Primary coatings for optical glass fibers including poly(carbonate-urethane) acrylates

US5219896A · kind A · utility

Assignee

• STAMICARBON B.V. · NL

Inventors

• Clive J. Coady · Bartlett, US
• Erwin S. Poklacki · Arlington Heights, US
• John M. Zimmerman · Crystal Lake, US
• Timothy E. Bishop · Algonquin, US
• John L. Derer · Des Plaines, US

Key dates

• Filing date: Mar 27, 1992
• Grant date: Jun 15, 1993
• Expiry date: Mar 27, 2012

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/92
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

Photocurable liquid coating compositions adapted to provide primary coatings for optical glass fibers are disclosed. These compositions comprise polycarbonate-based acrylate-terminated polyurethane, an acrylate of an unsubstituted or C.sub.1 -C.sub.10 alkyl substituted phenol that is alkoxylated with a C.sub.2 -C.sub.4 alkylene oxide and at least one alkylacrylate having a T.sub.g below about -45.degree. C. Films produced from these ultraviolet light curable compositions are flexible and possess good water resistance and good wet adhesion.