Asymmetrical benzotriazolylphenols
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United States of America Patent
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-
Nov 1, 1994
Issued Date -
N/A
app pub date -
Nov 30, 1993
filing date -
May 5, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Provided are asymmetrical, ultraviolet stabilizers which are hydroxyphenyl benzotriazolylphenol compounds of the formula: ##STR1## wherein: R.sub.1 is C.sub.1 to C.sub.18 alkyl, C.sub.6 to C.sub.10 aryl, C.sub.7 to C.sub.16 arylalkyl, C.sub.1 to C.sub.12 alkoxy, C.sub.6 to C.sub.10 aryloxy, C.sub.7 to C.sub.16 arylalkoxy, cyclopentyl, cyclohexyl or cumyl; R.sub.2 is C.sub.1 to C.sub.18 alkyl, C.sub.6 to C.sub.10 aryl, C.sub.7 to C.sub.16 arylalkyl, C.sub.1 to C.sub.12 alkoxy, C.sub.6 to C.sub.10 aryloxy, C.sub.7 to C.sub.16 arylalkoxy, cyclopentyl, cyclohexyl or cumyl; R.sub.1 is different from R.sub.2 ; and X is selected from the group consisting of hydrogen, halogen, C.sub.1 to C.sub.12 alkyl, and C.sub.1 to C.sub.12 alkoxy. The invention also pertains to a process for their preparation and stabilized polymer blends containing the stabilizers.
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