A post-treatment agent for antifouling self-cleaning paint and preparation method thereof

A post-treatment agent and self-cleaning technology, applied in the field of coatings, can solve the problems of difficult environmental pollution, easy dust collection, high cost, etc., and achieve the effects of improving hardness and aging resistance, increasing cross-linking strength, and ensuring adhesion

Active Publication Date: 2021-10-15
广东四方威凯新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, both of these two coating processes have relatively prominent shortcomings. The coating process of the epoxy primer + acrylic polyurethane topcoat system is relatively mature and simple, and has high cost performance, but its stain resistance is poor. After a period of time, it is easy to vacuum and superimposed with the aging of the coating, the coating will lose its luster and become old, and the coating cannot be restored to a relatively new state even if it is cleaned
Epoxy primer + fluorocarbon polyurethane topcoat system has good aging resistance and good stain resistance, but the cost is relatively high, and the environmental pollution caused by fluororesin residues in the construction process is difficult to deal with

Method used

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  • A post-treatment agent for antifouling self-cleaning paint and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1 of the present invention provides an antifouling self-cleaning coating post-treatment agent, which includes the following raw materials in parts by weight: siloxane 5, silane coupling agent 0.5, polysiloxane oligomer 3, solvent 30 , thermoplastic resin 5, hydroxyl silicone oil 1, polysilazane 10.

[0027] The siloxane is selected from but not limited to one or more of methyltrimethoxysilane, methyltriethoxysilane, and dimethyldimethoxysilane. In this embodiment, the silicon The oxanes include methyltrimethoxysilane and methyltriethoxysilane, the purity of which is not less than 99.0%, to prevent impurities from affecting the effect.

[0028] As an optional embodiment, the solvent is selected from but not limited to one or more of n-butyl acetate, n-butyl ether, xylene, in this embodiment, the solvent is n-butyl acetate, Its purity is not less than 99.5%, to avoid impurities affecting the effect.

[0029] The thermoplastic resin is a thermoplastic acrylic ...

Embodiment 2

[0031] Embodiment 2 of the present invention provides an antifouling self-cleaning paint post-treatment agent, which includes the following raw materials in parts by weight: siloxane 10, silane coupling agent 2, polysiloxane oligomer 6, solvent 50 , thermoplastic resin 10, hydroxyl silicone oil 3, polysilazane 20.

[0032] In this embodiment, the siloxane includes methyltrimethoxysilane, methyltriethoxysilane and dimethyldimethoxysilane, the purity of which is not less than 99.0%, to avoid impurities affecting the effect; The solvent is n-butyl ether and xylene, the purity of which is not less than 99.5%, so as to avoid the impact of impurities; the thermoplastic resin is cellulose acetate butyrate with a molecular weight of 20,000-50,000. The hydroxyl mass percentage of the hydroxyl-containing silicone oil is 2-5%.

[0033] Compared with the prior art, the anti-fouling self-cleaning paint post-treatment agent described in the embodiments of the present invention is applied t...

Embodiment 3

[0039] Embodiment 3 of the present invention provides a kind of preparation method of antifouling self-cleaning coating post-treatment agent, it comprises the following specific steps:

[0040] 1) Weigh the raw materials according to the above-mentioned formula quantity, put the siloxane, silane coupling agent and polysiloxane oligomer into the reaction kettle, under the temperature condition of 110-120°C, Disperse evenly and react for 1 hour under the condition of rotating speed;

[0041] 2) Add the thermoplastic resin and hydroxyl-containing silicone oil to the mixture obtained in step 1) while dispersing, disperse evenly and fully react under heating conditions, add the solvent and lower the temperature of the obtained mixture to 5-15°C;

[0042] 3) Add polysilazane to the mixture obtained in step 2) and disperse for 30 minutes at a rotational speed of 800-1000 rpm;

[0043] 4) The mixture obtained in step 3) is filtered with a 5 μm filter bag filter and packaged to obtain...

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Abstract

The invention relates to an antifouling self-cleaning paint post-treatment agent and a preparation method thereof. The anti-fouling self-cleaning paint post-treatment agent is used after the coating system is constructed and cured, and has fast drying, high hardness, anti-fouling self-cleaning performance and The advantages of excellent aging resistance can effectively improve the hardness, anti-fouling self-cleaning performance and aging resistance of the paint coating. The antifouling self-cleaning paint post-treatment agent includes the following raw materials in parts by weight: siloxane 5-10, silane coupling agent 0.5-2, polysiloxane oligomer 3-6, solvent 30-50 , thermoplastic resin 5-10, hydroxyl-containing silicone oil 1-3, polysilazane 10-20; the siloxane is selected from but not limited to methyltrimethoxysilane, methyltriethoxysilane, dimethyl One or more of dimethoxysilanes. The preparation method has reasonable process arrangement and simple operation, is suitable for large-scale industrial mass production, and no harmful substances and irritating odors are generated during the preparation process, and has good environmental friendliness.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to an antifouling self-cleaning coating post-treatment agent and a preparation method thereof. Background technique [0002] At present, most of the industrial low-temperature drying coatings use a double-layer or multi-layer structure of epoxy primer + acrylic polyurethane topcoat system or epoxy primer + fluorocarbon polyurethane topcoat system. [0003] However, both of these two coating processes have relatively prominent shortcomings. The coating process of the epoxy primer + acrylic polyurethane topcoat system is relatively mature and simple, and has high cost performance, but its stain resistance is poor. After a period of time, it is easy to vacuum and superimposed with the aging of the coating, the coating will lose its gloss and become old, and the coating cannot be restored to a relatively new state even if it is cleaned. The epoxy primer + fluorocarbon polyurethane top...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/16C09D183/04C09D133/04C09D5/16C09D7/65
CPCC08L2205/025C08L2205/035C09D5/1675C09D5/1687C09D183/16C08L83/04C08L33/04C08L1/14
Inventor 朱洪江雷焕虎熊达瑜方芳闵建国李淑艳
Owner 广东四方威凯新材料有限公司
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