US4560720A
Expired / Lapsed
US
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Compositions of polyvinyl chloride and tetracarboxylic tetraesters and medical articles thereof
Assignee: Terumo Corp
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Filing: 1983-10-17
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Granted: 1985-12-24
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Expires: 2003-10-17
Abstract
Abstract Medical articles made of a resin composition comprising a polyvinyl chloride and a tetracarboxylic tetraester are provided. As examples of the tetracarboxylic tetraester are mentioned tetra(2-ethylhexyl) 3,3',4,4'-biphenylethertetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenylmethanetetracarboxylate, tetra(n-dodecyl) 2,3,3',4'-biphenyl-1,1-ethanetetracarboxylate, tetra(2-ethylhexyl) 3,3',4,4'-biphenyl-2,2-propanetetracarboxylate and the like. The tetracarboxylic tetraester is incorporated in an amount from 20 to 120, preferably from 30 to 100 parts by weight per 100 parts by weight of the polyvinyl chloride. As dissolution and migration to the surface of the article of the plasticizer tetracarboxylic tetraester are low in the medical articles, said medical articles produce no adverse effects upon body fluids such as blood when contacted. Examples of preferred medical articles are blood preservation vessels, catheters and blood transfusion sets.
Inventors
- 👤 Juuro Aoyagi
- 👤 Toshiji Ichikawa
- 👤 Mikio Koide
- 👤 Takeshi Shimomura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:59
CPC Classifications
A; A61; A61J; A61J1/00; A61J1/05; A61J1/10; C; C08; C08K; C08K5/00; C08K5/04; C08K5/10; C08K5/12; C08K5/36; C08K5/37; C08K5/375; C08K5/41
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
111 words
A composition for formulating medical articles comprising a body fluid preservation vessel, a catherter, a blood transfusion set, an aqueous infusion set, or a blood circuit, said composition comprising a polyvinyl chloride and a tetracarboxylic tetraester represented by the general formula I ##EQU2## wherein X is --O--, --CH 2 ) n (in which n is an integer from 1 to 6), --C(CH 3 ) 2 --, --CH(CH 3 )--, --S--, --CH(CF 3 )--, --C(CF 3 ) 2 --, ##STR6## --O--Ar--O-- (in which Ar is an aryl group) or ##STR7## (in which Y is H of F) and R is an aliphatic saturated hydrocarbon group containing from 4 to 18 carbon atoms.
Claim 2
Dependent Claim
111 words
A composition for formulating medical articles comprising a body fluid preservation vessel, a catherter, a blood transfusion set, an aqueous infusion set, or a blood circuit, said composition comprising a polyvinyl chloride and a tetracarboxylic tetraester represented by the general formula I ##EQU2## wherein X is --O--, --CH 2 ) n (in which n is an integer from 1 to 6), --C(CH 3 ) 2 --, --CH(CH 3 )--, --S--, --CH(CF 3 )--, --C(CF 3 ) 2 --, ##STR6## --O--Ar--O-- (in which Ar is an aryl group) or ##STR7## (in which Y is H of F) and R is an aliphatic saturated hydrocarbon group containing from 4 to 18 carbon atoms.
Claim 3
Dependent Claim
35 words
The composition of claim 1 wherein the tetracarboxylic tetraester represented by the general formula I is in an amount from 20 to 120 parts by weight per 100 parts by weight of the polyvinyl chloride.
Claim 4
Dependent Claim
36 words
The composition of claim 2 wherein the tetracarboxylic tetraester represented by the general formula I is incorporated in an amount from 30 to 100 parts by weight per 100 parts by weight of the polyvinyl chloride.
Claim 5
Dependent Claim
40 words
The composition of claim 1 wherein X is a member selected from the group consisting of --O--, --CH 2 ) n (in which n is an integer from 1 to 6), --C(CH 3 ) 2 -- and --CH(CH 3 )--.
Claim 6
Dependent Claim
31 words
The composition of claim 4 wherein X is a member selected from the group consisting of --O-- and --CH 2 ) n (in which n is an integer 1 or 2).
Claim 7
Dependent Claim
20 words
The composition of claim 1 wherein R is an aliphatic saturated hydrocarbon group containing from 4 to 12 carbon atoms.
Claim 8
Dependent Claim
20 words
The composition of claim 6 wherein R is an aliphatic saturated hydrocarbon group containing from 8 to 12 carbon atoms.
Claim 9
Dependent Claim
11 words
A body fluid preservation vessel comprising the composition of claim 1.
Claim 10
Dependent Claim
11 words
The vessel of claim 8 wherein the body fluid is blood.
Claim 11
Dependent Claim
8 words
A catheter comprising the composition of claim 1.
Claim 12
Dependent Claim
10 words
A blood transfusion set comprising the composition of claim 1.
Claim 13
Dependent Claim
10 words
An aqueous infusion set comprising the composition of claim 1.
Claim 14
Dependent Claim
9 words
A blood circuit comprising the composition of claim 1.
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) | 1988-12-23 | 1989-06-24 | 1989-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-23 | 1993-06-24 | 1993-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-23 | 1997-06-24 | 1997-12-24 | $7700.00 | Window Closed / Lapsed |