Dealcoholized silicone adhesive as well as preparation method and application thereof

A technology of silicone glue and dealcoholization, which is applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., and can solve problems such as improper matching of organotin and stabilizer, high raw material cost, and unstable storage period. , to achieve the effect of fast curing and storage stability, simple production process and good storage stability

Inactive Publication Date: 2020-03-27
东莞市博君来胶粘材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Alcohol-type transparent adhesives produced by alkoxy-capped 107, stabilizers, organotin chelates, fumed white carbon black, coupling agents, etc., have yellowed due to the presence of capping agents, chelating agents, and the introduction of coupling agents. functional groups, causing the colloid to turn yellow; in addition, the improper combination of organotin and stabilizer can easily lead to unstable storage period
[0006] The alcohol type produced by alkoxy-capped 107, titanate, fumed silica, coupling agent, etc. is transparent and has a relatively stable storage period. It is easy to have a color reaction with highly active titanate, the selection range of coupling agent is small, and the bonding performance is poor
[0007] The alcohol-type transparent adhesive produced by hydroxyl-terminated 107, fumed silica, α-series silane crosslinking agent, coupling agent, etc. has simple production process, stable storage and good bonding performance, but due to the high activity of α-series silane Introduced, the colloid is easy to yellow, easy to shrink, poor water resistance and adhesion, etc., and the production of α-series silanes is easy to cause environmental problems, limited production capacity, and high prices

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] This embodiment provides a kind of dealcohol type silicone glue, and its preparation method comprises the following comprising:

[0032] (1) Weigh 1000g of hydroxyl-terminated polydimethylsiloxane, 25g of alcohol-type crosslinking agent, 20g of titanium chelate catalyst, 80g of fumed silica, 100g of plasticizer, and 5g of composite coupling agent, and set aside. Among them, the hydroxyl-terminated polydimethylsiloxane is α, ω-dihydroxypolydimethylsiloxane, specifically, the commercially available hydroxyl-terminated polydimethylsiloxane can be selected, and its viscosity is 80000mPa·s; The agent is a mixture of 15g methyltrimethoxysilane and 10g vinyltrimethoxysilane; the titanium chelate catalyst is diisopropoxybis(trifluoroacetoacetate)titanium and ditert-butoxy-bis( Ethyl trifluoroacetoacetate) Titanium mixed in equal mass ratio; Fumed silica is hydrophilic fumed silica with a specific surface area of ​​150m 2 / g; the plasticizer is simethicone, and its viscosity is...

Embodiment 2

[0036] This embodiment provides a kind of dealcohol type silicone glue, and its preparation method comprises the following comprising:

[0037] (1) Weigh 1000g of hydroxyl-terminated polydimethylsiloxane, 25g of alcohol-type crosslinking agent, 30g of titanium chelate catalyst, 80g of fumed silica, 150g of plasticizer, and 5g of composite coupling agent, and set aside. Among them, the hydroxyl-terminated polydimethylsiloxane is α, ω-dihydroxypolydimethylsiloxane, specifically, the commercially available hydroxyl-terminated polydimethylsiloxane can be selected, and its viscosity is 20000mPa·s; The agent is a mixture of 15g methyltrimethoxysilane and 10g vinyltrimethoxysilane; the titanium chelate catalyst is 1,3-propyldioxy-bis(trifluoroacetoacetate)titanium, 1,2 -A mixture of propyldioxy-bis(trifluoroacetoacetate)titanium and dialkoxybis-bis(hexafluoroacetylacetonate)titanium in equal mass ratio; fumed white carbon black is a hydrophilic gas-phase method Silica, which has a s...

Embodiment 3

[0041] This embodiment provides a kind of dealcohol type silicone glue, and its preparation method comprises the following comprising:

[0042] (1) Weigh 1000g of hydroxyl-terminated polydimethylsiloxane, 30g of alcohol-type crosslinking agent, 30g of titanium chelate catalyst, 120g of fumed silica, 10g of plasticizer, and 10g of composite coupling agent, and set aside. Among them, the hydroxyl-terminated polydimethylsiloxane is α, ω-dihydroxypolydimethylsiloxane, specifically, the commercially available hydroxyl-terminated polydimethylsiloxane can be selected, and its viscosity is 20000mPa·s; The catalyst is methyltrimethoxysilane; the titanium chelate catalyst is 1,2-propyldioxy-bis(trifluoroacetoacetate)titanium and dialkoxybis-bis(hexafluoroacetylacetonate)titanium A mixture mixed in equal mass ratio; fumed silica is hydrophobic fumed silica with a specific surface area of ​​150m 2 / g; the plasticizer is polyether polyol with a viscosity of 500mPa·s; there are two differe...

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Abstract

The invention discloses a dealcoholized silicone adhesive as well as a preparation method and application thereof and belongs to the technical field of organic silicone sealants. The dealcoholized silicone adhesive comprises the following components in parts by weight: 80-120 parts of hydroxyl-terminated polydimethylsiloxane, 1-5 parts of an alcohol type cross-linking agent, 1-5 parts of a titanium chelate catalyst, 6-12 parts of fumed silica, 0-15 parts of a plasticizer and 0.5-1.5 parts of a composite coupling agent. The embodiment of the invention provides the dealcoholized silicone adhesive which has the characteristics of low raw material cost, simple production technique, favorable storage stability, favorable binding property, favorable yellowing resistance and the like. According to the dealcoholized silicone adhesive, the titanium chelate with a dialkoxy titanium bis (beta-diketone compound) structure is used as the catalyst, and hydroxyl-terminated polydimethylsiloxane can bedirectly catalyzed to react with the alcohol type cross-linking agent, so that the dealcoholized silicone adhesive which is stable in storage and does not turn yellow is prepared.

Description

technical field [0001] The invention relates to the technical field of silicone sealant, in particular to a dealcoholized silicone sealant and its preparation method and application. Background technique [0002] Neutral silicone sealants are divided into dealcoholized and deoxime-type. Compared with de-oxime-type and de-acidified silicone sealants, the dealcoholized type has low odor, no corrosion, environmental protection and has good resistance to glass, metal and most substrates. Good adhesion. With the rapid development of industries such as electronic appliances, automobile transportation, and civil engineering, the demand for dealcoholized silicone sealants is increasing, and it has become an important research project for sealant companies. [0003] At present, the dealcoholized sealants in the domestic market still have some shortcomings, such as yellowing of the rubber, poor bonding performance, poor storage stability, high production costs, and complicated produc...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04
CPCC09J11/04C09J183/04C08K7/26
Inventor 程再乐余海旋胡利华王浩张爱学
Owner 东莞市博君来胶粘材料科技有限公司
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