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Salt-resistive thickening agent as well as preparation method and application thereof

A thickener and salt-tolerant technology, which is applied in the field of salt-tolerant thickeners, can solve problems such as the influence of salt-resistant performance, the effect of association effects, and the difficulty of uniform copolymerization, so as to achieve stable salt-resistant performance, easy control, and high The effect of cost performance

Inactive Publication Date: 2012-09-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the above method, the use of the hydrophobic long-chain group space structure to improve the salt resistance of polyacrylate thickeners has achieved certain results, but esters containing hydrophobic long-chains (such as: stearyl acrylate, lauryl methacrylate Esters, cetyl methacrylate, etc.) are easily hydrolyzed under alkaline conditions, which will affect the association effect and affect the salt resistance; octadecyl vinyl ether is used as a monomer to improve the salt resistance of thickeners. The ether bond is less affected by acid and alkali, and the long-chain alkyl group can fully exert the association effect, improving the salt resistance of the thickener
However, during the emulsion copolymerization reaction, the neutralized acrylic monomers are mainly dissolved in the water phase, while monomers containing hydrophobic long chains (such as the above-mentioned long-chain esters and long-chain ethers) are mainly dissolved in the oil phase, resulting in The copolymerization reaction is difficult to proceed uniformly, resulting in unstable salt resistance of the product and unsatisfactory effect

Method used

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  • Salt-resistive thickening agent as well as preparation method and application thereof
  • Salt-resistive thickening agent as well as preparation method and application thereof
  • Salt-resistive thickening agent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Add 60g of acrylic acid and 0.6g of N,N-methylenebisacrylamide into the reaction vessel, neutralize with ammonia water until the pH value of the mixture is 6.8; weigh 40g of kerosene and 5.0g of Span-80, and mix the two After fully mixing, slowly add the mixed solution neutralized by acrylic acid, 5.4g of salt-tolerant monomer (A) and 0.18g of ammonium persulfate. The general structural formula of salt-tolerant monomer (A) is:

[0025] ,

[0026] Wherein, R is n-dodecyl, and the degree of polymerization n is 20.

[0027] After stirring at a speed of 1800 rpm, fully emulsified into a viscous liquid, change to a stirring speed of 90 rpm, blow nitrogen, heat, control the temperature at 60 ° C for 2.5 hours, cool to room temperature, add and 5.0g Tween-80, stirring at a speed of 1200 rpm for 35 minutes to obtain a salt-tolerant thickener.

[0028] See attached figure 1 , which is the infrared spectrogram of the salt-tolerant thickener prepared in the present embodiment...

Embodiment 2

[0030] Add 60g of acrylic acid and 0.72g of N,N-methylenebisacrylamide into the reaction vessel, neutralize with sodium hydroxide solution until the pH of the mixture is 6.5; then weigh 36g of odorless kerosene and 3.6g of Span-80 After fully mixing the two, slowly add the mixed solution after neutralization of acrylic acid, 4.8g of salt-tolerant monomer (A) and 0.12g of sodium persulfate. The general structural formula of salt-tolerant monomer (A) is:

[0031] ,

[0032] Among them, R is n-hexadecyl, and the degree of polymerization n is 30; after being stirred at a speed of 1500 rpm and fully emulsified into a viscous liquid, the stirring speed is changed to 80 rpm, nitrogen gas is passed, heating is carried out, and the temperature is controlled. After reacting at 55° C. for 3 hours, cool down to room temperature, add 3.6 g of Tween-80, and stir at 1300 rpm for 30 minutes to obtain a salt-tolerant thickener.

Embodiment 3

[0034]Add 60g of acrylic acid and 0.9g of N,N-methylenebisacrylamide into the reaction vessel, neutralize with sodium hydroxide solution until the pH value of the mixture is 7.0; then weigh 42g of kerosene and 6.3g of Span-80, After fully mixing the two, slowly add the mixed solution after neutralization of acrylic acid, 6.0g of salt-tolerant monomer (A) and 0.24g of potassium persulfate. The general structural formula of salt-tolerant monomer (A) is:

[0035] ,

[0036] Among them, R is n-octadecyl, and the degree of polymerization n is 40; after being stirred at a speed of 2000 rpm and fully emulsified into a viscous liquid, the stirring speed is changed to 120 rpm, nitrogen gas is passed, heating is carried out, and the temperature is controlled. After reacting at 65° C. for 2.8 hours, cool down to room temperature, add 6.3 g of Tween-80, and stir at a speed of 1500 rpm for 32 minutes to obtain a salt-tolerant thickener.

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Abstract

The invention relates to a salt-resistive thickening agent and a preparation method thereof. The preparation method comprises the following steps of: adding a certain mass of acrylic acid and N,N-methylene bisacrylamide into a reaction container; adjusting pH (Potential of Hydrogen) to 6.5-7.0 by using liquid ammonia or a sodium hydroxide solution; adding a mixed solution of Span-80 and kerosene or tasteless kerosene to be completely and uniformly mixed; slowly adding a salt-resistive monomer and a catalyst and sufficiently emulsifying to obtain sticky liquid; introducing nitrogen gas and heating; after the reaction is finished, reducing the temperature to a room temperature; and addingTween-80 and uniformly mixing to obtain the salt-resistive thickening agent which is used for pigment printing and dispersed printing of textiles. The salt-resistive thickening agent takes a polyoxyethylene ether non-ionic hydrophilic monomer containing allyl and a long-chain fatty alcohol chain section as a functional monomer to improve the salt-resistive performance of the thickening agent; the source of raw materials is wide, and a preparation process is simple and easy to be control, so that the salt-resistive thickening agent is suitable for industrial production.

Description

technical field [0001] The invention relates to a thickener for textile printing and its synthesis, in particular to a salt-resistant thickener containing polyoxyethylene ether type nonionic segments of allyl and long-chain fatty alcohols, a preparation method and its application. Background technique [0002] Usually, textile printing needs to add a thickener to the printing paste to increase the viscosity of the printing paste, reduce its fluidity, and make it pseudoplastic. The viscosity is reduced under the action of shear force, and it is easy to remove from the printing screen. The mesh leaks out onto the fabric, and after losing the shear force, the viscosity increases, and it can stay in the original position without penetrating to other positions, and its printing effect is vivid and lifelike. The earliest thickeners used in printing pastes were natural starch and sodium alginate. However, it is difficult to sizing natural starch and removing it after printing fabr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/38D06P1/52
Inventor 周向东张海玲张玉芳
Owner SUZHOU UNIV
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