ULTRAVIOLET CURABLE COATING COMPOSITIONS CONTAINING ULTRAVIOLET CURABLE ADDITIVE

摘要

Radiation-curable liquid coating compositions which comprise polymerizable ethylenically unsaturated material containing a major weight proportion of preferably liquid polyacrylate or polymethacrylate, preferably containing at least 2.4 acrylate or methacrylate groups per molecule to provide a cured coating which is relatively hard, this composition being substantially free of volatile inert organic solvent, and from 0.1% to 2.5% of a silicone dicarbinol diurethane diacrylate or dimethacrylate in which the carbinol groups are carried by an ethoxylate or propoxylate constituting from 30% to 70% of the silicone. This modification provides improved wetting and surface lubricity while retaining hardness as the silicone diacrylate participates in the radiation cure. The preferred cures are with ultraviolet light, and this requires the presence of a photoinitiator.