Abstract
By using 4, 4′-bis-dimethylamino diphenylmethane (M1) which has good yield and simple synthetic process instead of 4, 4′-bis-dimethylaminobenzhydrol, chloranil, p-nitrosodimethylaniline and aromatic amines or phenols, the condensation-combination dyeing for vinylone was studied with following results:
Various shaded dyeings were obtained. In these dyeings, it is good to use M1 which dissolves dil. acetic acid of about pH 2. The non-ionic surface active agent is useful as the disperse agent. Salt-effect is not so strong, but the use of 2 valence metal salts is somewhat effective.
The mata chrome process is more desirable. This process has the action of the oxidizing agent and chrome mordant agent.
M1 does not react with aromatic amines or phenols but it reacts to form triphenyl methane dyes only in the presence of p-nitrosodimethylaniline, chroranil or oxidizer.
