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Greenhouse thin film water-based hydrophobic coating as well as preparation method and application thereof

A hydrophobic coating and water-based technology, applied in the coating and other directions, can solve the problems that the adhesion between the coating and the film needs to be improved, it is not easy to popularize and apply on a large scale, and the curing temperature of the hydrophobic coating is high. The effect of stability and short preparation time

Inactive Publication Date: 2018-05-11
JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two ways to modify the shed film: (1) Internal addition method, adding anti-aging agent, heat preservation agent, anti-fogging agent and other additives to the raw material of the shed film. The production process is simple, but there are compatibility problems between raw materials and additives (2) multi-layer composite method, coating dust-proof layer, heat-insulation layer, anti-fog layer and other coatings on the basis of the original greenhouse film, the hydrophobic and anti-fog performance Good, but the process is complicated, and the adhesion between the coating and the film needs to be improved
[0003] Chinese patents CN104559617B and CN104479270B both disclose a water-based fluorocarbon coating and a preparation method thereof, but the curing temperature of these two hydrophobic coatings is relatively high, the preparation process is complicated, and it is not easy to be widely applied; Chinese patents CN105462479B and CN105385342A are respectively A water-based weather-resistant and waterproof fluorocarbon coating and its preparation method are disclosed, but both coatings need to be reacted and catalyzed at a relatively high temperature, and the preparation time is long, and the production process is time-consuming and laborious

Method used

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  • Greenhouse thin film water-based hydrophobic coating as well as preparation method and application thereof
  • Greenhouse thin film water-based hydrophobic coating as well as preparation method and application thereof
  • Greenhouse thin film water-based hydrophobic coating as well as preparation method and application thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Add 57g of modified fluorocarbon resin to the beaker, while stirring continuously with a glass rod, add 2.4g of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.5g of fatty acid ester Sulfate, 0.3g polydimethylsiloxane silicone oil, 1.0g polysilane containing ammonia functional group, placed on a magnetic stirrer, set the speed at 200r / min, room temperature, stirred for 10min, fully reacted, mixed evenly; add 3.8g Toluene diisocyanate, placed on a magnetic stirrer, set the speed at 800r / min, room temperature, stirred for 30min, fully reacted, mixed evenly; then added 35g of liquid paraffin, set the speed at 200r / min, room temperature, stirred for 15min, fully reacted, mixed evenly , and then filtered with 300-mesh gauze to make a mixed emulsion of water-based hydrophobic paint; add 3% deionized water and dilute to the construction viscosity; use a 9# coating stick to scrape on the plastic film, and let it stand for 5 minutes at room temperature; Put the film coated wi...

Embodiment 2

[0036] Add 34g of modified fluorocarbon resin to the beaker, while stirring continuously with a glass rod, add 1.75g ​​of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.3g of polyether silicon Oxane copolymer, 0.25g polydimethylsiloxane silicone oil, 0.2g polyacrylamide, 0.7g amino functional polysilane, finally add 0.05g polydimethylsiloxane silicone oil, place on a magnetic stirrer , set the speed at 300r / min, room temperature, stir for 12min, fully react, and mix evenly; add 2.25g of toluene diisocyanate, place it on a magnetic stirrer, set the speed at 900r / min, room temperature, stir for 35min, fully react, and mix evenly; Add 10.5g of liquid paraffin, set the speed at 300r / min, room temperature, stir for 12min, fully react, mix evenly, and then filter with 250 mesh gauze to make a mixed emulsion of water-based hydrophobic coating; add 5% deionized water and dilute to the construction viscosity ; Use a 14# film stick to scrape and coat the plastic film, and let it sta...

Embodiment 3

[0039]Add 19g of modified fluorocarbon resin to the beaker, while stirring continuously with a glass rod, add 1.1g of 2,2,4-trimethyl-1,3-pentanediol monoisobutyrate, 0.15g of polyoxyethylene Mixed emulsion of copolymer and polyether siloxane copolymer, 0.15g polyether polyester modified organosiloxane, 0.2g aminoalcohol complex titanate, 0.4g amino functional polysilane, and finally add 0.04 g polyether modified methyl siloxane silicone oil, placed on a magnetic stirrer, set the speed at 400r / min, room temperature, stirred for 15min, fully reacted, mixed evenly; added 1.4g diphenylmethane diisocyanate, placed on a magnetic stirrer On the device, set the speed at 900r / min, room temperature, stir for 35min, fully react, and mix evenly; then add 2.56g of liquid paraffin, set the speed at 400r / min, room temperature, stir for 12min, fully react, mix evenly, and then filter with 240 mesh gauze , to make a mixed emulsion of water-based hydrophobic paint; add 6% deionized water and d...

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Abstract

The invention discloses a water-based hydrophobic coating as well as a preparation method and application thereof. The coating comprises the following components in mass fraction: 57-80% of modified fluorocarbon resin, 2.4-4.8% of coalescing agent, 0.5-0.8% of base material wetting agent, 0.3-0.8% of leveling agent, 0-0.2% of antifoaming agent, 0-1% of thickener, 1-2% of hydrophobic agent, 3.8-7.7% of curing agent, and the balance liquid paraffin. The prepared fluorocarbon resin water-based hydrophobic coating has excellent film forming property and hydrophobicity, has high coating adhesion, is safe and environment-friendly, has simple process, and is easy for industrial production and large-scale popularization and application.

Description

[0001] The invention belongs to the field of hydrophobic paint preparation technology and surface treatment, and in particular relates to a greenhouse film water-based hydrophobic paint and its preparation method and application. Background technique [0002] At present, my country's agricultural plastic film is used in a large amount. Among them, the product structure of shed film is developing towards multi-layer composite, and its performance tends to be functionalized such as high light transmission, high heat preservation, high strength, long life, and continuous anti-fog period and dust-proof period. and integration. There are two ways to modify the shed film: (1) Internal addition method, adding anti-aging agent, heat preservation agent, anti-fogging agent and other additives to the raw material of the shed film. The production process is simple, but there are compatibility problems between raw materials and additives (2) multi-layer composite method, coating dust-proof ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D127/12C09D127/18C09D7/63C09D7/65
Inventor 蒋希芝徐磊夏礼如
Owner JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
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