Polycarbonate mixtures in optical applications

US5132154A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Uwe Westeppe · Mettmann, DE
• Gunther Weymans · Leverkusen, DE
• Dieter Freitag · Krefeld, DE
• Karsten-Josef Idel · Krefeld, DE

Key dates

• Filing date: May 31, 1990
• Grant date: Jul 21, 1992
• Expiry date: May 31, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/31507
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An article for an optical application is disclosed comprising PA0 a) about 0.1 to 99.9 wt. % of a thermoplastic, aromatic polycarbonate resin containing carbonate structural units corresponding to (Ia): ##STR1## wherein R.sup.1 and R.sup.2 independently represent hydrogen, halogen, C.sub.1 -C.sub.8 alkyl, C.sub.5 -C.sub.6 cycloalkyl, C.sub.6 -C.sub.10 aryl or C.sub.7 -C.sub.12 aralkyl; m represents an integer of from 4 to 7; PA1 R.sup.3 and R.sup.4, which are selected individually for each X, independently represent hydrogen or C.sub.1 -C.sub.6 alkyl; and PA1 X represents a carbon atom; PA0 provided that R.sup.3 and R.sup.4 both represent alkyl on at least one X atom; and PA0 b) from 99.9 to 0.1 wt. % of at least one thermoplastic polycarbonate other than component (a).