Thermoplastic elastomers exhibiting superior barrier properties

Inactive Publication Date: 2011-02-03
POLYONE CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But butyl rubber is not capable of being injection molded.
But often, TPEs lack gas barrier properties comparable to butyl rubber.

Method used

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Examples

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examples

[0034]Table 2 shows two examples of the present invention, in comparison with a control (Comparative Example A) and four comparison examples (Comparative Examples B-E) representing a TPE-S with either amorphous or crystalline nylon which does not contain organoclay.

[0035]All formulations of Examples 1-2 and Comparative Examples A-E had the same SIBS TPE-S matrix. All formulations of Examples 1-2 and Comparative Examples B-E had the same SIBS TPE-S matrix and antioxidant. Comparative Examples B and D offered a direct comparison with Example 1, while Comparative Examples C and E offered a direct comparison with Example 2. Only the type of polyamide was different.

[0036]All of Examples 1-2 and B-E were made using a twin-screw extruder set at 238° C. in all zones, rotating at 500 rpm. All ingredients were added before Zone 1. The melt-mixed compound was pelletized for further handling.

[0037]Pellets of all Examples 1-2 and A-E were molded into tensile test bars using a Demag injection mol...

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Abstract

A blend of styrene-isobutylene-styrene based thermoplastic elastomer and organoclay-filled polyamide is disclosed which has good processability and more effective barrier properties for oxygen than the blend using amorphous or crystalline polyamide without organoclay.

Description

CLAIM OF PRIORITY[0001]This application claims priority from U.S. Provisional Patent Application Ser. No. 61 / 047,047 bearing Attorney Docket Number 12008012 and filed on Apr. 22, 2008, which is incorporated by reference.FIELD OF THE INVENTION[0002]This invention relates to thermoplastic elastomers containing organoclay-filled polyamide to provide barrier properties.BACKGROUND OF THE INVENTION[0003]The world of polymers has progressed rapidly to transform material science from wood and metals of the 19th Century to the use of thermoset polymers of the mid-20th Century to the use of thermoplastic polymers of later 20th Century.[0004]An example of a popular rubber is butyl rubber which has excellent gas barrier properties. But butyl rubber is not capable of being injection molded.[0005]Thermoplastic elastomers (TPEs) combine the benefits of elastomeric properties of thermoset polymers, such as vulcanized rubber, with the processing properties of thermoplastic polymers. Therefore, TPEs ...

Claims

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Application Information

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IPC IPC(8): C08K5/5415
CPCB82Y30/00C08J3/226C08J5/005C08J2353/00C08J2477/00C08K3/0033C08K3/346C08L23/22C08L53/00C08L77/00C08K5/0016C08L25/08C08L2666/20C08L2666/06C08L2666/24C08K3/013
Inventor QIAN, GUOQIANGXU, LIANGVENKATASWAMY, KRISHNA
Owner POLYONE CORPORATION
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