Patent ID: 7514477
Filing Date: 2009-04-07
Classification: A61L,B33Y,G03F,H04R

Abstract:
1. A biocompatible, low-viscosity, radiation-curable composition, for producing antimicrobial medical products, in particular earpieces, by means of positive-negative-positive production methods or stereolithography, containing: a) 20-75 wt. % of one or a plurality of monomeric/oligomeric urethane(meth)acrylates having an acrylate functionality of <4, viscosity <30 Pa s, and molecular weight <3500; b) 5-45 weight % of a monomeric or oligomeric dimethacrylate of bisphenol A or bisphenol F and or of a monomeric aliphatic or cycloaliphatic di(meth)acrylate having a viscosity <6 Pa s; c) 2.5-25 weight % of a cross-linking monomeric or oligomeric component, wherein the component contains 4 methacrylate and/or acrylate functionalities; d) 0-15 wt. % of one or a plurality of monofunctional (meth)acrylates; e) 0.01-5 wt. % of one or a combination of antimicrobial additives selected from the group consisting of antimicrobially active glass fillers and silver particles; f) 0.5-6 wt. % of one or a plurality of photoinitiators whose absorption is in the wavelength range of an ND:YVO g) 0-0.5 wt. % of one or a plurality of anaerobic inhibitors; h) 0-10 wt. % fillers; I) 0-5 wt. % coloring agents; and j) 0-5 wt. % conventional additives selected from the group consisting of ultraviolet stabilizers and flow agents, the proportion of components a) through j) together equaling 100 wt. %.