Patent ID: 9585985
Date: 2017-03-07
CPC Classifications: A61F,A61K,A61L,B41J,D01D,Y10T

Claim:
1. A method for coating with a biopolymer, which comprises coating the surface of a synthetic polymer with a solution of a biopolymer dissolved in a solvent comprising an organic fluorine compound to prepare a composition, whereby the surface of the synthetic polymer is partially dissolved by the organic fluorine compound, wherein: the synthetic polymer is a polymer which is used as medical material and is embedded within a living organism; in the composition, the ratio of the biopolymer to the synthetic polymer continuously decreases depending on the depth from a surface of the composition; the surface of the synthetic polymer is coated with the biopolymer without causing chemical changes due to introduction of chemical bonds; the biopolymer is gelatin or albumin; the organic fluorine compound is 1,1,1-hexafluoro-2-propanol, trifluoroethanol, hexafluoroacetone, trifluoroacetic acid, or pentafluoropropionic acid; and the synthetic polymer contains at least one selected from the group consisting of polylactic acid, polyglycolic acid, polyethylene terephthalate, and polyurethane.