US4048254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blend of thermoplastic polymers with block radial butadiene-styrene polymers
Assignee: Abbott Laboratories
•
Filing: 1975-08-26
•
Granted: 1977-09-13
•
Expires: 1995-08-26
Abstract
Abstract Radial block copolymers are mechanically combined with additional polymeric materials to form plastic compositions having a high degree of clarity so that they can be substituted for polyvinylchloride plastic compositions in the fabrication of such devices as intravenous and blood tubing, containers for intravenous solutions and blood fractions, functional parts of intravenous administration equipment such as sight and drip chambers, needle adapters and miscellaneous assemblies for contact with intravenous fluids. The compounds of this invention can also be utilized for catherization, bodily drainage systems, and as pharmaceutical closures, resealable injection sites and syringe plunger tips.
Inventors
- 👤 Edward Lawrence Hillier
- 👤 Glen Henry Graham
- 👤 Warren Evan Eichelberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 00:22
CPC Classifications
A; A61; A61M; A61M39/00; A61M39/08; A61L; A61L29/00; A61L29/04; A61L29/049; A61M5/00; A61M5/178; A61M5/31; C; C08; C08L; C08L53/00; C08L53/02; Y; Y10; Y10S; Y10S525/00; Y10S525/901; Y10S525/937; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/1352; Y10T428/139; Y10T428/1397
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
196 words
An unvulcanized radial block copolymer mixture having a high degree of clarity and resealability consisting essentially of (a) from about 10 - 90% by weight of a butadiene-styrene radial block copolymer having a butadiene content in the range of about 85 - 60% by weight and a styrene content in the range of about 5 - 40% by weight, (b) from about 90 - 10% by weight of a butadiene-styrene radial block copolymer having a different butadiene-styrene content in the range of about 85 - 60% by weight and a styrene content in the range of about 15 - 40% by weight and (c) about 5 - 75% by weight of said radial block copolymer mixture of a clear polymeric material selected from the group consisting of polyether and polyester urethane polymers and mixtures of said clear polymeric material, both said radial block copolymers having an average molecular weight of at least 150,000 as measured by inherent viscosity in toluene, wherein said polyether urethane polymers are the reaction products of polyether glycols and aromatic diisocyanates and said polyester urethanes are the reaction products of linear hydroxyl terminated aliphatic polyesters, an aromatic diisocyanate and an aliphatic diol.
Claim 2
Dependent Claim
196 words
An unvulcanized radial block copolymer mixture having a high degree of clarity and resealability consisting essentially of (a) from about 10 - 90% by weight of a butadiene-styrene radial block copolymer having a butadiene content in the range of about 85 - 60% by weight and a styrene content in the range of about 5 - 40% by weight, (b) from about 90 - 10% by weight of a butadiene-styrene radial block copolymer having a different butadiene-styrene content in the range of about 85 - 60% by weight and a styrene content in the range of about 15 - 40% by weight and (c) about 5 - 75% by weight of said radial block copolymer mixture of a clear polymeric material selected from the group consisting of polyether and polyester urethane polymers and mixtures of said clear polymeric material, both said radial block copolymers having an average molecular weight of at least 150,000 as measured by inherent viscosity in toluene, wherein said polyether urethane polymers are the reaction products of polyether glycols and aromatic diisocyanates and said polyester urethanes are the reaction products of linear hydroxyl terminated aliphatic polyesters, an aromatic diisocyanate and an aliphatic diol.
Claim 3
Dependent Claim
20 words
The radial block copolymer mixture as defined in claim 1 wherein said polymeric material is a thermoplastic polyether urethane polymer.
Claim 4
Dependent Claim
20 words
The radial block copolymer mixture as defined in claim 1 wherein said polymeric material is a thermoplastic polyester urethane polymer.
Claim 5
Dependent Claim
65 words
The radial block copolymer mixture as defined in claim 1 wherein the amount of butadiene in said (a) portion of said radial block copolymer mixture is 70% by weight and said styrene amount is 30% by weight and wherein the amount of butadiene in said (b ) portion of said radial block copolymer mixture is 60% by weight and said styrene is 40% by weight.
Claim 6
Dependent Claim
54 words
The radial block copolymer mixture as defined in claim 4 wherein said (a) portion of said radial block copolymer mixture is present in an amount of about 90 - 45% by weight and said (b) portion of said radial block copolymer mixture is present in an amount of about 10 - 55% by weight.
Claim 7
Dependent Claim
50 words
The radial block copolymer mixture as defined in claim 4 wherein said (a) portion of said radial block copolymer mixture is present in an amount of about 75% by weight and said (b) portion of said radial block copolymer mixture is present in an amount of about 25% by weight.
Claim 8
Dependent Claim
16 words
The radial block copolymer mixture as defined in claim 2 further including a butadient-styrene-methyl methacrylate copolymer.
Claim 9
Dependent Claim
39 words
The radial block copolymer mixture as defined in claim 2 wherein said thermoplastic polyether urethane is present in the range of about 10 to about 50 parts by weight per 100 parts by weight of said radial block copolymers.
Claim 10
Dependent Claim
37 words
The radial block copolymer mixture as defined in claim 5 wherein said thermoplastic polyester urethane is present in an amount not exceeding about 50 parts by weight per 100 parts by weight of said radial block copolymers.
Claim 11
Dependent Claim
40 words
The radial block copolymer mixture as defined in claim 1 further including a plasticizer present in an amount in the range of about 2 to about 50 parts by weight per 100 parts by weight of said radial block copolymers.
Claim 12
Dependent Claim
16 words
The radial block copolymer mixture as defined in claim 10 wherein said plasticizer is mineral oil.
Claim 13
Dependent Claim
21 words
The radial block copolymer mixture as defined in claim 1 wherein said mixture is molded to form a medical plastic product.
Claim 14
Dependent Claim
15 words
The medical plastic product as defined in claim 12 in the form of plastic tubing.
Claim 15
Dependent Claim
16 words
The medical plastic product as defined in claim 12 in the form of a drip chamber.
Claim 16
Dependent Claim
16 words
The medical plastic product as defined in claim 12 in the form of a reseal device.
Claim 17
Dependent Claim
15 words
The medical plastic product as defined in claim 12 in the form of an adapter.
Claim 18
Dependent Claim
16 words
The medical plastic product as defined in claim 16 wherein said adapter is a needle adapter.
Claim 19
Dependent Claim
15 words
The medical plastic product as defined in claim 12 in the form of a closure.
Claim 20
Dependent Claim
16 words
The medical plastic product as defined in claim 18 wherein said closure is a pharmaceutical closure.
Claim 21
Dependent Claim
17 words
The medical plastic product as defined in claim 12 in the form of a syringe plunger tip.
Claim 22
Dependent Claim
16 words
The medical plastic product as defined in claim 12 in the form of a flexible container.
Claim 23
Dependent Claim
16 words
The medical plastic product as defined in claim 12 in the form of an elastomeric bulb.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-09-12 | 1981-03-14 | 1981-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-12 | 1985-03-14 | 1985-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-12 | 1989-03-14 | 1989-09-13 | $7700.00 | Window Closed / Lapsed |