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Polyamide-based silicone 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, low equipment requirements, and orderly chain structure

Inactive Publication Date: 2016-04-13
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-based silicone thermoplastic elastomer and preparation method thereof
  • Polyamide-based silicone thermoplastic elastomer and preparation method thereof
  • Polyamide-based silicone thermoplastic elastomer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

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

[0026] 2) Then heat up to 150°C, decompose and destroy the catalyst for 1 hour, and then devolatilize at 135°C and 0.07KPa for 1 hour to obtain aminopropyl-terminated polydimethylsiloxane with an average molar mass of 5000g / mol;

[0027] 3) Add 100g of caprolactam into the reactor equipped with a stirrer, reflux condenser and nitrogen pipe, pass through nitrogen flow to drive out the air and moisture in the system, add 3g of catalysts 6-aminocaproic acid, 3.1g End-capping agent adipic acid, stirred and reacted at 150°C for 0.5 hours under the protection of nitrogen, then raised t...

Embodiment 2

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

[0033] 2) Stir and react at 100°C for 6 hours under the protection of nitrogen, then raise the temperature to 150°C, decompose and destroy the catalyst for 1 hour, and then devolatilize at 135°C and 0.07KPa for 1 hour to obtain teramide with an average molar mass of 3500g / mol base polydimethylsiloxane;

[0034] 3) Add 100g of caprolactam into a reactor equipped with a stirrer, reflux condenser and nitrogen pipe, pass through nitrogen flow to drive out the air and moisture in the system, add 3g of catalysts 6-aminocaproic acid, 4.5g End-capping agent adipic acid, stirred and reacted at 160°C for 0.5 hours under the protection of nitrogen, then r...

Embodiment 3

[0039]1) Add 100g of octamethylcyclotetrasiloxane to a reactor equipped with a stirrer, a reflux condenser and a nitrogen pipe, pass through a nitrogen flow to drive out the air and moisture in the system, and then add 0.1g of catalyst in turn Tetramethylammonium hydroxide, 14.0g end-capping agent bisaminopropyltetramethyldisiloxane, stirred and reacted at 100°C for 6 hours under nitrogen protection;

[0040] 2) Then heat up to 150°C, decompose and destroy the catalyst for 1 hour, and then devolatilize at 135°C and 0.07KPa for 1 hour to obtain aminopropyl-terminated polydimethylsiloxane with an average molar mass of 2000g / mol;

[0041] 3) Add 100g of caprolactam into the reactor equipped with a stirrer, reflux condenser and nitrogen pipe, pass through the nitrogen flow to drive out the air and moisture in the system, add 3g of catalysts 6-aminocaproic acid, 8.6g End-capping agent adipic acid, stirred and reacted at 160°C for 0.5 hours under the protection of nitrogen, then rai...

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Abstract

The invention relates to a polyamide-based silicone thermoplastic elastomer and a preparation method thereof. The structural formula of the polyamide-based silicone thermoplastic elastomer is as follows: in the formula, p is 25-65, q is 15-60, and n is 25-50 Integer, the elastomer is formed by polycondensation of aminopropyl-terminated polydimethylsiloxane and carboxyl-terminated polyamide-6 at high temperature. The elastomer has high tensile strength and low-temperature impact strength, good tear resistance, and It has good chemical properties and good wear resistance. It can replace ordinary rubber and soft plastics and is widely used in 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 Patents(China)
IPC IPC(8): C08G81/00C08G77/26C08G69/16C08L87/00
Inventor 刘赫扬朱春凤俞远志
Owner ZHEJIANG UNIVERSITY OF SCIENCE AND TECHNOLOGY
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