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A weather-resistant self-cleaning self-layering coating and its preparation method and application

A self-cleaning and self-layering technology, applied in anti-corrosion coatings, epoxy resin coatings, anti-fouling/underwater coatings, etc., can solve the problems of substrate adhesion, poor reactivity, and lack of active hydroxyl groups that affect the cross-linking density of coatings, etc. problems, to achieve the effect of reducing the surface energy of the coating, high mechanical properties, and high corrosion resistance

Active Publication Date: 2022-04-01
INST OF CHEM ENG GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the silanol-terminated polydimethylsiloxane selected by this technical scheme has poor reactivity because the active functional group is silanol, and the fluorocarbon ester-antifouling monomer telomer used in it lacks active hydroxyl groups, which affects The crosslink density of the coating and the adhesion to the substrate

Method used

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  • A weather-resistant self-cleaning self-layering coating and its preparation method and application
  • A weather-resistant self-cleaning self-layering coating and its preparation method and application
  • A weather-resistant self-cleaning self-layering coating and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0043] 80g carbon alcohol-terminated polydimethylsiloxane (R=-CH 3 , n=3, m=3), 120g hydroxyl fluorocarbon resin (hydroxyl value 45mgKOH / g), 80g epoxy resin E20, 80g cyanite CYMEL 1156 curing agent, 0.8g King's NACURE 2500 catalyst and 439.2g xylene in Stir, mix and react at room temperature at 300 r / min for 30 minutes to obtain a weather-resistant self-cleaning and self-layering coating.

Embodiment 2

[0045] 135g carbon alcohol terminated polydimethylsiloxane (R=-(CH 2 ) 6 CH 2 OH, n=15, m=6), 225g hydroxyl fluorocarbon resin (hydroxyl value 60mgKOH / g), 72g epoxy resin E44, 180g cyanite CYMEL 325 curing agent, 4.5g King's NACURE 2107 catalyst and 103.5g propylene glycol methyl Ether acetate and 180 g of ethyl acetate were stirred, mixed and reacted at room temperature at 100 r / min for 60 minutes to obtain a weather-resistant self-cleaning self-layering coating.

Embodiment 3

[0047] 135g carbon alcohol terminated polydimethylsiloxane (R=-(CH 2 ) 19 CH 3 , n=50, m=12), 270g hydroxyl fluorocarbon resin (hydroxyl value 30mgKOH / g), 45g epoxy resin E51, 135g cyanate CYMELXW3106 curing agent, 4.5g King's NACURE 5414 catalyst and 310.5g butyl acetate in Stir, mix and react for 10 minutes at room temperature at a speed of 500 r / min to obtain a weather-resistant self-cleaning self-layering coating.

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Abstract

The invention discloses a weather-resistant self-cleaning self-layering paint and its preparation method and application. The weather-resistant self-cleaning self-layering paint includes the following preparation raw materials: carbon alcohol-terminated polydimethylsiloxane, hydroxyl fluorocarbon resin, ring Oxygen resin, curing agent. The present invention introduces high-activity carbon alcohol-terminated polydimethylsiloxane and epoxy resin on the basis of high-temperature curing hydroxyl fluorocarbon resin, and due to epoxy resin, fluorocarbon resin and carbon alcohol-terminated The mutual incompatibility and surface energy difference between the silicone chain segments of polydimethylsiloxane, the epoxy resin is enriched in the bottom layer and combined with the metal substrate, the fluorocarbon resin is enriched in the middle layer, and the carbon The silicone segment of alcohol-terminated polydimethylsiloxane is enriched on the surface to form a surface silicone layer, forming a three-layer microphase-separated self-layering coating, which has high weather resistance, self-cleaning, self-layering, and low surface energy. , hydrophobic and oleophobic, stain resistance, strong adhesion and other characteristics.

Description

technical field [0001] The invention belongs to the technical field of functional coatings, in particular to a weather-resistant self-cleaning self-layering coating and its preparation method and application. Background technique [0002] In the coatings industry, since most single-layer coatings cannot achieve good protection and decoration effects, usually the surface of the object to be coated needs to be coated with multi-layer coatings to meet the requirements. However, each layer needs to be constructed separately, the construction process is many, the time is long, and the cost is high. There may be disadvantages such as weak interlayer bonding force and short service life between different layers. In 1976, Funke et al. proposed a new concept - self-layered coatings. Self-layering coating oil is composed of two (or more) incompatible polymers. After one coating and construction on the substrate, it can spontaneously and directly produce phase separation, which is div...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D127/12C09D163/00C09D161/32C09D5/08C09D5/16
CPCC09D183/04C09D127/12C09D5/08C09D5/1675C09D5/1668C09D5/1662C08L83/04C08L63/00C08L61/32C08L27/12
Inventor 余龙飞郑小珊陈佳志麦裕良贾康乐李欢玲李锌娜李少清
Owner INST OF CHEM ENG GUANGDONG ACAD OF SCI
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