Radiation-curable liquid resin for secondary coating of lightwave guides

US5057587A · 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 16, 1988
• Grant date: Oct 15, 1991
• Expiry date: Dec 16, 2008

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01B3/40
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention provides a radiation-curable liquid resin useful as a secondary coating of lightwave guides. The resin is a reaction product of (meth)acrylic acid or glyceroldi (meth)acrylate or Pentaerythritoltri(meth)acrylate with a 2:1 addition compound of a diepoxide and an .alpha., .omega.-diol with a mean molecular weight between 600 and 3000, or, a reaction product of (meth)acrylic acid or -acid chloride or isocyanatoalkyl-(meth)acrylate with a conversion product of the 2:1 addition compound and a low-molecular monovalent alcohol (C.sub.1 to C.sub.10), a low-molecular bivalent alcohol (C.sub.2 to C.sub.4) or water, where the diepoxide is an aromatic diglycidylether and the .alpha.,.omega.-diol is an .alpha., .omega.-hydroxy-terminated polyoxyalkylene, an .alpha., .omega.-hydroxy-terminated polyester, an .alpha.,.omega.-hydroxy-terminated polybutadiene or an .alpha.,.omega.-hydroxy-terminated organo-functional polysiloxane.