Stabilization of liquid radiation-curable compositions against undesired premature polymerization
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United States of America Patent
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Jul 21, 1998
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app pub date -
Mar 6, 1996
filing date -
Mar 13, 1995
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Abstract
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.
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