EP0299718A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Heat-resistant gel compositions
Assignee: Raychem Corp
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Filing: 1988-07-12
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Granted: —
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Expires: 2008-07-12
Abstract
Abstract This invention provides styrene-ethylene-butylene-styrene triblock copolymer-oil compositions which are temperature resistant and nonmeltable. They have a viscosity at 200°C of at least 200 poise. The compositions can be molded under pressure at elevated temperatures.
Inventors
- 👤 Jose Pereyra Jose Gamarra
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 18:01
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/01
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
117 words
A composition comprising: about 2 to about 30 parts by weight of a poly(styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been (a) melt blended and (b) at sufficiently high temperature or under sufficiently high shear have been treated to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 10 poise.
Claim 2
Dependent Claim
117 words
A composition comprising: about 2 to about 30 parts by weight of a poly(styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been (a) melt blended and (b) at sufficiently high temperature or under sufficiently high shear have been treated to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 10 poise.
Claim 3
Dependent Claim
16 words
A composition according to claim 1, wherein the viscosity at 200°C is at least 100 poise.
Claim 4
Dependent Claim
16 words
A composition according to claim 1, wherein the viscosity at 200°C is at least 400 poise.
Claim 5
Dependent Claim
16 words
A composition according to claim 1, wherein the viscosity at 200°C is at least 500 poise.
Claim 6
Dependent Claim
20 words
A composition according to claim 1, wherein the molecular weight of the triblock copolymer is about 150,000 to about 300,000.
Claim 7
Dependent Claim
20 words
A composition according to claim 5, wherein the molecular weight of the triblock copolymer is about 200,000 to about 290,000.
Claim 8
Dependent Claim
23 words
A composition according to claim 1, wherein the plasticizer comprises a hydrocarbon oil having a molecular weight of about 400 to about 2500.
Claim 9
Dependent Claim
23 words
A composition according to claim 1, wherein the plasticizer comprises a hydrocarbon oil having a solubility parameter of about 6.0 to about 8.5.
Claim 10
Independent Claim
143 words
A method of preparing a composition comprising: about 2 to about 30 parts by weight of a poly (styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been melt blended or a mixture thereof has been moulded or extruded at sufficiently high temperature to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 10 poise; which comprises melt blending the triblock copolymer and the plasticizer or moulding or extruding a mixture thereof at a temperature above about 180°C.
Claim 11
Independent Claim
143 words
A method of preparing a composition comprising: about 2 to about 30 parts by weight of a poly (styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been melt blended or a mixture thereof has been moulded or extruded at sufficiently high temperature to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 10 poise; which comprises melt blending the triblock copolymer and the plasticizer or moulding or extruding a mixture thereof at a temperature above about 180°C.
Claim 12
Dependent Claim
18 words
A method according to claim 5, wherein the melt blending is carried out at a temperature above 190°C.
Claim 13
Dependent Claim
19 words
A method according to claim 5, wherein the melt blending is carried out at a temperature above about 200°C.
Claim 14
Independent Claim
146 words
A method of preparing a composition comprising: about 2 to about 30 parts by weight of a poly (styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been melt blended or a mixture thereof has been moulded or extruded under sufficiently high shear to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 200 poise; which comprise high shear blending the triblock copolymer and the plasticizer or high shear moulding or extruding a mixture thereof at a temperature above about 100°C.
Claim 15
Independent Claim
146 words
A method of preparing a composition comprising: about 2 to about 30 parts by weight of a poly (styrene-ethylene-butylene-styrene) triblock copolymer having a styrene to ethylene-butylene block ratio of about 27 to 35 styrene blocks to about 65 to 73 ethylene-butylene blocks, and having a molecular weight of at least 100,000; and about 70 to about 98 parts by weight of a plasticizer; wherein the triblock copolymer and the plasticizer have been melt blended or a mixture thereof has been moulded or extruded under sufficiently high shear to cause the composition to have a cone penetration of at least about 50 (10⁻¹mm), an ultimate elongation of at least about 200% and a viscosity at 200°C of at least 200 poise; which comprise high shear blending the triblock copolymer and the plasticizer or high shear moulding or extruding a mixture thereof at a temperature above about 100°C.
Claim 16
Dependent Claim
18 words
A method according to claim 8, wherein the blending is carried out at a temperature above about 110°C.
Claim 17
Dependent Claim
18 words
A method according to claim 8, wherein the blending is carried out at a temperature above about 120°C.
Claim 18
Dependent Claim
31 words
A method of environmentally protecting a substrate which comprises surrounding the substrate with a housing such that a composition according to claim 1 is positioned between the substrate and the housing.
Claim 19
Dependent Claim
13 words
A method according to claim 15,in which the composition is maintained under compression.
References Cited (Backward Citations)
No citation records indexed.
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