Coupled benzotriazole and benzophenone UV absorbers
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United States of America Patent
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Dec 13, 1994
Issued Date -
N/A
app pub date -
May 19, 1994
filing date -
May 27, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Provided are ultraviolet stabilizers which are diphenylmethane compounds of the formula: ##STR1## wherein: R.sub.1 and R.sub.2 are independently C.sub.1 to C.sub.8 alkyl, cyclopentyl, cyclohexyl or cumyl; 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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