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Water dispersion type emulsion of crylic acid, preparation method and usage

An acrylic emulsion and dispersion technology, which is applied in textiles and papermaking, chemical instruments and methods, anion exchange, etc., can solve the problems of large amount of organic solvent usage and poor solvent resistance of resin, and achieve low cost, not easy to deform, and easy to promote Effect

Inactive Publication Date: 2005-01-12
GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The idea of ​​this method is similar to Stevens' adsorption method, but the amount of organic solvent used is large, and the solvent resistance of the resin itself is poor.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] First, mix 100 parts of acrylic monomer with 195 parts of butyl acrylate, 97 parts of methyl methacrylate, and 14 parts of vinyl acetate, and mix 1 / 3 of the total amount of the mixed monomer with 120 parts Ionized water, stirred for 50-60min for pre-emulsification. Adjust the pH to about 4-6 with sodium bicarbonate. Raise the temperature to 78°C, add 0.3 parts of ammonium persulfate to initiate the reaction, keep stirring for 50 minutes, and react until the product shows blue light and no monomer refluxes. Add the remaining mixed monomers and 200 parts of deionized water in batches in the reactor, and control the dropping rate within 1-2 hours. When the reaction temperature rises to 78°C, add 1 part of initiator ammonium persulfate and adjust it at any time. The pH is about 7.5 and the temperature is kept at 72°C, and the stirring speed is 80-100r / min.

[0038] Finally, add 0.05 part of initiator to kill residual monomer, cool down and discharge.

[0039] An emulsion...

Embodiment 2

[0041] Mix 100 parts of acrylic monomers, 270 parts of butyl acrylate, 100 parts of methyl methacrylate, 4 parts of acrylonitrile, and 20 parts of vinyl acetate monomers, and mix 1 / 3 of the total amount of monomers with 170 parts Parts of deionized water, stirred for 60min for pre-emulsification.

[0042] Adjust the pH to about 4-6 with sodium bicarbonate. When the temperature was raised to 81°C, 0.7 parts of potassium persulfate was added to initiate the reaction, and kept stirring for 70 minutes until there was no monomer reflux in the reaction, and the product showed blue light at this time. Add the remaining mixed monomers and 380 parts of deionized water in batches to the reaction kettle, control the dropping speed within 1-2 hours, and add 1.5 parts of initiator at the same time when the reaction temperature rises to 80°C, adjust the pH to about 7 at any time, and keep it warm 76°C, the stirring speed is 80r / min.

[0043] Finally, add 0.08 initiator to kill residual mo...

Embodiment 3

[0046] First, mix 100 parts of acrylic monomer with 300 parts of butyl acrylate, 140 parts of methyl methacrylate, 9 parts of acrylonitrile, and 19 parts of vinyl acetate, and take 1 / 3 of the total amount of the mixed monomer to mix with 200 parts of deionized water, stirred for 60 minutes for pre-emulsification.

[0047] Adjust the pH to about 4-6 with sodium bicarbonate. Raise the temperature to 80°C and add 0.5 parts of ammonium persulfate to initiate the reaction, and keep stirring for 70 minutes until there is no monomer reflux, and the product shows blue light. Add the remaining 2 / 3 mixed monomer and 400 parts of water in batches at the same time in the reaction kettle, control the dropping speed within 1-2 hours, add 2 parts of the initiator while the reaction temperature rises to 80 °C, and oxidize with hydrogen Adjust the pH to 8.5 with sodium at any time, keep warm at 80°C, and stir at a speed of 90r / min.

[0048] Finally, 0.05 part of initiator is added to kill re...

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PUM

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Abstract

The invention relates to a water dispersible type polyacrylic emulsion whose emulsoid surface has functional group, its preparation method and application. Said emulsion is made up by using (by weight portion) acrylic acid 100, butyl acrylate 180-400, methyl methacrylate 80-160, vinyl acetate 10-20, acrylonitrile 0-10, deionized water 250-780 and radical initiator 0.5-3 through the processes of reaction and polymerization. Its preparation method includes the following steps: firstly, using 1 / 3-2 / 5 of mixed monomer, making pre-emulsification, regulating pH value to 4-6, heating to 74-83 deg.C, making partial radical initiator produce initiation reaction, then drop-adding residual mixed monomer, at same time adding initiator to make reaction. Said polyacrylic emulsion only has need of coating, it can make the reactive acrylic resin into reactive film adhered to and covered over the surface of carrier so as to form the material with ion-exchange function. Its ion-exchange performance is not influenced by arrier property.

Description

field of invention [0001] The invention relates to a water-dispersed acrylic emulsion with functional groups on the surface of latex, a preparation method and application thereof. Background of the invention [0002] At present, the acrylic resin used for ion exchange by coating and forming a film has not been reported in the literature. The carrier of ion exchange composite materials is often polystyrene-divinylbenzene, glass beads and cellulose, etc., and ion exchange functional groups often need It is connected to the monomer through complex chemical reactions, or it is bonded to the carrier by adding a cross-linking agent. There is no similar report that ion-exchange resins can be prepared on general-purpose materials by a simple method of coating and film formation. Currently available ion exchange materials and molding processes are divided into: [0003] 1. The polymer (such as cellulose) is used as the carrier, and the reactive functional group is grafted on it by ...

Claims

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Application Information

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IPC IPC(8): B01J41/12B01J47/12C08F2/22C08F4/40C08F220/16D06M15/263
Inventor 葛家良周琨李业琛
Owner GUANGZHOU INST OF GEOCHEMISTRY - CHINESE ACAD OF SCI
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