High-curing-speed, high-storage-stability and humidity/heat-resistant de-oximed room temperature vulcanized silicone rubber for new energy and preparation method thereof

A technology of room temperature vulcanization and heat and humidity resistance, which is applied in the field of silicone rubber to achieve the effects of fast curing, reduced sensitivity and stable storage

Inactive Publication Date: 2013-04-03
SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, in the deoxime system, one-component silica gel that requires fast curin

Method used

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  • High-curing-speed, high-storage-stability and humidity/heat-resistant de-oximed room temperature vulcanized silicone rubber for new energy and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] In parts by weight, 1000g molecular weight is 20,000 α, ω-dihydroxy polydimethylsiloxane, 600g nanometer calcium carbonate, 400g aluminum hydroxide, 200g molecular weight is 1000 dimethylsiloxane, in It was used as base material after vacuum stirring and dehydration for 2 hours at 120°C. Take 1000g of the base material, add 30g of vinyl tributylketoxime silane, 20g of phenyl tributylketoxime silane, 50g of white carbon black, stir well, add 1g of dibutyltin dilaurate, 10g of N-(β-ammonia Ethyl)-γ-aminopropyltrimethoxysilane, 20g C 6 h 5 NHCH 2 CH 2 CH 2 Si(OCH 3 ) 3 Tertiary aminosiloxane. The curing speed, moisture and heat resistance and storage stability of the sealant are shown in Table 1.

Embodiment 2

[0043] The base was prepared as shown in Example 1 in parts by weight. Take 1000g of the base material, add 20g of methyl tributylketoxime silane, 30g of phenyl tributylketoxime silane, 50g of white carbon black, stir evenly, add 1g of dibutyltin dilaurate, 10g of N-(β-ammonia Ethyl)-γ-aminopropyltrimethoxysilane, 20g C 6 h 5 NHCH 2 CH 2 CH 2 Si(OCH 3 ) 3 Tertiary aminosiloxane. The curing speed, moisture and heat resistance and storage stability of the sealant are shown in Table 1.

Embodiment 3

[0045] The base was prepared as shown in Example 1 in parts by weight. Take 1000g of the base material, add 25g of methyl tributylketoxime silane, 25g of phenyl tributylketoxime silane, 50g of white carbon black, stir evenly, add 1g of dibutyltin dilaurate, 10g of N-(β-ammonia Ethyl)-γ-aminopropyltrimethoxysilane, 20g C 6 h 5 NHCH 2 CH 2 CH 2 Si(OCH 3 ) 3 Tertiary aminosiloxane. The curing speed, moisture and heat resistance and storage stability of the sealant are shown in Table 1.

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Abstract

The invention relates to high-curing-speed, high-storage-stability and humidity/heat-resistant de-oximed room temperature vulcanized silicone rubber which is characterized by comprising the following components in parts by weight: 100 parts of alpha,omega-dihydroxy polydimethylsiloxane, 1-20 parts of de-oximed mixed crosslinking agent, 1-10 parts of organotin catalyst, 0-250 parts of filler, 0-100 parts of low-molecular-weight silicone oil, 0-10 parts of mixed tackifier and 1-10 parts of tertiary aminosiloxane. The invention also provides a preparation method of the high-curing-speed, high-storage-stability and humidity/heat-resistant de-oximed silicone rubber, which is characterized in that the mixed crosslinking agent, organotin catalyst, mixed tackifier and tertiary aminosiloxane are selected, so that the silicone rubber has high curing speed and favorable storage performance, wherein the surface drying time is 1-5 minutes, and the storage period exceeds one year. Meanwhile, the humidity/heat aging resistance is very fine, wherein after double-85 aging for 1000 hours, the mechanical property can be kept at 75% or above.

Description

technical field [0001] The invention relates to a deoxime type room temperature vulcanized silicone rubber for new energy with fast curing, stable storage, and heat and humidity resistance and a preparation method thereof, belonging to the technical field of silicone rubber. Background technique [0002] Silicone rubber has excellent comprehensive properties in high and low temperature resistance, weather resistance, moisture resistance, electrical insulation, UV aging resistance, chemical inertness, etc., and has been widely used in aviation, electronics, automobiles, machinery, instruments, medical and health and daily life. Room temperature vulcanized silicone rubber (RTV) is favored by industry applications and researchers due to its extremely convenient production and use, and is developing rapidly. [0003] However, with the rapid development of the market and the continuous advancement of technology, the requirements for room temperature vulcanized silicone rubber are...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/04C08L83/05C08L83/12C08K13/02C08K5/544C08K5/5465C08K3/26C08K3/22C08K3/36
Inventor 何秀冲王熹廖江涛章锋
Owner SHANGHAI HUITIAN NEW CHEMICAL MATERIALS CO LTD
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