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: 2007-03-28
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 in a ratio of 1:0.01 to the mixer, and adjust with sodium hydroxide under stirring. The polymerization system is to pH value=5; then in the polymerization system, at the ratio of 1:0.1:0.1:0.01:0.01, attapulgite, bentonite, 1% sodium sulfite solution, and potassium metabisulfite solution are added in turn, and after each feeding is stirred evenly Then add the next raw material; then transfer the polymerization system into the polymerization reactor, and carry out the polymerization reaction at 45°C for 3 hours; finally, the polymerized colloid is dried, pulverized and sieved to obtain a multi-component water-retaining agent.

Embodiment 2

[0011] Embodiment 2. First, add pure acrylic acid and N,N'-methylenebisacrylamide aqueous solution with a concentration of 1% in sequence at a ratio of 1:0.05 in the mixer, and adjust the polymerization system with sodium hydroxide under stirring. PH value=5.5; then add attapulgite, bentonite, 1% sodium sulfite solution, and potassium sulfite solution in the ratio of 1: 0.5: 0.5: 0.02: 0.02 in the polymerization system. A raw material; then the polymerization system is moved into a polymerization reactor, and the polymerization reaction is carried out at 50° C. for 3.5 hours; finally, the polymerized colloid is dried, pulverized and sieved to obtain a multi-component water-retaining agent.

Embodiment 3

[0012] Embodiment 3. First, add 38.5% acrylamide aqueous solution and pure acrylic acid (the ratio of acrylamide aqueous solution and pure acrylic acid is 1:1) in the proportion of 1:0.1 in the mixer, and the concentration is 1% N, N' - Methylenebisacrylamide aqueous solution, adjust the polymerization system to pH=6 with sodium hydroxide under stirring; then add attapulgite, bentonite, 1% sodium sulfite solution, potassium metabisulfite solution, and then add the next raw material after each feeding; then move the polymerization system into the polymerization reactor, and conduct the polymerization reaction at 60 ° C for 4 hours; finally, the polymerized colloid is dried. 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 agent has been widely used in many fields, but its application has been greatly limited due to high cost. How to reduce the cost of water-retaining agent is an important and urgent issue that water-retaining agent is currently facing. Chinese patent CN1359974 discloses a low-cost water-retaining agent prepared by adding kaolin and bentonite through the copolymerization of acrylamide and potassium acrylate. Using this method to produce water-retaining agent is not conducive to large-scale continuous production. Chinese Patent Application No. 03120346.9 discloses a preparation method of an organic-inorganic composite water-retaining agent prepared by using 100 parts of acrylic acid and 20-60 parts of acidified attapulgite, becau...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F2/38
Inventor 师进黄高宝
Owner 师进
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