US4440815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear, autoclavable plastic formulation for medical liquid containers
Assignee: Abbott Laboratories
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Filing: 1983-09-08
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Granted: 1984-04-03
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Expires: 2003-09-08
Abstract
Abstract A clear, flexible, thermoplastic material capable of being processed into hollow shapes by conventional thermoplastic processing methods and subsequently autoclaved, comprises four components: from about 45 to 70% by weight of a polyolefin polypropylene, including its copolymers, admixed with from; about 5 to 25% by weight of an ethylene loweralkyl acrylate polymer from; about 10 to 40% by weight of a thermoplastic ethylene butylene block copolymer elastomer having terminal polystyrene blocks; and from 0 to 15% of a high-boiling point petroleum distillation byproduct as represented by mineral oil. The above material is particularly desirable for manufacturing medical liquid containers such as autoclavable, flexible, collapsible, intravenous solution containers.
Inventors
- 👤 Mostafa Zomorodi
- 👤 Alan J. Trieber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:53
CPC Classifications
C; C08; C08L; C08L23/00; C08L23/02; C08L23/10; C08L23/12; C08L2205/00; C08L2205/03; C08L2205/035; C08L23/04; C08L23/08; C08L23/0846; C08L23/0869; C08L53/00; C08L53/02; C08L91/00; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/1352; Y10T428/1397
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A clear, flexible, thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45% to about 70% by weight of a polyolefin consisting essentially of polypropylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10% to about 40% by weight of a thermoplastic elastomer composition consisting essentially of an ethylene butylene block copolymer having terminal polystyrene units, and (d) from 0 to about 15% of a high boiling point petroleum distillation byproduct.
Claim 2
Dependent Claim
97 words
A clear, flexible, thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45% to about 70% by weight of a polyolefin consisting essentially of polypropylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10% to about 40% by weight of a thermoplastic elastomer composition consisting essentially of an ethylene butylene block copolymer having terminal polystyrene units, and (d) from 0 to about 15% of a high boiling point petroleum distillation byproduct.
Claim 3
Dependent Claim
86 words
A clear, flexible plastic material capable of being blow molded and autoclaved comprising: (a) from about 45 to about 70% by weight of a polyolefin consisting essentially of propylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of a polymer selected from the group consisting of ethylene methyl acrylate, (c) from abut 10 to 40% by weight of a thermoplastic elastomer consisting essentially of block copolymers of styrene, ethylene and butylene, and (d) from 10 to about 15% mineral oil.
Claim 4
Dependent Claim
86 words
A clear, flexible plastic material capable of being blow molded and autoclaved comprising: (a) from about 45 to about 70% by weight of a polyolefin consisting essentially of propylene, and copolymers thereof, admixed with, (b) from about 5 to about 25% by weight of a polymer selected from the group consisting of ethylene methyl acrylate, (c) from abut 10 to 40% by weight of a thermoplastic elastomer consisting essentially of block copolymers of styrene, ethylene and butylene, and (d) from 10 to about 15% mineral oil.
Claim 5
Dependent Claim
46 words
The plastic formulation as disclosed in claim 1 wherein said ethylene-butylene block copolymer has a central block comprising 50 to 85% by weight of the copolymer molecule of a rubbery olefin polymer of generally equal proportions of ethylene and butylene units; and terminal blocks of polystyrene.
Claim 6
Dependent Claim
29 words
The plastic formulation as disclosed in claim 1 wherein said block copolymer has at least two monoalkenylarene polymer blocks and at least one substantially completely hydrogenated diene polymer block.
Claim 7
Dependent Claim
61 words
The plastic formulation as disclosed in claim 1 wherein said polyolefin (a) and said polymer (b) are mechanically combined in a mixture of approximately 70-90% by weight polyolefin and 10-30% by weight polymer, said mixture then being mechanically combined with said thermoplastic composition in a ratio of approximately 70% by weight polyolefin/polymer mixture to approximately 30% by weight thermoplastic elastomer composition.
Claim 8
Dependent Claim
19 words
The plastic composition as disclosed in claim 4 wherein said block copolymer has the structure polystyrene hydrogenated polybutadiene polystyrene.
Claim 9
Dependent Claim
19 words
A clear, flexible, collapsible container being blow molded and subsequently made from the plastic material disclosed in claim 1.
Claim 10
Dependent Claim
22 words
A clear, flexible, collapsible medical liquid container being blow molded and subsequently autoclaved, made from the plastic material disclosed in claim 1.
Claim 11
Dependent Claim
156 words
A clear, flexible thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45-70% by weight of a polyolefin consisting essentially of polypropylene, mixed with (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10 to 40% by weight of a thermoplastic elastomers composition selected from the group consisting of: a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenylarene polymers and hydrogenated products thereof wherein no more than 25% of the arene double bonds have been reduced and polymer block B is a hydrogenated polymer block of a C 4-5 conjugated diene polymer wherein at least about 30% of the aliphatic unsaturation has been reduced by hydrogenation, and (d) from about 0 to about 15% mineral oil.
Claim 12
Dependent Claim
156 words
A clear, flexible thermoplastic material capable of being processed into hollow shapes by conventional plastic processing methods and subsequently autoclaved comprising: (a) from about 45-70% by weight of a polyolefin consisting essentially of polypropylene, mixed with (b) from about 5 to about 25% by weight of ethylene loweralkyl acrylate polymers, (c) from about 10 to 40% by weight of a thermoplastic elastomers composition selected from the group consisting of: a block copolymer having at least two polymer blocks A and at least one polymer block B, each polymer block A being selected from the group consisting of monoalkenylarene polymers and hydrogenated products thereof wherein no more than 25% of the arene double bonds have been reduced and polymer block B is a hydrogenated polymer block of a C 4-5 conjugated diene polymer wherein at least about 30% of the aliphatic unsaturation has been reduced by hydrogenation, and (d) from about 0 to about 15% 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) | 1987-04-03 | 1987-10-03 | 1988-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-04-03 | 1991-10-03 | 1992-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-04-03 | 1995-10-03 | 1996-04-03 | $7700.00 | Window Closed / Lapsed |