Attapulgite/polyacrylamide composite thickening agent and preparation method

A technology of polyacrylamide and composite thickener, which is applied in the field of natural mineral resources utilization, can solve the problems of poor electrolyte resistance and high price, achieve the effects of wide application, reduce production cost, improve thickening and salt resistance

Inactive Publication Date: 2014-04-09
绍兴柯桥鑫火印花材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, they generally have defects such as high price and poor electrolyte resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: Select attapulgite whose impurities are mainly montmorillonite, wherein the total mass content of attapulgite and montmorillonite>85%, and the mass content of attapulgite≮30%, particle size<13 μm; weigh 7.10 g of propylene Amide was dissolved in deionized water to make an aqueous solution of acrylamide with a mass concentration of 25%. At the same time, 0.71g of attapulgite (325 mesh, 10%) was weighed, and the attapulgite and acrylamide aqueous solution were mixed evenly, and the Beat for 10 minutes, stand still for 12 hours and then beat for 5 minutes at a rotating speed of 6000rpm. After it is fully hydrated, the mixed solution is transferred to the reactor, and the initiator ammonium persulfate aqueous solution is added dropwise under stirring to make the added persulfate The mass ratio of ammonium sulfate to acrylamide is 1:350. After purging nitrogen to remove oxygen, place it in a water bath at 40°C for constant temperature polymerization for 2 hours. Af...

Embodiment 2

[0013] Example 2: Attapulgite whose impurities are mainly montmorillonite is selected, wherein the total content of attapulgite and montmorillonite is >85%, and the mass content of attapulgite is ≮30%, and the particle size is <13 μm; weigh 7.10 g of acrylamide Dissolve in deionized water to make an aqueous acrylamide solution with a mass concentration of 30%, and weigh 1.42g of attapulgite (325 mesh, 20%) at the same time, mix the attapulgite and acrylamide solution evenly, and beat at a speed of 7000rpm 10 minutes, stand still for 12 hours and then beating at a rotating speed of 7000rpm for 5 minutes. After it is fully hydrated, the mixed solution is transferred to the reactor, and the initiator ammonium persulfate aqueous solution is added dropwise under stirring to make the added persulfate The mass ratio of ammonium to acrylamide is 1:250. After purging nitrogen to remove oxygen, place it in a water bath at 50°C for constant temperature polymerization for 2 hours. After th...

Embodiment 3

[0015] Example 3: Attapulgite whose impurities are mainly montmorillonite is selected, wherein the total content of attapulgite and montmorillonite is >85%, and the mass content of attapulgite is ≮30%, and the particle size is <13 μm; 7.10 g of propylene is weighed Amide was dissolved in deionized water to make an aqueous acrylamide solution with a mass concentration of 20%. At the same time, 0.355g of attapulgite (325 mesh, 5%) was weighed, and the attapulgite and acrylamide solution were mixed evenly, and the Beat for 10 minutes, stand still for 12 hours and then beat for 5 minutes at a rotating speed of 5000rpm. After it is fully hydrated, the mixed solution is transferred to the reactor, and the initiator ammonium persulfate aqueous solution is added dropwise under stirring to make the added persulfate The mass ratio of ammonium sulfate to acrylamide is 1:350. After purging nitrogen and removing oxygen, place it in a water bath at 60°C for constant temperature polymerizatio...

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Abstract

The invention discloses an attapulgite / polyacrylamide composite thickening agent and preparation method, the thickening agent is obtained by in-situ polymerization of attapulgite and acrylamide, the attapulgite accounts for 5-25% of mass content in the thickening agent; the raw material attapulgite is montmorillonite type attapulgite, wherein the total mass content of attapulgite and montmorillonite is greater than 85% and the attapulgite clay and montmorillonite is no less than 30%, the granularity is less than 13mum. The preparation method of the thickening agent comprises the following steps: adding attapulgite in an acrylamide polymerization system and beating, fully hydrating and performing water-bath polymerization, drying a polymer and crushing to obtain the thickening agent. When in use, the thickening agent is dissolved by stirring with a sodium hydroxide solution. The attapulgite / polyacrylamide composite thickening agent can substantially increase the thickening and salt resistance performances, and can reduce the production cost of the thickening agent.

Description

technical field [0001] The invention relates to an inorganic / organic composite thickener using natural mineral materials and a preparation method thereof, belonging to the technical field of utilization of natural mineral resources, in particular to an attapulgite / polyacrylamide composite thickener and a preparation method thereof. Background technique [0002] Thickener, also known as gelling agent, its main function is to rapidly increase the viscosity of the system to maintain a uniform and stable suspension or form a gel. Thickener has the characteristics of less dosage, fast aging and good stability, and is widely used in food, coatings, adhesives, cosmetics, detergents, printing and dyeing, oil exploration, rubber, medicine and other fields. Most of the action mechanism of the thickener is to use the extension of the macromolecular chain structure to form a three-dimensional network structure through physical bridges such as chemical bonds or hydrogen bonds, which redu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F120/56C08F2/44C08K3/34C08L33/26
Inventor 丁师杰陈静金叶玲吴健
Owner 绍兴柯桥鑫火印花材料有限公司
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