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Preparation method of single-component transparent alcohol type room-temperature vulcanized organic silicon sealant

A technology of room temperature vulcanization and silicone, applied in the direction of adhesives, non-polymer adhesive additives, adhesive additives, etc., can solve the problems of high viscosity, affecting production efficiency, poor storage stability, etc., and achieve good hardness and good storage stability , The effect of improving mechanical properties

Inactive Publication Date: 2021-10-08
新纳奇材料科技江苏有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because organotin is used as the catalyst, it is easy to form a monoalkoxy polymer with no crosslinking activity, which has the problem of poor storage stability; if titanate is used as the catalyst, it will form due to the interaction between titanate and the terminal hydroxyl group of 107 silicone rubber. Viscosity peaks will appear in the false cross-linked state, seriously affecting production efficiency

Method used

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  • Preparation method of single-component transparent alcohol type room-temperature vulcanized organic silicon sealant
  • Preparation method of single-component transparent alcohol type room-temperature vulcanized organic silicon sealant

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Follow the steps below to prepare a one-component transparent alcohol-type room temperature vulcanizing silicone sealant:

[0025] (1) Add 100 parts of self-made alkoxy-terminated polydimethylsiloxane into the reaction kettle, add 13 parts of dimethyl silicone oil as a plasticizer, and then add 3.0 parts of methyltrimethoxysilane, methyl 1.30 parts of phenyltriethoxysilane, 1.20 parts of aminopropyltriethoxysilane, 1.0 part of triaminopropyltrimethoxysilane, and finally add 0.3 parts of silazane, stir and mix at high speed for 15 minutes;

[0026] (2) Add 8.0 parts of fumed silica reinforcing filler in batches, stir for 5 minutes after adding the filler, then continue vacuum stirring for 15 minutes, and control the temperature of the feed during the entire powder addition process;

[0027] (3) Add 4.6 parts of stabilizer and 6.5 parts of dibutyltin dilaurate at a suitable temperature, stir thoroughly for 5 minutes, and then continue stirring for 15 minutes under vacuum....

Embodiment 2

[0029] Follow the steps below to prepare a one-component transparent alcohol-type room temperature vulcanizing silicone sealant:

[0030] (1) Add 100 parts of self-made alkoxy-terminated polydimethylsiloxane into the reaction kettle, add 13 parts of dimethyl silicone oil as a plasticizer, and then add 3.0 parts of methyltrimethoxysilane, methyl 1.30 parts of phenyltriethoxysilane, 1.20 parts of aminopropyltriethoxysilane, 1.0 part of triaminopropyltrimethoxysilane, and finally add 0.3 parts of silazane, stir and mix at high speed for 15 minutes;

[0031] (2) Add 8.0 parts of fumed silica reinforcing filler in batches, stir for 5 minutes after adding the filler, then continue vacuum stirring for 15 minutes, and control the temperature of the feed during the entire powder addition process;

[0032] (3) Add 4.6 parts of stabilizer and 6.5 parts of organosilicon chelated tin at a suitable temperature, stir thoroughly for 5 minutes, and then continue to stir in vacuum for 15 minute...

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Abstract

The invention discloses a preparation method of a single-component transparent alcohol type room temperature vulcanized organic silicon sealant. The organic silicon sealant comprises the following components in parts by mass: 100 parts of alkoxy silicone oil, 10-20 parts of dimethyl silicone oil, 0.5-10 parts of a silane coupling agent, 0.1-0.5 parts of silazane, 5-10 parts of fumed silica, 3-6 parts of a stabilizer and 5-8 parts of a chelated tin catalyst, wherein the silane coupling agent is a mixture of methyl trimethoxy silane, methyl triethoxy silane, aminopropyl triethoxy silane and triaminopropyl trimethoxy silane. By adopting the preparation method of the single-component transparent alcohol type room temperature vulcanized organic silicon sealant with the structure, the prepared room temperature vulcanized organic silicon sealant has the characteristics of good storage stability, good adhesive property to various base materials such as metal and plastic, relatively good hardness, relatively good elongation at break and deep curing.

Description

technical field [0001] The invention relates to the technical field of silicone sealant, in particular to a preparation method of a one-component transparent alcohol type room temperature vulcanized silicone sealant. Background technique [0002] Silicone rubber is widely used in aerospace, construction, electronics, medical and health fields due to its excellent weather resistance, high and low temperature resistance, electrical insulation and physiological compatibility. According to its cross-linking vulcanization method, it can be divided into heat vulcanized silicone rubber and room temperature vulcanized silicone rubber; it can also be divided into addition type silicone rubber and condensation type silicone rubber. According to the by-products released during vulcanization, condensation silicone rubber can be divided into dealcoholized, deacidified, ketoxime, acetone, and amidated products. Deacidification-type silicone rubber has the characteristics of fast vulcaniz...

Claims

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Application Information

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IPC IPC(8): C09J183/04C09J11/04C09J11/06
CPCC09J183/04C09J11/04C09J11/06C08L2205/025C08L2201/10C08L83/04C08K5/5419C08K5/544C08K3/36
Inventor 余跃徐守彬
Owner 新纳奇材料科技江苏有限公司