Mixed 2,2,6,6-tetramethyl piperidinyl carboxylic acid ester and amide light stabilizers and stabilized synthetic polymers.

摘要

Mixed light stabilizers for synthetic polymers are provided having the formula
<Chemistry id="chema01" num="0001"><Image id="ia01" he="27" wi="69" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein:
<UnorderedLists id="ula01" listStyle="none"><ListItem>R is a polyvalent group selected from the group consisting of aliphatic hydrocarbon groups having from one to about twenty carbon atoms, cycloaliphatic hydrocarbon groups having from three to about sixteen carbon atoms and aromatic hydrocarbon groups having from six to about thirty carbon atoms; such groups substituted with from one to about six groups selected from the group consisting of hydroxy, acyloxy, and halogen; and N(C<Sub>n1</Sub>, H<Sub>2n1</Sub>)<Sub>3</Sub> where n<Sub>i</Sub> is a number from one to five;</ListItem><ListItem>R<Sub>1</Sub> is selected from the group consisting of hydrogen, oxyl, alkyl, epoxy alkyl and hydroxy alkyl having from one to about twelve carbon atoms, alkyl aryl having from six to about eighteen carbon atoms, and acyl having from two to about twelve carbon atoms;</ListItem><ListItem>R<Sub>2</Sub> is selected from the group consisting of alkyl and alkenyl having from eight to about thirty carbon atoms;</ListItem><ListItem>R<Sub>3</Sub> is lower alkyl having from one to about six carbon atoms;</ListItem><ListItem>X is
<Chemistry id="chema02" num="0002"><Image id="ia02" he="24" wi="62" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry></ListItem><ListItem>V is -O- or -
<Chemistry id="chema03" num="0003"><Image id="ia03" he="12" wi="8" file="IMGA0003.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>where R<Sub>4</Sub> is hydrogen or R,;</ListItem><ListItem>m is a number from 0 to 6; and</ListItem><ListItem>n is a number from 3 to 6.</ListItem></UnorderedLists>

The mixture comprises from about 10 to about 60% by weight of compounds wherein m is 0, and from about 90 to about 40% by weight of compounds wherein m is from 1 to 6.