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Multicomponent moisture holding agent in low cost and preparation method

A water-retaining agent and multi-component technology, which is applied in the field of multi-component low-cost water-retaining agent and its preparation, can solve the problems that are not conducive to large-scale continuous production, serious production environment pollution, and production cost reduction, and achieve large-scale production Production, good gel strength, long-term effect

Inactive Publication Date: 2005-10-26
师进
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN1359974 discloses a low-cost water-retaining agent prepared by adding kaolin and bentonite through the copolymerization of acrylamide and potassium acrylate. The production of water-retaining agent by this method is not conducive to large-scale continuous production
Chinese Patent Application No. 03120346.9 discloses a method for preparing an organic-inorganic composite water-retaining agent using 100 parts of acrylic acid and 20-60 parts of acidified attapulgite, because the method accounts for attapulgite in the water-retaining agent. Less than 1 / 2, the production cost reduction is limited. In addition, the attapulgite is acidified, and the hydrochloric acid used severely corrodes the equipment and seriously pollutes the production environment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Example 1. First add 38.5% acrylamide aqueous solution and 1% N,N'-methylenebisacrylamide aqueous solution to the mixer at a ratio of 1:0.01, and adjust with sodium hydroxide under stirring. Polymerize the system until the pH value = 5; then add attapulgite, bentonite, 1% sodium sulfite solution, and potassium metabisulfite solution in the polymerization system in a ratio of 1:0.1:0.1:0.01:0.01, and stir evenly after each addition Then add the next raw material; then move the polymerization system into the polymerization reactor, and polymerize at 45°C for 3 hours; finally, dry, pulverize and sieve the polymerized colloid to obtain a multi-component water-retaining agent.

Embodiment 2

[0011] Example 2. First add pure acrylic acid and 1% aqueous solution of N,N'-methylenebisacrylamide in the mixer at a ratio of 1:0.05, and adjust the polymerization system to PH value = 5.5; then add attapulgite, bentonite, 1% sodium sulfite solution, and potassium metabisulfite solution in the polymerization system in a ratio of 1:0.5:0.5:0.02:0.02, and add the following A kind of raw material; then move the polymerization system into the polymerization reactor, and polymerize at 50°C for 3.5 hours; finally, dry, pulverize and sieve the polymerized colloid to obtain a multi-component water-retaining agent.

Embodiment 3

[0012] Example 3. First add 38.5% acrylamide aqueous solution and pure acrylic acid (the ratio of acrylamide aqueous solution to pure acrylic acid is 1:1) and 1% N, N' in the mixer in a ratio of 1:0.1 - methylenebisacrylamide aqueous solution, adjust the polymerization system to PH value = 6 with sodium hydroxide under stirring; then add attapulgite, bentonite, 1% sodium sulfite solution, potassium metabisulfite solution, add the next raw material after stirring evenly each time; then move the polymerization system into the polymerization reactor, and polymerize at 60°C for 4 hours; finally bake the polymerized colloid Drying, crushing, and sieving are multi-component water retaining agents.

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PUM

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Abstract

The present invention provids a preparation method of multicomponent low-cost water-retaining agent. Said water-retaining agent is prepared by adopting two organic monomers of acrylamide and acrylic acid as main agent, adding attapulgite and bentonite as reinforcing agent, using ammonium persulate or potassum persulfate as oxidant, using sodium sulfite and potassium metabisulfite as reducing agent and using N,N'-methylene-diacrylamide as cross-linking agent through a certain preparation process.

Description

technical field [0001] The invention relates to a water-retaining agent and a preparation method thereof, in particular to a multi-component low-cost water-retaining agent and a preparation method thereof. Background technique [0002] Water-retaining agents have been widely used in many fields, but their application has been greatly limited due to their high cost. How to reduce the cost of water retaining agent is an important and urgent issue facing water retaining agent. Chinese patent CN1359974 discloses a low-cost water-retaining agent prepared by adding kaolin and bentonite through the copolymerization of acrylamide and potassium acrylate. The production of water-retaining agent by this method is not conducive to large-scale continuous production. Chinese Patent Application No. 03120346.9 discloses a method for preparing an organic-inorganic composite water-retaining agent using 100 parts of acrylic acid and 20-60 parts of acidified attapulgite, because the method acc...

Claims

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Application Information

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IPC IPC(8): C08F220/56
Inventor 师进黄高宝
Owner 师进
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