Process for producing internal mold release agent for optical material, internal mold release agent for optical material, and polymerizable composition including the same
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United States of America Patent
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Jun 11, 2013
Grant Date -
Sep 6, 2012
app pub date -
Nov 4, 2010
filing date -
Nov 6, 2009
priority date (Note) -
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Abstract
The process for producing an internal mold release agent for an optical material of the present invention includes a step of heating, to a range of 80° C. to 140° C., a composition including (a) a phosphoric ester compound, and (b) an alcohol compound containing an aliphatic alcohol having 1 to 10 carbon atoms and/or aromatic alcohol, when the total amount of (a) and (b) is 100% by weight, the alcohol compound (b) is included in an amount equal to or more than 2.5% by weight.
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