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

A silicon rubber and dealcoholized technology, which is applied in chemical instruments and methods, adhesives, and other chemical processes, can solve the problems of high cost platinum catalysts, affecting the overall performance of rubber, and viscosity peaks, etc., to achieve easy operation, cost saving, The effect of improving productivity

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

The silicone rubber contains a platinum catalyst with high cost, and during the preparation process, the crosslinking agent and titanate catalyst are added directly at the same time, resulting in a peak viscosity and affecting the overall performance of the resulting rubber

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

[0066] (1) Preparation of the base material, 100 parts of α, ω-dihydroxypolydimethylsiloxane with a viscosity of 20000cps, 80 parts of aluminum hydroxide, and 140 parts of aluminum oxide were placed in a power mixer at temperature 130°C, vacuum degree -0.09MPa dehydration and blending for 200min, isolated from the air and cooled to room temperature to obtain the base material;

[0067] (2) Take 100 parts of the base material and add it to the power mixer, vacuumize to -0.1MPa, stir for 10 minutes, add 5 parts of crosslinking agent, vacuumize to -0.1MPa, and stir for 30 minutes;

[0068] (3) Add 0.32 parts of γ-aminopropyltriethoxysilane, 0.53 parts of vinyltriethoxysilane, 0.21 parts of N-aminoethyl-γ-aminopropyltrimethoxy, and vacuum to -0.1MPa , stirring for 35min;

[0069] (4) Add 1.35 parts of isopropyl titanate, dilute it with 10cps polydimethylsiloxane 1.5 times, add it together, and vacuumize to -0.1MPa, pass in nitrogen, stir for 35min, and then vacuumize To -0.1MPa,...

Embodiment 2

[0071] (1) Preparation of the base material, 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 80000cps, 180 parts of silicon carbide, 140 parts of ferric oxide, and 130 parts of zinc carbonate were mixed in a power mixer Inside, dehydrate and blend at a temperature of 180°C and a vacuum of -0.01MPa for 30 minutes, and cool to room temperature in isolation from the air to obtain the base material;

[0072] (2) Take the base material and add it to the power mixer, evacuate to -0.3MPa, stir for 80 minutes, add 10 parts of tetrapropoxysilane, 5 parts of methyltrihexyloxysilane, dimethoxydiethoxysilane 5 parts, vacuumize to -0.3MPa, stir for 100min;

[0073] (3) Add 2 parts of N-aminoethyl-γ-aminopropyltrimethoxysilane, 3 parts of γ-methacryloxypropyltrimethoxysilane, divinyltriaminopropyltrimethoxysilane 3 parts, vacuumed to -0.3MPa, stirred for 50min;

[0074] (4) Mix tetraisopropyl titanate and 50cps polydimethylsiloxane in a volume ratio of 1:20, a total o...

Embodiment 3

[0076] (1) Preparation of the base material, 100 parts of α, ω-dihydroxy polydimethylsiloxane with a viscosity of 2000cps, 2 parts of white carbon black, 5 parts of quartz powder, and 3 parts of talc powder were mixed in a power mixer , dehydrated and blended at a temperature of 80°C and a vacuum of -0.3MPa for 280min, and cooled to room temperature in isolation from the air to obtain the base material;

[0077] (2) Take the base material and add it to a power mixer, vacuumize to -0.01MPa, add 0.1 part of tetrapropoxysilane, 0.3 part of methyltrihexyloxysilane, vacuumize to -0.01MPa, and stir for 5 minutes;

[0078] (3) Add 0.05 parts of vinyltriethoxysilane and 0.05 parts of N-aminoethyl-γ-aminopropyltrimethoxysilane, vacuumize to -0.01MPa, and stir for 5 minutes;

[0079] (4) Mix 0.1 parts of tetraisopropyl titanate and 1 cps of polydimethylsiloxane at a volume ratio of 1:0.5, add in, and vacuumize to -0.3MPa, and then pass in helium, and stir for 5 minutes. Then evacuate to ...

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Abstract

The invention relates to a single-component catalytic dealcoholized room temperature vulcanized (RTV) silicone rubber which comprises the following components in parts by weight: 100 parts of alpha, omega-dihydroxyl polydimethylsiloxane, 10-450 parts of function filler, 0.4-20 parts of crosslinking agent, 0.1-8 parts of coupling agent and 0.1-12 parts of catalyst. 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: preparing a ground mass, namely dewatering and blending the alpha, omega-dihydroxyl polydimethylsiloxane and the function filler to obtain the ground mass; stirring the taken ground mass in a vacuum state, adding the crosslinking agent, and stirring the materials in a vacuum state; adding the coupling agent, and stirring the materials; and adding the catalyst, vacuumizing, introducing inert gas, stirring, vacuumizing, and stirring to obtain the single-component catalytic dealcoholized RTV silicone rubber. The method provided by the invention has the advantages of no generation of viscosity peak, simple process and cost saving; and the single-component catalytic dealcoholized RTV silicone rubber has excellent comprehensive properties.

Description

technical field [0001] The invention relates to the field of silicone rubber preparation, in particular to a single-component catalytic dealcoholization type 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 o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08K13/02C08K3/22C08K5/5425C08K5/5415C08K3/34C08K3/26C09J183/06C09J11/06C09J11/04C09K3/10
Inventor 陈芳张辉翁祝强蓝春霞
Owner 兆舜科技(广东)有限公司
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