Acryiic acid copolymer/montmorillonite nanocomposite thickener, preparation method and application

Abstract

The invention discloses an acryiic acid copolymer/montmorillonite nanocomposite thickener, a preparation method and application. The thickener is prepared from, by weight, 33-67 parts of acrylic acid, 33-67 parts of acrylamide, 8.8-17.8 parts of sodium hydroxide, 3-4 parts of sodium base montmorillonite clay(Na-MMT), 46-60 parts of deionized water, 3 parts of 0.5% ammonium persulfate solution, 1-3 parts of 0.5% anhydrous sodium sulfite solution. The preparation method comprises the steps that 1, raw materials are prepared; 2, instantaneous polymerization is performed; 3, a post treatment is performed. The thickener is a white particle, and is readily soluble in water, 2% of aqueous solution is translucent, the pH is 6-6.5, and the viscosity is 8.1-9.8 s (textile 3 # cup), the viscosity stability is 100%(under the conditions of 1%, 95 DEG C and 2 hours ). The thickener can be used for warp sizing, meets the slurry viscosity requirement of polyester sizing agent for the sizing of staple fibre yarn, and is good in the bubbleless property of the slurry.

Description

technical field [0001] The invention relates to an acrylic acid copolymer thickener and its preparation method and application. The thickener is used to thicken polyester emulsion to realize warp yarn sizing with polyester size as the main body, and belongs to the technical field of textile sizing. Background technique [0002] Polyester size is formed by polycondensation of polybasic acid and polyol. This type of polyester polymer contains water-soluble structural units and is water-dispersible; the long-chain structural units of its molecules are connected by ester bonds, which are easily broken by enzymatic hydrolysis, and have a higher molecular weight than conventional carbon-carbon main chain water-based polymers. Good biodegradability; polyol and polyacid monomers can be selected from a wide variety of sources and varieties, so polyester has the flexibility of adjustable performance and wide adaptability. The above advantages make polyester size rapidly used in short...

AI Technical Summary

Problems solved by technology

For this reason, we have tried a variety of existing textile sizing or auxiliaries, but none of them can meet the above requirements at the same time

For example, carboxymethyl cellulose contains a large amount of inorganic salts, which affects the hydration and dispersion of polyester pulp; guar gum or xanthan gum has poor viscosity stability; starch or modified starch must be used above 4% to achieve sizing Viscosity requirements, and viscosity stability is not high; high-viscosity polyacrylamide aqueous solution cannot be uniformly dispersed in the polyester slurry dispersion, and cannot pass through the filter screen of the slurry tank smoothly; the molecular weight of the acrylic thickener for printing is too high, and the polyester slurry Poor miscibility often causes slurry phase separation and roll sticking