Room-temperature vulcanization dual-component deketoxime type silicone rubber sealant and preparation method thereof

A room temperature vulcanization, silicone rubber technology, used in chemical instruments and methods, adhesives, non-polymer adhesive additives, etc., can solve the problems of high metering dependence, fast curing speed of sealants, poor adhesion, etc.

Inactive Publication Date: 2012-06-20
TONSAN ADHESIVES INC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to solve the shortcomings of single-component deep curing slow and two-component large dependence on metering and poor bonding, and provide a new type of two-component deketoxime type silicone rubber sealant, which can be used Moisture absorption curing alone; the curing speed of the sealant after mixing components A and B is fast; when the ratio of components A and B changes in a wide range, the sealant can still maintain good performance; the adhesive ability can be used even after high temperature It can still be maintained after high humidity aging and has good bond durability

Method used

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  • Room-temperature vulcanization dual-component deketoxime type silicone rubber sealant and preparation method thereof

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Embodiment

[0034] Component A: Select α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mpa.s, and dimethicone oil with a viscosity of 500mpa.s. The components are as follows:

[0035] A 1.α,ω-Dihydroxypolydimethylsiloxane 100 parts

[0036] A 2 . 20 parts of simethicone oil

[0037] A 3 . Methyl tributanoximino silane 8 parts

[0038] A 4 . (CH 3 O) 3 Si(CH 2 ) 3 OCO(CH 2 ) 2 N(CH 2 ) 3 CH 3 Si(CH 3 O) 3 1.5 servings

[0039] A 5 . 50 parts of calcium carbonate, 15 parts of fumed silica

[0040] A 6 . 0.5 parts of dibutyltin dilaurate

[0041] Add the hydroxyl-terminated polydimethylsiloxane, simethicone oil and fillers with the above-mentioned viscosity and parts into the stirring tank, and stir for 2-4 hours at 110°C~130°C and -0.09~-0.1MPa vacuum condition. Hours later, the temperature was lowered to below 40°C, and the above-mentioned parts of methyl tributylketoxime silane, silane coupling agent, and dibutyltin dilaurate were added in sequence and...

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Abstract

The invention relates to a room-temperature vulcanization dual-component deketoxime type silicone rubber sealant and a preparation method thereof. In the sealant, a component A is used for absorbing moisture and curing, a component B can be used for accelerating curing, and the component A and the component B are uniformly mixed according to a certain proportion for quickly curing when the sealant is used. The initial strength of the sealant is increased quickly, so that the production rhythm can be remarkably improved; and the requirement on the proportional accuracy of the component A and the component B is greatly reduced compared with a conventional dual-component silicone rubber sealant. Furthermore, a coupling agent with a special structure is adopted in the prescription, so that the sealant has excellent plastic bonding capability and high-temperature high-humidity resistance, and can be widely applied to bonding and sealing in electronics, automobiles, home appliances and other industries.

Description

technical field [0001] The invention relates to a silicone sealant, in particular to a room temperature vulcanized two-component deketoxime type silicone rubber sealant and a preparation method thereof. [0002] Background technique [0003] Silicone sealants are widely used in electronics, automobiles, home appliances, construction and other industries due to their advantages such as wide temperature resistance, good weather resistance and excellent insulation performance. With the advantages of wide range and excellent mechanical properties, it has become one of the most widely used varieties of silicone sealants. However, the usual deketoxime type silica gel is packaged in one component. This type of silica gel is more convenient to use. It can be cured by absorbing moisture in the air, but its disadvantage is that it relies on absorbing water vapor in the air to cure, and the water vapor can only penetrate slowly from the surface to the inside, so its deep curing speed ...

Claims

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Application Information

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IPC IPC(8): C08L83/06C08L83/04C09K3/10C08K13/02C08K5/5465C08K5/544C09J183/06C09J183/04C09J11/06C09J11/04
Inventor 王德波李印柏翟海潮王兵林新松
Owner TONSAN ADHESIVES INC
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