| 摘要 |
The use of benzotriazole UV absorbers of formula (1), wherein A is a radical of formula (1a); (1b); or (1c); B is a radical of formula (1d); (1e); (1f), (1g); (1h); (1i); (1k); (1l); (1m); or (1n); R<SUB>1</SUB>, R<SUB>2</SUB>, R<SUB>3</SUB>, R<SUB>4</SUB>, R<SUB>5 </SUB>and R<SUB>6 </SUB>are each independently of the others hydrogen, C<SUB>1</SUB>-C<SUB>16</SUB>alkyl; C<SUB>5</SUB>-C<SUB>7</SUB>cycloalkyl; halogen; R<SUB>9 </SUB>is hydrogen, C<SUB>1</SUB>-C<SUB>12</SUB>alkyl; or C<SUB>5</SUB>-C<SUB>7</SUB>cycloalkyl; R<SUB>7</SUB>, R<SUB>8 </SUB>and R<SUB>10 </SUB>are each independently of the others hydrogen, C<SUB>1</SUB>-C<SUB>12</SUB>alkyl C<SUB>5</SUB>-C<SUB>7</SUB>cycloalky, C<SUB>1</SUB>-C<SUB>12</SUB>hydroxyalkyl; X is halogen; a radical of formula (1s); (1t); or (1u); sulfate, phosphate, lactate, citrate, tartrate; R<SUB>11 </SUB>is C<SUB>1</SUB>-C<SUB>12</SUB>alkyl; or C<SUB>5</SUB>-C<SUB>7</SUB>cycloalkyl; R<SUB>12 </SUB>and R<SUB>13 </SUB>are each independently of the other hydrogen; or C<SUB>1</SUB>-C<SUB>5</SUB>alkyl; x is from 0 to 10; and y is from 1 to 20; in the cosmetic treatment of human hair for protection against UV radiation is described.
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