High-adhesive one-component deoximation type room-temperature vulcanized silicone rubber sealant and preparation method thereof

A room temperature vulcanization, high-adhesion technology, applied in chemical instruments and methods, non-polymer adhesive additives, adhesives, etc. Adhesion and other problems, to meet the production cycle requirements, delay the surface curing speed, increase the effect of the bonding range

Active Publication Date: 2014-07-23
富乐(苏州)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the introduction of aminosilane coupling agent tends to greatly increase the curing speed of the adhesive surface layer, which is not conducive to the migration and diffusion of the coupling agent to the surface of the bonding substrate, so that the bonding range is limited.
[0003] The invention application with application publication number CN 103571427 A discloses a single-component deoximated silicone sealant for solar cell module sealing and its preparation method , which aims to provide a one-component room temperature vulcanization with excellent weather resistance, anti-yellowing performance, flame retardancy, low water vapor transmission rate and good storage stability, but it cannot solve the problem of difficult-to-stick substrates
[0004]Application publication number CN 103305181 A discloses a single-component deoxime type sealant for solar modules, which mainly solves environmental protection and weather resistance It also cannot solve the problem of adhesion, especially the problem of difficult-to-bond substrates

Method used

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  • High-adhesive one-component deoximation type room-temperature vulcanized silicone rubber sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Preparation of modified α, ω-dihydroxy polydimethylsiloxane

[0029] The method as described in CN 103044920A: 100 parts of 20000 mPa.s viscosity of α, ω-dihydroxypolydimethylsiloxane, 2 parts of vinyltrimethoxysilane are added to the planetary stirring tank, and the 2 In the atmosphere, add the reactant of dibutylamine and acetic acid as a catalyst for the capping reaction, stir the reaction at a certain temperature for 10-60min, and then remove the low boilers at 100°C and vacuum >-0.09MPa to obtain a modified α,ω-Dihydroxypolydimethylsiloxane.

Embodiment 2

[0031] According to implementation 1, 100 parts of modified α, ω-dihydroxy polydimethylsiloxane, 15 parts of dimethyl silicone oil with a viscosity of 500mpa.s, 80 parts of calcium carbonate, and 10 parts of fumed white carbon black were added to the kneading In the machine, start stirring and dispersing, dehydrate at 130°C~140°C, -0.09~-0.1MPa vacuum for 2~4 hours, then cool down to below 40°C. The above slurry is transferred to the planetary stirring tank, under N 2 Under protection, add 10 parts of vinyl tributylketoxime silane, 2 parts of γ-aminopropyltrimethylsilane, and 0.3 part of dibutyltin dilaurate, and stir under vacuum condition of -0.09~-0.1MPa until uniform and free of bubbles.

[0032] Example 2:

[0033] 100 parts of modified α, ω-dihydroxy polydimethylsiloxane prepared according to implementation 1, 15 parts of simethicone oil with a viscosity of 1000pa.s, 100 parts of calcium carbonate, and 8 parts of white carbon black were added to the kneader In the pr...

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Abstract

The invention discloses a high-adhesive one-component deoximation type room-temperature vulcanized silicone rubber sealant comprising the following components from (A) to (F) in parts by weight: 100 parts of modified alpha, omega-dihydroxylpolydimethylsiloxane (A), 10-30 parts of dimethyl silicon oil (B), 7-12 parts of deketoxime crosslinking agent (C), 1-5 parts of silane coupling agent (D), 50-150 parts of reinforcing filler (E) and 0.1-1 part of catalyst (F). Compared with the traditional deoximation type sealant, the sealant has excellent adhesive property particularly for some substrates such as plastics, modified resin and the like which are difficultly adhered by using an organic silicon adhesive and can be widely applied to adhesion and sealing of industries such as electronics, automobiles, household appliances and the like. Modified polydimethylsiloxane is used as a basic polymer in deoximation type silicon rubber, so that the sealant has relatively proper surface drying time, provides more reasonable operation time and meets the production takt requirement under different working conditions; in addition, due to the adoption of the modified polydimethylsiloxane, the sealant has excellent waterproofness and is relatively high in strength retention rate under high temperature and high humidity conditions.

Description

technical field [0001] The invention relates to one-component deoxime type room temperature vulcanized silicone rubber, especially a kind of modified polydimethylsiloxane as the base polymer with excellent adhesive performance, adding dimethyl silicone oil, deketoxime type crosslinking agent, filler, coupling agent and catalyst, one-component deoxime type room temperature vulcanized silicone rubber sealant made by absorbing moisture vulcanization and its preparation method. Background technique [0002] The one-component deketoxime type silicone sealant has the advantages of moderate vulcanization speed, less corrosion to metal, stable storage, etc., and occupies a large share in the market. When deoxime one-component RTV silicone rubber is used as an adhesive and sealant, it is often necessary to add a coupling agent to improve its bonding performance with the substrate. At present, the commonly used coupling agents for deoxime type one-component silicone rubber include am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J183/07C09J183/04C09J11/06C09K3/10
CPCC09J183/04C08G77/16C08L83/04C09K3/1018C08L83/00
Inventor 王瑶肖明苏丹
Owner 富乐(苏州)新材料有限公司
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