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Polyurea coating, coating and preparation method thereof

A technology of polyurea and paint, applied in the field of paint, can solve the problems of insufficient hydrophobicity, poor color retention, slow reaction and weather resistance, etc., and achieve the effect of increasing gloss and color retention

Active Publication Date: 2021-06-22
SUN YAT SEN UNIV
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  • Claims
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Problems solved by technology

[0004] Polyaspartic ester coating is a kind of aliphatic, slow response, high weather resistance and high performance coating developed in the field of polyurea in recent years. It is called the third generation polyurea, but the polyurea currently on the market Aspartate coatings have disadvantages such as poor color retention, fast reaction speed, and insufficient hydrophobicity

Method used

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  • Polyurea coating, coating and preparation method thereof
  • Polyurea coating, coating and preparation method thereof
  • Polyurea coating, coating and preparation method thereof

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[0034] After carrying out component weighing according to table 1 and table 2, the preparation method of polyurea coating described in embodiment, comprises the steps:

[0035] (1) Mix the A component uniformly, and add it to the uniformly mixed B component to obtain the polyurea coating;

[0036] (2) After uniformly mixing the polyurea coating obtained in step (1), spray, manually brush or roll coat it on the metal within 90 minutes to obtain the polyurea coating.

[0037] Wherein, in component A, the preparation method of the organofluorosilicon-modified polyaspartate resin comprises the following steps:

[0038] (1) After mixing polyaspartic acid ester resin, γ-aminopropyltrialkoxysilane and trifluoropropylmethylcyclotrisiloxane, pass inert gas, after 5min, heat up to 55°C, Diethyl maleate was added dropwise with stirring to obtain a mixture;

[0039] (2) Heat the mixture for 10 hours, the heat preservation temperature is 55° C., and obtain the organofluorosilicon-modifie...

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Abstract

The invention discloses a polyurea coating, a coating and a preparation method thereof, and relates to the technical field of coatings. The polyurea coating comprises a component A, and the component A is a mixture of resin, pigment filler and auxiliaries and comprises the following components in parts by weight: 60-90 parts of organic fluorine-silicon modified polyaspartic acid ester resin, 20-40 parts of pigment filler and 1-5 parts of auxiliaries; the preparation method of the organic fluorine-silicon modified polyaspartic acid ester resin comprises the following steps: (1) mixing polyaspartic acid ester resin, gamma-aminopropyl trialkoxysilane and trifluoropropyl methyl cyclotrisiloxane, introducing inert gas, heating to 50-60 DEG C after 5-10 minutes, and dropwise adding diethyl maleate while stirring to obtain a mixture; and (2) carrying out heat preservation reaction on the mixture for 8-16 hours, and cooling to obtain the organic fluorine-silicon modified polyaspartic acid resin.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a polyurea coating, a coating and a preparation method thereof. Background technique [0002] Waterproof coating refers to a kind of coating that the coating film formed by coating can prevent rainwater or groundwater from seeping. At present, there are two types of waterproof materials on the market: one is polyurethane waterproof coating, but when using this coating, it is generally diluted with organic solvents such as toluene and xylene, so it is also toxic; the other is polymer Cement-based waterproof coating, which is composed of emulsions synthesized by various water-based polymers and high-quality cement mixed with various additives. The flexibility of the polymer (resin) and the rigidity of the cement are integrated, making it excellent in impermeability and stability. However, the current polymer cement-based coatings generally have poor mechanical properties and poor...

Claims

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Application Information

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IPC IPC(8): C09D175/02C09D7/61C09D5/08
CPCC09D175/02C09D7/61C09D5/08C08K2003/2241C08K3/22C08K3/346C08K3/34
Inventor 李伟华刘睿曹文凯
Owner SUN YAT SEN UNIV
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