Neutral alcohol transparent silicone sealant and preparation method thereof

A silicone sealant and alcohol-based technology, which is applied in the direction of adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve the problem of corrosion, unsatisfactory substrate adhesion, and slow curing speed affecting work efficiency, etc. problem, to achieve the effect of solving corrosion, good aging resistance and bonding performance, and fast curing speed

Inactive Publication Date: 2018-12-11
芜湖市颂晖商贸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This traditional technology has the following disadvantages: 1. The glue is corrosive to the surface of some substrates. 2. When it is actually applied to the bonding and sealing of some industries, the adhesion to some substrates is not ideal. 3. In the Slow curing speed affects work efficiency when the temperature is low in winter

Method used

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  • Neutral alcohol transparent silicone sealant and preparation method thereof
  • Neutral alcohol transparent silicone sealant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A neutral alcohol-type transparent silicone sealant, calculated in parts by weight, comprising the following components:

[0025] 53 parts of alkoxy-terminated polydimethylsiloxane, 20 parts of plasticizer, 40 parts of thixotropic agent, 2 parts of crosslinking agent, 7 parts of 3-aminopropyltrimethoxysilane and 1.6 parts of propyl titanate share. The thixotropic agent is a mixture of fumed silica, polyethylene wax and fumed white carbon black. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0026] The preparation method of plasticizer is:

[0027] Weigh 65wt% methyltrichlorosilane and 35wt% white oil and mix to obtain a mixed monomer, heat up the mixed monomer oil bath to 60°C, add stannous octoate and ethylene glycol under inert gas protection conditions, and react for 1h, Then cool to room temperature and then treat with concentrated hydrochloric acid, then neutralize to neutral with alkali, filter to obtain the filtrate, an...

Embodiment 2

[0033] A neutral alcohol-type transparent silicone sealant, calculated in parts by weight, comprising the following components:

[0034] 45 parts of alkoxy-terminated polydimethylsiloxane, 15 parts of plasticizer, 50 parts of thixotropic agent, 0.1 part of crosslinking agent, 1 part of 3-aminopropyltriethoxysilane and tert-butyl titanate 0.1 part of ester. The thixotropic agent is a mixture of fumed silica, polyethylene wax and fumed white carbon black. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0035] The preparation method of plasticizer is:

[0036] Weigh 60wt% methyltrichlorosilane and 40wt% white oil and mix to obtain a mixed monomer, heat up the mixed monomer oil bath to 55°C, add stannous octoate and ethylene glycol under inert gas protection conditions, and react for 1.6h , then cooled to room temperature and then treated with concentrated hydrochloric acid, then neutralized to neutral with alkali, filtered to obtain the ...

Embodiment 3

[0039] A neutral alcohol-type transparent silicone sealant, calculated in parts by weight, comprising the following components:

[0040] 60 parts of alkoxy-terminated polydimethylsiloxane, 25 parts of plasticizer, 30 parts of thixotropic agent, 1.7 parts of crosslinking agent, N-(β-aminoethyl)-γ-aminopropyltrimethoxy 10 parts of base silane and 3 parts of tert-butyl titanate. The thixotropic agent is a mixture of fumed silica, polyethylene wax and fumed white carbon black. The crosslinking agent is a mixture of ethyl orthosilicate and methyltriethoxysilane.

[0041] The preparation method of plasticizer is:

[0042] Weigh 70wt% methyltrichlorosilane and 30wt% white oil and mix to obtain a mixed monomer, heat up the mixed monomer oil bath to 50°C, add stannous octoate and ethylene glycol under inert gas protection conditions, and react for 2 hours, Then cool to room temperature and then treat with concentrated hydrochloric acid, then neutralize to neutral with alkali, filter...

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Abstract

The invention puts forward a neutral alcohol transparent silicone sealant and a preparation method thereof. The neutral alcohol transparent silicone sealant comprises the following components in partsby weight: 70-90 parts of alkoxy-terminated polydimethylsiloxane, 15-25 parts of a plasticizer, 30-50 parts of a thixotropic agent, 0.1-3 parts of a crosslinking agent, 1-10 parts of a tackifier and0.1-3 parts of a catalyst. The plasticizer is mainly prepared from methyltrichlorosilane and white oil. The preparation method comprises the following steps: 1) dehydrating the alkoxy-terminated polydimethylsiloxane and thixotropic agent, and cooling to room temperature to obtain a matrix; and 2) adding the plasticizer, crosslinking agent, tackifier and catalyst into the matrix, and stirring in avacuum condition, thereby obtaining the neutral alcohol transparent silicon sealant. The neutral alcohol transparent silicone sealant not only has good ageing resistance and binding property, and is high in curing speed.

Description

technical field [0001] The invention belongs to the technical field of building sealing materials, and in particular relates to a neutral alcohol type transparent silicone sealant and a preparation method thereof. Background technique [0002] Silicone sealants have excellent temperature resistance, weather resistance, anti-aging, no cracks, shock resistance and moisture resistance, and are widely used in construction, electronic appliances, automobiles, and aerospace fields. Silicone sealing materials are widely used as building sealing materials, but generally low-elongation neutral alcohol-type transparent silicone sealants cannot meet the requirements of the high displacement capacity of concrete joints, and their bonding performance with concrete itself is not good. It is easy to tear, so that the sealing effect is lost, and the cost of re-maintenance is too high. [0003] The traditional one-component ketoxime type room temperature vulcanizing transparent silicone sea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/06C09J11/04C09J11/06C09J11/08
Inventor 汪泽维汪鹏
Owner 芜湖市颂晖商贸有限公司
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