| 摘要 |
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</=1000 and a short-chain alpha , omega -diol with a mean molecular weight</=700 or with a 1:2 addition compound of a diepoxide with a mean molecular weight</=400 and a monovalent aliphatic alcohol with a mean molecular weight</=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</=200.
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