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Thickening agent and preparation method thereof

A technology of thickener and acrylic acid, which is applied in the field of thickeners, can solve the problems of poor salt resistance and thickeners that cannot meet the requirements of industrial applications, and achieve good salt resistance, enhanced inorganic salt resistance and temperature resistance, The effect of strong viscosity-enhancing ability

Inactive Publication Date: 2014-12-10
ZHANGJIAGANG SHUNCHANG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, common thickeners on the market have poor salt tolerance, and neutral salts are often added to reactive dye printing, so common thickeners cannot meet the requirements of industrial applications.

Method used

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  • Thickening agent and preparation method thereof
  • Thickening agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Place the four-necked flask in an ice-water bath at -10 to 0°C, add 2.5 mol of acrylic acid, 1 mol of N,N'-methylenebisacrylamide, 0.05 mol of dodecanethiol, and dropwise add 4.2 mol of 30% ammonia water to The pH of the solution is 6.5; under the protection of nitrogen, add 6.0mol kerosene, 2.5mol sorbitan oleate, 0.02mol azobisisobutyronitrile, 1.4mol octadecyl acrylate, emulsify at high speed for 50min; heat up to 60~65 ℃, react for 3 hours; finally add 2.1mol polyoxyethylene sorbitan monooleate for inverse emulsification for 60 minutes, and discharge to obtain a salt-resistant thickener.

Embodiment 2

[0019] Place the four-neck flask in an ice-water bath at -10 to 0°C, add 5.2 mol of acrylic acid, 2 mol of N,N'-methylenebisacrylamide, 0.01 mol of dodecanethiol, and dropwise add 8.2 mol of 30% ammonia water to The pH of the solution is 7.0; under the protection of nitrogen, add 12mol kerosene, 6.0mol sorbitan oleate, 0.06mol azobisisobutyronitrile, 2.6mol octadecyl acrylate, high-speed emulsification for 60min; heat up to 60-65°C , reacted for 3.5h; finally added 4.2mol polyoxyethylene sorbitan monooleate for inverse emulsification for 60min, and the salt-resistant thickener was obtained after discharge.

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Abstract

The invention discloses a thickening agent. The structure formula of the thickening agent is shown in the specification, wherein n is equal to 10-15, m is equal to 8-20, and n and m are integers. The preparation of the thickening agent comprises the following steps of: mixing crylic acid, N, N'-methylene bisacrylamide and 1-dodecanethiol and regulating a pH value to 6.5-7.5 at a low temperature; adding kerosene, sorbide oleate, azodiisobutyronitrile and octadecyl acrylate under the protection of nitrogen, emulsifying, warming and reacting; finally, adding polyoxyethylene sorbitan oleate for reverse emulsification, discharging and instantly obtaining a salt resistant thickening agent. A small amount of octadecyl hydrophobic long chain is introduced on an ammonium polyacrylate main chain, so that a thickening agent with better temperature resistance and salt resistance can be obtained. Through the hydrophobic association action among the variety of polymer molecules, macromolecule chains are cross-linked to form a space net structure with certain strength, so that the thickening agent is provided with great hydrodynamic volume and very strong viscosity enhancement property; and the inorganic salt resistance and temperature resistance performances are enhanced through the reversible space net structure formed by the hydrophobic association action.

Description

technical field [0001] The invention belongs to the technical field of thickeners, and in particular relates to a thickener and a preparation method thereof. Background technique [0002] Acrylic thickener is a kind of high-efficiency thickener developed in recent years. Its thickening effect and comprehensive performance are good, and it is widely used in textile printing and dyeing, leather finishing, paper coating, architectural coating, oil field and cosmetic crystal and other fields. [0003] In textile printing and dyeing, thickeners can be used in the preparation of printing pastes to limit the bleeding of dyes and play an important role in the printing process. At present, common thickeners on the market have poor salt tolerance, and neutral salts are often added to reactive dye printing, so common thickeners cannot meet the requirements of industrial applications. Contents of the invention [0004] The technical problem mainly solved by the invention is: a thicke...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/18C08F222/38D06P1/613
Inventor 顾丰平
Owner ZHANGJIAGANG SHUNCHANG CHEM