Patent US6150464A successfully refreshed from Google Patents.
US6150464A
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US
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Preferred process for silicon hydride addition and preferred degree of polymerization for silicon hydride for thermoplastic vulcanizates
Assignee: ExxonMobil Chemical Co
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Filing: 1998-11-30
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Granted: 2000-11-21
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Expires: 2018-11-30
Abstract
Abstract An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking, in which a hydrosilylation crosslinking agent with a low degree of polymerization and/or a hydrosilylation crosslinking agent diluted in oil is used.
Inventors
- 👤 Robert E. Medsker
- 👤 Jianqun Zhao
- 👤 Gary W. Gilbertson
- 👤 Kuo-Shein Shen
- 👤 Donald Wang
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:32
CPC Classifications
C; C08; C08L; C08L101/00; C08L23/00; C08L23/02; C08L23/10; C08J; C08J3/00; C08J3/005; C08K; C08K5/00; C08K5/54; C08L21/00; C08L23/16; C08L23/18; C08L23/20; C08L23/22; C08J2321/00; C08L23/12
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
96 words
A thermoplastic vulcanizate comprising, a) a thermoplastic resin blended with a crosslinked rubber, b) optionally fillers, extender oils, and plasticizers, c) wherein said crosslinked rubber comprises crosslinks which are the reaction product of a hydrosilylation crosslinking agent having a degree of polymerization of about 2 to about 20 reacted with residual unsaturated carbon to carbon double bonds in said rubber in the presence of a hydrosilylation catalyst, and wherein the crosslinking agent has been introduced into said vulcanizate in the form of an about 20 to about 80 weight percent solution of said agent in oil.
Claim 2
Dependent Claim
96 words
A thermoplastic vulcanizate comprising, a) a thermoplastic resin blended with a crosslinked rubber, b) optionally fillers, extender oils, and plasticizers, c) wherein said crosslinked rubber comprises crosslinks which are the reaction product of a hydrosilylation crosslinking agent having a degree of polymerization of about 2 to about 20 reacted with residual unsaturated carbon to carbon double bonds in said rubber in the presence of a hydrosilylation catalyst, and wherein the crosslinking agent has been introduced into said vulcanizate in the form of an about 20 to about 80 weight percent solution of said agent in oil.
Claim 3
Dependent Claim
14 words
A thermoplastic vulcanizate according to claim 1, wherein said rubber comprises an EPDM rubber.
Claim 4
Dependent Claim
23 words
A thermoplastic vulcanizate according to claim 1, wherein said hydrosilylation crosslinking agent has a degree of polymerization from about 3 to about 15.
Claim 5
Dependent Claim
21 words
A thermoplastic vulcanizate according to claim 1, wherein said rubber has residual carbon to carbon double bonds which are sterically unhindered.
Claim 6
Dependent Claim
25 words
A thermoplastic vulcanizate according to claim 1, wherein said rubber comprises a copolymer containing at least repeating units from isobutylene and an aromatic divinyl compound.
Claim 7
Dependent Claim
22 words
A thermoplastic vulcanizate according to claim 1, wherein said rubber comprises an acrylic or alkacrylic functionalized copolymer from copolymerizing isobutylene and para-methylstyrene.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-11-21 | 2004-05-22 | 2004-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-11-21 | 2008-05-22 | 2008-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-11-21 | 2012-05-22 | 2012-11-21 | $7700.00 | Window Closed / Lapsed |