Radiation-curable liquid resin for secondary coating lightwave guides

US5015709A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Siegfried Birkle · Höchstadt an der Aisch, DE
• Hans-Dieter Feucht · Renningen, DE
• Rainer Kamps
• Eva Rissel · Forchheim, DE

Key dates

• Filing date: Dec 19, 1988
• Grant date: May 14, 1991
• Expiry date: Dec 19, 2008

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/922
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a radiation-curable liquid resin for use as a secondary coating of lightwave guides which is a reaction product of (meth)acrylic acid or -acid chloride or isocyanatoalkyl-(meth)acrylate with a 1:2 addition compound of a diepoxide with a mean molecular weight.ltoreq.1000 and a short-chain .alpha.,.omega. -diol with a mean molecular weight.ltoreq.700 or with a 1:2 addition compound of a diepoxide with a mean molecular weight.ltoreq.400 and a monovalent aliphatic alcohol with a mean molecular weight.ltoreq.200, where the diepoxide is an aliphatic-aromatic or aromatic diglycidylether, an aliphatic or cycloaliphatic diepoxide or a silicon-organodiepoxide, and where the short-chain .alpha.,.omega. -diol is an .alpha..omega. -hydroxy-terminated polyoxyalkylene, an .alpha.,.omega. -hydroxy-terminated polyester, an .alpha.,.omega. -hydroxy-terminated polybutadiene, an .alpha.,.omega. -hydroxyterminated organo-functional polysiloxane or an .alpha.,.omega. -alkanediol with a mean molecular weight.ltoreq.200.