Title:
SHEAR DEGRADATION INHIBITOR FOR TRIBLOCK THERMOPLASTIC ELASTOMERS
Document Type and Number:
WIPO Patent Application WO2004052940
Kind Code:
A3
Abstract:
Thermoplastic elastomers, such as styrene-poly(ethylene-propylene)-styrene (SEPS) and styrene-poly(ethylene-butylene)-styrene (SEBS), have a tendency to undergo homolytic cleavage on mixing, particularly when extended mixing times are employed. Such thermoplastic elastomers are protected by addition of a polymer with multiple reactive sites, such as polybutadiene. The polymer reacts with two or more of the cleaved fragments forming a copolymer which regains much of the original character of the thermoplastic elastomer.
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Inventors:
HALL JAMES (US)
Application Number:
PCT/US2003/039000
Publication Date:
September 16, 2004
Filing Date:
December 09, 2003
Export Citation:
Assignee:
BRIDGESTONE CORP (JP)
HALL JAMES (US)
HALL JAMES (US)
International Classes:
C08F2/00; C08F8/00; C08G81/02; (IPC1-7): C08F8/00; C08G81/02
Foreign References:
| EP0611787A1 | 1994-08-24 | |||
| US5037895A | 1991-08-06 | |||
| US5304599A | 1994-04-19 |
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