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Two-component water-based epoxy coating as well as preparation method and application thereof

A water-based epoxy coating, water-based epoxy technology, applied in epoxy resin coatings, anti-fouling/underwater coatings, coatings, etc., can solve problems such as insufficient stain resistance and poor stability, and achieve anti-fouling effects Good, meet the high cleanliness decoration requirements, improve the effect of stability

Active Publication Date: 2018-06-15
GUANGZHOU LEOBO PAINT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the waterborne epoxy coatings on the market today still generally have defects such as poor stability, water resistance, scrub resistance, and insufficient stain resistance.

Method used

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  • Two-component water-based epoxy coating as well as preparation method and application thereof
  • Two-component water-based epoxy coating as well as preparation method and application thereof
  • Two-component water-based epoxy coating as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 5

[0066] Waterborne epoxy resin II described in embodiment 5 is prepared as follows:

[0067] S1. Put 190 parts of epoxy resin E-44 into a four-necked flask, start stirring and slowly raise the temperature to 55°C to stop the temperature rise, add 90 parts of TDI, heat it up to 60°C for 40 minutes, and then add 160 parts of IPDI measured Add 4 drops of bismuth isooctanoate dropwise to a four-necked flask, and slowly raise the temperature to 68±2°C for 90 minutes;

[0068] S2. Add 50 parts of PCL with a molecular weight of 1500-2000 and 30 parts of 1,6-hexanediol into the four-neck flask, and keep warm at 68±2°C for 60 minutes;

[0069] S3. Add 38 parts of DMBA dissolved in DMF, add dropwise 4 drops of stannous octoate and incubate at 68±2°C for 2 hours;

[0070] S4. The content of NCO in the system is detected by the di-n-butylamine method. When the NCO content reaches 3.5-4.0%, add 52 parts of epoxy resin E-51 and keep it at 66-68°C for 60 minutes, then raise the temperature t...

Embodiment 6

[0072] Waterborne epoxy resin III described in embodiment 6 is prepared as follows:

[0073] S1. Put 170 parts of epoxy resin E-44 into a four-necked flask, start stirring and slowly raise the temperature to 55°C to stop the temperature rise, add 70 parts of TDI, heat it up to 60°C for 40 minutes, and then add 150 parts of IPDI measured Add 3 drops of bismuth isooctanoate dropwise to a four-necked flask, and slowly raise the temperature to 68±2°C for 90 minutes;

[0074] S2. Add 40 parts of PCL with a molecular weight of 1500-2000 and 40 parts of 1,6-hexanediol into the four-necked flask, and keep warm at 68±2°C for 60 minutes;

[0075] S3. Add 35 parts of DMBA dissolved in DMF, drop 3 drops of stannous octoate, and keep warm at 68±2°C for 2 hours;

[0076] S4. The content of NCO in the system is detected by the di-n-butylamine method. When the NCO content reaches 1.8-2.45%, add 75 parts of epoxy resin E-51 and keep it at 66-68°C for 60 minutes, then raise the temperature to ...

Embodiment 1

[0079] A two-component waterborne epoxy interior wall paint, its composition and preparation method are as follows:

[0080] Component A

[0081]

[0082] Add deionized water into the dispersion tank, add the above materials while stirring, stir and disperse at 1200rpm until the slurry fineness is less than 30um, and disperse normally for 60min.

[0083] Component B

[0084]

[0085] Put each material into the feed kettle in order, adjust the stirring speed to 800rpm, stir and disperse for 30min. Filtering and packaging can get 100 parts by mass of component B of the two-component interior wall paint.

[0086] Before painting, according to the mass ratio of 1:1, mix A and B components evenly, then add about 10% of the total amount of A and B water, and effectively disperse for more than 2 minutes, then you can get shell light, good stain resistance and decorative effect Excellent, two-component water-based epoxy interior wall coating with good scrub resistance and goo...

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Abstract

The invention discloses a two-component water-based epoxy coating as well as a preparation method and application thereof. The two-component water-based epoxy coating includes an A component and a B component, wherein the A component comprises the following materials in parts by mass: 20-36 parts of deionized water, 1-4 parts of auxiliary agent 1, 22-50 parts of a pigment filler, and 25-40 parts of a water-based epoxy curing agent; and the B component comprises the following materials in parts by mass: 10-40 parts of deionized water, 0.8-2 parts of auxiliary agent 2, and 50-90 parts of self-prepared water-based epoxy resin. The two-component coating provided by the invention can meet needs of interior decoration, can be used as a water-based epoxy wall surface paint, has a good anti-fouling effect and strong isolation, and can meet high-cleanness decoration requirements.

Description

technical field [0001] The invention relates to the field of architectural coatings, in particular, the invention relates to a two-component coating and a preparation method and application thereof. technical background [0002] In 2016, the demand for paint in my country was as high as 18 million tons, of which the amount of water paint accounted for only 10%, while the proportion of water paint in European and American countries has reached 80%. As the world's largest paint country, my country has unlimited market space for water paint and water-based paint. It is a major trend in the current coating industry. Epoxy resins are widely used in the coating industry, but most of them are solvent-based, requiring a large amount of organic solvents such as ketones and aromatic hydrocarbons as diluents, which have a strong odor and are easy to volatilize, causing great pollution to the surrounding environment. As people pay more and more attention to the environment and have high...

Claims

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Application Information

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IPC IPC(8): C09D163/00C09D5/16C09D7/61C08G59/14C08G59/16
CPCC08G59/1438C08G59/1455C08G59/1477C08G59/1494C08K2003/2241C09D5/1662C09D5/1687C09D163/00C08K3/22C08K3/346C08K3/34
Inventor 张胜王振兴
Owner GUANGZHOU LEOBO PAINT TECH
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