US4495323A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent resistant polymeric composition
Assignee: Shell USA Inc
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Filing: 1984-02-06
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Granted: 1985-01-22
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Expires: 2004-02-06
Abstract
Abstract A polymeric composition having good hardness, stiffness and tear strength and good resistance to flex cracking, solvent attack and abrasion comprises a radial monoalkenyl arene-conjugated diene block copolymers, a linear low density polyethylene, hydrocarbon extending oil, polystyrene resin and a filler.
Inventors
- 👤 James H. Collins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:24
CPC Classifications
C; C08; C08L; C08L53/00; C08L53/02; C08K; C08K3/00; C08K3/01; C08K3/013; C08L25/00; C08L25/02; C08L25/04; C08L2205/00; C08L2205/02; C08L2205/03; C08L2205/035; C08L23/00; C08L23/02; C08L23/04; C08L23/08; C08L23/0807; C08L23/0815; C08L25/16
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
248 words
A polymeric composition comprising: (a) about 5 to about 90 parts by weight of a radial (AB) x BA block copolymer where x is greater than 1, each block A being a monoalkenyl arene polymer block having an average molecular weight between about 5,000 and about 30,000, each block B being an elastomeric conjugated diene polymer block having an average molecular weight between about 15,000 and about 300,000, the blocks A comprising between about 20 and about 40 percent by weight of said block copolymer having a melt index between about 0.1 and about 30.0; (b) 0-100 parts of a radial (C D) x DC block copolymer where x is greater than 1, each block C being a monoalkenyl arene polymer block having an average molecular weight between about 20,000 and about 40,000, each block D being an elastomeric conjugated diene polymer block having an average molecular weight between about 15,000 and about 300,000, the blocks C comprising about 40 to about 55 percent by weight of said block copolymer; (c) about 10 to about 95 parts by weight of a linear low density polyethylene having a melt index between about 0.1 and 30, and a density greater than about 0.90 grams per cubic centimeter; (d) about 0 to about 200 parts by weight of a hydrocarbon rubber extending oil; (e) about 0 to about 150 parts by weight of a polystyrene resin; and (f) about 0 to about 200 parts by weight of a finely divided filler.
Claim 2
Dependent Claim
248 words
A polymeric composition comprising: (a) about 5 to about 90 parts by weight of a radial (AB) x BA block copolymer where x is greater than 1, each block A being a monoalkenyl arene polymer block having an average molecular weight between about 5,000 and about 30,000, each block B being an elastomeric conjugated diene polymer block having an average molecular weight between about 15,000 and about 300,000, the blocks A comprising between about 20 and about 40 percent by weight of said block copolymer having a melt index between about 0.1 and about 30.0; (b) 0-100 parts of a radial (C D) x DC block copolymer where x is greater than 1, each block C being a monoalkenyl arene polymer block having an average molecular weight between about 20,000 and about 40,000, each block D being an elastomeric conjugated diene polymer block having an average molecular weight between about 15,000 and about 300,000, the blocks C comprising about 40 to about 55 percent by weight of said block copolymer; (c) about 10 to about 95 parts by weight of a linear low density polyethylene having a melt index between about 0.1 and 30, and a density greater than about 0.90 grams per cubic centimeter; (d) about 0 to about 200 parts by weight of a hydrocarbon rubber extending oil; (e) about 0 to about 150 parts by weight of a polystyrene resin; and (f) about 0 to about 200 parts by weight of a finely divided filler.
Claim 3
Dependent Claim
28 words
The composition according to claim 1 wherein said A blocks, and said C blocks are polystyrene blocks while said B blocks, and said D blocks are polybutadiene blocks.
Claim 4
Dependent Claim
23 words
The composition according to claim 1 wherein said copolymers and said polyethylene have melt flow indices of between about 0.1 and about 30.0.
Claim 5
Dependent Claim
31 words
The composition according to claim 1 wherein said polystyrene resin is a poly (alpha-methylstyrene) resin and the amount of said polystyrene is between about 5 and about 30 parts by weight.
Claim 6
Dependent Claim
36 words
The composition according to claim 1 wherein said filler is selected from the groups consists of calcium carbonate and silica and the amount of said filler is between about 10 and about 60 parts by weight.
Claim 7
Dependent Claim
37 words
The composition of claim 1 wherein said (a) component is present at between about 30 and about 70 parts by weight and said (c) component is present at between about 30 and about 70 parts by weight.
Claim 8
Dependent Claim
9 words
A shoe sole having the composition of claim 1.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |