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Thermoplastic elastomers moldable under low shear conditions

A thermoplastic elastomer, plasticizer technology, applied in the direction of coating, can solve the problem of increasing the cost of rotomolding or slush molding TPE process

Inactive Publication Date: 2014-02-05
POLYONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is well known that the low-temperature crushing process will significantly increase the cost of preparing rotational or slush TPE processes

Method used

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  • Thermoplastic elastomers moldable under low shear conditions
  • Thermoplastic elastomers moldable under low shear conditions
  • Thermoplastic elastomers moldable under low shear conditions

Examples

Experimental program
Comparison scheme
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Embodiment

[0045] Table 3 shows the ingredients of Comparative Examples A-F and Examples 1-10. Tables 4-6 show the experimental formulations and results of Comparative Examples A-C, Examples 1-7, Comparative Examples D-F and Examples 8-10.

[0046] In the Examples and Comparative Examples, a co-rotating twin-screw extruder was used to mix and compound the TPE formulations. Then, the TPE formulation was pelletized underwater using a Gala underwater pelletizer system.

[0047] The die hole size is usually 2.4-2.8 mm, and the obtained particles average 30-80 particles / g. A separating agent, such as talc, polyolefin wax, metal stearate, silica or other mineral fillers, is sprinkled on the granules to keep them unbonded for storage until ready to use.

[0048] All Examples 1-10 and Comparative Examples A-F were prepared with a twin-screw extruder whose parameters were set as follows: Zone 1-3, 149-193°C; Zone 4-7, 171-204°C; Zone 8-10 , 160-204°C; speed, 250-400rpm. All ingredients are ad...

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Abstract

A thermoplastic elastomer compound of an acrylic-containing styrenic block copolymer and plasticizer oil have been found to be capable of sintering at a temperature ranging from about 180 DEG C to about 200 DEG C when the copolymer and the oil are in no more than a 2:1 weight ratio. The compound can be used in rotomolding or slush-molding equipment to make plastic articles having elastomeric properties.

Description

[0001] priority claim [0002] This application claims priority to US Provisional Patent Application Registration No. 61 / 489,814 (Attorney Docket No. 12011009), filed May 25, 2011, which is hereby incorporated by reference. field of invention [0003] This invention relates to thermoplastic elastomers which can be rotomolded or slush-molded into thermoplastic elastomer articles. Background of the invention [0004] The field of polymers has grown tremendously, transforming materials science from wood and metals in the 19th century to the use of thermoset polymers in the mid-20th century to thermoplastic polymers in the late 20th century. [0005] Thermoplastic elastomers (TPEs) combine the elastic properties of thermoset polymers, such as vulcanized rubber, with the benefits of processing characteristics of thermoplastic polymers. Therefore, TPEs are the first choice because they can be made into articles by injection molding equipment. [0006] Typically, homopolymers or ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/00C08L25/14C08L23/00C08J5/00
CPCB29C41/04C08L53/00C08L23/00C08L25/14C08L2205/02C08J5/00C08L91/00C08L23/12C08L53/025
Inventor G·迈耶W·佩佩
Owner POLYONE CORP