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Preparation method of acrylic thickening agents with inorganic clay as cross-linking agent

A technology of inorganic clay and acrylic acid, applied in the field of new materials, can solve the problems of reduced thickening effect, poor electrolyte resistance, application limitation, etc., and achieve the effect of reducing cost and improving thickening effect

Active Publication Date: 2015-11-18
CHANGZHOU XIAOGUO INFORMATION SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of cross-linking agents can significantly enhance the shear resistance of thickeners, but literature has pointed out that the addition of cross-linking agents often leads to a decrease in thickening effect
In addition, acrylic thickeners have poor electrolyte resistance, and their application is limited in some fields that require high electrolyte resistance, such as textile reactive printing.

Method used

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  • Preparation method of acrylic thickening agents with inorganic clay as cross-linking agent
  • Preparation method of acrylic thickening agents with inorganic clay as cross-linking agent
  • Preparation method of acrylic thickening agents with inorganic clay as cross-linking agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Add 2mol / LNaCl solution in the round-bottomed flask, then add bentonite, the mass volume ratio of bentonite and sodium chloride solution is 1:40 in g / mL, stir for 6h, discard the supernatant, wash the precipitate, Vacuum-dry at 50°C to obtain sodium-based bentonite, grind the sample, pass through a 200-mesh sieve, and set aside.

[0021] (2) Disperse sodium bentonite in toluene with a solid-to-liquid mass ratio of 1:10, disperse it ultrasonically for 10 minutes, add vinyltriethoxysilane dropwise, and the mass ratio of silane coupling agent to sodium bentonite is 2:1, Use glacial acetic acid to adjust the pH value of the system to 4.0, and react at 70°C for 10h. After the reaction, remove the solvent, vacuum dry, grind, and pass through a 200-mesh sieve to obtain the silane coupling agent-modified bentonite.

[0022] (3) Place the four-necked flask in a cold water bath, add acrylic acid, cetyl acrylate, silane coupling agent modified bentonite, cetyl acrylate and si...

Embodiment 2

[0030] (1) Add 2mol / L NaCl solution to the round bottom flask, then add attapulgite, the mass volume ratio of attapulgite to sodium chloride solution is 1:80 in g / mL, stir for 8h, and discard the supernatant , washed the precipitate, and vacuum-dried at 80°C to obtain sodium-based attapulgite. The sample was ground, passed through a 200-mesh sieve, and set aside.

[0031] (2) Disperse sodium-based attapulgite in xylene at a solid-to-liquid mass ratio of 1:30, disperse it ultrasonically for 30 minutes, and add vinyltrimethoxysilane dropwise. The mass ratio of silane coupling agent to sodium-based attapulgite is 5:1, use glacial acetic acid to adjust the pH value of the system to 5.0, and react at 100°C for 6h. After the reaction, remove the solvent, vacuum dry, grind, and pass through a 200-mesh sieve to obtain the silane coupling agent-modified attapulgite.

[0032] (3) Place the four-necked flask in a cold water bath, add methacrylic acid, myristyl methacrylate, silane coupl...

Embodiment 3

[0034] (1) Add 2mol / LNaCl solution in the round bottom flask, then add kaolin, the mass volume ratio of kaolin and sodium chloride solution is 1:60 in g / mL, stir 7h, discard supernatant, wash precipitation, Vacuum-dry at 70°C to obtain sodium-based kaolin, grind the sample, pass through a 200-mesh sieve, and set aside.

[0035] (2) Disperse sodium-based kaolin in toluene at a solid-to-liquid mass ratio of 1:20, disperse it ultrasonically for 20 minutes, add vinyl tris(β-methoxyethoxy)silane, silane coupling agent and the quality of sodium-based kaolin The ratio was 4:1, the pH value of the system was adjusted to 4.5 with glacial acetic acid, and the reaction was carried out at 80°C for 8 hours. After the reaction, the solvent is removed, vacuum-dried, ground, and passed through a 200-mesh sieve to obtain silane coupling agent-modified kaolin.

[0036](3) Place the four-necked flask in a cold water bath, add itaconic acid, dodecyl acrylate, silane coupling agent modified kaoli...

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Abstract

The invention belongs to the field of new materials and particularly relates to a preparation method of acrylic thickening agents with inorganic clay as a cross-linking agent. According to the method, a silane coupling agent is adopted for modifying the inorganic clay, vinyl is introduced on the surface of the inorganic clay, and then the acrylic thickening agents are prepared through inverse emulsion polymerization by taking vinyl silane coupling agent modified inorganic clay as the cross-linking agent, an acrylic monomer as a main monomer and a hydrophobic long-chain monomer as a functional monomer for improving the electrolyte resistance of the thickening agents. The thickening agent is low in price and has excellent thickening performance and salt tolerance.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a preparation method of an acrylic thickener using inorganic clay as a crosslinking agent. Background technique [0002] Acrylic thickener is a kind of high-efficiency thickener developed rapidly in recent years. It has the characteristics of good thickening effect and excellent comprehensive performance. It is widely used in textile printing and dyeing, leather finishing, architectural coating and other fields. During the synthesis of thickeners, crosslinking agents are usually added. Commonly used crosslinking agents are: diallyl phthalate, N,N'-methylenebispropionamide. The addition of a crosslinking agent can significantly enhance the shear resistance of the thickener, but literature has pointed out that the addition of a crosslinking agent often leads to a reduction in the thickening effect. In addition, acrylic thickeners have poor electrolyte resistance, and thei...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F222/02C08F220/18C08F2/32C08F2/44C08K9/06C08K3/34
Inventor 彭勇刚周永生纪俊玲万怀新
Owner CHANGZHOU XIAOGUO INFORMATION SERVICES
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