发明授权
US4683171A Laminate and method for its preparation 失效
层压板及其制备方法

Laminate and method for its preparation
摘要:
A transparent laminate made of a transparent hard material having a soft synthetic resin layer on its surface, wherein the soft synthetic resin layer has, at its exposed surface side, a surface of cross-linked polyurethane type resin having a self-healing property with the surface reformed by impregnating an addition-polymerizable unsaturated compound into the cross-linked polyurethane resin surface and polymerizing the impregnated compound.
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