Thickening agent and preparation method thereof

A thickening agent and structural formula technology, applied in the field of thickening agent and its preparation, can solve the problems of thickening agent can not meet industrial application requirements, poor salt resistance effect, etc., achieve good salt resistance, enhanced inorganic salt resistance and resistance. Temperature performance, the effect of enhancing the viscosity

Inactive Publication Date: 2013-03-13
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

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 ammonia water with a concentration of 30% to The pH of the solution is 6.5; under nitrogen protection, add 6.0mol kerosene, 2.5mol sorbitan oleate, 0.02mol azobisisobutyronitrile, 1.4mol octadecyl acrylate, and emulsify at high speed for 50min; be warming up to 60~65 ℃, the reaction was carried out for 3 hours; finally, 2.1 mol of polyoxyethylene sorbitan monooleate was added for inverse emulsification for 60 minutes, and the salt-tolerant thickener was obtained after discharging.

Embodiment 2

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

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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 thickeners are a kind of high-efficiency thickeners developed in recent years. They have good thickening effect and comprehensive performance, and are widely used in textile printing and dyeing, leather finishing, paper coatings, architectural coatings, oil fields and cosmetic crystals. [0003] In textile printing and dyeing, thickeners can be used in the formulation of printing pastes to limit the permeation of dyes and play an important role in the printing process. At present, the salt tolerance effect of common thickeners on the market is poor, and neutral salts are often added in reactive dye printing, so common thickeners cannot meet the requirements of industrial applications SUMMARY OF THE INVENTION [0004] The main technical problem solved by the invention is: a thicke...

Claims

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Application Information

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IPC IPC(8): C08F220/06C08F220/18C08F222/38D06P1/613
Inventor 顾丰平
Owner ZHANGJIAGANG SHUNCHANG CHEM
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