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Thermoplastic vulcanizate having high gas barrier property and preparation method of thermoplastic vulcanizate

A thermoplastic vulcanizate and gas barrier technology, applied in the field of polymer materials, can solve the problems of manpower and material resources consumption, environmental pollution, and unsatisfactory expansion effect, and achieve the effect of reducing degradation and good stabilization effect

Active Publication Date: 2014-05-14
BEIJING UNIV OF CHEM TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it has the following problems: 1. CIIR will pollute the environment, and the future butyl rubber market will be dominated by brominated butyl rubber (BIIR); 2. The sulfur vulcanization system has the problem of easy reversion, which is not conducive to thermoplastic vulcanization Repeated processing and use of glue
Patent CN102964702A discloses a preparation method of thermoplastic vulcanizate with high gas barrier performance. The rubber used is BIIR, and the nylon is ternary copolymerized nylon. They are hot-mixed in an internal mixer, and chlorinated polyethylene (CPE), (Maleic anhydride grafted polyethylene octene copolymer) POE-g-MAH is used as a compatibilizer, but the compatibilization effect is not ideal. Although a thermoplastic vulcanizate with a relatively low hardness is obtained after dynamic vulcanization, the rubber phase The dispersed particle size is very large, and this patent does not give specific gas barrier performance data
Patent CN103030895A discloses a thermoplastic vulcanizate with high gas barrier performance and its preparation method. The rubber used is CIIR, and nylon is nylon 12. Self-made premix"), dynamic vulcanization in twin-screw to obtain thermoplastic vulcanizate with excellent mechanical properties and gas barrier properties, but the preparation process of self-made compatibilizer is cumbersome and consumes manpower and material resources, which is not conducive to industrial production

Method used

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  • Thermoplastic vulcanizate having high gas barrier property and preparation method of thermoplastic vulcanizate
  • Thermoplastic vulcanizate having high gas barrier property and preparation method of thermoplastic vulcanizate
  • Thermoplastic vulcanizate having high gas barrier property and preparation method of thermoplastic vulcanizate

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Embodiment 1: (the parts described in the embodiment are parts by mass)

[0029] Nylon 12 (melt index 230°C 2.16kg, 3.5g / 10min) was dried at 120°C for 5 hours, nylon 12 (54 parts) and compatibilizer polyisobutylene succinic anhydride PIBSA (10 parts) were melted at 185°C Grafting for 10 minutes; Add the stabilization system (epoxidized soybean oil: calcium stearate: antioxidant 1010=2:2:1) (5 parts) to BIIR (Mooney viscosity ML (1+8) 125°C: 32 ) (100 parts), the mixture of BIIR and stabilizer, the grafted blend, and antioxidant 1010 (1 part), were mixed uniformly in an internal mixer at 185°C. The temperature was lowered to room temperature, and zinc oxide (2 parts), vulcanization aid HVA-2 (4 parts), stearic acid (1.2 parts) and paraffin oil (15 parts) were added to the above mixture.

[0030] Dynamic crosslinking was performed in a twin-screw extruder (HTS-40, Nanjing Rubber and Plastic Machinery Factory). Set the temperature of each section of screw / head to 185 185...

Embodiment 2

[0032] Polypropylene grafted with maleic anhydride PP-g-MAH was used as a compatibilizer, and other preparation processes were the same as in Example 1.

Embodiment 3

[0039] Nylon 12 (same as Example 1) was dried at 120°C for 5 hours, nylon 12 (43 parts) and PIBSA compatibilizer (5 parts) were melt grafted at 190°C for 7.5min; the stabilizer (epoxidized soybean oil : calcium stearate: antioxidant 1010=3:2.5:1.5) (7 parts) joins in BIIR (with embodiment 1) (100 parts), weighs the mixture and graft blend of BIIR and stabilizing agent 1. Antioxidant 1010 (1.5 parts), mixed uniformly in an internal mixer at 190°C. The temperature was lowered to room temperature, and zinc oxide (3 parts), vulcanization aid HVA-2 (3 parts), stearic acid (1.5 parts) and paraffin oil (20 parts) were added to the above mixture.

[0040] Dynamic cross-linking was carried out in the twin-screw extruder described in Example 1, and the temperature of each section of the screw / head was set to 185 185 185 185 185 185 185 185 185 185 185 185 / 185, and the twin-screw speed was 480 rpm. After completing the dynamic cross-linking, add N-BBSA to adjust the hardness and measure...

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PUM

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Abstract

The invention relates to a thermoplastic vulcanizate having high gas barrier property and a preparation method of the thermoplastic vulcanizate, and belongs to the technical field of high molecular materials. The thermoplastic vulcanizate is prepared by dynamically vulcanizing a rubber-plastic mixture which is composed of nylon blended and grafted with a compatibilizer previously and butyl rubber; the interfacial compatibility between the nylon and the rubber is enhanced, and the thermoplastic vulcanizate is enabled to meet the requirements of a tyre airtight liner material in gas barrier property, mechanical properties, quality, hardness and the like.

Description

technical field [0001] The invention relates to a thermoplastic vulcanizate with high gas barrier performance and a preparation method thereof, belonging to the technical field of polymer materials. Background technique [0002] Thermoplastic elastomer is a type of elastomer that has the elasticity of rubber at room temperature and can be plasticized at high temperature. Thermoplastic vulcanizate is a kind of thermoplastic elastomer, which is a kind of material obtained by dynamic full vulcanization through rubber and plastic blending. Under the high-speed shear stress of the mixing machine, the phase inversion of the blending system occurs, and the vulcanized rubber is dispersed in the plastic phase as the continuous phase in the form of particles. [0003] Both butyl rubber and nylon are materials with excellent airtightness. The thermoplastic vulcanizate obtained by mixing the two through dynamic vulcanization has good physical properties and excellent airtightness, and ...

Claims

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Application Information

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IPC IPC(8): C08L23/28C08L77/02C08K13/02C08K5/134C08K5/1515C08K5/098C08K3/22C08K5/09C08K5/435C08K5/01C08G69/48B29C47/92B29C35/02B29C48/92
CPCB29C35/02B29C48/92B29C2948/9258B29C2948/92704C08L23/28C08L2201/14C08L2205/035C08L2205/08C08L77/02C08L91/00C08K13/02C08K5/1515C08K5/098C08K2003/2296C08K5/09C08K5/435B29C48/40B29C48/875B29C2948/9259B29C2948/92885
Inventor 田明胡麟甲张立群田洪池韩吉彬其他发明人请求不公开姓名
Owner BEIJING UNIV OF CHEM TECH
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