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Single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber and preparation method thereof

A dealcoholized, silicone rubber technology, applied in chemical instruments and methods, adhesives, other chemical processes, etc., can solve the problems that the physical properties and storage stability of silicone rubber cannot meet the existing needs

Inactive Publication Date: 2012-10-31
兆舜科技(广东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In the prior art, the physical properties and storage stability of silicone rubber still cannot meet the existing needs

Method used

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  • Single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber and preparation method thereof
  • Single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber and preparation method thereof
  • Single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] (1) Preparation of the base material, 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 50000cps, 10 parts of dimethyl silicone oil with a viscosity of 5000cps, 100 parts of hydrophilic fumed silica, six methyl 1 part of base disilazane was dehydrated and blended in a power mixer at a temperature of 140°C and a vacuum degree of -0.09MPa for 180min, and cooled to room temperature with isolated air to obtain a base material;

[0066] (2) Take 100 parts of the base material and add it to the power mixer, evacuate to -0.09MPa, stir for 10 minutes, add 15 parts of chloromethyltriethoxysilane, evacuate to -0.1MPa, and stir for 30 minutes;

[0067] (3) Add 2 parts of γ-(2,3-glycidoxy)propyltrimethoxysilane, vacuumize to -0.1MPa, and stir for 30 minutes to obtain the finished product.

Embodiment 2

[0069] (1) Preparation of the base material, 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 1000cps, 1 part of diethyl silicone oil with a viscosity of 10cps, 2 parts of precipitated white carbon black, hexamethyldisiloxane Dehydrate and blend 0.1 part of azane in a dynamic mixer at a temperature of 80°C and a vacuum of -0.01MPa for 30 minutes, and cool to room temperature with isolated air to obtain a base material;

[0070] (2) Take 100 parts of base glue and add it to a power mixer, vacuumize to -0.01MPa, add 0.1 part of dichloromethyltriethoxysilane, vacuumize to -0.01MPa, and stir for 10 minutes;

[0071] (3) Add 0.1 part of N-aminoethyl-γ-aminopropyltrimethoxysilane, vacuumize to -0.01MPa, and stir for 3 minutes to obtain the finished product.

Embodiment 3

[0073] (1) Preparation of the base material, 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 80000cps, 150 parts of diethyl silicone oil with a viscosity of 9000cps, 100 parts of precipitated white carbon black, and 50 parts of nano-alumina , 10 parts of magnesium oxide, 10 parts of hexamethyldisilazane, dehydration and blending in a power mixer at a temperature of 200 ° C and a vacuum degree of -0.3 MPa for 280 min, and cooling to room temperature with isolated air to obtain a base material;

[0074] (2) Take 100 parts of the base glue and add it to the power mixer, evacuate to -0.3MPa, stir for 80 minutes, add 10 parts of chloromethyldiethylaminodiethoxysilane, dichloromethyltriethoxy 20 parts of silane, vacuum to -0.3MPa, stir for 5min;

[0075] (3) Add 2 parts of vinyltriethoxysilane, 2 parts of N-methyl-γ-aminopropyltrimethoxysilane, 4 parts of divinyltriaminopropyltrimethoxysilane, and vacuum to -0.3 MPa, stirred for 50min to obtain the finished prod...

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Abstract

The invention relates to a single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber. A ground mass comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxyl polydimethylsiloxane, 1-150 parts of plasticizer, 1-150 parts of nano level reinforced filler and 0.1-20 parts of hydroxyl clearing agent; and the single-component catalytic dealcoholized RTV silicone rubber comprises the following components in parts by weight: 100 parts of ground mass, 0.1-30 parts of crosslinking agent and 0.1-8 parts of coupling agent. The invention also relates to a preparation method of the single-component catalytic dealcoholized RTV silicone rubber, and the method comprises the following steps of: dewatering and blending the alpha, omega-dyhydroxyl polydimethylsiloxane, the plasticizer, the nano level reinforced filler and the hydroxyl clearing agent to obtain the ground mass; taking the ground mass, vacuumizing, stirring, adding the crosslinking agent, vacuumizing and stirring; and adding the coupling agent, vacuumizing and stirring to obtain the single-component catalytic dealcoholized RTV silicone rubber. The method provided by the invention has the advantages that a nano material is adopted as the filler, the plasticizer is added, so that the single-component catalytic dealcoholized RTV silicone rubber has better physical properties; and the nano filler is treated by adopting the silane, thus the storage life of a sealant is prolonged.

Description

technical field [0001] The invention relates to the field of silicone rubber, in particular to a one-component dealcoholized RTV silicone rubber sealant and a preparation method thereof. Background technique [0002] With the rapid development of electronics, construction and aviation industries, silicone room temperature vulcanized silicone rubber has been widely used in the industry due to its neutral properties, non-corrosiveness to substrates, non-toxicity, strong adaptability and low cost. And the favor of researchers and get rapid development. At the same time, one-component room temperature vulcanized silicone rubber (RTV), that is, it can be cured at room temperature without adding other components, easy to use, small shrinkage after curing, good adhesion to most materials, and good electrical insulation Resistance, weather resistance, flex resistance, high temperature resistance and aging resistance, etc. It has a very wide range of applications in construction, e...

Claims

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Application Information

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IPC IPC(8): C09J183/06C09J11/08C09J11/04C09K3/10
Inventor 陈芳翁祝强张辉陈军蓝春霞
Owner 兆舜科技(广东)有限公司
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