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Polyamide organic silicon thermoplastic elastomer and preparation method thereof

A thermoplastic elastomer and polyamide-based technology, which is applied in the field of polyamide-based silicone thermoplastic elastomer and its preparation, can solve the problems of macroscopic phase separation, poor compatibility between silicone and polyamide, and narrow operating window range. The effect of wide operating window, orderly chain structure, and low equipment requirements

Inactive Publication Date: 2014-03-19
ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In order to ensure the smooth realization of phase inversion, it is often necessary to precisely control the dynamic vulcanization conditions such as vulcanization speed and shear strength, and the operating window range is narrow. Separation, phase shape control and stability are more difficult, often need to add special compatibilizer
U.S. Patent US4675372, World Patent WO / 2004 / 072152 and Chinese Patent CN101392063A introduce a method for preparing polyamide-based silicone thermoplastic elastomers by direct copolymerization of functional end-group silicones and polyamide monomers. Such methods can only obtain diembedded block, tri-block and random multi-block copolymers, it is impossible to obtain a finer and ordered alternating multi-block copolymer with a chain structure, which limits the further improvement of product performance

Method used

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  • Polyamide organic silicon thermoplastic elastomer and preparation method thereof
  • Polyamide organic silicon thermoplastic elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] 1) In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100g of octamethylcyclotetrasiloxane, introduce a nitrogen stream to drive off the air and moisture in the system, and add 0.1g of catalyst in turn Tetramethylammonium hydroxide and 5.2g end-capping agent bisaminopropyltetramethyldisiloxane were stirred and reacted at 90°C for 6 hours under nitrogen protection;

[0026] 2) Subsequently, the temperature was raised to 150°C, the catalyst was decomposed and destroyed for 1 hour, and then devolatilized at 135°C and 0.07KPa for 1 hour to obtain an aminopropyl-terminated polydimethylsiloxane with an average molar mass of 5000 g / mol;

[0027] 3) In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100g of caprolactam, introduce a stream of nitrogen to drive off the air and moisture in the system, and add 3g catalyst 6-aminocaproic acid, 3.1g The end-capping agent, adipic acid, was stirred at 150 °C for 0.5 hours un...

Embodiment 2

[0032] 1) In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100g of octamethylcyclotetrasiloxane, introduce a nitrogen stream to drive off the air and moisture in the system, and add 0.1g of catalyst in turn Tetramethylammonium hydroxide, 7.7g end-capping agent bisaminopropyltetramethyldisiloxane;

[0033] 2) The reaction was stirred at 100 °C for 6 hours under nitrogen protection, then heated to 150 °C, decomposed and destroyed the catalyst for 1 hour, and then devolatilized at 135 °C and 0.07KPa for 1 hour to obtain an average molar mass of 3500g / mol. base polydimethylsiloxane;

[0034] 3) In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100g of caprolactam, introduce a nitrogen stream to drive out the air and moisture in the system, and add 3g of catalyst 6-aminocaproic acid, 4.5g of The end-capping agent, adipic acid, was stirred at 160 °C for 0.5 hours under nitrogen protection, then heated to 250 °C and co...

Embodiment 3

[0039] 1） In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100g of octamethylcyclotetrasiloxane, introduce a nitrogen stream to drive out the air and moisture in the system, and add 0.1g of catalyst tetramethyl ammonium hydroxide, 14.0 g of end-capping agent bisaminopropyltetramethyldisiloxane, and stirred for 6 hours at 100°C under nitrogen protection;

[0040] 2) Subsequently, the temperature was raised to 150°C, the catalyst was decomposed and destroyed for 1 hour, and then devolatilized at 135°C and 0.07KPa for 1 hour to obtain an aminopropyl-terminated polydimethylsiloxane with an average molar mass of 2000 g / mol;

[0041] 3) In a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, add 100 g of caprolactam, introduce a nitrogen stream to drive out the air and moisture in the system, and add 3 g of the catalyst 6-aminocaproic acid, 8.6 g of The end-capping agent, adipic acid, was stirred at 160 °C for 0.5 hours under n...

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Abstract

The invention relates to a polyamide organic silicon thermoplastic elastomer and a preparation method thereof. The structural formula of the polyamide organic silicon thermoplastic elastomer is as follows: in the formula, p is 25-65; q is 15-60; n is an integer of 25-50; the elastomer is formed by terminal amino propyl polydimethylsiloxane and terminal carboxyl polyamide-6 by high-temperature polycondensation. The elastomer is high in tensile strength, high in low-temperature impact-resistance strength, good in tear resistance, good in chemical resistance, and good in abrasive resistance, can replace common rubber and soft plastic, and is widely applied to automobiles and general consumer industries.

Description

technical field [0001] The invention relates to a polyamide-based silicone thermoplastic elastomer and a preparation method thereof. Background technique [0002] Silicone thermoplastic elastomer is a kind of polymer material that has both the superior performance of silicone elastomer and the thermoplasticity of thermoplastics. Due to their thermoplastic properties, silicone thermoplastic elastomers are reproducible and have great advantages over chemically cross-linked traditional silicone elastomers in terms of resource utilization and environmental protection. [0003] At present, the preparation methods of polyamide-based silicone thermoplastic elastomers mainly include dynamic vulcanization of silicone in the presence of polyamide, and direct copolymerization of silicone with functional end groups and polyamide monomers. U.S. Patent US6743868B2 and Chinese Patent CN1429253A introduce the method for preparing polyamide-based silicone thermoplastic elastomer by dynamic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G77/26C08G69/16C08L87/00
Inventor 刘赫杨朱春凤俞远志
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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