SYNERGISTIC INITIATOR COMPOSITIONS FOR THE VISIBLE LIGHT FABRICATION AND POSTCURE OF STEREOLITHOGRAPHIC OBJECTS

摘要

A liquid composition photopolymerizable with visible light comprises a photopolymerizable ethylenically unsaturated liquid which is polymerizable by free-radical polymerization containing, based on the weight of the photopolymerizable ethylenically unsaturated material contained therein: (1) from about 0.1 % to about 5 % of a photoreducible phthalein dye; (2) from about 0.5 % to about 10 % of an aliphatic tertiary amine; and (3) from about 1 % to about 8 % of a ketonic photoinitiator. This is a composition suitable for many purposes including coating operations and preferably a stereolithographic process.