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Acrylic emulsion specially used for stone-like coating as well as preparation method and application of acrylic emulsion

A technology of acrylic emulsion and real stone paint, applied in the direction of coating, etc., can solve the problems of increasing volatile organic compounds, slow drying speed of paint film, reducing hardness, etc., and achieves excellent performance

Active Publication Date: 2019-01-25
浙江科力森化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the method of adding film-forming aids to the emulsion is usually used to achieve low-temperature film-forming, but with the addition of film-forming aids, the drying speed of the paint film is slow, volatile organic compounds are increased, and hardness is reduced.

Method used

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  • Acrylic emulsion specially used for stone-like coating as well as preparation method and application of acrylic emulsion
  • Acrylic emulsion specially used for stone-like coating as well as preparation method and application of acrylic emulsion
  • Acrylic emulsion specially used for stone-like coating as well as preparation method and application of acrylic emulsion

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preparation example Construction

[0039] The present invention also provides the preparation method of the acrylic acid emulsion described in the above technical scheme, comprising the following steps:

[0040] (1) mixing reactive emulsifier, acrylic acid, acrylamide, butyl acrylate, methyl methacrylate, special acrylate monomer and water to obtain a pre-emulsion;

[0041] (2) mixing acrylic acid, methyl methacrylate, room temperature self-crosslinking monomer and silane coupling agent to obtain shell monomer;

[0042] (3) mixing the reactive emulsifier, water and persulfate to obtain a reactive bottom material;

[0043] (4) adding the pre-emulsion and persulfate obtained in the step (1) dropwise to the reaction bottom material obtained in the step (3) to carry out free radical copolymerization, to obtain a nuclear emulsion;

[0044] (5) adding the shell monomer of the step (2) dropwise into the core emulsion of the step (4) to carry out the shell reaction, and then adding a pH regulator after the reaction to...

Embodiment 1

[0060] (1) Emulsification tank: according to the ratio in Table 1, put reactive emulsifier, acrylic acid, acrylamide, butyl acrylate, methyl methacrylate, special acrylate monomer and deionized water in the emulsification tank, Stir for 20 minutes to obtain a pre-emulsion;

[0061] (2) Head tank: place acrylic acid, methyl methacrylate, room temperature self-crosslinking monomer and silane coupling agent in the head tank, and stir for 20 minutes to obtain the shell monomer;

[0062] (3) Reactor: take the remaining weight of reactive emulsifier and deionized water, after heating to a temperature of 88°C, add 1 / 5 weight of potassium persulfate aqueous solution to obtain the reaction bottom material;

[0063] (4) Adding the emulsification tank pre-emulsion and 0.8 weight of potassium persulfate aqueous solution dropwise to the mixed solution at 87-88° C. for 3.0 hours, and nucleation reaction occurs for 1.0 hours of incubation to obtain a nuclear emulsion;

[0064] (5) Lower the...

Embodiment 2

[0067] Acrylic emulsion was prepared according to the ratio in Table 1 and the preparation method of Example 1, and the solid content of the acrylic emulsion prepared in Example 2 was 46%.

[0068] Raw material and consumption used in table 1 embodiment 1~4

[0069]

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Abstract

The invention provides acrylic emulsion specially used for a stone-like coating as well as a preparation method and application of the acrylic emulsion, belonging to the technical field of the stone-like coating. The acrylic emulsion is prepared from the following raw materials in parts by mass: 6-8 parts of acrylic acid, 4 parts of acrylamide, 160-170 parts of butyl acrylate, 130-150 parts of methyl methacrylate, 130-150 parts of a special acrylate monomer, 4-8 parts of a reactive emulsifier, 2-4 parts of a room-temperature self-crosslinking monomer, 3-5 parts of a silane coupling agent, 1-2parts of persulfate, 5-6 parts of a pH adjuster and 500-550 parts of water, wherein the special acrylate monomer is tert-butyl acrylate. The minimum film formation temperature (MFT) of the acrylic emulsion is 0 DEG C; when being used for film formation of the stone-like coating, a film can be formed at 0 DEG C without adding a film-forming aid; when the acrylic emulsion is used for the stone-likecoating, the obtained stone-like coating is excellent in performance, and the standard bonding strength is 1.0-1.3MPa.

Description

technical field [0001] The invention relates to the technical field of real stone paint, in particular to a special acrylic emulsion for real stone paint and its preparation method and application. Background technique [0002] Real stone paint is a very popular and widely used exterior wall coating product in recent years. It is a coating prepared by uniformly blending polymer emulsion, natural colored sand, functional additives, and water. Since real stone paint is generally used outdoors, it must meet the construction requirements throughout the year, and will be washed by rain and sunlight for a long time, so the requirements for film-forming performance, drying speed and hardness of real stone paint are very high. Since the film-forming process of real stone paint is the process of polymer emulsion film-forming, in order to meet the hardness requirements of real stone paint, polymer emulsions with high glass transition temperature (Tg) are usually used. The hardness is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F220/14C08F220/18C08F220/58C08F230/08C09D151/08
CPCC09D151/08C08F283/065C08F230/08C08F220/58C08F220/1804
Inventor 李明杰赵家栋李斌毛雄伟陈尧红
Owner 浙江科力森化学有限公司
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