Derivatives of alkyl-substituted 4-hydroxy-methyl-piperidine and use thereof as stabilizers.

摘要

Derivatives of 4-hydroxy-methyl-piperidine having general formula:
<Chemistry id="chema01" num="0001"><Image id="ia01" he="29" wi="56" file="IMGA0001.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>wherein: R<Sub>1</Sub>, R<Sub>2</Sub>, R<Sub>3</Sub> and R<Sub>4</Sub> may be alkyl or may form, with the carbon they are bound to, a cycloalkyl group or the group
<Chemistry id="chema02" num="0002"><Image id="ia02" he="25" wi="34" file="IMGA0002.TIF" imgContent="chem" imgFormat="TIFF" inline="no" /></Chemistry>with R<Sub>6</Sub>, R<Sub>7</Sub>, R<Sub>8</Sub> and R<Sub>9</Sub> being hydrogen or alkyl;
<UnorderedLists id="ula01" listStyle="none"><ListItem>R<Sub>5</Sub> may be H, alkyl, aryl, alkenyl, etc.;</ListItem><ListItem>Y may be an organic or inorganic group or atom having a</ListItem><ListItem>valence from 1 to 4 and</ListItem><ListItem>n is an integer from 1 to 4.</ListItem></UnorderedLists>

The use of the derivatives of the alkyl-substituted 4-hydroxy-methyl-piperidine of formula (I) as stabilizers of polymeric substances, and polymeric compositions stabilized with said piperdine derivatives.

This invention relates to new derivatives of alkyl-substituted 4-hydroxy-methyl-piperidine, to the use thereof as stabilizers of polymeric substances usually subject to worsening owing to thermal and/or photo-oxidation, and to the polymeric compositions stabilized with said derivatives.