A polyacrylic acid thickener using modified attapulgite as a crosslinking agent and its preparation method

A technology of polyacrylic acid and cross-linking agent, which is applied in the direction of coating, etc., can solve the problems of poor electrolyte resistance and application limitations, and achieve the effects of high paste rate, reduced production cost and good combination

Active Publication Date: 2020-08-04
江苏麦阁吸附剂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the acrylic thickener has poor electrolyte resistance, and its application is limited in some fields

Method used

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  • A polyacrylic acid thickener using modified attapulgite as a crosslinking agent and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Place attapulgite in 2mol / L nitric acid solution, ultrasonicate at 70°C for 60 minutes, wash with water until neutral, then centrifuge, dry, grind through a 400-mesh sieve, and set aside;

[0028] (2) Take 10g of the attapulgite treated in step (1), disperse it in toluene at a solid-to-liquid mass ratio of 1:10, disperse it ultrasonically for 10 minutes, and add the silane coupling agent γ-aminopropyltriethoxysilane dropwise , the mass ratio of silane coupling agent to attapulgite is 5:1, using glacial acetic acid to adjust the pH value of the system to 4.0, and stirring at room temperature for 48 hours. Joint agent modified attapulgite;

[0029] (3) Disperse 1 part (by weight) of the above-mentioned silane coupling agent-modified organoattapulgite in 10 parts (by volume) of methanol solution, and add acrylate dropwise at 50°C under stirring, and acrylate and The mass ratio of organic attapulgite modified by silane coupling agent is 3:1. After the dropwise addition...

Embodiment 2

[0034] (1) Place attapulgite in 2mol / L nitric acid solution, ultrasonicate at 80°C for 30min, wash with water until neutral, then centrifuge, dry, grind through a 400-mesh sieve, and set aside;

[0035] (2) Take 10g of the attapulgite treated in step (1), disperse it in xylene at a solid-to-liquid mass ratio of 1:30, disperse it ultrasonically for 30 minutes, and add the silane coupling agent γ-aminopropyltrimethoxysilane dropwise , the mass ratio of silane coupling agent to attapulgite is 8:1, using glacial acetic acid to adjust the pH value of the system to 5.0, stirring at room temperature for 96h, after the reaction, remove the solvent, dry in vacuum, grind through a 400-mesh sieve to obtain silane coupling agent Joint agent modified attapulgite;

[0036] (3) Disperse 1 part (by weight) of the above-mentioned silane coupling agent-modified organic attapulgite in 25 parts (by volume) of methanol solution, and add acrylate dropwise under stirring at 50 ° C. Acrylate and The...

Embodiment 3

[0041] (1) Place attapulgite in 2mol / L nitric acid solution, ultrasonicate at 75°C for 45min, wash with water until neutral, then centrifuge, dry, grind through a 400-mesh sieve, and set aside;

[0042] (2) Take 10 g of the attapulgite treated in step (1), disperse it in toluene at a solid-to-liquid mass ratio of 1:20, disperse it ultrasonically for 20 minutes, and add dropwise the silane coupling agent N-(β-aminoethyl)- γ-Aminopropyltrimethoxysilane, the mass ratio of silane coupling agent to attapulgite is 6:1, the pH value of the system is adjusted to 4.5 with glacial acetic acid, stirred at room temperature for 72 hours, after the reaction is completed, the solvent is removed, and vacuum-dried, Grinding through a 400-mesh sieve to obtain silane coupling agent-modified attapulgite;

[0043] (3) Disperse 1 part (by weight) of the above-mentioned silane coupling agent-modified organoattapulgite in 15 parts (by volume) of methanol solution, and add acrylate dropwise at 50 ° C ...

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Abstract

The invention belongs to the technical field of new materials and particularly relates to a polyacrylic acid thickener taking modified attapulgite as a cross-linking agent and a preparation method ofthe polyacrylic acid thickener. According to the method, long-chain hydrophobic hexadecyl acrylate and acrylic monomers are copolymerized, the modified attapulgite with good thixotropy and plasticityis added to serve as the cross-linking agent, and an attapulgite / polyacrylic acid composite thickener is prepared through inverse emulsion polymerization. The obtained thickening agent is low in priceand excellent in thickening performance and salt resistance.

Description

technical field [0001] The invention belongs to the field of new materials, and in particular relates to a polyacrylic acid thickener using modified attapulgite as a crosslinking agent and a preparation method thereof. Background technique [0002] Thickeners can quickly increase the viscosity of products in a short period of time, and have been widely used in food, printing and dyeing, adhesives, oil exploration, cosmetics, coatings, detergents, medicine, rubber and other fields. Most of the thickeners used in the early days were natural water-soluble thickeners, but the thickening effect of such products was poor. Acrylic synthetic thickeners have the characteristics of high production efficiency, good product thickening effect, and less solvent usage, and have been developed rapidly in recent years. However, the poor electrolyte resistance of acrylic thickeners limits its application in some fields. Contents of the invention [0003] Aiming at the deficiencies of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F292/00C08F220/18C08F220/06C09D7/43
CPCC08F292/00C09D7/43C08F220/06
Inventor 万怀新郑先进蔡沐芳彭勇刚冉鑫
Owner 江苏麦阁吸附剂有限公司
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