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Acrylic acid copolymer/montmorillonite nanocomposite thickener, preparation method and use

A nano-composite, acrylic technology, applied in the direction of plant fibers, textiles, papermaking, fiber types, etc., can solve the problems of poor miscibility, non-uniform dispersion, and high molecular weight of acrylic thickeners, and achieve good compatibility.

Inactive Publication Date: 2018-08-07
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Sodium hydroxide 13.8 parts

[0022] Na-MMT 4.0 parts

[0023] Deionized water 50.0 parts

[0024] (2) Acrylic acid 52.0 parts

[0025] Acrylamide 48.0 parts

[0026] (3) 3.0 parts of 0.5% ammonium persulfate solution

[0027] (4) 3.0 parts of 0.5% anhydrous sodium sulfite solution

[0028] Weigh caustic soda and montmorillonite (Na-MMT, 300 mesh) according to the above formula (1), add water and stir well; weigh acrylic acid and acrylamide (2), stir well in the reaction kettle; slowly add the solution of (1) In the monomer liquid (2), stir well, and the temperature of the system after neutralization exotherm is 55°C; pour the above mixed liquid into a bottom area of ​​1.0 m 2 (square meter), 0.5m high, flat-bottomed rectangular open container lined with polytetrafluoroethylene, add ammonium persulfate solution (3), stir well; then add sodium bisulfite solution (4), the total water content of the system 32.2%; start to react about 3 minutes after stirring well...

Embodiment 2

[0031] (1) Sodium hydroxide 17.8 parts

[0032]Na-MMT 3.0 parts

[0033] Deionized water 52.0 parts

[0034] (2) Acrylic acid 67.0 parts

[0035] Acrylamide 33.0 parts

[0036] (3) 3.0 parts of 0.5% ammonium persulfate solution

[0037] (4) 3.0 parts of 0.5% anhydrous sodium sulfite solution

[0038] By the technical process of above formula and embodiment 1. The difference is that the system is 55°C after neutralization and the total water content of the system is 32.4%. After adding sodium sulfite solution and stirring well, the reaction starts about 2 minutes, and the reaction lasts for about 3 minutes. Knead in a kneader and vacuum remove free water for 40 minutes. .

[0039] The product is yellowish, with fine foaming, moisture content of 7.8%, soluble in water, colorless and translucent aqueous solution, 2% solution viscosity of 8.1s (3# textile cup), pH=6.0; mixed with polyester size, anion or Non-ionic smoothing agent and penetrating agent are boiled at the same...

Embodiment 3

[0041] (1) Sodium hydroxide 8.8 parts

[0042] Na-MMT 3.0 parts

[0043] Deionized water 46.0 parts

[0044] (2) Acrylic acid 33.0 parts

[0045] Acrylamide 67.0 parts

[0046] (3) 3.0 parts of 0.5% ammonium persulfate solution

[0047] (4) 3.0 parts of 0.5% anhydrous sodium sulfite solution

[0048] By the technical process of above formula and embodiment 1. The difference is that the temperature of the system is 40°C after neutralization and exothermic, heated to 50°C with a water bath, the total water content of the system is 31.7%, the reaction starts about 3 minutes after adding sodium sulfite solution and stirs, and the reaction lasts for 2 minutes.

[0049] The product is whiter, with less foaming and firm structure. The pulverizer needs high power. The water content is 4.5%. It is easily soluble in water. The aqueous solution is colorless and translucent. The viscosity of 2% solution is 9.2s (3# textile cup), pH=6.5 ; Simultaneous cooking with polyester size, ani...

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Abstract

The invention discloses an acrylic copolymer / montmorillonite nanocomposite thickener, a preparation method and an application. The raw material ratio of the thickener is 33-67 parts of acrylic acid, 33-67 parts of acrylamide, and sodium hydroxide in terms of weight. 8.8~17.8 parts, 3~4 parts sodium montmorillonite (Na-MMT), 46~60 parts deionized water, 3 parts 0.5% ammonium persulfate solution, 1~3 parts 0.5% anhydrous sodium sulfite solution; preparation method For: (1) raw material preparation; (2) instantaneous polymerization; (3) post-processing. The thickener of the present invention is white particles, easily soluble in water, translucent in 2% aqueous solution, pH 6~6.5, viscosity 8.1~9.8 s (textile 3# cup), viscosity stability 100% (1%, 95°C and 2 hours); it can be used for warp sizing to meet the sizing viscosity requirements of polyester sizing for sizing spun yarn, and the sizing has good foam-free performance.

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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/56C08F2/44C08F4/40D06M15/507D06M15/285D06M11/79D06M101/06
CPCC08F2/44C08F4/40C08F220/06C08F220/56D06M11/79D06M15/285D06M15/507D06M2101/06D06M2200/40
Inventor 朱谱新程飞林义
Owner SICHUAN UNIV
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