US4229338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Suede-look shoe soles
Assignee: Shell USA Inc
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Filing: 1979-05-11
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Granted: 1980-10-21
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Expires: 1999-05-11
Abstract
Abstract A footwear composition having a simulated suede appearance is prepared by melt blending a monoalkenyl arene/diene block copolymer, oil, silica filler, styrene polymer, pigment and synthetic fiber at a temperature below the melting point of the fiber. The synthetic fiber is preferably selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof.
Inventors
- 👤 David R. Hansen
- 👤 Glenn R. Himes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:50
CPC Classifications
C; C08; C08K; C08K3/00; C08K3/34; C08K3/36; C08L; C08L53/00; C08L53/02
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
178 words
A footwear composition having a simulated suede appearance comprising: (a) 100 parts by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B, each block A having an average molecular weight between about 5,000 and about 125,000 and each block B having an average molecular weight between about 15,000 and about 350,000, said blocks A comprising 8-65% by weight of the copolymer; (b) about 5 to about 125 parts by weight of a styrene polymer; (c) about 5 to about 175 parts by weight of a hydrocarbon extending oil; (d) about 2 to about 150 parts by weight of a finely divided silica filler; (e) about 0.1 to about 10 parts by weight of a pigment; and (f) about 5 to about 50 parts by weight of a synthetic fiber selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof; wherein the various components are melt blended at a temperature below the melting point of said synthetic fiber.
Claim 2
Dependent Claim
178 words
A footwear composition having a simulated suede appearance comprising: (a) 100 parts by weight of a block copolymer having at least two monoalkenyl arene polymer end blocks A and at least one elastomeric conjugated diene mid block B, each block A having an average molecular weight between about 5,000 and about 125,000 and each block B having an average molecular weight between about 15,000 and about 350,000, said blocks A comprising 8-65% by weight of the copolymer; (b) about 5 to about 125 parts by weight of a styrene polymer; (c) about 5 to about 175 parts by weight of a hydrocarbon extending oil; (d) about 2 to about 150 parts by weight of a finely divided silica filler; (e) about 0.1 to about 10 parts by weight of a pigment; and (f) about 5 to about 50 parts by weight of a synthetic fiber selected from the group consisting of polyamide fibers, polyester fibers, acrylic fibers, and mixtures thereof; wherein the various components are melt blended at a temperature below the melting point of said synthetic fiber.
Claim 3
Dependent Claim
22 words
A composition according to claim 1 wherein said block A is a polystyrene block and said block B is a polybutadiene block.
Claim 4
Dependent Claim
14 words
A composition according to claim 2 wherein said styrene polymer is high impact polystyrene.
Claim 5
Dependent Claim
48 words
A composition according to claim 1 wherein said block copolymer is selectively hydrogenated such that no more than about 25% of the aromatic double bonds of block A are reduced by hydrogenation while at least 75% of the aliphatic double bonds of block B are reduced by hydrogenation.
Claim 6
Dependent Claim
21 words
A composition according to claim 1 wherein said synthetic fiber is a blend of a polyester fiber and an acrylic fiber.
Claim 7
Dependent Claim
23 words
A composition according to claim 1 wherein the components are blended together at a temperature between about 120° C. and about 210° C.
Claim 8
Dependent Claim
12 words
A composition according to claim 1 wherein said pigment is titanium dioxide.
Claim 9
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) | 1983-10-21 | 1984-04-21 | 1984-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-21 | 1988-04-21 | 1988-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-21 | 1992-04-21 | 1992-10-21 | $7700.00 | Window Closed / Lapsed |