Patent ID: 11904581
Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTE
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 9:
10. The bifunctional film as claimed in claim 1, further comprising an intermediate layer between the anti-adhesion layer and the attachment layer,
wherein the intermediate layer comprises a second polymer mixture, and the second polymer mixture comprises:
a second hydrophobic polymer which is at least one hydrophobic polymer selected from the group consisting of: polycaprolactone, polylactic acid, poly(lactic-co-glycolic acid), poly(glycolic acid), polyhydroxybutyrate, polydioxanone, poly(propylene fumarate), polyanhydrides, polyacetals, poly(ortho esters), polycarbonates, polyurethanes, polyphosphazenes and polyphosphoester; and
a third hydrophilic polymer which is at least one hydrophilic polymer selected from the group consisting of: gelatin, a modified gelatin, alginate, polyvinyl alcohol, carboxymethyl cellulose, polyethylene glycol, a derivative of polyethylene glycol, collagen, demineralized bone matrix, bone morphogenetic protein, albumin, chitosan, fibrin, polyoxyethylene and polyvinylpyrrolidone, and
wherein in the second polymer mixture, a weight ratio of the second hydrophobic polymer to the third hydrophilic polymer is 1:0.005-5.