US4282876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radiopaque polyurethane resin compositions
Assignee: Becton Dickinson and Co
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Filing: 1979-12-28
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Granted: 1981-08-11
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Expires: 1999-12-28
Abstract
Abstract Radiopaque compositions are provided by formulating polyurethane resins, alone, or combined with vinyl resins, with alkyl or alkoxyalkyl 2,5-diiodobenzoates, 2,3,4,6-tetraiodobenzoates or mixtures thereof. The compositions are useful in the manufacture of X-ray opaque medical devices, particularly medical surgical tubing. Surgical tubing with excellent plastic memory is provided, well adapted to forming flares and curved tips necessary for selective renal and celial arteriography. Multi-wall and co-tapered multiwall tubing constructions are also disclosed.
Inventors
- 👤 Vincent J. Flynn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:25
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; A; A61; A61L; A61L29/00; A61L29/04; A61L29/049; A61L29/06; A61L29/14; A61L29/18; A61M; A61M25/00; A61M25/0009; A61M25/0021; A61M25/0041; A61M25/0043; A61M25/0045; A61M25/01; A61M25/0105; A61M25/0108; B; B29; B29C; B29C48/00; B29C48/16; B29C48/18; B29C48/21; B29C48/25; B29C48/30; B29C48/32; B29C48/335; B29C48/336; A61B; A61B90/00; A61B90/39; A61F; A61F2210/00; A61F2210/0014; A61F2210/0019; B29C48/03; B29C48/09; B29L; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
A medical-surgical catheter formed from tubing comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR2## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl or a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 2
Dependent Claim
92 words
A medical-surgical catheter formed from tubing comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR2## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl or a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 3
Dependent Claim
144 words
A medical-surgical catheter tubing comprising (1) an interior tubular portion of a radiopaque composition comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or tetraiodobenzoate compound of the formula ##STR3## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl and a mixture of said compunds, said radiopacifier (b) comprising 100 to 40 parts by weight per 100 parts by weight of (a) and (b), and (2) a concentric outer shell of (a) a vinyl resin as defined above under (1) (a) and which further includes a minor proportion of a radioparent plasticizer and a minor proportion of a heat stabilizer for said vinyl resin; (b) nylon or (c) polypropylene.
Claim 4
Dependent Claim
144 words
A medical-surgical catheter tubing comprising (1) an interior tubular portion of a radiopaque composition comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or tetraiodobenzoate compound of the formula ##STR3## wherein R 1 is hydrogen or iodo, and R is alkyl or alkoxyalkyl and a mixture of said compunds, said radiopacifier (b) comprising 100 to 40 parts by weight per 100 parts by weight of (a) and (b), and (2) a concentric outer shell of (a) a vinyl resin as defined above under (1) (a) and which further includes a minor proportion of a radioparent plasticizer and a minor proportion of a heat stabilizer for said vinyl resin; (b) nylon or (c) polypropylene.
Claim 5
Dependent Claim
30 words
A medical-surgical catheter tubing as defined in claim 2 wherein, in said interior tubular portion, said resin component (a) consists of a thermoplastic polyurethane and said radiopacifier comprises n-butyl 2,3,4,6-tetraiodobenzoate.
Claim 6
Dependent Claim
25 words
A medical-surgical catheter tubing as defined in claim 2 wherein interior tubular portion (1) is relatively thin and outer shell portion (2) is relatively thick.
Claim 7
Dependent Claim
46 words
A medical-surgical catheter tubing comprising (1) an interior tubular portion of a relatively softer as measured by durometer hardness composition as defined in claim 2 and (2) a concentric outer shell of a relatively harder as measured by durometer hardness composition as defined in claim 2.
Claim 8
Dependent Claim
109 words
A medical-surgical catheter tubing comprising (1) an interior tubing portion of nylon or polypropylene and (2) a concentric outer shell of a radiopaque composition comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR4## wherein R 1 is hydrogen or iodo, R is alkyl or alkoxyalkyl and a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 9
Dependent Claim
109 words
A medical-surgical catheter tubing comprising (1) an interior tubing portion of nylon or polypropylene and (2) a concentric outer shell of a radiopaque composition comprising (a) a resin which includes from 100 to 33 parts by weight of a thermoplastic polyurethane and from 0 to 67 parts of a polymer of a halogenated vinyl monomer; and (b) a radiopacifier therefor consisting of a diiodobenzoate or a tetraiodobenzoate compound of the formula ##STR4## wherein R 1 is hydrogen or iodo, R is alkyl or alkoxyalkyl and a mixture of said compounds, said radiopacifier (b) comprising 10 to 40 parts by weight per 100 parts by weight of (a) and (b).
Claim 10
Dependent Claim
16 words
A medical-surgical tubing as defined in claim 6 wherein said interior tubing portion (1) comprises nylon.
Claim 11
Dependent Claim
16 words
A medical-surgical tubing as defined in claim 6 wherein said interior tubing portion (1) comprises polypropylene.
Claim 12
Dependent Claim
76 words
A medical-surgical tubing as defined in claim 6 having a first point along its length and a second point along its length spaced apart from said first point, the thickness of said interior tubing portion (1) tapering as it passes from said first point to said second point and the thickness of said outer shell (2) tapering inversely to the taper of said interior tubing as it passes from said first point to said second point.
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) | 1984-08-10 | 1985-02-09 | 1985-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-10 | 1989-02-09 | 1989-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-10 | 1993-02-09 | 1993-08-11 | $7700.00 | Window Closed / Lapsed |