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Polymer dispersion and preparation method thereof

A technology for dispersions and polymers, applied in chemical instruments and methods, other chemical processes, etc., can solve problems such as reducing the effective action period, and achieve the effects of preventing stability decline, ensuring stable composition, and appropriate copolymerization temperature.

Inactive Publication Date: 2015-06-10
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of dust suppressant often reduces the effective period of action due to volatilization and rain erosion

Method used

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  • Polymer dispersion and preparation method thereof
  • Polymer dispersion and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The parts by mass are in grams, 3g of acrylic acid is used as anionic monomer, 18g of butyl acrylate, 5g of methyl methacrylate and 2g of hydroxyethyl methacrylate are used as nonionic monomers, and they are uniformly mixed and used as a raw material solution for later use. Add 0.4 g of sodium bicarbonate and 100 g of distilled water to a reactor equipped with a stirrer, a thermometer, a dropping funnel, and a nitrogen conduit, start stirring, and replace with argon for 15 minutes. When the water bath was heated to 80° C., 8 g of potassium persulfate aqueous solution with a mass concentration of 5% and 4 g of sodium vinyl sulfonate were added. After the temperature stabilized, the above-mentioned raw material solution was continuously added dropwise through the dropping funnel, and the dropping speed was controlled, and the dropwise addition was completed within 3 hours. The temperature of the system was raised to 85° C., kept for 1.5 hours, and the system was lowered t...

Embodiment 2

[0046] The implementation steps are the same as in Example 1, the difference is: as a nonionic monomer, 2g hydroxyethyl methacrylate is replaced by 2g methoxy polyoxyethylene ether methacrylate (polyether molecular weight 500); polymerization temperature is 85°C.

[0047] The performance evaluation method is the same as in Example 1.

Embodiment 3

[0049] The number of parts by mass is in grams, and 3g of acrylic acid, 16g of butyl acrylate and 4g of styrene are mixed in proportion to form a raw material solution for later use. Add 0.3 g of sodium carbonate and 100 g of distilled water to a reactor equipped with a stirrer, a thermometer, a dropping funnel, and a nitrogen conduit, start stirring, and replace with nitrogen for 20 minutes. When the water bath was heated to 80° C., 10 g of 5% potassium persulfate aqueous solution, 2 g of allyl sodium sulfonate and 2 g of 2-acrylamide-2-methylpropanesulfonic acid were added. After the temperature stabilized, the raw material solution was continuously added dropwise through the dropping funnel, and the dropping speed was controlled, and the dropwise addition was completed within 3 hours. The temperature of the system was raised to 85° C., kept for 1.5 hours, and the system was lowered to room temperature under stirring. The pH value of the system was adjusted with 2-hydroxyme...

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Abstract

The invention discloses a polymer dispersion and a preparation method thereof. The polymer dispersion is obtained through the soap-free emulsion copolymerization technology. The polymer dispersion comprises a negative ion monomer, a non-ionic monomer, a pH buffering agent, an initiator, an antalkali and water, wherein the negative ion monomer accounts for 3-10 parts of the raw materials, the non-ionic monomer accounts for 10-25 parts of the raw materials, the pH buffering agent accounts for 0.3-1.0 part of the raw materials, the initiator accounts for 0.3-2 parts of the raw materials, and the water accounts for 100 parts of the raw materials. A proper amount of the antalkali is used for adjusting the pH value of a reaction system to range from 6.0 to 9.0. The obtained polymer dispersion is used as a dust depressor, an effective shell can be formed on the surface of dust, and the construction safety and application safety of the polymer dispersion are higher. The polymer dispersion is applied as the chemical dust depressor, can be diluted with water to be sprayed for use, and is good in overall performance, safe and environmentally friendly.

Description

technical field [0001] The invention relates to a chemical dust suppressant in the field of urban road dust control, in particular to a polymer dispersion and a preparation method thereof. Background technique [0002] The scale of the city continues to expand, construction sites are blooming everywhere, and the number of motor vehicles is increasing rapidly. Material storage yards, concrete mixing, and waste dumps can be seen everywhere. Urban dust pollution is becoming more and more prominent, and smog continues. Inhalable particulate matter (PM10) with an aerodynamic diameter of less than 10 μm and fine particulate matter (PM2.5) with an aerodynamic diameter less than 2.5 μm in the atmosphere are collectively referred to as fine dust in the present invention. They are easy to enrich heavy metal ions, organic oxides, bacteria and viruses. PM2.5 particles directly enter the bronchioles and alveoli due to the inability to stop the nasal cavity and throat, which is extremely...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F220/14C08F220/06C08F220/28C08F290/06C08F212/08C08F228/02C08F220/58C08F2/22C09K3/22
Inventor 张福强吴丹殷福星殷昊王新
Owner HEBEI UNIV OF TECH
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