US4616064A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymeric compositions suitable for use in the medical field and comprising a thermoplastic olefin, a siloxane polymer, and an elastomer
Assignee: Tyco International Ltd Bermuda
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Filing: 1984-07-23
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Granted: 1986-10-07
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Expires: 2004-07-23
Abstract
Abstract Polymeric compositions comprising 7-28%, preferably 12 to 25%, of a thermoplastic olefin polymer, 1-10%, preferably 2 to 6%, of a siloxane polymer containing 2-70% of siloxane units and at least 20% by weight of carbonate, urethane or amide units, and 69 to 90%, preferably 72 to 83%, of an elastomer. The olefin polymer can for example be polyethylene, polypropylene, or a polar ethylene copolymer. The elastomer can be a thermoplastic elastomer, an ionomer, or a styrene/butadiene copolymer. The compositions are particularly useful in the medical field, for example in the form of tubing.
Inventors
- 👤 Mimzee Zukosky
- 👤 Ronald L. Dieck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:59
CPC Classifications
A; A61; A61L; A61L29/00; A61L29/04; A61L29/049; A61L27/00; A61L27/14; A61L27/26; C; C08; C08L; C08L21/00; C08L53/00; C08L53/02; C08L2205/00; C08L2205/03; C08L67/00; C08L67/02; C08L77/00; C08L83/00; C08L83/04; C08L9/00; C08L9/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
130 words
A polymeric composition which comprises: (a) 5 to 40% of a thermoplastic polymer which is a polyolefin or a copolymer of an olefin and one or more polar comonomers, (b) 1 to 10% of a polymeric component consisting essentially of an interpenetrating network of a polysiloxane and a polyurethane or polyamide, the polymeric component containing 2 to 70% by weight of the polysiloxane, and at least 30% by weight of the polyurethane or polyamide, and (c) 55 to 94% of an elastomer having a Shore D Hardness of less than 60, said elastomer being selected from the group consisting of ionomers, styrene/butadiene copolymers, copolyester thermoplastic elastomers and amorphous polyamides, the amounts of components (a), (b) and (c) being by weight, based on the total weight of (a), (b) and (c).
Claim 2
Dependent Claim
130 words
A polymeric composition which comprises: (a) 5 to 40% of a thermoplastic polymer which is a polyolefin or a copolymer of an olefin and one or more polar comonomers, (b) 1 to 10% of a polymeric component consisting essentially of an interpenetrating network of a polysiloxane and a polyurethane or polyamide, the polymeric component containing 2 to 70% by weight of the polysiloxane, and at least 30% by weight of the polyurethane or polyamide, and (c) 55 to 94% of an elastomer having a Shore D Hardness of less than 60, said elastomer being selected from the group consisting of ionomers, styrene/butadiene copolymers, copolyester thermoplastic elastomers and amorphous polyamides, the amounts of components (a), (b) and (c) being by weight, based on the total weight of (a), (b) and (c).
Claim 3
Dependent Claim
31 words
A composition according to claim 1 in which the polymeric component consists essentially of 7 to 28% of polymer(a), 1 to 10% of polymer(b) and 62 to 92% of polymer (c).
Claim 4
Dependent Claim
33 words
A composition according to claim 2 in which the polymeric component consists essentially of 15 to 22% of polymer (a), 2 to 6% of polymer (b) and 72 to 83% of polymer (c).
Claim 5
Dependent Claim
32 words
A composition according to claim 1 wherein polymer (a) is polyethylene, polypropylene, or a copolymer of an olefin and one or more of vinyl acetate, ethyl acrylate, methyl acrylate, and methyl methacrylate.
Claim 6
Dependent Claim
19 words
A composition according to claim 1 wherein the polymer (b) comprises 2 to 15% by weight of the polysiloxane.
Claim 7
Dependent Claim
22 words
A composition according to claim 1, wherein the polymer (b) comprises a polyurethane derived from an aliphatic ether or an aromatic ester.
Claim 8
Dependent Claim
15 words
A composition according to claim 1, wherein the polymer (c) is a polystyrene/polybutadiene/polystyrene block copolymer.
Claim 9
Dependent Claim
11 words
A composition according to claim 1, which has been radiation cross-linked.
Claim 10
Dependent Claim
13 words
A composition according to claim 1 wherein polymer (a) is polyethylene, or polypropylene.
Claim 11
Dependent Claim
23 words
A composition according to claim 1 which has a tensile strength of 2,000 to 3,500 psi and an elongation of 500 to 650%.
Claim 12
Dependent Claim
23 words
A composition according to claim 1 which has a tensile strength of 1,000 to 2,000 psi and an elongation of at least 650%.
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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) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |