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A kind of self-healing acrylic microgel self-emulsifying emulsion and preparation method thereof

An automatic repair and microgel technology, which is applied in the direction of microsphere preparation, microcapsule preparation, coating, etc., can solve the problem that the solid content of acrylic microgel emulsion needs to be increased, which affects the water resistance, acid resistance, shell and core of the coating Poor compatibility and other issues, to achieve the effect of reducing the steps of removing organic solvents, avoiding pollution, and high glass transition temperature

Active Publication Date: 2020-11-06
安徽优科新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In view of the existence of existing coatings (1) the core and shell are prepared by a heterogeneous discontinuous system; (2) the emulsifier added during the preparation process affects the water resistance and acid resistance of the coating; (3) the shell and core Poor compatibility between the cores; (4) repair temperature is lower; (5) technical problems such as the solid content of acrylic microgel emulsion need to be improved, the invention provides a kind of self-repairing acrylic microgel self-emulsifying emulsion and its Preparation

Method used

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  • A kind of self-healing acrylic microgel self-emulsifying emulsion and preparation method thereof
  • A kind of self-healing acrylic microgel self-emulsifying emulsion and preparation method thereof
  • A kind of self-healing acrylic microgel self-emulsifying emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A self-repairing acrylic microgel self-emulsifying emulsion, the microgel includes a shell and a core, and the shell composition and parts by mass of each component are:

[0044]

[0045] The composition of the core and the parts by mass of each component are:

[0046]

[0047] A preparation method for self-repairing acrylic microgel self-emulsifying emulsion, the steps are:

[0048] (1) Add 35 parts of water, 0.5 part of Na to the reactor 2 CO 3 , 0.5 parts NaHCO 3 and potassium persulfate to form liquid A, heated to 60°C and kept warm;

[0049] (2) Ethyl acrylate, 3-mercaptopropionic acid, 2-acrylamido-2-methyl-1-propanoic acid (AMPS), lauryl methacrylate, trimethylolpropane triacrylate, methyl Glycidyl acrylate and methacryloxypropyl trimethoxysilane are mixed to obtain a mixture solution B liquid;

[0050] (3) Add liquid B of the mixture solution obtained in step (2) dropwise to liquid A described in step (1), the time for the dropwise addition is 3 hours...

Embodiment 2

[0056] A self-repairing acrylic microgel self-emulsifying emulsion, the microgel includes a shell and a core, and the shell composition and parts by mass of each component are:

[0057]

[0058] The composition of the core and the parts by mass of each component are:

[0059]

[0060] A preparation method for self-repairing acrylic microgel self-emulsifying emulsion, the steps are:

[0061] (1) Add 40 parts of water, 0.75 parts of Na to the reactor 2 CO 3 , 0.75 parts NaHCO 3 and potassium persulfate to form liquid A, heated to 60°C and kept warm;

[0062] (2) Ethyl acrylate, 3-mercaptopropionic acid, 2-acrylamido-2-methyl-1-propanoic acid (AMPS), lauryl methacrylate, trimethylolpropane triacrylate, methyl Glycidyl acrylate and methacryloxypropyl trimethoxysilane are mixed to obtain a mixture solution B liquid;

[0063] (3) Add liquid B of the mixture solution obtained in step (2) dropwise to liquid A described in step (1), the time for adding is 4 hours, keep at 65...

Embodiment 3

[0069] A self-repairing acrylic microgel self-emulsifying emulsion, the microgel includes a shell and a core, and the shell composition and parts by mass of each component are:

[0070]

[0071]The composition of the core and the parts by mass of each component are:

[0072]

[0073]

[0074] A preparation method for self-repairing acrylic microgel self-emulsifying emulsion, the steps are:

[0075] (1) Add 45 parts of water and 1 part of Na to the reactor 2 CO 3 , 1 part NaHCO 3 and potassium persulfate to form liquid A, heated to 60°C and kept warm;

[0076] (2) Ethyl acrylate, 3-mercaptopropionic acid, 2-acrylamido-2-methyl-1-propanoic acid (AMPS), lauryl methacrylate, trimethylolpropane triacrylate, methyl Glycidyl acrylate and methacryloxypropyl trimethoxysilane are mixed to obtain a mixture solution B liquid;

[0077] (3) Add liquid B of the mixture solution obtained in step (2) dropwise to liquid A described in step (1), the time for adding is 5 hours, keep...

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Abstract

The invention discloses automatic repair acrylic microgel self-emulsifying emulsion and a preparation method thereof, belonging to the technical field of modified coatings. The acrylic microgel emulsion comprises a shell layer and a core, wherein the shell layer is prepared from isobornyl methacrylate, cyclohexyl methacrylate, 3-mercaptopropionic acid, styrene, 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS), methylol acrylamide and potassium persulfate; the core is prepared from trimethylolpropane triacrylate, 2-acrylamide-2-methyl-1-propanesulfonic acid (AMPS), lauryl methacrylate, 3-mercaptopropionic acid, ethyl acrylate, glycidyl methacrylate, methacryloxy propyl trimethoxyl silane and potassium persulfate. The emulsion provided by the invention is prepared in a water phase, and has the advantages of being good in compatibility between the shell and the core, high in repair temperature, capable of self-emulsifying, high in solid content, low in emission of volatile organic compounds (VOC) and the like.

Description

technical field [0001] The invention belongs to the technical field of modified coatings, and more specifically relates to a self-repairing acrylic microgel self-emulsifying emulsion and a preparation method thereof. Background technique [0002] During the use of water-based coatings, the coating will inevitably be scratched by the outside and cause scratches, which will affect the appearance of the coating. For example, when it is used in automotive paint, the solution to scratches is usually the need for additional paint, which is costly. Therefore , the research on coatings with self-healing ability has become a research hotspot in this field. In the prior art, based on the principle of using microcapsules to encapsulate the catalyst, after the coating is scratched, the catalyst in the microcapsules is released to react with other substances in the coating to form a cross-linked film, so that the wound can be automatically repaired and healed. Significantly improve the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/18C08F212/08C08F220/58C08F222/14C08F220/32C08F230/08B01J13/14C09D143/04
CPCB01J13/14C08F220/18C08F220/1812C09D143/04C08F220/1806C08F220/58C08F212/08C08F220/325C08F222/103C08F230/08
Inventor 王世玉曹志华
Owner 安徽优科新材料科技有限公司
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