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Acrylic polyester-type hyperdispersant and preparation method and application thereof

An acrylic polyester and hyperdispersant technology, applied in applications, household appliances, coatings, etc., can solve the problems of insufficient dispersion stability of low-temperature construction performance, limited storage and use of dispersion systems, and reduced viscosity of dispersion systems. To achieve the effect of good storage and use performance, low viscosity, and improved flocculation performance

Inactive Publication Date: 2014-07-02
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, acrylate dispersants have been widely used, but their low-temperature construction performance and dispersion stability are insufficient, mainly due to the unsatisfactory effect in reducing the viscosity of the dispersion system, and the storage and use of the dispersion system under low temperature conditions are relatively limited. Big

Method used

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  • Acrylic polyester-type hyperdispersant and preparation method and application thereof
  • Acrylic polyester-type hyperdispersant and preparation method and application thereof
  • Acrylic polyester-type hyperdispersant and preparation method and application thereof

Examples

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preparation example Construction

[0042] Preparation of m-pentadecylphenyl acrylate

[0043] In a 250mL four-neck flask, add an appropriate amount of solvent, m-pentadecylphenol and cuprous chloride (500PPM), then add acryloyl chloride and ionic liquid, and slowly add the acid-binding agent III with constant pressure dropping funnel under stirring. Ethylamine, sealed with a balloon over the reflux condenser. The molar ratio of acid chloride / pentadecylphenol was 1.15, and the temperature was raised to 57°C. After 8.25 hours of reaction, the generated triethylamine hydrochloride was removed by filtration while it was hot. The filtrate was diluted with chromatographic grade methanol and analyzed by liquid phase to determine the reaction yield. After the filtrate was washed with water, the solvent was removed by rotary evaporation to obtain the crude m-pentadecylphenyl acrylate, which was recrystallized to obtain the pure product.

Embodiment 1

[0045] Weigh 1 part of methacrylic acid, 8.5 parts of butyl acrylate, 0.5 part of pentadecyl phenyl acrylate and 0.1 part of chain transfer agent mercaptoacetic acid (the same below), 0.1 part of initiator AIBN, 25 parts of acetone and isopropanol (The mass ratio of the two is 1:1, the same below). The solvents are pre-mixed, and a part (not strictly limited, half can be added first) is added to a four-necked flask with a thermometer, and then placed in a pre-heated to 70°C In an oil bath, turn on the mixer. After 2 hours of reaction, the remaining mixture was added using a constant pressure dropping funnel. Then the reaction solution was kept at 70° C. for 4 h, and after cooling down, tetrahydrofuran was added for dilution. Finally, the reaction liquid is poured into the mixed solution of methanol and water to precipitate the polymer, and the precipitate is vacuum-dried to obtain the acrylic polyester hyperdispersant. GPC detection weight average molecular weight is 20000. ...

Embodiment 2

[0047] Weigh 1 part of methacrylic acid, 8.5 parts of butyl acrylate, 0.5 part of pentadecyl phenyl acrylate and chain transfer agent, 0.15 part of AIBN initiator, 25 parts of acetone and isopropanol solvents are mixed in advance, and a part is added to the belt Into the four-neck flask of the thermometer, put nitrogen into the oil bath pan preheated to 80°C, and turn on the stirrer. After 2 hours of reaction, the remaining mixture was added using a constant pressure dropping funnel. Then the reaction solution was kept at 80° C. for 4 h, and after cooling down, tetrahydrofuran was added for dilution. Finally, the reaction liquid is poured into the mixed solution of methanol and water to precipitate the polymer, and the precipitate is vacuum-dried to obtain the acrylic polyester hyperdispersant. GPC detection weight average molecular weight is 10000.

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Abstract

The invention belongs to the technical field of a dispersant, and particularly relates to an acrylic polyester-type hyperdispersant and a preparation method thereof. The acrylic polyester-type hyperdispersant is a polymer obtained from a monomer A, a monomer B and a monomer C by free radicals atactic polymerization, wherein the monomer A is the monomer containing phenyl m-pentadecyl acrylate or derivatives thereof; the monomer B is the monomer containing carboxyl or sulfonic acid or phosphonic acid group; the monomer C is an alkyl (meth)acrylate monomer. The hyperdispersant disclosed by the invention is excellent in dissolving property in an organic medium, the viscosity of a dispersion system can be reduced, the mobility of the dispersion system is improved, and the storage and use performances under a low-temperature condition are good.

Description

technical field [0001] The invention belongs to the technical field of dispersants, in particular to an acrylic polyester hyperdispersant and its preparation method and application. Background technique [0002] In the ink and coating industry, inorganic pigments and nanopowders will inevitably agglomerate during the dispersion and application process, which will eventually affect the performance of the product. The dispersion effect of traditional dispersants in water-based systems is better, but the dispersion effect in solvents is poor. In order to solve this difficult problem, JamesS.Hampton proposed the brand-new concept of hyperdispersant in the 1980s (J.S.Hampton.A review of hyperdispersant technology[J].American Chemical Society, 1986,192:9~12; J.S.Hampton et al. Extending the boundaries of dispersant technology [J]. Progress in Organic Coating, 2002, 45(2): 249-257). Hyperdispersant is a kind of high-efficiency polymer dispersant. In terms of molecular structure d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/18C08F220/06C08F2/38C09D7/12C09D11/03
Inventor 刘国际刘伟徐丽程亮马晓方雒廷亮
Owner ZHENGZHOU UNIV
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