Patent US4405435A successfully refreshed from Google Patents.
US4716183A
Expired / Lapsed
US
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Styrene-diene block copolymer compositions
Assignee: Raychem Corp
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Filing: 1985-11-22
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Granted: 1987-12-29
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Expires: 2005-11-22
Abstract
Abstract This invention comprises to styrene-diene block copolymer-oil-coupling agent compositions which are radiation cross-linked. In another aspect this invention relates to similar composition wherein the styrene-diene block copolymer is a blend of two different poly(styrene-ethylenebutylene-styrene) triblock copolymers, which composition may also be radiation cross-linked.
Inventors
- 👤 Jose P. Gamarra
- 👤 C. John Swinmurn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:11
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A crosslinked composition comprising: about 2 to about 30 parts by weight of a styrene-diene block copolymer; about 70 to about 98 parts by weight hydrocarbon oil; and about 0.5 to about 25% by weight based on the weight of the copolymer and oil of a multifunctional coupling agent; and wherein the copolymer-oil-coupling agent composition is cross-linked with electron beam radiation or with UV radiation in the presence of a photoinitiator.
Claim 2
Dependent Claim
71 words
A crosslinked composition comprising: about 2 to about 30 parts by weight of a styrene-diene block copolymer; about 70 to about 98 parts by weight hydrocarbon oil; and about 0.5 to about 25% by weight based on the weight of the copolymer and oil of a multifunctional coupling agent; and wherein the copolymer-oil-coupling agent composition is cross-linked with electron beam radiation or with UV radiation in the presence of a photoinitiator.
Claim 3
Dependent Claim
18 words
A composition according to claim 1, wherein the styrene-diene block copolymer comprises a SEBS, SBS, or SIS copolymer.
Claim 4
Dependent Claim
16 words
A composition according to claim 2, wherein the styrene-diene block copolymer comprises SEBS or SBS copolymer.
Claim 5
Dependent Claim
26 words
A composition according to claim 1, wherein the composition is cross-linked with electron beam radiation with a beam dose of about 1 to about 30 megarads.
Claim 6
Dependent Claim
26 words
A composition according to claim 3, wherein the composition is cross-linked with electron beam radiation with a beam dose of about 1 to about 30 megarads.
Claim 7
Dependent Claim
12 words
A composition according to claim 1, wherein the coupling agent is TMPTM.
Claim 8
Dependent Claim
12 words
A composition according to claim 5, wherein the coupling agent is TMPTM.
Claim 9
Dependent Claim
38 words
A composition according to claim 1, wherein the copolymer is a blend of a SEBS triblock copolymer having a styrene to ethylene-butylene ratio of 28:72 and a SEBS triblock copolymer having a styrene to ethylene-butylene ratio of 33:67.
Claim 10
Dependent Claim
38 words
A composition according to claim 6, wherein the copolymer is a blend of a SEBS triblock copolymer having a styrene to ethylene-butylene ratio of 28:72 and a SEBS triblock copolymer having a styrene to ethylene-butylene ratio of 33:67.
Claim 11
Independent Claim
97 words
A method of preparing a radiation cross-linked elastomeric composition comprising: mixing about 2 to about 30 parts by weight of a styrene-diene block copolymer, about 70 to about 98 parts by weight hydrocarbon oil and about 0.5 to about 25% by weight of a multifunctional coupling agent based on the combined weight of the copolymer and oil under shear and elevated temperature which are sufficient to cause the block copolymer to melt and disperse in the hydrocarbon oil; and cross-linking the resultant composition with electron beam radiation or with UV radiation in the presence of a photoinitiator.
Claim 12
Independent Claim
97 words
A method of preparing a radiation cross-linked elastomeric composition comprising: mixing about 2 to about 30 parts by weight of a styrene-diene block copolymer, about 70 to about 98 parts by weight hydrocarbon oil and about 0.5 to about 25% by weight of a multifunctional coupling agent based on the combined weight of the copolymer and oil under shear and elevated temperature which are sufficient to cause the block copolymer to melt and disperse in the hydrocarbon oil; and cross-linking the resultant composition with electron beam radiation or with UV radiation in the presence of a photoinitiator.
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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) | 1990-12-28 | 1991-06-29 | 1991-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-12-28 | 1995-06-29 | 1995-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-12-28 | 1999-06-29 | 1999-12-29 | $7700.00 | Window Closed / Lapsed |