| abstract |
The invention relates to cholesteric copolyisocyanates with repetitive units of formulae: a), b) and optionally, c), wherein R<1> represents a chiral aliphatic or aromatic radical, R<2> represents a cross-linkable radical and R<3> represents an achiral radical. The invention also relates to polymers obtained by cross-linking the inventive copolyisocyanates with a polymerizable solvent, and to pigments containing the inventive polymers. |