Patent EP0030822A2 successfully refreshed from Google Patents.
EP0030822A2
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EP
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Synthetic absorbable surgical devices of polyester amides and process for making them
Assignee: 3M Co
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Filing: 1980-12-03
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Granted: —
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Expires: 2000-12-03
Abstract
Abstract A body-adsorbable polymeric material for surgical implantation which is a condensation product of reacting a diamine with lactic or glycolic acid to form a diamidediol which is then reacted with a bischloroformate or a compound selected from the group consisting of dicarboxylic acids, methyl and ethyl esters of dlcarboxylic acids, diacidchlorides, and anhydrides of a dicarboxylic acid. The polymeric material has a high degree of softness and flexibility and it is useful as synthetic absorbable surgical sutures.
Inventors
- 👤 Thomas H. Barrows
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 05:12
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/44; A; A61; A61L; A61L17/00; A61L17/06; A61L17/10; A61L17/105; A61L27/00; A61L27/14; A61L27/18
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
147 words
A body-absorbable polymeric surgical material characterized by a plurality of units of the general formula: in which R 1 is hydrogen or methyl; R 3 and R 5 may be identical or different and are selected from the group consisting of the following, which may be linear or branched alkylene, alkylene having 1 or 2 nonadjacent catenary oxygen or sulfur atoms, and alkenylene; cycloalkylene and arylene; said members of the group having up to 25 carbon atom in the cyclic compounds and from 2 to 25 carbon atoms in the non-cyclic compounds; R 2 and R 4 are hydrogen or alkyl having 1 to 4 carbon atoms or R 2 and R 4 together are linear or branched alkylene having one to four carbons forming with N-R 3 -N a heterocyclic group having 5 or 6 ring atoms; and a and b are independently zero or one.
Claim 2
Dependent Claim
147 words
A body-absorbable polymeric surgical material characterized by a plurality of units of the general formula: in which R 1 is hydrogen or methyl; R 3 and R 5 may be identical or different and are selected from the group consisting of the following, which may be linear or branched alkylene, alkylene having 1 or 2 nonadjacent catenary oxygen or sulfur atoms, and alkenylene; cycloalkylene and arylene; said members of the group having up to 25 carbon atom in the cyclic compounds and from 2 to 25 carbon atoms in the non-cyclic compounds; R 2 and R 4 are hydrogen or alkyl having 1 to 4 carbon atoms or R 2 and R 4 together are linear or branched alkylene having one to four carbons forming with N-R 3 -N a heterocyclic group having 5 or 6 ring atoms; and a and b are independently zero or one.
Claim 3
Dependent Claim
24 words
The body-absorbable polymeric surgical material of claim 1 further characterized by the feature that a and b are zero and R 5 is ethylene.
Claim 4
Dependent Claim
36 words
The body-absorbable polymeric surgical material of claim 2 further characterized by the feature that R 1 , R 2 , and R 4 are hydrogen and R 3 is a mixture of 1,12-dodecamethylene and 1,12-(4,9-dioxadodecam- ethylene).
Claim 5
Dependent Claim
32 words
The body-absorbable polymeric surgical material of any one of claims 1 to 3 further characterized by the feature that said material has 10 to 100 segments of repeating units of said polymer.
Claim 6
Dependent Claim
26 words
The body-absorbable surgical material of claim 4 further characterized by the feature that said material has 30 to 50 segments of repeating units of said polymer.
Claim 7
Dependent Claim
29 words
The body-absorbable surgical material of any one of claims 1 to 5 further characterized by the feature that said material is in the form of at least one filament.
Claim 8
Dependent Claim
22 words
The body-absorbable surgical material of claim 6 further characterized by the feature that said filament is in the form of a suture.
Claim 9
Dependent Claim
60 words
A process for making a body-absorbable polymeric surgical material of claim 1 which comprises the steps of: reacting a diamine with lactic or glycolic acid to form a diamidediol; and reacting said diamidediol with a bischloroformate or a diacid compound which is selected from dicarboxylic acids, methyl and ethyl esters of dicarboxylic acids, diacidchlorides, and anhydrides of a dicarboxylic acids.
Claim 10
Dependent Claim
17 words
The process of claim 8 further characterized by the feature that said diacid compound is succinyl chloride.
Claim 11
Dependent Claim
26 words
The process of either of claims 8 and 9 further characterized by the feature that said diamidediol is a mixture comprised of 1,12-di(hydroxyacetamido)-4,9-dioxadodecane and 1,12-di(hydroxyaceta- mide)dodecane.
Claim 12
Independent Claim
26 words
The method of any one of claims 8 to 10 further characterized by the feature that said diamine is one or both of 1,12-dodecanediamine and 4,9-dioxadodecane-1,12-diamine.
Claim 13
Dependent Claim
32 words
The process of any one of claims 8 to 11 further characterized by the feature that said diamidediol is placed in a solvent prior to reacting with said compound or said bischloroformate.
Claim 14
Dependent Claim
24 words
The process of claim 12 further characterized by the feature that said solvent is selected from the group consisting of chlorobenzene, 1,1,2-trichloroethane and 1,4-dioxane.
Claim 15
Dependent Claim
27 words
The process of either of claims 13 and 14 further characterized by an additional step of removing said solvent after reacting with said compound or said bischloroformate.
References Cited (Backward Citations)
No citation records indexed.
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