Neutral-fixing Reactive Dyes for Cotton. Part 1 – Synthesis and Application of Quaternised S-Triazinyl Reactive Dyes

A number of different tertiary amines have been employed to prepare the corresponding quaternised triazines from a selected monochloro-s-triazine reactive dye. Preparation conditions have been established along with suitable analytical methods. The reactivity of the quaternised dyes with cellulose has been determined, special attention being paid to neutral fixation at high temperatures (100 °C). Good neutral fixation was achieved with all the tertiary amine derivatives studied. In the case of the nicotinamide derivative an anomalous reaction involving ring opening was noted; this reaction led to the formation of aminotriazine rather than the expected hydroxytriazine