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Single-component dealcoholized transparent silicone sealant, preparation method and application thereof

A silicone sealant, dealcoholized technology, applied in adhesives, adhesive additives, non-polymer adhesive additives, etc., can solve problems such as unsatisfactory comprehensive performance, poor storage stability, and easy yellowing of rubber materials. Achieve good economic and social benefits, low production cost, simple and feasible process

Active Publication Date: 2019-01-29
GUANGZHOU GLORYSTAR CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also some papers and patents in this area in China, but there are still some shortcomings, such as the problem of easy yellowing of rubber, poor adhesion, poor storage stability, etc. These defects exist more or less, resulting in insufficient comprehensive performance. ideal

Method used

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  • Single-component dealcoholized transparent silicone sealant, preparation method and application thereof
  • Single-component dealcoholized transparent silicone sealant, preparation method and application thereof
  • Single-component dealcoholized transparent silicone sealant, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] A one-component dealcoholized transparent silicone sealant, prepared by the following method:

[0042] (1) Put 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 20000mPa·s, 10 parts of dimethyl silicone oil, and 3 parts of tetramethoxysilane into a stirred tank, room temperature, vacuum Stir evenly in the state, then add 0.006 parts of sodium hydroxide, stir in vacuum for 30 minutes, then add 0.002 parts of acetic acid, and continue vacuum stirring for 70 minutes to obtain polydimethylsiloxane terminated by polyalkoxy groups.

[0043] (2) Add 100 parts of polyalkoxy-terminated polydimethylsiloxane and 4 parts of methyltrimethoxysilane to a planetary mixer, vacuumize and stir for 20 minutes, and add BET with a specific surface area of ​​150m 2 10 parts / g of hydrophilic fumed silica, vacuumed and stirred at high speed for 40min, followed by adding 1 part of N-β-(aminoethyl)-γ-aminopropyltrimethoxysilane, 0.5 parts of γ-glycidyl ether Oxypropyltrimethox...

Embodiment 2

[0045] A one-component dealcoholized transparent silicone sealant, prepared by the following method:

[0046] (1) Put 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 80000mPa·s and 2 parts of tetramethoxysilane into a stirring tank, stir evenly under vacuum, and then add 0.004 parts Sodium hydroxide, stirred at room temperature in vacuum for 30 minutes, then added 0.0015 parts of acetic acid, and continued to stir in vacuum for 70 minutes to obtain polydimethylsiloxane end-capped with polyalkoxy groups.

[0047](2) Add 100 parts of polyalkoxy-terminated polydimethylsiloxane and 4 parts of vinyltrimethoxysilane to a planetary mixer, vacuumize and stir for 20 minutes, and add BET with a specific surface area of ​​150m 2 10 parts / g of hydrophobic fumed silica, vacuumed and stirred at high speed for 40 minutes, followed by adding 1 part of γ-aminopropyltrimethoxysilane, 0.5 parts of β-(3,4-epoxycyclohexane) ethyl trimethyl Oxysilane, 0.3 parts of dibutyltin bis...

Embodiment 3

[0049] A one-component dealcoholized transparent silicone sealant, prepared by the following method:

[0050] (1) Put 100 parts of α,ω-dihydroxypolydimethylsiloxane with a viscosity of 80000mPa·s and 2 parts of tetramethoxysilane into a stirring tank, stir evenly under vacuum, and then add 0.004 parts Potassium hydroxide, stirred at room temperature in vacuum for 30 minutes, then added 0.0015 parts of phosphoric acid, and continued to stir in vacuum for 70 minutes to obtain polydimethylsiloxane terminated by polyalkoxy groups.

[0051] (2) Add 100 parts of polyalkoxy-terminated polydimethylsiloxane and 3 parts of tetraethoxysilane to a planetary mixer, vacuumize and stir for 20 minutes, and add BET with a specific surface area of ​​150m 2 10 parts / g of hydrophilic fumed silica, vacuumed and stirred at high speed for 40min, followed by adding 1 part of γ-aminopropyltriethoxysilane, 0.5 parts of N-β-(aminoethyl)-γ-aminopropyl Trimethoxysilane, 0.3 parts of dibutyltin dilaurate,...

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Abstract

The invention relates to single-component dealcoholized transparent silicone sealant, a preparation method and an application thereof and belongs to the technical field of organic silicon sealant. Thesealant is prepared from, by weight, 100 parts of polyalkoxy-terminated polydimethylsiloxane, 0-10 parts of dimethyl silicone oil, 2-6 parts of a crosslinker, 5-15 parts of filler, 0.8-2.5 parts of atackifier, 0.1-0.6 parts of a tin catalyst and 0.2-2 parts of a hydroxyl group remover. The sealant has great transparency, is convenient to use and good in storage stability, has good adhesive force, is anti-yellowing and is free of corrosion and pollution on a base material. The sealant can be extensively used for sealing adhesion of electronic appliances, circuit boards, mirrors, art crafts, LED lamps and the like.

Description

technical field [0001] The invention relates to the technical field of silicone sealant, in particular to a one-component dealcoholized transparent silicone sealant and its preparation method and application. Background technique [0002] With the rapid development of industries such as electronic appliances, automobile transportation, civil engineering, and office equipment, the demand for silicone sealants is increasing. General deacetate and deketoxime silicone rubbers are corrosive to metal or copper, so they are not suitable for use in electronic components. Deacetone silicone rubber has superior performance but is expensive, while dealcoholized silicone rubber is non-corrosive to metals. , and the price is low, it can be widely used in electronic products, and has become a research hotspot. [0003] Generally dealcoholized silicone sealants use α, ω-dihydroxy-dimethylsiloxane (107 silicone rubber), methyltrimethoxysilane as crosslinking agent, titanium complex as cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC08L2201/10C08L2205/025C09J11/04C09J11/06C09J183/04C08L83/04C08K13/02C08K3/36C08K5/544
Inventor 曾祥雷胡新嵩邓丽华张少鸿谢剑波夏文龙陈浩英
Owner GUANGZHOU GLORYSTAR CHEM
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