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Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof

A silicone rubber and sealant technology, applied in adhesives, chemical instruments and methods, non-polymer adhesive additives, etc., can solve the problems of measurement error sensitivity, mixing error, etc., achieve reduced sensitivity and good storage stability Effect

Active Publication Date: 2013-04-24
TONSAN ADHESIVES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a novel two-component system, which allows mixing errors and metering errors during use, and solves the problem of the sensitivity of two-components to mixing errors and metering errors. The ratio between parts B can be varied over a wide range without adversely affecting the final strength

Method used

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preparation example Construction

[0051] The invention relates to a novel two-component dealcoholized silicone rubber sealant and a preparation method thereof, which is characterized in that the silicone rubber sealant comprises the following two components A and B, and the volume mixing ratio of A and B is 20: 1 to 2:1.

[0052] 1) Component A, including the following components, each component is as follows in parts by weight:

[0053] A 1 .α,ω-Dihydroxypolydimethylsiloxane 100 parts

[0054] A 2 . Simethicone oil 10-30 parts

[0055] A 3 . Dealcohol-type cross-linking agent 3-8 parts

[0056] A 4 . Silane coupling agent 1-5 parts

[0057] A 5 . Reinforcing filler 10-100 parts

[0058] A 6 . Catalyst 0.1-0.6 parts

[0059] said A 1 The component is α, ω-dihydroxy polydimethylsiloxane, and its molecular structure is HO[(CH3) 2 SiO] n H， n=300~1500, the viscosity at 25°C is 1000-50000mpa.s, preferably α,ω-dihydroxypolydimethylsiloxane with a viscosity of 20000mpa.s.

[0060] said A 2 The...

Embodiment

[0077] Take 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mpa.s at 25°C and 20 parts of dimethyl silicone oil with a viscosity of 500mpa.s under the condition of vacuum degree of -0.095~-0.1MPa Mix well to remove air bubbles. Add 4 parts of vinyltrimethoxysilane under the protection of nitrogen, then stir for 20 minutes under the condition of vacuum degree of -0.095 ~ -0.1MPa to carry out the capping reaction, and then add 4 parts of ethyl orthosilicate for partial hydrolysis under the protection of nitrogen. Stir for 20min under the condition of vacuum degree -0.095~-0.1MPa. A mixture of 2 parts of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and 2 parts of γ-(2,3-glycidyloxy)propyltrimethoxysilane was added under nitrogen protection, Stir for 20min under the condition of vacuum degree -0.095~-0.1MPa. Add 5 parts of fumed white carbon black and 50 parts of light calcium carbonate successively under the condition of nitrogen protection, and stir...

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Abstract

Novel bi-component dealcoholization type silicon rubber sealant and preparation method thereof, wherein component A itself is single-component dealcoholization type silicon rubber and can offer a final strength value equal to the mixture of component A and component B, and has a good storage stability. The component B contains water, wherein the water can be directly added in free-state way and carried on the filler material; the component B also contains reactive polymer which can be activated by contacting with the catalyst of the component A, and perform quick cross-linking reaction with the cross-linking agent in the component A at the same time, the advantages of the invention are as follows: on one hand, the invention solves the shortcoming that the single-component silicon rubber has bigger reliance on the temperature and humidity of the environment; on the other hand, the invention accelerates the curing and reduces sensibility of the bi-component system to the mix error and measurement error at the same time. The ratios of the component A and component B in the bi-component system can vary in a large range without producing adverse effect to the final strength.

Description

technical field [0001] The invention relates to a novel two-component dealcoholized silicone rubber sealant and a preparation method thereof. Component A of the two-component dealcoholized silicone rubber can completely absorb moisture and cure, and at the same time, the introduction of component B can also Accelerates curing. On the one hand, this new type of two-component silicone rubber solves the disadvantage of the single-component silicone rubber’s large dependence on ambient temperature and humidity. On the other hand, it accelerates curing and reduces the sensitivity of the two-component system to mixing errors and metering errors. sex. This two-component silicone rubber can be widely used in the bonding and potting of various electronic and electrical components, and can protect against moisture, corrosion, and insulation, and is especially suitable for potting and bonding of components that require rapid and deep vulcanization. . Background technique [0002] Ro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/06C08L83/04C09K3/10C08K13/06C08K9/06C08K9/04C08K3/36C08K3/26C09J183/06C09J183/04C09J11/04C09J11/06
Inventor 刘贵培李印柏林新松翟海潮王兵
Owner TONSAN ADHESIVES INC
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