Patent ID: 9572913
Date: 2017-02-21
CPC Classifications: A01N,A61L,A61P,C07C,Y10T

Claim:
1. A process for preparing a medical article, comprising the following steps: a) combining and admixing a polymeric or oligomeric active ingredient having biocidal activity that is obtainable by the polycondensation of a guanidine acid addition salt with a mixture of amines containing at least one diamine and/or triamine, wherein at least one amine is selected from the group consisting of with at least one plastic material to form a composition, wherein the at least one plastic material includes thermoplastic polyurethane, wherein the polymeric or oligomeric active ingredient is present in the composition in an amount ranging from 1% by weight to 4% by weight, wherein the polymeric or oligomeric active ingredient is incorporated into the plastic material, and; b) subjecting the composition obtained under a) to one or more shaping methods to form a medical article, wherein the polymeric or oligomeric active ingredient has a structure selected from the group comprising wherein HCl* means that the HCl is not covalently bonded, n is a natural number from 1 to 20, p, q and r are integers defining the preferred molar ratio of the structural fragments in the formulas, wherein the medical article exhibits a surface roughness that is lower than a surface roughness of a medical article comprising a composition that excludes the polymeric or oligomeric active ingredient.