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Silicone rubber tackifier, liquid two-component addition type silicone rubber prepared therefrom and application thereof

A silicone rubber, addition molding technology, used in adhesives, polymer adhesive additives, non-polymer adhesive additives, etc. Quantity and other issues to achieve the effect of good storage stability

Active Publication Date: 2020-07-17
XIAMEN JINTAIXIANG NEW TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-component addition type silicone rubber prepared with this tackifier must be strictly dehydrated, and must be kept sealed during storage to prevent the absorption of moisture in the air. In addition, due to the presence of methoxyl and ethoxyl groups, it will Occasionally, small molecule volatiles are released, which may condense on the LED bulb and affect the LED light flux
[0004] In addition, the silicone structure used in this tackifier obtained through condensation reaction is a long linear polyorganosiloxane, which is combined with the base material of two-component rubber such as vinyl-terminated polyorganosiloxane and hydrogen-containing polyorganosiloxane. Organosiloxanes have similar structures and are easily entangled with each other, which limits the ability of the tackifier to migrate to the surface of the substrate during curing, so the bonding ability is limited to a certain extent

Method used

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  • Silicone rubber tackifier, liquid two-component addition type silicone rubber prepared therefrom and application thereof
  • Silicone rubber tackifier, liquid two-component addition type silicone rubber prepared therefrom and application thereof
  • Silicone rubber tackifier, liquid two-component addition type silicone rubber prepared therefrom and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The preparation of embodiment 1 addition type silicone rubber tackifier

[0044] Add 120 parts by mass of tetramethylcyclotetrasiloxane, 38 parts by mass of allyl glycidyl ether, and 0.4 parts by mass of platinum catalyst (platinum content is 3000ppm) into the three-necked flask, heat and stir in a water bath at 50°C for 30 minutes, drop into 76 parts by mass of allyl glycidyl ether (dropped in about 60 minutes), heated and stirred in a water bath at 50°C for 30 minutes, added 0.1 parts by mass of hydroquinone and 226 parts by mass of 1,6-hexanediol diacrylate, and placed in a water bath at 50°C After heating and stirring at medium temperature for 30 minutes, the temperature of the water bath was raised to 80° C., and after stirring for 4.5 hours, 0.1 parts by mass of hydroquinone was added and stirred for 10 minutes. Cool to room temperature, place at room temperature for 12 hours, add 20 parts by mass of activated carbon and stir for 30 minutes, and filter to separate...

Embodiment 2

[0050] Embodiment 2 Preparation of liquid two-component addition type silicone rubber

[0051] 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity (25°C) of 300 mPa·s, 98 parts of calcium carbonate whose surface was treated with a silane coupling agent, and 2 parts of gas-phase white carbon whose surface was treated with a silane coupling agent Black, stir and mix uniformly under vacuum conditions in a planetary machine, add 0.5 part of tackifier prepared in Example 1, 4 parts of hydrogen-containing silicone oil with a hydrogen content of 0.75%, 0.05 part of inhibitor (3,5-dimethyl base-1-ethynyl-3-alcohol), stir and mix evenly in a planetary machine, then add 0.5 parts of a platinum catalyst with a platinum content of 3000ppm, stir and mix evenly, and obtain a double Component addition silicone rubber.

[0052] According to GB / T7124-2008, the prepared two-component addition-type silicone rubber with adhesiveness to metal and non-metal materials was respective...

Embodiment 3

[0053] Embodiment 3 Preparation of liquid two-component addition type silicone rubber

[0054] Stir and mix 100 parts of vinyl-terminated polydimethylsiloxane with a viscosity (25°C) of 300mPa·s and 200 parts of calcium carbonate whose surface has been treated with a silane coupling agent in a planetary machine under vacuum conditions, and add 3 parts The tackifier obtained in Example 1, 8 parts of hydrogen-containing silicone oil with a hydrogen content of 0.36%, 0.1 part of inhibitor (1-hexynyl-1-cyclohexanol), after stirring and mixing uniformly in a planetary machine, Then add 0.05 parts of platinum catalyst with a platinum content of 3000ppm and stir to mix evenly to obtain a two-component addition type silicone rubber with adhesion to both metal and non-metal materials.

[0055] According to GB / T7124-2008, the prepared two-component addition-type silicone rubber, which is adhesive to both metal and non-metal materials, is respectively bonded to aluminum, stainless steel,...

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Abstract

The invention discloses a silicone rubber tackifier, a liquid two-component addition type silicone rubber prepared therefrom and an application thereof. In the present invention, hexanediol diacrylate and allyl glycidyl ether are subjected to hydrosilylation reaction with hydrogen-containing cyclosiloxane under the action of platinum catalyst, and epoxy group and acrylate group are connected to cyclosiloxane Addition-type silicone rubber tackifier is obtained; the prepared addition-type silicone rubber tackifier is added to two-component addition-type silicone rubber, and after vulcanization, it can simultaneously treat various metals (such as aluminum alloys, stainless steel) and non-metallic materials. Metal materials (such as PC, PBT) have good adhesion, and the shear strength at room temperature can reach 1.7MPa, and can achieve 100% cohesive failure when bonding aluminum, stainless steel, glass, PC and PBT; and in There is no volatile matter in the vulcanization process, and the application on the LED lamp will not affect the luminous flux of the LED lamp.

Description

technical field [0001] The present invention relates to a silicone rubber tackifier, especially a two-component addition type silicone rubber tackifier and a liquid two-component addition type silicone rubber prepared therefrom. The present invention further relates to their application in bonding metal and non-metal materials , belongs to the field of silicone rubber tackifier. Background technique [0002] Silicone rubber is a linear polyorganosiloxane-based polymer, adding crosslinking agent, reinforcing filler and other compounding agents, mixed and vulcanized to form an elastomer, which has been used in sealing, bonding, filling, heating, etc. Widely used in industry. For example, the silicone rubber currently used for the bonding of bulbs and lamp caps on LED lamps is mainly a condensation-type one-component silicone rubber packaged with one or two components. Condensed one-component silicone rubber has the characteristics of no glue mixing and more convenient sizing...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J11/08C08G77/20C08G77/14C09J183/07C09J183/05C09J11/04
CPCC08G77/14C08G77/20C08K2003/2227C08K2003/265C08L2203/206C08L2205/02C08L2205/025C08L2205/03C09J11/04C09J11/08C09J183/04C08L83/06C08L83/04C08K13/06C08K9/06C08K3/26C08K3/36C08K3/22
Inventor 张恩天黄智勇张永生王赫铭
Owner XIAMEN JINTAIXIANG NEW TECH
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