4-hydroxyquinoline-3-carboxylic acid derivatives as light stabilizers
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United States of America Patent
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Feb 27, 2001
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N/A
app pub date -
Sep 3, 1998
filing date -
Sep 4, 1997
priority date (Note) -
Expired
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Abstract
The present invention relates to the use of compounds of the formula (I) ##STR1## where the substituents are as defined in the description as a stabilizer for organic material against the harmful effect of light, oxygen and heat.
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