Color stabilization of hydroquinone hydroxyethyl ether products
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United States of America Patent
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Feb 7, 2006
Grant Date -
Apr 21, 2005
app pub date -
Jun 30, 2004
filing date -
Jul 2, 2003
priority date (Note) -
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Abstract
The present invention relates to the color stabilization of hydroquinone hydroxyethyl ethers by phosphite compounds containing the bis-cyclic structure of spiro phosphites, both rings being attached to the same tertiary carbon atom in the phosphite molecule.
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