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A kind of high gas barrier thermoplastic vulcanizate and preparation method thereof

A thermoplastic vulcanizate and gas barrier technology, applied in the field of polymer materials, can solve the problems of high hardness of thermoplastic vulcanizate, and achieve the effects of enhanced bonding, harsh operating environment, and large solvent loss

Active Publication Date: 2020-05-22
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this patent does not significantly improve the problem of poor compatibility of butyl polyamide, and the prepared thermoplastic vulcanizate has the problem of high hardness
Patent CN105255026A discloses a reactive compatibilization preparation of butyl rubber / polyamide thermoplastic vulcanizate and its preparation method, which uses butyl rubber grafted and modified by a bifunctional compound as a compatibilizer, and the obtained thermoplastic vulcanizate dispersed phase particles Although the diameter is significantly reduced, the particle size of the rubber dispersed phase is still in the micron level, and the phase structure needs to be further optimized

Method used

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  • A kind of high gas barrier thermoplastic vulcanizate and preparation method thereof
  • A kind of high gas barrier thermoplastic vulcanizate and preparation method thereof
  • A kind of high gas barrier thermoplastic vulcanizate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The basic composition and mass parts of the selected raw materials are as follows:

[0037]

[0038] Wherein the basic composition and mass fraction of the compatibilizer are as follows:

[0039]

[0040] According to the above formula, polyisobutylene, glycidyl methacrylate, styrene and dicumyl peroxide were put into a Rheocord Haake type batch mixer at room temperature, and pre-mixed for 15 minutes until the mixture was uniform, and then the mixture Put it into a mixing chamber preheated to the required temperature (set to 150°C), and mix for 12 minutes to obtain a low-molecular-weight polyisobutylene blend modified by glycidyl methacrylate; then add the compatibilizer and poly The amide was blended and grafted in an internal mixer at 200°C for 5 minutes, and the obtained product was dried and then mixed with bromobutyl rubber at 200°C, and an antioxidant was added, and the material was cooled to room temperature after mixing evenly; Mix uniformly with a vulcan...

Embodiment 2

[0044] The basic composition and mass parts of the selected raw materials are as follows:

[0045]

[0046] Wherein the basic composition and mass fraction of the compatibilizer are as follows:

[0047]

[0048] According to the above formula, at room temperature, put medium molecular weight polyisobutylene, glycidyl methacrylate, acrylonitrile and di-tert-butyl peroxide into a Rheocord Haake type batch mixer, pre-mix for 12 minutes until the mixture is uniform, then Put the mixture into a mixing chamber preheated to the required temperature (set to 170° C.) and mix for 15 minutes to obtain a medium molecular weight polyisobutylene blend modified by glycidyl methacrylate; then add the compatibilizer Blending and grafting with polyamide 66 in an internal mixer at 200°C for 8 minutes, after drying the obtained product, mix it with brominated polyisobutylene-p-methylstyrene rubber at 190°C, add antioxidant, and mix evenly After discharging, the material is cooled to room t...

Embodiment 3

[0052] The basic composition and mass parts of the selected raw materials are as follows:

[0053]

[0054]

[0055] Wherein the basic composition and mass fraction of the compatibilizer are as follows:

[0056]

[0057] According to the above recipe, put low molecular weight polyisobutylene, glycidyl methacrylate, acrylic acid and dibutyl azobisisobutyrate into a Rheocord Haake type batch mixer at room temperature, and pre-mix for 18 minutes until the mixture is uniform , and then put the mixture into a mixing chamber preheated to the required temperature (set to 160°C) and mix for 15 minutes to obtain a low molecular weight polyisobutylene blend modified by glycidyl methacrylate; The compatibilizer and polyamide 12 were blended and grafted in an internal mixer at 200°C for 8 minutes, and the obtained product was dried and then mixed with chlorinated butyl rubber at 210°C, and an antioxidant was added. After mixing evenly, the material was discharged and cooled to r...

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Abstract

The invention relates to a thermoplastic vulcanized rubber with high air barrier properties and a preparation method thereof. The thermoplastic vulcanized rubber with the high air barrier properties is mainly composed of raw materials including, halogenated butyl rubber, polyamide or EVOH (ethylene vinyl alcohol copolymer), bulking agent, vulcanizing agent and antioxidant, wherein the bulking agent is a glycidyl methacrylate grafted polyisobutene copolymer prepared from polyisobutene, glycidyl methacrylate, comonomers and initiator. The thermoplastic vulcanized rubber with the high air barrierproperties and containing polyamide or EVOH is prepared from a rubber-plastics premixture of polyamide or EVOH blended and grafted with the bulking agent and the halogenated butyl rubber, has a finemicro phase structure and is excellent in physical and mechanical property, air tightness, hardness and the like.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a high gas barrier thermoplastic vulcanizate and a preparation method thereof. Background technique [0002] Thermoplastic vulcanizate is a special thermoplastic elastomer obtained by dynamic vulcanization reaction processing technology. When a small amount of plastic phase is melt-blended with a large amount of rubber, the rubber is chemically cross-linked under the action of the cross-linking agent, and the viscosity increases, so it is broken into micron-sized rubber particles under the action of strong mechanical shear, and finally forms the following Rubber is the dispersed phase and plastic is the special phase structure of the continuous phase. This special structure makes thermoplastic vulcanizate not only have the high elasticity and softness of traditional rubber, but also have the properties of thermoplastic processing and recyclability of plastics. [0003] The thermo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/28C08L51/06C08L77/02C08L77/06C08L77/00C08L29/04C08K3/22C08F255/10C08F220/32
CPCC08F255/10C08K2003/2296C08L23/283C08L2201/14C08L2205/03C08L2205/08C08L77/02C08L51/06C08K3/22C08L77/06C08L77/00C08L29/04C08F220/325
Inventor 宁南英张文乾田明张立群李尚清
Owner BEIJING UNIV OF CHEM TECH
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