Effect of Dispersing Agents and Substitution on the Dyeing and Spectroscopic Properties of Disperse Dyes.

摘要

A number of inmm disperse dyes ~we prepared and mifled with different dispersing in a 6aIy di~i~d Iwm as d~eruiom. The average pusticle size of all dispersions were~ be~ i~ frafl dyes atudied. The efficiencies of dispersing agents wed were in erd.: Loe> Berol > Tasnol > Monolans. Low conoentratios. of Tamol were z~sdfr Si type of dyes as compared to S2 type. The capability to witlutand high temperature (130C) Axing dyeing was detennined by the change in average puatide size which increased aft. healing but remained under 1 ~un except for Berol which showed no remarkable changes in particle size. The fastness properties studied should higher values for A2-D2 series which have cymmo-ethyl group an their coupling component than AI-DI series with hydroxyl group in their ~scture. On the whole fastness value to wash, light and heat of basic dyes Si (3-4) and S2 (4-4.5) series increased with the introduction of electron withdrawing groups in the dye stnacture and remained around 5. The effect of substitution also showed bathochromic and hypsochromic shift from 8 to 25 mu. The effect of dispersants on the colour properties of dyes studied were an order:Ugninsuiphonate > Tamol > Monolan >Berol. All the dyes showed a good co-relationship between the data obtained during these investigations.