US5093422A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low stress relaxation extrudable elastomeric composition
Assignee: Kraton Polymers US LLC
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Filing: 1990-04-23
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Granted: 1992-03-03
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Expires: 2010-04-23
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 or 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 12:16
CPC Classifications
C; C08; C08J; C08J5/00; C08J5/18; C08L; C08L53/00; C08L53/02; C08L53/025; C08J2353/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 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 mixtrue of at least about 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; and n is an integer from about 500 to about 1860; and R is selected from the group consisting of phenyl groups and substituted phenyl groups; 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 about 15 percent by weight and no more than abut 28 percent by weight of a tackifying resin.
Claim 2
Dependent Claim
150 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 mixtrue of at least about 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; and n is an integer from about 500 to about 1860; and R is selected from the group consisting of phenyl groups and substituted phenyl groups; 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 about 15 percent by weight and no more than abut 28 percent by weight of a tackifying resin.
Claim 3
Dependent Claim
179 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 about 50 to about 80 percent 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 about 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 in the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR4## wherein m is an integer from about 38 to about 337; and n is an integer from about 500 to about 1860; and R is selected from the group consisting of phenyl group and substituted phenyl groups; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; (b) from about 3 to about 25 percent by weight of a polyolefin; (c) from about 15 to about 28 percent of a tackifying resin; and (d) from about 0 to about 15 percent by weight of an extending oil.
Claim 4
Dependent Claim
179 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 about 50 to about 80 percent 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 about 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 in the styrene-poly(ethylene-propylene)-styrene elastomeric block copolymer has the formula: ##STR4## wherein m is an integer from about 38 to about 337; and n is an integer from about 500 to about 1860; and R is selected from the group consisting of phenyl group and substituted phenyl groups; and the weight ratio of polystyrene endblocks to poly(ethylene-propylene) endblocks ranges from about 10:90 to about 25:75; (b) from about 3 to about 25 percent by weight of a polyolefin; (c) from about 15 to about 28 percent of a tackifying resin; and (d) from about 0 to about 15 percent 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.
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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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |