초록 ▼

The invention relates to a process for stabilizing a liquid radiation-curable composition comprising a cationically polymerizable compound and a photoinitiator for cationic polymerization against premature commencement of the polymerization, in which a basic ion exchanger is brought into contact wit

The invention relates to a process for stabilizing a liquid radiation-curable composition comprising a cationically polymerizable compound and a photoinitiator for cationic polymerization against premature commencement of the polymerization, in which a basic ion exchanger is brought into contact with the composition, at least for a certain time. The ion exchanger is preferably removed before commencement of the radiation curing, at least from the part of the radiation-sensitive composition which comes into contact with the radiation. The process is particularly suitable for stabilizing stereolithography baths in extended use against an undesired increase in viscosity.

대표청구항 ▼

[ What is claimed is:] [1.] In a process for the production of three-dimensional articles in a stereolithographic bath which process comprises the step of sequentially irradiating a plurality of layers of a liquid radiation-curable composition comprising a cationically polymerizable compound and a p

[ What is claimed is:] [1.] In a process for the production of three-dimensional articles in a stereolithographic bath which process comprises the step of sequentially irradiating a plurality of layers of a liquid radiation-curable composition comprising a cationically polymerizable compound and a photoinitiator for cationic polymerization, the improvement of stabilizing said composition in said stereolithographic bath against a premature commencement of the polymerization associated with an unintended increase of the viscosity of the composition during the time period of its use comprising bringing a basic ion exchanger material into contact with said composition, for a time sufficient to effect said stabilization.