EP0224389A2
Expired / Lapsed
EP
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Styrene-diene block copolymer compositions
Assignee: Raychem Corp
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Filing: 1986-11-21
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Granted: —
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Expires: 2006-11-21
Abstract
Abstract The invention provides a composition comprising about 2 to about 30 parts by weight of a mixture of poly(styrene-ethylene-butylene-styrene) triblock copolymers; and about 70 to about 98 parts by weight of a hydrocarbon oil; and wherein the mixture of triblock copolymers comprises (a) a triblock copolymer having a styrene to ethylene-butylene ratio of 14 to 30 styrene blocks to 70 to 86 ethylene-bulylene blocks; and (b) ethylene-butylene ratio of 31 to 35 styrene blocks to 65 to 69 ethylene-butylene blocks; and wherein the ratio of copolymer (a) to copolymer (b) is from about 15:85 to about 85:15. <??>The compositions of the invention are particularly useful as sealing materials.
Inventors
- 👤 Jose P. Gamarra
- 👤 C. John Swinmurn
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 20:01
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08L53/025
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
101 words
A composition comprising: about 2 to about 30 parts by weight of a mixture of poly(styrene-ethylene-butylene-styrene) triblock copolymers; and about 70 to about 98 parts by weight of a hydrocarbon oil; and wherein the mixture of triblock copolymers comprises: (a) a triblock copolymer having a styrene to ethylene-butylene ratio of 14 to 30 styrene blocks to 70 to 86 ethylene-butylene blocks; and (b) a triblock copolymer having a styrene to ethylene-butylene ratio of 31 to 35 styrene blocks to 65 to 69 ethylene-butylene blocks; and wherein the ratio of copolymer (a) to copolymer (b) is from about 15:85 to about 85:15.
Claim 2
Dependent Claim
101 words
A composition comprising: about 2 to about 30 parts by weight of a mixture of poly(styrene-ethylene-butylene-styrene) triblock copolymers; and about 70 to about 98 parts by weight of a hydrocarbon oil; and wherein the mixture of triblock copolymers comprises: (a) a triblock copolymer having a styrene to ethylene-butylene ratio of 14 to 30 styrene blocks to 70 to 86 ethylene-butylene blocks; and (b) a triblock copolymer having a styrene to ethylene-butylene ratio of 31 to 35 styrene blocks to 65 to 69 ethylene-butylene blocks; and wherein the ratio of copolymer (a) to copolymer (b) is from about 15:85 to about 85:15.
Claim 3
Dependent Claim
16 words
A composition according to claim 1, wherein the ratio is from about 40:60 to about 60:40.
Claim 4
Dependent Claim
44 words
A composition according to claim 2, wherein triblock copolymer (a) has a ratio of 20 to 29 styrene blocks to 71 to 80 ethylene-butylene blocks and triblock copolymer (b) has a ratio of 32 to 34 styrene blocks to 66 to 68 ehtylene-butylene blocks.
Claim 5
Dependent Claim
70 words
A 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 6
Dependent Claim
70 words
A 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 7
Dependent Claim
18 words
A composition according to claim 4, wherein the styrene-diene block copolymer comprises a SEBS, SBS, or SIS copolymer.
Claim 8
Dependent Claim
29 words
A composition according to claim 4 or claim 5, wherein the composition is cross-linked with electron beam radiation with a beam dose of about 1 to about 30 megarads.
Claim 9
Dependent Claim
18 words
A composition according to any one of claims 4, 5 and 6, wherein the coupling agent is TMPTM.
Claim 10
Dependent Claim
33 words
A composition according to any one of claims 1, 4, 5, 6 and 7, comprising about 10 to about 25 parts styrene-diene block copolymer and about 75 to about 90 parts hydrocarbon oil.
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.
Claim 13
Dependent Claim
32 words
A method according to claim 9, wherein the styrene-diene copolymer comprises about 10 to about 25 parts by weight and the hydrocarbon oil comprises about 75 to about 90 parts by weight.
References Cited (Backward Citations)
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