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High-performance dealcoholized organosilicon adhesive and preparation technique thereof

An organic silica gel, dealcoholized technology, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of prolonged surface viscosity loss, product performance decline, rubber thickening, etc. The effect of production safety factor, improved storage stability and reduced viscosity loss time

Inactive Publication Date: 2015-12-23
FOSHAN SILTOP NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] This traditional technology has the following disadvantages: 1. The surface loses tack for a long time, and the deep curing speed is slow; 2. When it is actually applied to the bonding and sealing of some industries, the adhesion and adhesion to the contacted substrates are not ideal; 3. 1. The activity of terminal hydroxyl groups in the base rubber is too high. When an organic titanate catalyst is added during the production process, a viscosity peak will occur, resulting in a sharp thickening of the rubber material, which will cause problems such as high energy consumption and high resistance, which will affect subsequent production; 4. The existence of hydroxyl groups at the end of the basic rubber also leads to poor storage stability of the produced products, which is manifested in the decline in product performance with the prolongation of storage time. Generally, after three months, the surface viscosity loss time is prolonged, and the mechanical properties after vulcanization are significantly reduced.

Method used

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  • High-performance dealcoholized organosilicon adhesive and preparation technique thereof
  • High-performance dealcoholized organosilicon adhesive and preparation technique thereof
  • High-performance dealcoholized organosilicon adhesive and preparation technique thereof

Examples

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Embodiment 1

[0028] The high-performance dealcoholized organic silica gel of the present embodiment includes the following parts by weight: 100 parts of alkoxy-terminated polydimethylsiloxane, 20 parts of simethicone, 130 parts of activated nano-calcium carbonate, 2 parts Crosslinking agent methyltrimethoxysilane, 2 parts of catalyst diisopropoxybis(ethyl acetoacetate) titanium complex, 0.5 part of complex coupling agent;

[0029] The preparation steps are: (1) Under nitrogen protection conditions, add α, ω-dihydroxypolydimethylsiloxane, tetramethoxysilane, Diethyl ketone oxime, stirred and reacted at 90°C for 3 hours, then heated up to 130°C for 1 hour under reduced pressure to obtain alkoxy-terminated polydimethylsiloxane;

[0030] (2) Under the condition of nitrogen protection, add 3-aminopropyltriethoxysilane and 3-(2,3-epoxypropoxy)propyltrimethoxysilane to the reaction kettle at a ratio of 1:1, Stir the reaction at 90°C for 3 hours, then cool to room temperature to obtain a complex ...

Embodiment 2

[0033] The high-performance dealcoholized organic silica gel of the present embodiment includes the following parts by weight: 100 parts of alkoxy-terminated polydimethylsiloxane, 20 parts of simethicone, 90 parts of activated nano-calcium carbonate, 40 parts Heavy calcium carbonate, 3 parts of crosslinking agent vinyltrimethoxysilane, 1.5 parts of catalyst 1,3-propanedioxytitanium bis(acetylacetone) complex, 1 part of complex coupling agent;

[0034] The preparation steps are: (1) Under the condition of nitrogen protection, add 20000cps of α, ω-dihydroxy polydimethylsiloxane and tetramethoxysilane into the reaction kettle at a ratio of 100:2:5:1 , methyltrimethoxysilane, and acetone oxime, stirred and reacted at 90°C for 3 hours, then heated up to 130°C for 1 hour under reduced pressure to obtain alkoxy-terminated polydimethylsiloxane;

[0035] (2) Under the condition of nitrogen protection, add N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane and 2-(3,4-epoxy ring Hexyl) ethy...

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Abstract

The invention provides a high-performance dealcoholized organosilicon adhesive which is a high-performance dealcoholized sealant prepared by compounding an alkoxy-terminated polydimethylsiloxane base adhesive with a coupling agent as a bonding assistant. The invention also provides a preparation method of the high-performance dealcoholized organosilicon adhesive. The high-performance dealcoholized organosilicon adhesive shortens the surface viscosity reduction time, obviously enhances the curing speed, and satisfies the requirements of most industries for enhancing production efficiency and shortening procedure time consumption. No viscosity peak exists in the production process, thereby greatly enhancing the production and lowering the production risk. The high-performance dealcoholized organosilicon adhesive has favorable bonding property, and can satisfy the bonding requirements of most substrates. Due to the enhancement of the storage stability, the allowed storage time of the product is up to 12 months or above, thereby reducing the loss caused by performance reduction due to transportation and storage.

Description

technical field [0001] The invention relates to a high-performance dealcoholized organic silica gel and a preparation process thereof. Background technique [0002] The traditional one-component dealcoholized RTV silicone rubber generally uses hydroxyl-terminated polydimethylsiloxane as the base rubber, polyalkoxysilane as the crosslinking agent, organic titanate and its chelate as the catalyst, It is prepared with coupling agent, reinforcing filler, etc. [0003] This traditional technology has the following disadvantages: 1. The surface loses tack for a long time, and the deep curing speed is slow; 2. When it is actually applied to the bonding and sealing of some industries, the adhesion and adhesion to the contacted substrates are not ideal; 3. 1. The activity of terminal hydroxyl groups in the base rubber is too high. When an organic titanate catalyst is added during the production process, a viscosity peak will occur, resulting in a sharp thickening of the rubber mater...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/04C09J11/06C08G77/38
Inventor 刘学林陈慧鹏
Owner FOSHAN SILTOP NEW MATERIAL CO LTD
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