Polymer hollow microsphere and preparation method thereof

A technology of hollow microspheres and polymers, which is applied in the field of polymer hollow microspheres and its preparation, can solve the problems of waste water and waste residues, small hollow microspheres, poor acid and alkali resistance, etc., and achieve a variety of products, Good acid and alkali resistance, low energy consumption

Inactive Publication Date: 2008-08-27
金小刚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The first object of the present invention is to overcome the defects and deficiencies of the existing microsphere preparation method, such as high energy consumption, generation of waste water and waste residue, and smaller particle size of hollow microspheres, to provide a method that does not produce waste water and waste residue, and has less energy consumption. Preparation method of polymer hollow microspheres with controllable particle size
[0004] The second object of the present invention is to overcome the defects and deficiencies of the existing hollow microspheres with small particle size and poor acid and alkali resistance, and provide a hollow microsphere with a large particle size and negative pressure inside the microsphere, which is acid and alkali resistant and insulating Polymer hollow microspheres with good thermal insulation performance

Method used

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Examples

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preparation example Construction

[0048] A preparation method of polymer hollow microspheres, comprising the following steps:

[0049] A. Preparation of seed emulsion:

[0050] Mix the mixed emulsifier into the water and stir evenly, then add the water-absorbing polymer monomer and copolymer monomer, stir quickly to emulsify the monomer fully, then raise the temperature to 60-80°C, add the initiator and keep it warm for 4-6 hours get the seed emulsion,

[0051] The weight part content of described raw material is:

[0052] Water 1500-2500

[0053] Mixed emulsifier 1.5-2.5

[0054] Water-absorbing polymer monomer 5-15

[0055] Copolymer monomer 4-6

[0056] Initiator 0.5-1.5;

[0057] B. Preparation of water-absorbing core polymer:

[0058] At 60-80°C, slowly drop an emulsion composed of water-absorbing polymer monomers, copolymer monomers, mixed emulsifiers and water into the seed emulsion, and add alkaline aqueous solution to adjust the pH value after fully reacting for 1.5 hours 8 to 9, to obtain a w...

Embodiment 1

[0089] 1. Add 2000 grams of water, 1.25 grams of OP-10 surfactant and 0.65 grams of sodium dodecylsulfonate (SDS) into a four-neck flask equipped with a reflux condensing device and a stirrer, and stir fully to make the surfactant completely Dissolve in water, then add 10 grams of methacrylic acid (MAA), 5 grams of methyl methacrylate (MMA), 2 grams of butyl acrylate (BA), adjust the rotating speed to 1100 rpm to fully emulsify the monomer, and then Raise the temperature to 70° C. and add 1 gram of 2% potassium persulfate (KPS) solution, carry out emulsion polymerization at 70° C., and react for 4-6 hours to obtain a seed emulsion. The particle size of the seed emulsion measured by a particle size analyzer is 0.018 microns

[0090] 2. Using the above prepared emulsion as seeds, prepare a water-absorbing shell: heat the above prepared emulsion to 70°C, slowly add 244 grams of methacrylic acid, 40 grams of methyl methacrylate, 28 grams of styrene, 3.6 grams of mixed emulsifier ...

Embodiment 2

[0095]1. Add 2000 grams of water, 1.25 grams of OP-10 surfactant and 0.65 grams of sodium dodecylsulfonate into a four-neck flask equipped with a reflux condensing device and a stirrer, and stir fully to make the surfactant completely dissolve in water , then add 15 grams of methacrylic acid, 8 grams of methyl methacrylate, 3 grams of butyl acrylate, adjust the rotating speed to 1100 rpm to fully emulsify the monomer, then heat up to 70 ° C and add 2 grams of 2% persulfuric acid Potassium solution, carry out emulsion polymerization at 70°C, react for 4-6 hours to obtain seed emulsion. The particle size of the seed emulsion measured by a particle size analyzer is 0.026 microns

[0096] 2. Using the above prepared emulsion as seeds, prepare a water-absorbing shell: heat the above prepared emulsion to 70°C, slowly add 356 grams of methacrylic acid, 50 grams of methyl methacrylate, 45 grams of styrene, 4.8 grams of mixed emulsifier (the solution after mixing OP-10 and sodium dode...

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PUM

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Abstract

The invention relates to a polymer hollow microsphere and a relative preparation method. The preparation method comprises using emulsion polymerization method to prepare water absorbing polymer, using core-shell polymerization to prepare the polymer microsphre coated by water absorbing polymer, using the reaction character of functional monomer at the surface of the polymer microsphere and atomization drying to obtain the polymer hollow microsphere with ideal size, many internal hollow microspheres and negative pressure in the hollow microsphere. The preparation method has low energy consumption, controllable preparation, various products, controllable grain size of hollow microsphere, better size adaptability, high stability, high production efficiency, no generation of waste water, waste gas and waste slag, low pollution and environment protection, whose polymer hollow microspheres have better acie and alkali resistnace. The invention is suitable for construction material and paint, with wide application and practical value.

Description

technical field [0001] The invention relates to a polymer material and a preparation method thereof, in particular to a polymer hollow microsphere and a preparation method thereof. Background technique [0002] Hollow microspheres have received extensive attention in polymerization research in recent years. The reason is that hollow microspheres are a polymer material with a special structure, and the particle size is between micron and nanometer. Characterized in one, it has broad application prospects in biology, light, magnetism, nuclear physics and electronics. This technology has been a research hotspot in recent years. Up to now, the main methods for preparing polymer hollow microspheres are template method, self-assembly method and emulsion polymerization method. Because the template method and self-assembly method have high requirements on environmental conditions, there has not yet been formed. There is a real process in the sense of practical operation, and the em...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/06C08F220/12C08F212/08C08F226/06C08F218/08C08F2/22C08F8/00C08J9/00C08J3/12
Inventor 金小刚邓岩刚李晓勇
Owner 金小刚
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