Polyethylenimine copolymer compositions and methods to enhance antiviral and antibacterial properties of medical devices and medical tools
View Patent ↗The present invention offers compositions and methods of infusing antibacterial and antiviral polyethylenimine compounds into materials conventionally used for medical devices and medical tools, including such materials as vinyl, polyvinylchloride, latex, rubber, silicone and plastic materials, and thereby enhancing the safety and antiviral properties of such medical equipment.
1 . An antiviral medical device material, comprising:
a cationic polymeric space-charge electret material with antiviral properties bonded to a medical device material, wherein the cationic polymer is natural, semi-synthetic, or synthetic;
further wherein the cationic polymer has a linear, branched, hyper-branched or dendrimer-like structure and the cationic polymer comprises at least cationic bearing group located in the backbone or side chain of the cationic polymer; and
wherein the medical device material is vinyl, polyvinylchloride, latex, rubber, silicone, or plastic.
2 . The antiviral medical device material of claim 1 , wherein the cationic polymer is selected from the group of PEI, linear polyethylenimine, branched polyethylenimine, gelatin, chitosan, cationic peptides, cationic cyclodextrin, cationic dextran, cationic cellulose, polylysine, polyamidonamine, poly(amino-co-ester)s, or poly[2-(N,N-dimethylamino) ethyl methacrylate] polyethylenimine.
3 . The antiviral medical material of claim 2 , wherein the cationic polymer is polyethylenimine.
4 . The antiviral medical material of claim 3 , wherein the space charge electret material comprises 0.195%-10% by weight polyethylenimine cationic polymer.
5 . The antiviral medical device material of claim 4 , wherein the space-charge electret material comprises substantially 2%-8% by weight polyethylenimine cationic polymer.
6 . The antiviral device material of claim 1 , wherein the material has a substantially uniform surface charge with a minimum average positive surface charge of 2-35 nC cm −2 .
7 . The antiviral medical device material of claim 1 , wherein the material retains antiviral efficacy upon weaving, bonding, blending or mixture in a volume with other, non-antiviral materials.
8 . The antiviral device material of claim 1 , wherein the material is formed as a flexible hollow tubular structure.
9 . A method of manufacturing an antiviral medical device material, comprising:
dissolving a space-charge electret material in a suitable solvent to form a space-charge electret material/solvent mixture, wherein the concentration of the space-charge electret material in the solvent is 0.195%-10% by weight;
mixing the space-charge electret with silicone material on a silicone gel plate;
resting the mixture for 0-24 hours; conditioning the mixture for 0-24 hours at temperatures under 60 C; then extricating and removing the silicone gel plate, resulting in antiviral medical device material.
10 . The method of claim 9 , wherein the space-charge electret material is dissolved in a solvent with no added salt.
11 . The method of claim 10 , wherein the solvent is water.
12 . The method of claim 10 , wherein the solvent is methanol.
13 . The method of claim 9 , wherein the space-charge electret material is 0.195%-10% by weight polyethylenimine.
14 . The method of claim 13 , wherein the space-charge electret material is substantially 2%-8% by weight polyethylenimine.
15 . The method of claim 9 , wherein the resultant antiviral medical material has a substantially uniform surface charge with a minimum average positive surface charge of 2-35 nC cm −2 .
16 . The method of claim 15 , wherein the antiviral medical material is formed as a flexible hollow silicone tube.