US5304599A
Expired / Lapsed
US
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Low stress relaxation extrudable elastomeric composition
Assignee: Kraton Polymers US LLC
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Filing: 1991-09-27
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Granted: 1994-04-19
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Expires: 2011-09-27
Abstract
Abstract An extrudable elastomeric composition includes an elastomeric polymer and a tackifying resin in which the extrudable elastomeric composition is adapted to form an elastic sheet having a stress relaxation of less than about 30 percent. The elastomeric polymer is a styrene-poly(ethylene-propylene)-styrene thermoplastic elastomeric block copolymer or a mixture of styrene-poly(ethylene-propylene)-styrene and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers. The extrudable elastomeric composition may also include a polyolefin and/or an extending oil.
Inventors
- 👤 Glenn R. Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 09:56
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L53/00; C08L53/02; C08L53/025; C08J2353/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
157 words
An elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR3## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; and (b) no less than 15% by weight and no more than 28% by weight of a tackifying resin.
Claim 2
Dependent Claim
157 words
An elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR3## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; and (b) no less than 15% by weight and no more than 28% by weight of a tackifying resin.
Claim 3
Dependent Claim
178 words
An extrudable elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) from 50 to 80% by weight of an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR4## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; and (b) from 3 to 25% by weight of a polyolefin. (c) from 15 to 28% of a tackifying resin; and (d) from 0 to 15% by weight of an extending oil.
Claim 4
Dependent Claim
178 words
An extrudable elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) from 50 to 80% by weight of an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR4## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; and (b) from 3 to 25% by weight of a polyolefin. (c) from 15 to 28% of a tackifying resin; and (d) from 0 to 15% by weight of an extending oil.
Claim 5
Dependent Claim
26 words
The composition of claim 2 wherein the polyolefin is selected from the group including polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, butylene copolymers and mixtures thereof.
Claim 6
Dependent Claim
13 words
The composition of claim 2 wherein the extending oil is a mineral oil.
Claim 7
Dependent Claim
157 words
An elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR5## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene blocks to poly(ethylene-propylene) blocks ranges from about 10:90 to about 25:75; and the styrene-poly(ethylene-propylene)-styrene units are chemically attached; and (b) from 15 to 28% by weight of a tackifying resin.
Claim 8
Dependent Claim
157 words
An elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR5## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene blocks to poly(ethylene-propylene) blocks ranges from about 10:90 to about 25:75; and the styrene-poly(ethylene-propylene)-styrene units are chemically attached; and (b) from 15 to 28% by weight of a tackifying resin.
Claim 9
Dependent Claim
184 words
An extrudable elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) from 50 to 80% by weight of an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR6## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene blocks to poly(ethylene-propylene) blocks ranges from about 10:90 to about 25:75; and the styrene-poly(ethylene-propylene)-styrene units are chemically attached; (b) from 3 to 25% by weight of a polyolefin; (c) from 15 to 28% of a tackifying resin; and (d) from 0 to 15% by weight of an extending oil.
Claim 10
Dependent Claim
184 words
An extrudable elastomeric composition for extrusion into an elastic sheet having a stress relaxation of less than about 30 percent consisting of: (a) from 50 to 80% by weight of an elastomeric polymer selected from the group consisting of styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer and a mixture of at least 55 parts by weight of styrene-(ethylene-propylene)-styrene block copolymers per 100 parts by weight of elastomeric polymer and styrene-poly(ethylene-butylene)-styrene elastomeric block copolymers wherein the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR6## wherein m is an integer from about 38 to about 337; w is an integer from about 250 to about 930; R is selected from the group consisting of phenyl groups and substituted phenyl groups; x is an integer from about 2 to about 30; Y is coupling agent; and the weight ratio of polystyrene blocks to poly(ethylene-propylene) blocks ranges from about 10:90 to about 25:75; and the styrene-poly(ethylene-propylene)-styrene units are chemically attached; (b) from 3 to 25% by weight of a polyolefin; (c) from 15 to 28% of a tackifying resin; and (d) from 0 to 15% by weight of an extending oil.
Claim 11
Dependent Claim
26 words
The composition of claim 6 wherein the polyolefin is selected from the group including polyethylene, polypropylene, polybutylene, ethylene copolymers, propylene copolymers, butylene copolymers and mixtures thereof.
Claim 12
Dependent Claim
13 words
The composition of claim 6 wherein the extending oil is a mineral oil.
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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) | 1997-04-18 | 1997-10-18 | 1998-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-04-18 | 2001-10-18 | 2002-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-04-18 | 2005-10-18 | 2006-04-19 | $7700.00 | Window Closed / Lapsed |