Process for preparing antithrombogenic/antibiotic polymeric plastic materials
First Claim
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1. A process for producing plastic substrates having antithrombogenic and/or antibiotic properties without dissolving the substrate, characterized by(a) providing a dual organic solvent system, said dual organic solvent system comprising(1) a chlorofluorocarbon component, said chlorofluorocarbon component being a member selected from the group consisting of 1,1,2-trichloro-1,2,2-trifluoroethane;
- 1,2-difluoro-1,1,2,2-tetrachloroethane;
1,1-difluoro 1,2,2,2-tetrachloroethane, and mixtures thereof;
(2) a petroleum ether component; and
(3) the ratio of said chlorofluorocarbon component to said petroleum ether component being within the range of between about nine parts chlorofluorocarbon to one part petroleum ether and one part chlorofluorocarbon to one part petroleum ether;
(b) dissolving in said dual organic solvent system from said providing step a pre-formed quaternary ammonium antibiotic and/or antithrombogenic complex;
(c) immersing a plastic material in said dual organic solvent system containing said quaternary ammonium antibiotic and/or antithrombogenic complex from said dissolving step, said plastic material being non-dissolvable in said organic solvent system;
(d) removing in a first removing step said plastic material from said immersing step; and
(e) removing in a second removing step said solvent from said dissolving step;
(f) thereby providing a passively coated thin layer film of quaternary ammonium antibiotic and/or anticoagulant complex on said plastic surface.
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Abstract
An antithrombogenic/antibiotic plastic material prepared using an organic solvent system containing a specific chlorofluorocarbon compound and petroleum ether.
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Citations
14 Claims
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1. A process for producing plastic substrates having antithrombogenic and/or antibiotic properties without dissolving the substrate, characterized by
(a) providing a dual organic solvent system, said dual organic solvent system comprising (1) a chlorofluorocarbon component, said chlorofluorocarbon component being a member selected from the group consisting of 1,1,2-trichloro-1,2,2-trifluoroethane; - 1,2-difluoro-1,1,2,2-tetrachloroethane;
1,1-difluoro 1,2,2,2-tetrachloroethane, and mixtures thereof;(2) a petroleum ether component; and (3) the ratio of said chlorofluorocarbon component to said petroleum ether component being within the range of between about nine parts chlorofluorocarbon to one part petroleum ether and one part chlorofluorocarbon to one part petroleum ether; (b) dissolving in said dual organic solvent system from said providing step a pre-formed quaternary ammonium antibiotic and/or antithrombogenic complex; (c) immersing a plastic material in said dual organic solvent system containing said quaternary ammonium antibiotic and/or antithrombogenic complex from said dissolving step, said plastic material being non-dissolvable in said organic solvent system; (d) removing in a first removing step said plastic material from said immersing step; and (e) removing in a second removing step said solvent from said dissolving step; (f) thereby providing a passively coated thin layer film of quaternary ammonium antibiotic and/or anticoagulant complex on said plastic surface. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- 1,2-difluoro-1,1,2,2-tetrachloroethane;
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8. An antithrombogenic/antibiotic plastic material prepared by exposing a polymeric plastic material to a dual organic solvent system in which the polymeric plastic material is non-soluble;
- said dual organic solvent system having dissolved therein a pre-formed quaternary ammonium antibiotic and/or antithrombogenic complex, said organic solvent system consisting essentially of (1) a chlorofluorocarbon component, said chlorofluorocarbon component being a member selected from the group consisting of 1,1,2trichloro-1,2,2 trifluoroethane;
1,2-difluoro-1,1,2,2-tetra-chloroethane;
1,1-difluoro 1,2,2,2-tetrachloroethane, and mixtures thereof; and
(2) petroleum ether, wherein the ratio of said chlorofluorocarbon component to said petroleum ether being within the range of between about nine parts chlorofluorocarbon to one part petroleum ether and one part chlorofluorocarbon to one part petroleum ether, wherein said plastic material is exposed to said dual solvent system for a time sufficient to form a thin film of said complex on the surface of said plastic material, and wherein said dual solvent system is removed from said formed thin film. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- said dual organic solvent system having dissolved therein a pre-formed quaternary ammonium antibiotic and/or antithrombogenic complex, said organic solvent system consisting essentially of (1) a chlorofluorocarbon component, said chlorofluorocarbon component being a member selected from the group consisting of 1,1,2trichloro-1,2,2 trifluoroethane;
Specification