High-temperature resistant and expediting setting dealcoholized type room temperature vulcanized silicone rubber adhesive and preparation method thereof

A rapid curing and room temperature vulcanization technology, applied in the direction of adhesives, etc., can solve the problems of heat resistance to be improved, and achieve the effects of fast curing speed, excellent bonding performance and excellent mechanical properties

Inactive Publication Date: 2009-11-04
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the curing speed of most RTV-1 is not very fast, and the heat resistance needs to be improved.

Method used

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  • High-temperature resistant and expediting setting dealcoholized type room temperature vulcanized silicone rubber adhesive and preparation method thereof
  • High-temperature resistant and expediting setting dealcoholized type room temperature vulcanized silicone rubber adhesive and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] High temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, made by the following method:

[0037] (1) 100g of hydroxyl-terminated polydimethylsiloxane (107 glue) with a viscosity of 9100Pa.s, 3g of fumed silica (with a particle size of 10-500nm and a BET specific surface area of ​​160±25m 2 / g), titanium dioxide 5g (particle size is 15 ~ 500nm, BET specific surface area is 50 ± 15m 2 / g), fully mixed, and the obtained mixture was put into a vacuum oven for drying and defoaming for 2h;

[0038] (2) In a dry environment, to the product obtained in step (1), add 0.1 g of hexamethylcyclotrisilazane, 1 g of trithiocyanuric acid, 0.1 g of dioctyltin dilaurate, 4-amino-3 , 3 dimethylbutyltrimethoxysilane 1g, vacuum stirring at room temperature for 0.5h, that is, a high temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, poured into a metal hose and sealed for storage.

[0039]...

Embodiment 2

[0041] High temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, made by the following method:

[0042] (1) 100g of 107 glue with a viscosity of 9100Pa.s, 10g of fumed silica (with a particle size of 10-500nm and a BET specific surface area of ​​160±25m 2 / g), titanium dioxide 2g (particle size is 15 ~ 500nm, BET specific surface area is 50 ± 15m 2 / g), fully mixed, and the obtained mixture was put into a vacuum oven for drying and defoaming for 1h;

[0043] (2) In a dry environment, to the product obtained in step (1), add 3 g of hexamethylcyclotrisilazane, 2 g of thiocyanuric acid, 0.5 g of dioctyltin dilaurate, and 4-amino-3, 3 Dimethylbutyltrimethoxysilane 4g, vacuum stirring at room temperature for 0.5h, that is, a high temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, poured into a metal hose and sealed for storage.

[0044] Tested according to the method and conditio...

Embodiment 3

[0046] High temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, made by the following method:

[0047](1) 100g of 107 glue with a viscosity of 9100Pa.s, 10g of fumed silica (with a particle size of 10-500nm and a BET specific surface area of ​​160±25m 2 / g), titanium dioxide 8g (particle size is 15 ~ 500nm, BET specific surface area is 50 ± 15m 2 / g), fully mixed, and the obtained mixture was put into a vacuum oven for drying and defoaming for 6h;

[0048] (2) In a dry environment, to the product obtained in step (1), add 5 g of hexamethyldisilazane, 5 g of vinyl triperoxy tert-butyl silane, 1 g of dibutyltin dilaurate, and 1 g of anilinomethyl tris Ethoxysilazane 7g, vacuum stirring at room temperature for 1 hour, that is, a high temperature resistant rapid curing dealcoholized room temperature vulcanized silicone rubber adhesive, poured into a metal hose and sealed for storage.

[0049] Tested according to the method and c...

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Abstract

The invention discloses a high-temperature resistant and expediting setting dealcoholized type room temperature vulcanized silicone rubber adhesive and a preparation method thereof. The adhesive is prepared from the following components by weight: 100 parts of hydroxyl-terminated polydimethylsiloxane with the viscosity ranging from 4000 to 12000 Pa.s, 3 to 20 parts of fumed silica, 0.1 to 6 parts of viscosity increasers, 1 to 7 parts of cross-linking agents, 0.1 to 1 part of catalysts, 2 to 8 parts of titanium dioxide and 0.1 to 5 parts of hydroxy finishing agent, and is prepared by the following methods: (1) the hydroxyl-terminated polydimethylsiloxane, the fumed silica and the titanium dioxide are uniformly mixed to obtain a mixture, and the mixture is led into a vacuum drying chamber and then is dried and defoamed; and (2) under the dry environment, the hydroxy finishing agent, the viscosity increaser, the catalyst and the cross-linking agent are added to the mixture and stirred with under vacuum at room temperature, thereby preparing the adhesive. The adhesive of the invention has the advantages of high and adjustable setting speed, excellent mechanical property, favorable resistance to high temperature and strong bonding force.

Description

technical field [0001] The invention relates to a vulcanized silicone rubber adhesive and a preparation method. Background technique [0002] One-component room temperature vulcanizing silicone rubber (hereinafter referred to as RTV-1) is based on hydroxyl-terminated polydimethylsiloxane (PDMS), and trifunctional silane is used as a crosslinking agent, supplemented by fillers, plasticizers and catalysts A mixture of equal components. It keeps a fluid or plastic state under absolutely dry and airtight conditions. When exposed to air, it reacts with moisture in the air, cross-links, solidifies, forms and condenses out low molecules. [0003] RTV-1 has the advantages of wide working temperature range (50℃~300℃), excellent aging resistance, water resistance, good electrical insulation, good bonding performance, and convenient use. It has been widely used in the fields of construction, machinery manufacturing, chemical industry and electronics, and has become an indispensable n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J9/00
Inventor 郑俊萍吴连锋何志辉董志磊
Owner TIANJIN UNIV
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