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Redispersible polyacrylic acid resin powder and preparation method thereof

A polyacrylic acid resin, redispersion technology, applied in the field of polyacrylic acid resin powder and its preparation, can solve the problems of safety risks, large sewage discharge, large water resources, etc., to avoid safety risks, reduce sewage discharge, reduce The effect of production costs

Inactive Publication Date: 2017-01-11
湖州展望天明药业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method needs to use a large amount of water resources, and the sewage discharge volume is large, and the production cost is high
At the same time, the polyacrylic acid resin prepared by this method (including the polyacrylic resin II and III recorded in the Chinese Pharmacopoeia) still needs to be dissolved in organic solvents such as ethanol, isopropanol, and acetone before use. The use process is not only costly, but also and a security risk
The invention patent CN104151760A in the application discloses a polyacrylate redispersible latex powder and its preparation method. This method does not need to use a large amount of water resources through emulsion polymerization, reduces sewage discharge, and reduces production costs. Redispersed latex powder is very suitable for the preparation of powdered architectural coatings, but it cannot be used in the preparation of human and animal medicine, feed industry, especially drug coating

Method used

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  • Redispersible polyacrylic acid resin powder and preparation method thereof
  • Redispersible polyacrylic acid resin powder and preparation method thereof
  • Redispersible polyacrylic acid resin powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 180kg of water to a 300-liter enamel reaction kettle, then add 2.25kg of the emulsifier (Tween-80 and sodium lauryl sulfate in mass parts: 2:1), heat to 80°C under stirring, and then add the Potassium persulfide 0.2kg, then slowly add methacrylic acid-methyl methacrylate mixed solution 73.8kg (the mass ratio of methacrylic acid and methyl methacrylate is 50:50, including a small amount of chain transfer agent), in The addition was completed within 135 minutes. After the addition, the mixture was stirred at 85° C. for 2.5 hours, and then cooled to obtain a resin emulsion. Slowly add 2N sodium hydroxide solution to the prepared resin emulsion under stirring to partially neutralize the carboxylate. With the addition of sodium hydroxide solution, the viscosity of the material gradually increases until the viscosity of the material reaches 80mpa.s at 25°C stop adding sodium hydroxide solution. The partly neutralized resin emulsion was filtered through 80 mesh and then s...

Embodiment 2

[0039] Add 180kg of water to a 300-liter enamel reaction kettle, then add 2.1kg of the emulsifier (Tween-80 and sodium lauryl sulfate in mass parts: 2:1), heat to 80°C under stirring, and then add the Ammonium persulfide 0.2kg, then slowly add 73.8kg of methacrylic acid-butyl acrylate mixture (the mass ratio of methacrylic acid to butyl acrylate is 35:65, including a small amount of chain transfer agent), within 135 minutes After the addition, continue to stir at 85°C for 2.5 hours, then cool to obtain a resin emulsion. Slowly add 2N sodium hydroxide solution to the prepared resin emulsion under stirring to partially neutralize the carboxylate groups. With the addition of sodium hydroxide solution, the viscosity of the material gradually increases until the viscosity of the material reaches 100mpa.s at 25°C stop adding sodium hydroxide solution. The partly neutralized resin emulsion was filtered through 80 mesh and then subjected to centrifugal spray drying. The air inlet tem...

Embodiment 3

[0042] Add 180kg of water to a 300-liter enamel reaction kettle, then add 2.1kg of the emulsifier (Tween-80 and sodium lauryl sulfate in mass parts: 2:1), heat to 85°C under stirring, and then add the Potassium persulfide 0.2kg, then slowly add 73.8kg of methacrylic acid-ethyl acrylate mixture (the mass ratio of methacrylic acid to ethyl acrylate is 50:50, including a small amount of chain transfer agent), and add in 135 minutes After the addition, continue to stir at 85°C for 2.5 hours, then cool to obtain a resin emulsion. Slowly add 2N sodium hydroxide solution to the prepared resin emulsion under stirring to partially neutralize the carboxylate groups. With the addition of sodium hydroxide solution, the viscosity of the material gradually increases until the viscosity of the material reaches 100mpa.s at 25°C stop adding sodium hydroxide solution. The partly neutralized resin emulsion was filtered through 80 mesh and then subjected to centrifugal spray drying. The air inle...

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Abstract

The invention relates to redispersible polyacrylic acid resin powder and a preparation method thereof. The polyacrylic acid resin powder has a property of being re-dispersed in water to form aqueous dispersion; the viscosity of the aqueous dispersion at 20 to 30 DEG C is 60 to 80 mpa.s and the average grain diameter of the aqueous dispersion is 200 to 400 nm; the preparation method comprises the steps of obtaining resin emulsion by utilizing a polymer monomer, an emulsifying agent and potassium peroxodisulfate (or ammonium persulfate) by an emulsion polymerization method, adding alkali to partially neutralize the carboxylate radical of the polymer of the resin emulsion and performing spray drying on the partially neutralized resin emulsion to prepare the redispersible polyacrylic resin powder. Due to the preparation method provided by the invention, sewage discharge is reduced and production cost is reduced. The redispersible polyacrylic acid resin powder prepared by the method has the property of being re-dispersed in water to form aqueous dispersion with viscosity, so that the safety risk caused by use of an organic solvent is avoided, and cost is reduced.

Description

technical field [0001] The invention relates to a redispersible polyacrylic acid resin powder and a preparation method thereof. Background technique [0002] The main preparation method of polyacrylic acid resin used in human and animal medicine and feed industry in my country is to first use ethanol as a solvent solution for polymerization, and after the polymerization is completed, it is soaked in a water pool and precipitated to obtain polyacrylic acid resin. This method needs to use a large amount of water resources, and the discharge of sewage is large, and the production cost is high. At the same time, the polyacrylic acid resin prepared by this method (including the polyacrylic resin II and III recorded in the Chinese Pharmacopoeia) still needs to be dissolved in organic solvents such as ethanol, isopropanol, and acetone before use. The use process is not only costly, but also And there are security risks. The invention patent CN104151760A in the application disclos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J3/12C08F220/06C08F220/14C08F220/18
CPCC08F220/06C08F220/14C08F220/18C08J3/122C08J2333/12C08J2333/08C08J2333/02C08F220/1804C08F220/1802
Inventor 刘光海汤荷芬侯俊峰陈颖
Owner 湖州展望天明药业有限公司
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