| abstract |
The shape of fiber-containing material, in particular keratin-containing fibers such as human hair, can be obtained by using polymers which contain at least one structural unit of the formula (I), wherein A is a structural element of the polymer backbone, L is a direct bond or a linking molecule fragment which links the cycle of formula (I) to the structural element A, as well as - the radicals X 1 to X 6 are independently a Methanylylidengruppe, a nitrogen atom or a Halogenmethanylylidengruppe, additionally may form a fused aromatic or aliphatic five- or six-membered ring, two adjacent of the said radicals together with a ring binding of the six-membered ring of the formula (I) with the proviso that at least two of the radicals X 1 to X 6 represent a nitrogen atom and at least two of the radicals X 1 to X 6 represent a halomethanylylidene group and at most two radicals from X 1 to X 6 represent a methanylylidene group, fix. Compared with a treatment with conventional shape-fixing polymers, a more resistant shape fixation is obtained. The shape of the fibrous material, in particular, remains more resistant to washing and mechanical stress. |