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Adhesive addition liquid silicone rubber

A liquid silicone rubber and addition molding technology, which is applied in the chemical industry, can solve the problems of lack of mechanical strength, non-vulcanization, high price, etc., and achieve the effect of uncomplicated synthesis process, good bonding performance and high mechanical strength

Active Publication Date: 2014-02-19
深圳市红叶杰科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, better quality primers are not only expensive but also not universal
For example, Wacker’s primer G-790 does not work on some substrates, and the price is more than 1,000 yuan per kilogram. Many silane coupling agents on the market are easy to cause damage to the platinum catalyst used in addition-type liquid silicone rubber. Poisoning causes unvulcanized raw rubber or incomplete vulcanization, stickiness and other disadvantages occur, which affects the advantages of addition molding rubber.
Therefore, this type of addition molding glue with self-adhesiveness, low viscosity, good fluidity and high mechanical strength is particularly outstanding and in short supply.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Preparation of modified silane coupling agent tackifier

[0025] It is synthesized by reacting hydrogen-containing tetracycline and KH-560 (γ-glycidyloxypropyltrimethoxysilane) in a mass ratio of 3:1 at 100-120°C for 2-4 hours.

[0026] (2) Preparation of polyborosilicate tackifier

[0027] Using 180-250 parts by mass of vinyl alkoxysiloxane and 1-35 parts by mass of boric acid in H + catalyst and at 100-130°C generates a After the borosiloxane of the structure, react with the polyhydrogensiloxane of trimethylsiloxy end-capping according to the mass ratio of 120:70 and the above-mentioned product to obtain and tackifier.

[0028] (3) Preparation of adhesive addition type liquid silicone rubber:

[0029] Prepare the base:

[0030] Add 100 parts by mass of dimethylvinylsiloxy-terminated polydimethylsiloxane with a viscosity of 5000cp into a special stainless steel compounding kettle, add 50 parts by mass of a(CH 3 ) 2 (CH 2 =CH)Si) 1 / 2 b(CH 3 ) 3 SiO 1...

Embodiment 2

[0039] (1) Preparation of modified silane coupling agent tackifier

[0040] It is synthesized by reacting a certain ratio of hydrogen-containing tetracycline and KH-560 (γ-glycidyloxypropyltrimethoxysilane) at 100-120°C.

[0041] (2) Preparation of adhesive addition type liquid silicone rubber:

[0042] In 98 parts by mass of polydimethylsiloxane with a viscosity of 400cp as the end group of dimethylvinylsilyloxy group, 6 parts by mass of the structure is (m=3, n=5) hydrogen-containing silicone oil; platinum complex with a platinum content of 8920 ppm, an amount of 10 parts per million by mass; 0.5 mass part of tetramethyltetravinylcyclotetrasiloxane, 95 parts by mass of 3000 mesh silicon powder, 0.9 parts by mass of ZnO, 0.05 parts by mass of aluminum acetylacetonate, 1.5 parts by mass of polyborosiloxane and 0.5 parts by mass of modified silane coupling agent tackifier are fully mixed Then, it is formulated into an addition type self-adhesive liquid silicone rubber for circ...

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PUM

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Abstract

The invention provides an adhesive addition liquid silicone rubber. The adhesive addition liquid silicone rubber can be prepared via glue preparation from a prepared basic glue, an A component and a B component; or can be prepared by adding hydrogen-contained silicone oil, a platinum complex, tetravinyl tetramethylcyelo tetrasiloxane, silica powder of 3000 meshes, ZnO, a complex of aluminium and acetylacetone, polyborosiloxane, modified silane coupling agent, and a tackifier into dimethyl vinyl methylsiloxy-terminated polydimethylsiloxane, and full mixing. The adhesive addition liquid silicone rubber possesses advantages such as autoadhesion, low viscosity, high fluidity and excellent mechanical strength.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to an adhesive addition type liquid silicone rubber. Background technique [0002] In recent years, with the development of my country's organic silicon industry and the promotion of application technology, great progress has been made in the research, development and application of addition-type liquid silicone rubber. The addition-type liquid silicone rubber has many excellent properties, especially its non-toxic, odorless, non-corrosive, chemically inert, simple molding process, small linear shrinkage, deep vulcanization, and the vulcanization speed can be controlled by temperature adjustment, etc. It is widely used in various industries such as electronics, machinery, cultural relics, and handicraft reproduction, showing its many advantages over condensation-type adhesives. [0003] However, its bonding performance is poor. When it is used as a potting, coating, insert, and inj...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08L83/08C08L83/05C08K5/54C08K13/02C08K5/549C08K3/02C08G77/398
Inventor 李贵宾
Owner 深圳市红叶杰科技有限公司
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