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Freezing-resistant acrylate suspended thickening emulsion and preparation method thereof

An acrylate and antifreeze technology, applied in the field of thickeners, can solve the problems of increased storage and transportation costs in cold regions, poor freeze-thaw stability, difficult to remove, etc., to achieve strong ability to suspend air bubbles and particles, freeze-thaw stability Good performance and stable application performance

Active Publication Date: 2014-05-07
GUANGZHOU DX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

②The emulsifier and other auxiliary components of the polymer emulsion are difficult to remove, thus affecting some properties of the product, such as mechanical properties, electrical conductivity, etc.
③ It is difficult to prepare special and special-shaped polymer particles, which cannot meet the needs of high-tech fields
These all limit the application of this product in the daily chemical industry
In addition, some existing thickeners that can be used in the daily chemical industry have some problems in the transparency of the aqueous solution, the transparency of the compound, the suspension performance and the stability of the emulsion.
[0006] In addition, the freeze-thaw stability of current emulsion thickener products is very poor. The emulsion is stored at -5°C for more than 24 hours. After returning to room temperature, the emulsion breaks and cannot be used normally, which increases storage and transportation costs in cold regions.

Method used

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  • Freezing-resistant acrylate suspended thickening emulsion and preparation method thereof
  • Freezing-resistant acrylate suspended thickening emulsion and preparation method thereof
  • Freezing-resistant acrylate suspended thickening emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037]Add 350g deionized water to a 1L four-neck flask, add 1.8g Span-80, 3.2g sodium dodecylbenzenesulfonate, 1.0g triethylamine and 0.5g triethanolamine at the same time, stir at a speed of 500r / min for 20min Obtain emulsifier solution; Acrylic acid 10g, methacrylic acid 90g, ethyl acrylate 60g, hydroxyethyl acrylate 10g, hydroxyethyl methacrylate 10g, butyl methacrylate 20g, fatty alcohol polyoxyethylene ether methacrylate 4.0g, 0.7g of N,N'-methylenebisacrylamide was added to the mixing tank, and stirred uniformly to obtain mixed monomer; 0.2g potassium persulfate was dissolved in 50g deionized water, and stirred uniformly to obtain an initiator solution; Add 12 g of mixed monomers into the solution, and stir for 20 min at a rotational speed of 500 r / min to obtain a seed emulsion.

[0038] Add the initiator solution dropwise to the seed emulsion heated to 80°C, and start adding the remaining mixed monomers dropwise after 30 minutes. After the mixed monomers and the initiat...

Embodiment 2

[0044] Add 360g of deionized water to a 1L four-neck flask, add 1.8g of Span-80, 3.3g of sodium dodecylbenzenesulfonate, 1.4g of triethylamine and 0.1g of sodium hydroxide at the same time, and stir at a speed of 500r / min 30min to obtain an emulsifier solution; 10g of acrylic acid, 90g of methacrylic acid, 65g of ethyl acrylate, 5g of hydroxyethyl acrylate, 10g of hydroxyethyl methacrylate, 7g of butyl acrylate, 13g of butyl methacrylate, fatty alcohol polyoxygen Add 4.2g of vinyl ether methacrylate and 0.7g of N,N'-methylene bisacrylamide into the mixing tank, and stir to obtain mixed monomers; dissolve 0.2g of potassium persulfate in 50g of deionized water, and stir to obtain the initiator Add the emulsifier solution; add 12g of mixed monomers to the emulsifier solution, and stir at a speed of 500r / min for 20min to obtain the seed emulsion.

[0045] Add the initiator solution dropwise to the seed emulsion heated to 80°C, and start adding the remaining mixed monomers dropwise...

Embodiment 3

[0051] Add 350 g of deionized water to a 1 L four-necked flask, and simultaneously add 1.9 g of Span-80, 3.3 g of sodium dodecylbenzenesulfonate, and 1.5 g of triethylamine, and stir at a speed of 400 r / min for 30 min to obtain an emulsifier solution; Acrylic acid 20g, methacrylic acid 80g, ethyl acrylate 50g, hydroxyethyl acrylate 15g, hydroxyethyl methacrylate 15g, butyl methacrylate 20g, fatty alcohol polyoxyethylene ether methacrylate 3.9g, N, Add 0.5g of N'-methylene bisacrylamide and 0.3g of ethylene glycol bismethacrylate into the mixing tank, stir well to obtain mixed monomers; dissolve 0.4g potassium persulfate in 50g deionized water, stir well to obtain initiator agent solution; add 12 g of mixed monomers to the emulsifier solution, and stir for 25 minutes at a rotational speed of 500 r / min to obtain a seed emulsion.

[0052] Add the initiator solution dropwise to the seed emulsion heated to 80°C, and start to add the remaining mixed monomers dropwise after 30 minute...

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Abstract

The invention relates to a freezing-resistant acrylate suspended thickening emulsion which is prepared from 28.0-32.0 wt% of raw material and 68.0-72.0 wt% of deionized water. The raw material is composed of the following components in percentage by weight: 10.0-75.5% of hydrophilic monomer, 15.0-85.0% of hydrophobic monomer, 0-3.0% of crosslinking monomer, 0.5-25.0% of hydrophobicity-modified surface-active monomer, 1.0-14.0% of emulsifier, 0.1-1.0% of initiator and 0.1-2.5% of alkaline matter. The invention also relates to a preparation method of the freezing-resistant acrylate suspended thickening emulsion. The freezing-resistant acrylate suspended thickening emulsion can satisfy the standard in daily chemical industry, and has the advantages of stable application performance, long shelf life and favorable freezing resistance.

Description

technical field [0001] The invention relates to a thickener, in particular to an antifreeze acrylate suspension thickening emulsion. Background technique [0002] There are many types of thickeners on the market, mainly including inorganic thickeners, including: organic bentonite, diatomaceous earth, silica gel, etc.; natural polymers and their derivatives, including: starch, guar gum, gum arabic, Agar, cellulose, etc.; synthetic polymers, including: polyacrylamide, polyvinyl alcohol, polyvinylpyrrolidone, polyacrylic acid, sodium polyacrylate, polyacrylate copolymer emulsion, polyurethane, etc. With the continuous expansion of the application field of thickeners, the requirements for the performance of thickeners have been continuously improved. Now synthetic polymer thickeners have been developed rapidly, with more and more types and more and more applications. A very important class of synthetic polymer thickeners is polyacrylic acid (ester) emulsions. Because emulsion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/28C08F220/18C08F222/38C08F220/20C08F2/26C08F2/30C08F4/30
Inventor 饶树良陈捷
Owner GUANGZHOU DX CHEM
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