| 摘要 |
The compounds of the formula (I) wherein R<SUB>1 </SUB>is hydrogen, C<SUB>1</SUB>-C<SUB>8</SUB>alkyl, -O, -OH, -CH<SUB>2</SUB>CN, C<SUB>1</SUB>-C<SUB>13</SUB>alkoxy, C<SUB>2</SUB>-C<SUB>16</SUB>alkoxy substituted by -OH; C<SUB>5</SUB>-C<SUB>12</SUB>cycloalkoxy, C<SUB>3</SUB>-C<SUB>6 </SUB>alkenyl, C<SUB>7</SUB>-C<SUB>9 </SUB>phenylalkyl unsubstituted or substituted on the phenyl by 1, 2 or 3 C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl; or C<SUB>1</SUB>-C<SUB>8 </SUB>acyl; R<SUB>2 </SUB>is hydrogen or methyl; R<SUB>3 </SUB>and R<SUB>4 </SUB>are hydrogen or methyl; X is C<SUB>2</SUB>-C<SUB>20</SUB>,alkylene or a group of the formula (II-a-1) (II-a-2) (II-a-3) (II-b-1) (II-b-2) or (II-b-3) and Y is C<SUB>5</SUB>-C<SUB>12</SUB>cycloalkyl, C<SUB>5</SUB>-C<SUB>12</SUB>cycloalkyl substituted by 1, 2 or 3 C<SUB>1</SUB>-C<SUB>4 </SUB>alkyl; or a group of the formula (III) wherein R<SUB>1 </SUB>R<SUB>2</SUB>, R<SUB>3 </SUB>and R<SUB>4 </SUB>are as defined above, are suitable as B-nucleating, light stabilizing agents for polypropylene resins. |
