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Preparation method of transparent dealcoholized vulcanizing silicone rubber by quickly curing single components at room temperature

A vulcanized silicone rubber, fast curing technology, applied in the field of preparation of dealcoholized one-component room temperature vulcanized silicone rubber, can solve the problem that the curing speed of silicone rubber does not have fast curing, etc., achieve excellent storage effect, fast vulcanization speed, touch good denaturation effect

Inactive Publication Date: 2017-02-15
湖北环宇化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Application number 201310374663.5 mentions the storage and anti-yellowing performance of the product, and the curing speed of silicone glue prepared by this method does not have the performance of fast curing

Method used

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  • Preparation method of transparent dealcoholized vulcanizing silicone rubber by quickly curing single components at room temperature
  • Preparation method of transparent dealcoholized vulcanizing silicone rubber by quickly curing single components at room temperature
  • Preparation method of transparent dealcoholized vulcanizing silicone rubber by quickly curing single components at room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Under the protection of nitrogen, 100 parts of 20000mPa.s alkoxy-terminated polydimethylsiloxane, 30 parts of plasticizer dimethyl silicone oil and 2 parts of hexamethyldisilazane were mixed with a planetary mixer at 25°C After mixing for 30 minutes, add 18 parts of filler hydrophilic type 150㎡ / g fumed silica, after the dispersion is uniform, remove the low boilers in vacuum, then add 3 parts of methyltrimethoxysilane and 0.25 parts of dibutyltin dilaurate , 1 part of N-(β-aminoethyl)-γ-aminopropyltrimethoxysilane, 1.5 parts of hexamethyldisilazane, vacuum-0.097 to remove low boilers for 30min, move to extruder, press Filling, to obtain a one-component room temperature rapid curing transparent dealcoholized vulcanized silicone rubber.

Embodiment 2

[0031] Under the protection of nitrogen, 100 parts of alkoxy-terminated polydimethylsiloxane with a viscosity of 50000 mPa.s, 15 parts of plasticizer dimethyl silicone oil, and 3 parts of octamethylcyclotetrasilazane were prepared at 25 ° C. After mixing with a planetary mixer, add 18 parts of 200㎡ / g hydrophilic fumed silica. After the dispersion is even, remove the low boilers in a vacuum, and then add 6 parts of methyltripropoxysilane and 0.5 parts of dibutyltin dilaurate in sequence. , 0.8 parts of γ-(2,3-epoxy, propoxy)propyltrimethoxysilane, 1.5 parts of hexamethylcyclotrisilazane, vacuum-0.092Mpa to remove low boilers for 30min, and move to the extruder , pressed out and filled to obtain a one-component room temperature fast-curing transparent dealcoholized vulcanized silicone rubber.

Embodiment 3

[0037] Under the protection of nitrogen, 100 parts of alkoxy-terminated polydimethylsiloxane with a viscosity of 80000mPa.s, 25 parts of plasticizer dimethyl silicone oil and 4 parts of hexamethyldisilazane were used at 25°C After mixing with planetary mixer, add 22 parts of 200㎡ / g hydrophilic fumed silica. After dispersing evenly, remove the low boilers in vacuum, then add 8 parts of vinyltrimethoxysilane, 0.7 parts of dibutyltin dilaurate, N -1 part of (β-aminoethyl)-γ-aminopropyltrimethoxysilane, 2 parts of hexamethylcyclotrisilazane, vacuum-0.095Mpa to remove low boilers for 30min, move to extruder, press Filling, to obtain a one-component room temperature rapid curing transparent dealcoholized vulcanized silicone rubber.

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Abstract

The invention provides a preparation method of transparent dealcoholized vulcanizing silicone rubber by quickly curing single components at room temperature. The preparation method comprises the following steps: under the protection of nitrogen, mixing dimethyl silicon oil serving as a plasticizer, white carbon black serving as a treating agent and alkoxy-terminated polydimethylsiloxane according to a mixture ratio of mass components by using a planetary mixer, then adding hydrophilic fumed silica serving as filler, uniformly dispersing and performing vacuum desorption on low-boiling-point substances; afterwards, sequentially adding a cross-linking agent, a catalyst, a coupling agent and a stabilizer, desorbing the low-boiling-point substances at the vacuum pressure of -0.097 to -0.092Mpa for 30 minutes, moving to an extrusion machine, extruding and filling, thus obtaining the transparent dealcoholized vulcanizing silicone rubber by quickly curing the single components at the room temperature. According to the preparation method provided by the invention, the hydrophilic fumed silica is adopted as the filler, the corresponding white carbon black is added as the treating agent, the defect that the hydrophobic fumed silica subjected to surface treatment is used as the filler in a traditional method is overcome, and the vulcanizing silicone rubber with the characteristics of low cost, high vulcanizing speed, stable viscosity and structure and excellent storage effect is obtained.

Description

technical field [0001] The invention belongs to the technical field of one-component room temperature vulcanized silicone rubber, and in particular relates to a preparation method of dealcoholized one-component room temperature vulcanized silicone rubber with hydrophilic fumed white carbon black as filler. Background technique [0002] In the field of organic silicone sealants, dealcoholized single-component is widely used in bonding and sealing in the fields of construction, electronics, aerospace, automobile industry, medicine and health because of its environmental protection, non-corrosiveness and economy. [0003] Alkoxy-terminated polydimethylsiloxane as base polymer, surface-treated fumed silica as filler, methyltrimethoxysilane as crosslinking agent, organotin as catalyst, aminosilane as adhesion promoter The raw materials of the alcohol-type transparent system are easy to obtain, and no special additives are required. However, the surface-treated hydrophobic fumed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/06C08L83/04C08K13/02C08K3/36C08K5/544C08K5/5419C08K5/5435C08K5/5425
CPCC08K2201/006C08K2201/014C08L83/06C08L83/04C08K13/02C08K3/36C08K5/544C08K5/5419C08K5/5477C08K5/5435C08K5/5425
Inventor 肖坤林杨红波黄小兰
Owner 湖北环宇化工有限公司
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