Bicomponent addition type room curing silicon rubber and preparation method thereof

A room temperature curing, two-component technology, applied in the field of two-component addition type room temperature curing silicone rubber and its preparation, can solve the problems of lower production efficiency, environmental pollution, poor adhesion of addition type liquid silicone rubber, etc., and achieve good flow performance, high thermal conductivity

Inactive Publication Date: 2010-08-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the adhesion of addition-type liquid silicone rubber is poor. When used as potting, coating, and insert injection molding materials, in order to improve the adhesion to the contact substrate, it is usually necessary to pre-coat the substrate. Treat or Add Tac...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Add 32.9 parts of allyl silicone oil, 30 parts of 400-mesh quartz powder, 35 parts of 800-mesh alumina in the stirred tank, stir and heat up to 100°C for half an hour; add 1.5 parts of pink and 0.6 parts of platinum catalyst after cooling down, and stir for 10 Discharge in minutes to obtain component A;

[0024] Add 33.9 parts of allyl silicone oil, 30 parts of 400-mesh quartz powder, 30 parts of 800-mesh alumina powder into the stirred tank, stir and raise the temperature to 100°C for half an hour, after cooling down, add 0.7 parts of vinyl ring, 1.8 parts of hydrogen-containing silicone oil, 3.2 parts of tackifier, 0.4 parts of anti-sedimentation agent, stirred for 10 minutes and discharged to obtain component B;

[0025] Mix the above A and B evenly according to the weight ratio of 1:1 to obtain the above-mentioned novel two-component addition room temperature curing silicone rubber.

Embodiment 2

[0027] Add 43 parts of allyl silicone oil, 30 parts of 600-mesh quartz powder, 25.1 parts of 800-mesh alumina into the stirred tank, stir and heat up to 100°C for half an hour; add 1.1 parts of iron black and 0.8 parts of platinum catalyst after cooling down, and stir After 10 minutes of discharge, component A is obtained;

[0028] Add 43 parts of allyl silicone oil, 25 parts of 600-mesh quartz powder, and 25 parts of 800-mesh alumina powder into the stirred tank, stir and heat up to 100°C for half an hour. After cooling down, add 0.5 parts of acetylene alcohol, 2.5 parts of hydrogen-containing Silicone oil, 3.5 parts of viscosifier, 0.5 parts of anti-sedimentation agent, stirred for 10 minutes and discharged to obtain component B;

[0029] Mix the above A and B evenly according to the weight ratio of 1:1 to obtain the above-mentioned novel two-component addition room temperature curing silicone rubber.

Embodiment 3

[0031] Add 54 parts of allyl silicone oil, 20 parts of 800-mesh quartz powder, and 23 parts of 800-mesh alumina into the stirred tank, stir and heat up to 100°C for half an hour; add 2 parts of carbon black and 1 part of platinum catalyst after cooling down, and stir After 10 minutes of discharge, component A is obtained;

[0032] Add 54 parts of allyl silicone oil, 20 parts of 800-mesh quartz powder, and 18 parts of 800-mesh alumina powder into the stirred tank, stir and raise the temperature to 100°C for half an hour. After cooling down, add 1 part of vinyl ring, 3 parts of hydrogen-containing silicone oil, 3.2 parts of tackifier, 0.8 parts of anti-sedimentation agent, stirred for 10 minutes and discharged to obtain component B;

[0033] Mix the above A and B evenly according to the weight ratio of 1:1 to obtain the above-mentioned novel two-component addition room temperature curing silicone rubber.

[0034] The technical parameters of the prepared silicone rubber are as f...

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PUM

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Abstract

The invention discloses a bicomponent addition type room curing silicon rubber and a preparation method thereof. A component A of the room curing silicon rubber comprises the following components in part by weight: 30 to 60 parts of allyl-terminated organic polysiloxane of which the viscosity is 450 to 1,000 mPa.s, 15 to 30 parts of 400-1,000-mesh quartz powder, 23 to 35 parts of 600-1,200-mesh aluminum oxide, 0.1 to 5 parts of coloring agent, and 0.5 to 3 parts of platinum catalyst; a component B comprises the following components in part by weight: 30 to 55 parts of the allyl-terminated organic polysiloxane of which the viscosity is 450 to 1,000 mPa.s, 20 to 30 parts of the 400-1,000-mesh quartz powder, 18 to 30 parts of the 600-1,200-mesh aluminum oxide, 0.1 to 5 parts of inhibiting agent, 0.5 to 3 parts of hydrogen-containing silicone oil containing 0.17 to 1.2 parts of hydrogen, 0.5 to 6 parts of viscosity increaser, 0.3 to 1 part of anti-settling agent and the like. The prepared bicomponent addition type room curing silicon rubber has high heat conductivity and fluidity and can achieve cohesive failure by being bonded with metals such as aluminum, copper, stainless steel and the like and plastics such as PBT, ABS, PC, epoxy resin and the like, the bonding strength can be over 0.5 MPa, and the properties such as viscosity, hardness, density, strength, linear shrinkage and the like of a liquid silicon rubber are basically not influenced.

Description

technical field [0001] The invention belongs to the field of organosilicon room temperature curing silicone rubber, in particular to a two-component addition type room temperature curing silicone rubber and a preparation method thereof. Background technique [0002] In recent years, with the development of my country's organic silicon industry and the promotion of application technology, the research and development, production and application of addition-type liquid silicone rubber have also made great progress. [0003] Addition-type liquid silicone rubber (LSR) is a relatively high-grade silicone rubber developed in the late 1970s. Compared with condensation-type liquid silicone rubber, it has the advantages of no by-products during the vulcanization process, minimal shrinkage, and deep vulcanization. , The sealing performance at high temperature is also better than that of the condensation type. In addition, LSR also has the outstanding advantages of simple process and ...

Claims

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Application Information

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IPC IPC(8): C08L83/07C08K13/06C08K9/00C08K3/34C08K3/22
Inventor 任天斌蒋志恒钟震黄超韩宇朱金鑫
Owner TONGJI UNIV
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