Bonding of Sequestering Groups to Cellulosic Fibres.

The stability of PAR-s-triazine* covalently attached to cellulose has been studied under alkaline and acidic conditions. Results indicate that the rate of hydrolysis is slower in alkaline than in acidic media. This difference is explained in terms of ketone formation via dissipation of residual chlorine in the s-triazinyl ring. In the case of alkaline hydrolysis it is proposed that the observed two-phase mechanism depends on structurally different PAR-s-triazine entities, whereas the glycosidically-bonded s-triazine moieties seem to be responsible for the rapid hydrolysis under acidic conditions. Finally, the stabilizing effect of the substitution of remaining chlorines in PAR-s-triazine with various nucleophiles is demonstrated.