts for the mass fraction of the hydrogen-containing silicone oil, that is, the hydrogen content is 0.8%) Add it to a planetary mixer, vacuumize and stir for 15 minutes;

[0032] (2) Add 0.02kg of inhibitor 2-methyl-3-butyn-2-alcohol, and continue vacuuming and stirring for 15 minutes;

[0033] (3) 5kgSEBS, 0.5kg terpene resin are added in the mixture of 50kg mass ratio 10:1 perchlorethylene and xylene fully dissolved, then add planetary mixer and continue to vacuumize and stir for 20min;

[0034] (4) Add 0.3 kg of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane platinum catalyst, vacuumize and stir fo...

Embodiment 2

[0036] The addition amount of the thermoplastic elastomer SEBS in step (3) is 20kg, other is identical with embodiment 1.

Embodiment 3

[0038] (1) Mix 100kg of organosiloxane containing reactive groups (polydimethylsiloxane with vinyl groups at both ends with a viscosity of 2000cps (vinyl content is 1.5%) and a side chain with a viscosity of 10000cps containing ethylene base polydimethylsiloxane (vinyl content is 1.5%) mixed at a mass ratio of 1:1) and 50kg of hydrogen-containing silicone oil (the side chain hydrogen accounts for the mass fraction of the hydrogen-containing silicone oil, that is, the hydrogen content is 0.5%) Add it to a planetary mixer, vacuumize and stir for 15 minutes;

[0039] (2) Add 0.05kg inhibitor 3-methyl-1-butyn-3-alcohol, and continue vacuuming and stirring for 15 minutes;

[0040] (3) 5kgSBS, 0.5kg hydrogenated abietol are added in the mixture of 30kg mass ratio 10:1 tetrachlorethylene and xylene and fully dissolved, then add planetary mixer and continue to vacuumize and stir for 20min;

[0041] (4) Add 0.8 kg of 1,3-divinyl-1,1,3,3-tetramethyldisiloxane platinum catalyst, vacuumi...

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Abstract

The invention discloses single-component high-performance compound organic silicon adhesive and a method for preparing the same. The single-component high-performance compound organic silicon adhesivecomprises, by weight, 100 parts of organopolysiloxane with reactive groups, 1-50 parts of cross-linking agents, 0.5-5 parts of platinum complex catalysts, 0.01-1 part of inhibitors, 1-20 parts of thermoplastic elastomers, 0.5-5 parts of tackifying resin and 30-50 parts of solvents. The single-component high-performance compound organic silicon adhesive and the method have the advantages that thesingle-component high-performance compound organic silicon adhesive is good in mechanical property and can be used for adhering materials with different thermal expansion coefficients, and cured products are good in flexibility.

Description

technical field [0001] The invention relates to the field of addition-type silicone adhesives, in particular to a single-component high-performance composite silicone adhesive and a preparation method thereof. Background technique [0002] Addition silicone rubber is a non-toxic, odorless, silicone material with excellent weather resistance and electrical insulation. Compared with condensation-type silicone rubber, addition-type silicone rubber has the advantages of no by-products in the vulcanization process, extremely small shrinkage, and deep vulcanization. It is easy to produce products with high purity, high transparency, and flame-retardant functions. One of the fastest-growing high-grade silicone varieties. At present, it has been more and more widely used in electronic appliances, machinery, automobiles, construction and other industries. However, due to the non-polarity of the molecule itself, the addition-type silicone rubber has poor adhesion when used as a pott...

Claims

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Application Information

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IPC IPC(8): C09J183/07C09J183/05C09J11/08C09J11/06
CPCC08L2205/025C08L2205/035C08L2205/04C09J11/06C09J11/08C09J183/04C08L83/04C08L53/025C08L45/00C08K5/05C08L53/02C08L93/04
Inventor 李卫东李夏倩邓庆瑞白永平殷晓芬
Owner WUXI HAITE NEW MATERIAL RES INST