Sedimentation stabilized radiation-curable filled compositions
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United States of America Patent
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Jan 23, 2001
Issued Date -
N/A
app pub date -
Jul 14, 1998
filing date -
Jul 21, 1997
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Abstract
The present invention relates to a process for the production of three-dimensional articles by stereolithography using a radiation-curable composition containing a mixture of at least one cationically polymerizable compound and/or at least one free radical polymerizable compound, at least one filler material, at least one photoinitiator for cationic and/or radical polymerizations and at least one antisedimentation agent. An organic viscosity stabilizer material soluble in the base resin may optionally be brought into contact with the composition. A filler material can be introduced in the composition in an effective amount sufficient to at least delay or prevent a significant viscosity increase. The present invention also relates to cured articles resulting from said processes and a process for preparing said compositions.
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