Coating material for optical glass fiber

Abstract

Abstract PURPOSE:To improve the curability by mixing a urethane (meth)acrylate oligomer as a principal component with a (meth)acrylate compound having a long- chain aliphatic group as a reactive diluent, polyvinylpyridine as a cross-linking agent, benzophenone and an aliphatic amine as the components of a curing agent. CONSTITUTION:A (meth)acrylate oligomer having urethane crystals in the molecular skeleton and 2-5 methacryloyl groups in the molecule is used as a principal component. The oligomer is viscous at ordinary temp. and has 200-5,000 average mol.wt. A (meth)acrylate compound having a long-chain aliphatic group such as a long-chain alkyl group in the molecular skeleton is used as a reactive diluent. The compound is liq. at ordinary temp. and has 200-5,000mol.wt. The (meth)acrylate oligomer is uniformly mixed with the (meth)acrylate compound, polyvinylpyridine as a cross-linking agent for said two components, a benzophenone photopolymn. initiator and an aliphatic amine such as dimethylethanolamine as the components of a curing agent to obtain a coating material having 5,300cps viscosity at 25 deg.C.

Inventors

• 👤 Mitsuo Yoshihara
• 👤 吉原　三男
• 👤 Keichu Morikawa
• 👤 森川　敬忠

Bibliographic Details