A kind of hydrophobically modified associative thickener and preparation method thereof

An associative thickener and hydrophobic modification technology, used in the field of thickeners, can solve problems such as difficulty in meeting standards, and achieve the effects of stable appearance, strong ability to suspend bubbles and particles, and good stability

Active Publication Date: 2016-01-20
GUANGZHOU DX CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The associative acrylic thickener synthesized by the existing emulsion polymerization method is mainly used in water-based coatings, paper pulp, textile printing and dyeing, water-based adhesives, etc., because these fields have requirements for the thickening effect of the thickener , there is no requirement for the smell of synthetic emulsion, the amount of residual monomer, the transparency of the thickener after neutralization, the transparency and viscosity of the compounded ionic surfactant, and the suspension of bubbles and colored particles. Therefore, conventional The products produced are difficult to meet the standards 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.

Method used

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  • A kind of hydrophobically modified associative thickener and preparation method thereof
  • A kind of hydrophobically modified associative thickener and preparation method thereof
  • A kind of hydrophobically modified associative thickener and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 350g of deionized water to a 1L four-neck flask, add 1.8g of Span-80, 3.2g of sodium dodecylbenzenesulfonate at the same time, and stir at a speed of 400r / min for 20min to obtain an emulsifier solution; 10g of acrylic acid, methyl Acrylic acid 90g, ethyl acrylate 60g, hydroxyethyl acrylate 5g, hydroxyethyl methacrylate 15g, methyl methacrylate 8g, butyl methacrylate 12g, fatty alcohol polyoxyethylene ether methacrylate 4.0g, N , 0.7g of N'-methylenebisacrylamide was added to the mixing tank, and stirred evenly to obtain mixed monomers; 0.5g of potassium persulfate was dissolved in 50g of deionized water, and stirred evenly to obtain an initiator solution; 12 g of the monomer was stirred for 20 min at a rotational speed of 500 r / min to obtain a seed emulsion.

[0034] Add the initiator solution dropwise to the seed emulsion heated to 75°C, and start adding the remaining mixed monomers dropwise after 20 minutes. After the mixed monomers and the initiator solution are ...

Embodiment 2

[0040] Add 360g of deionized water into a 1L four-neck flask, add 1.8g of Span-80, 3.3g of sodium dodecylbenzenesulfonate at the same time, and stir at a speed of 500r / min for 30min to obtain an emulsifier solution; 10g of acrylic acid, methyl Acrylic acid 90g, ethyl acrylate 65g, hydroxyethyl methacrylate 15g, methyl methacrylate 12g, butyl methacrylate 8g, triphenylethylphenoxyether methacrylate 1.1g, fatty alcohol polyoxygen Add 3.1g of vinyl ether methacrylate, 0.7g of N,N'-methylenebisacrylamide into the mixing tank, and stir to obtain mixed monomers; dissolve 0.5g 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.

[0041] Add the initiator solution dropwise to the seed emulsion heated to 75°C, and start adding the remaining mixed monomers dropwise after 20 minutes. After the mixed monom...

Embodiment 3

[0047] Add 350g of deionized water to a 1L four-neck flask, add 1.9g of Span-80, 3.3g of sodium dodecylbenzenesulfonate at the same time, and stir at a speed of 400r / min for 30min to obtain an emulsifier solution; 20g of acrylic acid, methyl Acrylic acid 80g, ethyl acrylate 50g, hydroxyethyl methacrylate 30g, butyl methacrylate 20g, fatty alcohol polyoxyethylene ether methacrylate 3.9g, N,N'-methylenebisacrylamide 0.8g added Mixing tank, stirring uniformly to obtain mixed monomer; dissolving 0.5g potassium persulfate in 50g deionized water, stirring uniformly to obtain initiator solution; adding 12g mixed monomer to emulsifier solution, stirring at 500r / min for 25min to obtain seeds lotion.

[0048] Add the initiator solution dropwise to the seed emulsion heated to 70°C, and start to add the remaining mixed monomers dropwise after 30 minutes. Add 80 g of deionized water and stir evenly, filter the material with a 400-mesh filter cloth to obtain a hydrophobically modified asso...

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Abstract

The invention relates to a hydrophobic modified associative thickener. The hydrophobic modified associative thickener is prepared from 28.0-32.0wt% of raw material and 68.0-72.0wt% of deionized water, wherein the raw material comprises following components in percentage by weight: 10.0-75.5 percent of hydrophilic monomer, 15.0-85.0 percent of hydrophobic monomer, 0-3.0 percent of crosslinking monomer, 0-25.0 percent of hydrophobic modified monomer with the surface activity, 1.0-14.0 percent of emulsifier and 0.1-1.0 percent of initiator. The invention also relates to a preparation method of the hydrophobic modified associative thickener. According to the preparation method, the hydrophobic modified associative thickener is synthesized by using a seeded emulsion polymerization method and the prepared hydrophobic modified associative thickener can satisfy the standard of the daily chemical industry and has the advantages of stable application performance and long shelf life.

Description

technical field [0001] The invention relates to a thickener, in particular to a hydrophobically modified associative thickener. Background technique [0002] The research on hydrophobically modified acrylic thickeners started earlier in foreign countries, and most of the relevant papers were theoretical studies. The research on its performance mostly added hydrophobically modified acrylic thickeners to water to study its rheological behavior in the water phase. However, domestic research focuses on adding hydrophobically modified acrylic thickeners to the emulsion system, that is, mostly research on the practical application of thickeners. In addition to the synthesis of hydrophobically modified acrylic thickeners, there are also some related Compound trial research of thickeners and other thickeners, as well as formulation-related research, etc. [0003] The main synthetic method of hydrophobically modified acrylic thickener is emulsion polymerization. In addition to conve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/06C08F220/18C08F220/28C08F220/14C08F2/26C08F2/30
Inventor 饶树良陈捷
Owner GUANGZHOU DX CHEM
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