Selected 2,2,6,6-tetramethyl-4-piperidinyl derivatives and their

Details Selected 2,2,6,6-tetramethyl-4-piperidinyl derivatives and their Selected 2,2,6,6-tetramethyl-4-piperidinyl derivatives and their

1984-08-27

1985-10-22

Kight, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

546187, 546193, 546203, 424 59, C08K 534, C07D25100

Patent

active

045489734

ABSTRACT:
A 2,2,6,6-tetramethyl-4-piperidinyl derivative having a formula comprising: ##STR1## wherein R.sub.1 is hydrogen, an alkyl or alkylene group having 1 to about 8 carbon atoms, or cycloalkyl or aryl groups having about 5 or 6 ring carbon atoms; R.sub.2 and R.sub.3 are individually selected from hydrogen, alkyl groups having 1 to about 8 carbon atoms, and cycloalkyl and aryl groups having about 5 or 6 ring carbon atoms; R.sub.4 is selected from hydrogen and alkyl groups having 1 to about 8 carbon atoms; and n is either 1 or 2.
These compounds are useful as UV light stabilizers in plastics and cosmetics (e.g. sunscreens).

REFERENCES:
patent: 4051142 (1977-09-01), Carlson
patent: 4064102 (1977-12-01), Hillard et al.
patent: 4115101 (1978-09-01), Carlson
patent: 4115396 (1978-09-01), Ursprung

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