Radiation-resistant polycarbonates

US5464893A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Rick L. Archey · Baldwin, US
• Charles E. Lundy · Pittsburgh, US
• Aaron D. Meltzer · Anderson, US
• Harald Pielartzik · Pittsburgh, US
• Gerhard Fennhoff · Willich, DE
• Ralf Hufen · Duisburg, DE
• Klaus Kircher · Leverkusen, DE
• Rudiger Schubart · Wittlich, DE
• Richard Weider · Leverkusen, DE

Key dates

• Filing date: Mar 22, 1994
• Grant date: Nov 7, 1995
• Expiry date: Mar 22, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/37
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A thermoplastic molding composition stabilized against .gamma.-rays and its application for manufacture of medical equipment is disclosed. The composition contains an aromatic polycarbonate and (i) dialkyl and/or dicycloalkyl monosulfides or polysulfides in an amount of 0.001 to 5 weight %, and optionally (ii) aliphatic or cycloaliphatic monoalcohols or polyalcohols or their derivatives in an amount of 0.001 to 2 weight % said percent being relative to 100 weight % of aromatic polycarbonate.