US4495312A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin composition suitable for use in medical devices
Assignee: Sekisui Chemical Co Ltd
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Filing: 1983-03-11
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Granted: 1985-01-22
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Expires: 2003-03-11
Abstract
Abstract A resin composition comprising (a) a vinyl chloride/ethylene copolymer having an ethylene content in the range of 3 to 12% by weight, an average degree of polymerization in the range of 700 to 2900 and a ratio of weight average molecular weight to number average molecular weight in the range of from 2.5:1 to 5.5:1, (b) an ethylene/carbon monoxide/vinyl acetate copolymer, and (c) a glycerin ester of a specific epoxidized aliphatic carboxylic acid. This resin composition is suitable for making medical devices, especially bags for storing transfusion fluids, receptacles for storing blood, and tubes for a blood circuit in artificial kidneys.
Inventors
- 👤 Hiroyoshi Hata
- 👤 Seiichirou Honda
- 👤 Seiya Hosokawa
- 👤 Kazuhiko Kanki
- 👤 Toshiharu Matsumiya
- 👤 Kazuo Sakamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:31
CPC Classifications
G; G01; G01N; G01N23/00; G01N23/20; C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/06; C08K; C08K5/00; C08K5/04; C08K5/15; C08K5/151; C08K5/1515; C08L73/00
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
233 words
A resin composition comprising the following blend: (a) a vinyl chloride/ethylene copolymer having an ethylene content in the range of 3 to 12% by weight, an average degree of polymerization in the range of 700 to 2900 and a ratio of weight average molecular weight to number average molecular weight in the range of from 2.5:1 to 5.5:1, (b) an ethylene/carbon monoxide/vinyl acetate copolymer, and (c) a glycerin ester of the following formula ##STR7## wherein X, Y and Z are identical or different and each represents a hydrogen atom or a residue of an epoxidized aliphatic carboxylic acid selected from the class consisting of ##STR8## in which R 1 , R 3 , R 4 , R 6 , R 7 and R 8 , independently from each other, represent a saturated or unsaturated, linear or branched divalent hydrocarbon group having 1 to 25 carbon atoms, and R 2 , R 5 and R 9 , independently from each other, represent a saturated or unsaturated, linear or branched monovalent hydrocarbon group having 1 to 25 carbon atoms, provided that X, Y and Z are not hydrogen atoms at the same time; said composition being such that before blending the ingredients of the resin composition, the ethylene/carbon monoxide/vinyl acetate copolymer is treated with a liquid which substantially dissolves acetic acid and in which the copolymer is substantially insoluble and the thus-treated copolymer is dried.
Claim 2
Dependent Claim
233 words
A resin composition comprising the following blend: (a) a vinyl chloride/ethylene copolymer having an ethylene content in the range of 3 to 12% by weight, an average degree of polymerization in the range of 700 to 2900 and a ratio of weight average molecular weight to number average molecular weight in the range of from 2.5:1 to 5.5:1, (b) an ethylene/carbon monoxide/vinyl acetate copolymer, and (c) a glycerin ester of the following formula ##STR7## wherein X, Y and Z are identical or different and each represents a hydrogen atom or a residue of an epoxidized aliphatic carboxylic acid selected from the class consisting of ##STR8## in which R 1 , R 3 , R 4 , R 6 , R 7 and R 8 , independently from each other, represent a saturated or unsaturated, linear or branched divalent hydrocarbon group having 1 to 25 carbon atoms, and R 2 , R 5 and R 9 , independently from each other, represent a saturated or unsaturated, linear or branched monovalent hydrocarbon group having 1 to 25 carbon atoms, provided that X, Y and Z are not hydrogen atoms at the same time; said composition being such that before blending the ingredients of the resin composition, the ethylene/carbon monoxide/vinyl acetate copolymer is treated with a liquid which substantially dissolves acetic acid and in which the copolymer is substantially insoluble and the thus-treated copolymer is dried.
Claim 3
Dependent Claim
21 words
The resin composition of claim 1 wherein the vinyl chloride/ethylene copolymer has an ethylene content of 5 to 10% by weight.
Claim 4
Dependent Claim
45 words
The resin composition of claim 1 wherein the vinyl chloride/ethylene copolymer has an average degree of polymerization in the range of 1,000 to 2,500 and a ratio of weight average molecular weight to number average molecular weight in the range of from 2.3:1 to 5.2:1.
Claim 5
Dependent Claim
51 words
The resin composition of claim 1 wherein the ethylene/carbon monoxide/vinyl acetate copolymer is a copolymer produced by copolymerizing 1 part by weight of ethylene, 0.03 to 0.5 part by weight of carbon monoxide and 0.1 to 0.9 part by weight of vinyl acetate in the presence of a radical polymerization catalyst.
Claim 6
Dependent Claim
27 words
The resin composition of claim 1 wherein the ethylene/carbon monoxide/vinyl acetate copolymer has a weight average molecular weight in the range of about 100,000 to about 2,000,000.
Claim 7
Dependent Claim
21 words
The resin composition of claim 1 wherein the glycerin ester has an oxirane oxygen content of 5 to 10% by weight.
Claim 8
Dependent Claim
19 words
The resin composition of claim 1 wherein the glycerin ester has an iodine value of not more than 10.
Claim 9
Dependent Claim
62 words
The resin composition of claim 1 wherein the glycerin ester is selected from the group consisting of a triglyceride of 9-octadecenoic acid, 9,12-octadecadienic acid and 9,12,15-octadecatrienoic acid, a triglyceride of 13-docosenoic acid, 9-octadecenoic acid and 9,12,15-octadecatrienoic acid, a triglyceride of 9-octadecenoic acid and 9,12-octadecadienoic acid, a triglyceride of 9-octadecanoic acid and 9,12-octadecadienic acid, and a triglyceride of 9-octadecenoic acid and 9,12,15-octadecatrienoic acid.
Claim 10
Dependent Claim
11 words
The resin composition of claim 1 wherein said liquid is water.
Claim 11
Dependent Claim
45 words
The resin composition of claim 1 comprising (a) 100 parts by weight of the vinyl chloride/ethylene copolymer, (b) 1 to 180 parts by weight of the ethylene/carbon monoxide/vinyl acetate copolymer, and (c) 1 to 50 parts by weight of the glycerin ester of formula (I).
Claim 12
Dependent Claim
44 words
The resin composition of claim 10 comprising (a) 100 parts by weight of the vinylchloride/ethylene copolymer, (b) 10 to 130 parts by weight of the ethylene/carbon monoxide/vinyl acetate copolymer, and (c) 5 to 20 parts by weight of the glycerin ester of formula (I).
Claim 13
Dependent Claim
49 words
A process for preparing the resin composition of any one of claims 1 to 12, which comprises kneading in the molten state (a) the vinyl chloride/ethylene copolymer, (b) the ethylene/carbon monoxide/vinyl acetate copolymer and (c) the glycerin ester of formula (I) at a temperature of 110° to 180° C.
Claim 14
Dependent Claim
16 words
A medical device formed of the resin composition of any one of claims 1 to 12.
Claim 15
Dependent Claim
34 words
The medical device of claim 13 which is in the form of a catheter, a blood transfusion tube, a fluid transfusion tube, a blood bag, a transfusion fluid bag, or a blood circuit tube.
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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) | 1988-01-22 | 1988-07-23 | 1989-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-22 | 1992-07-23 | 1993-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-22 | 1996-07-23 | 1997-01-22 | $7700.00 | Window Closed / Lapsed |