Acrylic resin with high solid content, weather resistance and appearance

A technology of acrylic resin and high solid content, applied in the direction of coating, etc., can solve the problems of inability to prepare polyacrylic acid emulsion with high solid content or high viscosity, and the inability to use microchannel reactors, so as to improve outdoor durability and excellent coating The effect of layer appearance and high reaction efficiency

Active Publication Date: 2020-09-22
苏州聚洸高分子科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Microchannel reactors have the characteristics of fast mixing, large specific surface area, green safety, small volume, less side reactions, continuous reaction, large number increase, flexible production, etc. However, the use of microchannel reactors is also limited by various conditions. It is difficult to use microchannel reactors for chemical reactions, especially for reactions with high liquid viscosity and reactions that generate solids. At present, microchannel reactors cannot be used.
[0006] CN105273113 discloses a polyacrylic acid synthesis reaction device and polyacrylic acid synthesis method, which uses a micro-reaction device to prepare polyacrylic acid, and controls the molecular weight distribution of polyacrylic acid to a certain extent, and improves the yield and stability. The product is polyacrylic acid emulsion, but high solid content or high viscosity polyacrylic acid emulsion cannot be prepared by using its equipment and methods

Method used

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  • Acrylic resin with high solid content, weather resistance and appearance
  • Acrylic resin with high solid content, weather resistance and appearance
  • Acrylic resin with high solid content, weather resistance and appearance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-3

[0039] Examples 1-3 and comparative examples 1-3 of the raw materials and their dosage and reaction conditions are shown in Tables 1 and 2.

[0040] Table 1

[0041]

[0042]

[0043] Table 2

[0044]

[0045] In Examples 1-4, the polymerization reaction was carried out at 170° C.-180° C. for 50-100 s under the condition of nitrogen filling and pressurization. The solid content of the obtained acrylic resin is 76%-80%, the viscosity is 3.0-4.0Pa.s, and the appearance is clear and transparent.

Embodiment 5

[0048] The acrylic resin obtained in Example 1 was applied to a high-solid coating system, and the results were tested, and the existing acrylic resin was used as Comparative Example 4. The paint composition is shown in Table 3, and the related properties are shown in Table 4.

[0049] table 3

[0050]

[0051]

[0052] Table 4

[0053]

[0054] The results show that the acrylic resin prepared by the present application is more environmentally friendly in the high-solid paint system, the paint has a longer service life, shorter drying time, better gloss and better weather resistance.

Embodiment 6

[0056] The acrylic resin obtained in Example 4 was applied to the quick-drying paint system, and the results were tested, and the existing acrylic resin was used as Comparative Example 5. The paint composition is shown in Table 5, and the relevant properties are shown in Table 6.

[0057] table 5

[0058]

[0059] Table 6

[0060]

[0061] Note: Test method for solvent resistance of paint film: Soak three pieces of cotton cloth in xylene (solvent resistance) or gasoline (gasoline resistance), put the cotton cloth on the sample board for 10-15 seconds and start timing for 30 minutes, when the time is up Immediately remove the cotton cloth on the board, press it on the board with a dry cloth, and scrape the paint film with your fingers back and forth. Result rating: "1" - completely intact, "2" - 1 / 4 scratches present, "3" - 1 / 2 scratches present, "4" - 3 / 4 scratches present, "5" - all scratches mark.

[0062] The results show that the acrylic resin prepared by the pre...

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Abstract

The invention discloses acrylic resin with high solid content, weather resistance and appearance, which is characterized in that the acrylic resin comprises monomers, an initiator, a crosslinking accelerator, a catalyst and an organic solvent as raw materials through polymerization reaction in a micro-channel reactor, wherein the monomer comprises styrene, acrylic acid, hydroxymethyl acrylamide, glycidyl methacrylate, 4-tert-butyl benzoic acid glycidyl ester, diethanol amine and at least three of the following acrylate: butyl acrylate, butyl methacrylate, isobutyl methacrylate, isobornyl methacrylate and hydroxyethyl methacrylate. The method has the advantages of high transfer rate, short contact time, few byproducts, higher conversion rate, good operability, high safety, rapid and directamplification and the like, and the obtained acrylic resin has the characteristics of high solid content, high weather resistance and high appearance, and is particularly suitable for production of high-quality coatings.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to an acrylic resin with high solid content, weather resistance and appearance, a preparation method and application thereof. Background technique [0002] Acrylic resin is widely used in coatings, metallurgy, medicine, cosmetics, etc. because of its excellent physical and chemical properties. At present, its production methods mainly include solution polymerization, emulsion polymerization, bulk polymerization, suspension polymerization and so on. In the solution polymerization method, the solvent is fed together with the monomer as an intermediary substance during the reaction, and the solvent is removed after the reaction in the reactor; but the viscosity of the system increases in the late stage of the reaction in the solution polymerization method, which is not conducive to the removal of the heat of reaction, and is prone to local overheating. Emulsion polymerizat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F220/20C08F212/08C08F220/18C08F220/06C08F220/58C08F220/32C08F222/38C08F2/06C09D133/14
CPCC08F2/06C08F220/20C09D133/24C08F212/08C08F220/1804C08F220/1811C08F220/06C08F220/58C08F220/325C08F222/385
Inventor 付玉柱戴卫军叶军
Owner 苏州聚洸高分子科技有限公司
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