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Single-component crystal flowing-type dealcoholized room temperature vulcanized silicone rubber and preparation method thereof

A room temperature vulcanization, flow-type technology, applied in the field of silicone rubber products, can solve the problems of poor adhesion, silicone rubber degradation, water resistance, etc., and achieve the effects of good adhesion, fast curing and high storage period

Inactive Publication Date: 2012-07-25
FOSHAN PULIDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alcohol-type transparent flowable silicone rubber seen in the market can only be used indoors, not outdoors, and it is easy to yellow and has poor bonding performance.
There are many reports and literatures about transparent flow dealcoholized one-component room temperature vulcanized silicone rubber, but there is no report on the solution of high transparency, long shelf life, high water resistance, flow dealcoholized room temperature vulcanized silicone rubber
The commercialized transparent flow dealcoholized one-component room temperature vulcanized silicone rubber on the market is Nanda-705 product. Although the transparency is good, the product contains high chlorine content, and the product cannot meet the EU ROHOS requirements; if it does not contain chlorine, the product will be cured. It is easy to whiten and has poor light transmission; moreover, the product is easy to turn yellow during storage or after vulcanization, and is not resistant to water. Silicone rubber will degrade after long-term soaking in water, and the adhesive performance is not good enough
Therefore, its scope of application is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0034] The preparation method of the present invention prepares the above-mentioned one-component crystal flow type dealcoholized room temperature vulcanized silicone rubber, which comprises the following method steps:

[0035] (1) According to the weight ratio, put 100 parts by weight and 0-100 parts of plasticizer into the rubber making machine, stir and defoam under vacuum for 20 minutes;

[0036] (2) stop stirring, N 2 Balance the vacuum, add 2-20 parts of crosslinking agent to the mixture in step (1), and stir and react under vacuum for 20-50 minutes;

[0037] (3) stop stirring, N 2 Balance the vacuum, add 0.1-10 parts of coupling agent and 0.01-10 parts of curing accelerator to the mixture in step (2), and stir and react under vacuum for 30-60 minutes;

[0038] (4) stop stirring, N 2 Balance the vacuum, add 0.01-5 parts of catalyst to the mixture in step (3), and stir the reaction under vacuum for 20-50 minutes;

[0039] (5) stop stirring, N 2 The vacuum is balanced...

example 1

[0042]Put 1,000 grams of 50,000mPa·s (25°C) hydroxyl-terminated polydimethylsiloxane and 200 grams of 300mPa·s (25°C) methyl silicone oil into the rubber machine, and stir in vacuum for 20 minutes; stop stirring , N 2 Balance the vacuum, add 20 grams of methyltriethoxysilane, 40 grams of ethyl silicate, and stir in vacuum for 30 minutes; stop stirring, N 2 Balance the vacuum, add 30 grams of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 15 grams of YAA accelerator, and stir in vacuum for 30 minutes; stop stirring, N 2 Equilibrate the vacuum, add 3 grams of YTA catalyst and 7 grams of YXA catalyst, and stir in vacuum for 30 minutes. Stirring stopped, N 2 The vacuum is balanced, the material is divided into packages and sealed, and the finished product of silicone rubber is obtained.

example 2

[0044] Put 1,000 grams of 50,000mPa·s (25°C) hydroxyl-terminated polydimethylsiloxane and 100 grams of white mineral oil into the rubber making machine, and stir in vacuum for 20 minutes; stop stirring, N 2 Balance the vacuum, add 20 grams of methyltrimethoxysilane, 40 grams of propyl silicate, and stir in vacuum for 30 minutes; stop stirring, N 2 Balance the vacuum, add 25 grams of γ-mercaptopropyltrimethoxysilane, 20 grams of YAA accelerator, and stir in vacuum for 30 minutes; stop stirring, N 2 Balance the vacuum, add 1 g of YTA catalyst, 10 g of YXA catalyst, and stir in vacuum for 30 minutes. Stirring stopped, N 2 The vacuum is balanced, the material is divided into packages and sealed, and the finished product of silicone rubber is obtained.

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Abstract

The invention relates to single-component crystal flowing-type dealcoholized room temperature vulcanized silicone rubber and a preparation method of the dealcoholizing room temperature vulcanized silicone rubber. The dealcoholized room temperature vulcanized silicone rubber is characterized in that the crystal silicone rubber comprises the components in parts by weight as follows: 100 parts of base rubber are taken as a unit, and the other needed components are 0-100 parts of a plasticizer, 2-20 parts of a cross-linking agent, 0.1-10 parts of a coupling agent, 0.01-10 parts of a solidifying accelerator and 0.01-5 parts of a catalyst; and the silicone rubber product is produced by a certain process method. The single-component crystal flowing-type dealcoholized room temperature vulcanized silicone rubber provided by the invention is good in adhesion, has no corrosion to the metal such as copper materials and the like, is capable of rapid solidification and keeping high-transparency and high-light transmission before and after solidification, can be yellowing resistant for a long period before and after solidification, and boiling resistant after solidification, and is long in storage period.

Description

technical field [0001] The invention relates to a silicone rubber product and a production and preparation method of the silicone rubber. Background technique [0002] With the rapid development of the electronic and electrical industry, dealcoholized one-component room temperature vulcanized silicone rubber has the advantages of environmental protection, non-corrosion, non-irritation, strong adaptability and low cost, and is widely used in industries. However, the alcohol-type transparent flowable silicone rubber seen in the market can only be used indoors and cannot be used outdoors, and it is easy to yellow and has poor bonding performance. There are many reports and literatures about transparent flow dealcoholized one-component room temperature vulcanized silicone rubber, but there is no report about the solution of high transparency, long shelf life, high water resistance, flow dealcoholized room temperature vulcanized silicone rubber. The commercialized transparent fl...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/07C08L83/04C08K5/5419C08K5/544C08K5/548C08K5/5435
Inventor 王国泉俞文彬
Owner FOSHAN PULIDA TECH
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