Synthesis And Properties Of Electrolyte-resistance Thickener

In most cases, the right amount of electrolyte should be added to textile printingpaste to guarantee the quality of printed pattern. But, most of the synthetic thickenersold in the market has poor electrolyte-resistance. This subject is aimed at preparingelectrolyte-resistance thickener. Thickener with good electrolyte-resistance performancewas prepared by inverse emulsion polymerization. Then it was applied in the textileprinting.Electrolyte-resistance thickener N was prepared in inverse emulsionpolymerization using N-vinyl pyrrolidone as functional monomer to improve the abilityof electrolyte-resistance, acrylic acid as main monomer, using N,N-methylenebisacrylamide as cross-linker, using kerosene as solvent,span-80as emulsifier,potassium persulfate, ammonium persulfate and sodium hydrogen sulfite as initiatorsystem,tween-80as phase emulsifier. Experiments showed that the mixed reactionsolution was regulated around6.5, the amount of cross-linker was0.14%of themonomer, using kerosene as solvent and the amount ratio of it with the monomer was0.8:1, amount of emulsifier was14%of kerosene, amount of N-vinyl pyrrolidone was0.9%of the monomer, reaction temperature was65℃,the viscosity of the original pastecontaining3%electrolyte-resistance thickener N was11549mpa.s, water retention was0.3cm/15min，PVI value was0.26, the surface color yield of reactive dye printedfabrics were above12，the degree of uneven color below0.104%，the penetration ratewere above67%，the removal rate of paste were above73%，the fastness to dry were4~5and wet rubbing of the printed fabric were3~4.In a word, the comprehensiveproperties were fine.Electrolyte-resistance thickener CHT was prepared in inverse emulsionpolymerization using chitosan modified by maleic anhydride as functional monomer to improve the ability of electrolyte-resistance, acrylic acid as main monomer, usingN,N-methylene bisacrylamide as crosslinker, using kerosene as solvent,span-80asemulsifer, potassium persulfate,ammonium persulfate and sodium bisulfite as initiatorsystem,tween-80as phase emulsifer. Experiments showed that when the mass ratio ofchitosan and maleic anhydride was1:5, reaction time was15h, the amount of modifiedchitosan and phase emulsifier were1.1%and14%of the amount of monomer. Theviscosity of the original paste containing3%electrolyte-resistance thickener was9533.7mpa.s, water retention was0.3cm/15min, PVI value was0.27, the surface color yield ofdispersed dye printed fabrics were above10，the degree of uneven color below0.121%，the penetration rate were above20%，the removal rate of paste were above68%，thefastness to dry were4~5and wet rubbing of the printed fabric were3~4.In a word, thecomprehensive properties were fine.