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Organic silicon thermoplastic elastomer and preparation method for same

A thermoplastic elastomer and organosilicon technology is applied in the field of preparation of organosilicon polymer materials, which can solve the problems of non-repeatable processing and inability to fully exert the heat resistance of organosilicon materials, and achieve the effects of easy industrial production and simple preparation process.

Active Publication Date: 2015-01-14
CHENGDU GUIBAO SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among the materials prepared by the above method, the organosilicon material is only one of the components of the final thermoplastic material, and the heat resistance and high temperature resistance of the organosilicon material cannot be fully utilized in use.
At present, once the silicone elastomer material is prepared, it cannot be reprocessed once it is cross-linked and formed, and there are no relevant reports on thermoplastic elastomers whose polymer composition is all silicone materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] At 25°C, dissolve 50 grams of vinyl-containing methyl silicone rubber in 250 milliliters of toluene and dichloromethane mixed solution, then add 100 grams of MQ resin with a molecular weight of 5500, mix well and add hydrogen-containing polysiloxane 0.15 grams and 0.05 grams of chloroplatinic acid, wherein the mass ratio of vinyl to silicone rubber is 0.011:1. After adding the catalytic system, the temperature was raised to 80°C for 50 minutes, and then the solvent was removed by distillation under reduced pressure to prepare a silicone thermoplastic elastomer. The softening point of the product was 84°C, the tensile strength was 2.18 MPa, and the elongation at break was 314%.

Embodiment 2

[0046] At 25°C, dissolve 50 grams of vinyl-containing methyl silicone rubber in a mixture of 250 ml of toluene and tetrahydrofuran, then add 120 grams of vinyl-containing TD resin with a molecular weight of 8500, mix well and add 1,1 - 0.3 g of bis(tert-butylperoxy) 3,3,5-trimethylcyclohexane, wherein the mass ratio of vinyl to silicone rubber is 0.002:1. After adding the peroxide, stir for 30 minutes, remove the solvent, and then raise the temperature to 150 o C was reacted for 30 minutes to prepare a silicone thermoplastic elastomer with a softening point of 90° C., a tensile strength of 3.11 MPa, and an elongation at break of 216%.

Embodiment 3

[0048] At 25°C, dissolve 20 grams of vinyl-based methyl silicone rubber and 20 grams of phenyl silicone rubber in 250 ml of tetrahydrofuran, and then add 120 grams of vinyl-based MQ resin with a molecular weight of 11,500 and a molecular weight of 9,000. 30 grams of TD silicone resin, mix well and add 0.8 grams of 1,1-bis(tert-butylperoxy) 3,3,5-trimethylcyclohexane, wherein the mass ratio of vinyl to silicone rubber is 0.012 : 1. After adding the peroxide, stir for 30 minutes, remove the solvent, and then raise the temperature to 150 o C was reacted for 10 minutes to prepare a silicone thermoplastic elastomer. The softening point of the obtained product was 90°C, the tensile strength was 3.41 MPa, and the elongation at break was 200%.

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Abstract

The invention discloses an organic silicon thermoplastic elastomer material and a preparation method for the same. The organic silicon thermoplastic elastomer material is characterized in that a thermoplastic elastomer is composed of organic silicon rubber, organic silicon resin and a crosslinking system; and the thermoplastic elastomer is prepared according to the following process steps of: preparing the thermoplastic elastomer by enabling the organic silicon rubber, the organic silicon resin and the crosslinking system to achieve intermolecular blending in solution, or uniformly mixing the organic silicon rubber, the organic silicon resin and the crosslinking system via a kneader or a double-screw extruder in a temperature condition of greater than 100 DEG C, and then preparing the high-performance dynamically-vulcanized organic silicon thermoplastic elastomer. Compared with other thermoplastic elastomers, the material is more capable of exerting the high-temperature resistance and ultraviolet resistance of organic silicon materials, excellent in optical transmission, and capable of being widely applied to the fields of solar energy, buildings, automobiles and medical treatment.

Description

Technical field: [0001] The invention relates to an organosilicon thermoplastic elastomer material and a preparation method thereof, belonging to the field of organosilicon polymer material preparation. technical background: [0002] Thermoplastic elastomers have both the performance of elastic rubber and the processing performance of plastics, and can be repeatedly processed, which is of great economic value in the development of future materials. Currently, widely used thermoplastic elastomer materials include polystyrenes, polyolefins, and polyurethanes. Silicone materials are used in many industries such as construction, electronics, water treatment, aerospace and energy due to their excellent weather resistance and high and low temperature resistance. Existing silicone materials are usually molded at one time by room temperature or high temperature cross-linking method, which cannot be repeatedly processed. Therefore, silicone thermoplastic elastomer materials have att...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/04C08L83/05C08K5/14C08J3/24
Inventor 黄强王有治李步春熊婷舒峻郭秋林
Owner CHENGDU GUIBAO SCI & TECH
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