The Synthesis And Application Of Non-formaldehyde Fixing Agent

In recent years, with the development of textile, people pay more and more attention to thesafety and environmental protection of textiles. At the same time,the colour fastness of textiles hasalso been given more and more attention.because its bright color, low cost, economy, etc.,Reactive dyes have been widen used. however the soaping and rubbing fastness of the fabricsdyed with which is still relatively poor, so the deep color fabric dyed with reactive dyes generallyneed fixing processing.Polyamine fixing agent is a kind of cationic fixing agent, is made of organic amine andepichlorohydrin condensation reaction to obtain, which can form difficult or insoluble lake in thefibre with anionic dyes, having solid color effect by closing water soluble groups. In addition, themolecular structure of the reactive group can crosslink reaction with the hydroxyl and amino ofthe fiber and dye, so that the dyes in the fiber is fixed more firmly.This topic has prepared a polyamine formaldehyde-free fixing agent, which was synthesizedwith polyol amine and epichlorohydrin. Through the process of synthesis of single factor variableanalysis, the optimum synthesis conditions was: slowly adding polyol amine into epichlorohydrinwithin2h at room tempeture, heated to40℃for30mim,until the solution became transparent. andthen reacting at70℃for5h. finally, adding sodium hydroxide solution, the reaction was kept2h,adjust the pH to about2with formic acid. the molar ratio of polyol amine to epichlorohydrin was1:4.3, the molar ratio of sodium hydroxide to epichlorohydrin was1:3.This topic adopts the infrared spectroscopy (FT-IR) on the synthetic products werecharacterized, determined the synthetic products containing cationic reaction type polyaminefixing agent. And the synthesis of polyamine cationic fixing agent tested the basic properties, the fixing agent of the appearance is the red-brown liquid, the solid content is47.5%, Zeta electricpotential is1.27，the viscosity is medium and the centrifugal stability is good.olid color processing synthetic fixing agent for reactive dyes different dyed cotton fabric, thefixing agent for fixing the result is not reactive with the dye is substantially the same.the subject ofthe synthesis of polyamine type fixing agent fixing finished that reactive dyes dyeing of cottonfabrics, through the application of the optimization of process conditions, processing the optimalfinishing. The optimal finishing process for dyeing of cotton fabric was: dyed cottonfabricsâ†'immersed in liquid (the fixing agent dosage was4%(o.w.f.), bath ratio is15:1,50℃,20min)â†'drying(80℃). After it was applied to cotton fabrics dyed with reactive dyes, dry rubbingfastness increased from4level to4~5level, wet rubbing fastness increased from2level to3~4level, washing fastness increased from2~3level to4~5level. This synthesized fixing agent ismore obvious for wet rubbing and washing fastness of fabric dyed of reactive dyes.It has a goodapplication prospect.