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Two-component polyurethane coating as well as preparation method and application thereof

A two-component polyurethane and coating technology, applied in the coating field, can solve the problems of poor insulation performance, slow cross-linking reaction rate, and inability to apply electrical insulation materials, etc., to achieve good adhesion, good dimensional stability, and prevent leakage Effect

Active Publication Date: 2021-03-09
QINGYUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the bridging effect of nano-boron nitride on polyimide, the polyurethane insulating material is organically covalently modified with polyurethane, which improves the interfacial compatibility and dispersion of the two. However, the crosslinking reaction rate is slow and cannot The curing time is fast, and the weather resistance, heat resistance and insulation properties of the polyimide modified polyurethane insulation material with this structure need to be improved
[0004] CN110698117A discloses a preparation method of thermal insulation coating, the thermal insulation coating calcium silicate powder, filler, binder, silica airgel, polyimide powder, polyurethane prepolymer, curing agent, The prepared calcium silicate thermal insulation coating is environmentally friendly and has good adhesion and thermal insulation performance. However, the crosslinking reaction rate is slow, it cannot be cured quickly, and the insulation performance is poor. Cannot be used in the preparation of electrical insulation materials

Method used

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  • Two-component polyurethane coating as well as preparation method and application thereof
  • Two-component polyurethane coating as well as preparation method and application thereof
  • Two-component polyurethane coating as well as preparation method and application thereof

Examples

Experimental program
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Effect test

preparation example

[0061] The local preparation example provides the polyimide represented by Formula I, and the polyimide shown in Formula I is prepared from the following preparation method: 4,4'-di (4-aminophenoxy) biphenyl (0.1 mol, 36.8 g) was dissolved in DMF (200 mL), and phthalic anhydride (0.2 mol, 29.6 g) was added, and the mixture was mixed, then toluene mixed, 10 ° C was heated and refluxed for 4 h, separated from benzene The solvent and DMF were allowed to cool after crystalline crystalline (5.86 g, purity 98%, yield 92.3% yield).

[0062] The sources of each component are as follows: isocyanate is purchased in (manufacturers: Dugguai Chemical Co., Ltd., brand IPDI), super branched polyol purchase (manufacturer: Perstorp, brand Boltorn H20), catalyst purchase ( Manufacturer: Shanghai Nanxiang Reagent Co., Ltd., brand DBTDL Company, brand MDEA), pigment purchases in (manufacturers: Anhui black color new materials, cards HY330), UV light absorbers are purchased in (manufacturers: Yongluo,...

Embodiment 1

[0064] This embodiment provides a two-component polyurethane coating comprising a component and a component B component, the composition of the A component and the B component is shown below, wherein a component and group B The weight ratio of points is 1: 2:

[0065]

[0066] The preparation method includes the step of mixing an isocyanate, a polyol, a catalyst, and a storage stabilizer in the preparation of the A component, and the reaction is heated at 80 ° C for 3 h at 80 ° C to obtain a prepolymer containing an end isocyanate group. Further, stirring with polyimide at 80 ° C to obtain the A component; a polyol, crosslinking agent, pigment, ultraviolet absorber, auxiliary agent, a pigment, an ultraviolet absorber and aid in the preparation of B components in the formulation. The mixture was mixed at ° C to give the B component.

Embodiment 2

[0068] This embodiment provides a two-component polyurethane coating comprising a component and a component B component, the composition of the A component and the B component is shown below, wherein a component and group B The weight ratio of points is 1: 2:

[0069]

[0070] The preparation method includes the step of mixing an isocyanate, a polyol, a catalyst, and a storage stabilizer in the preparation of the A component, and the reaction is heated at 80 ° C for 3 h at 80 ° C to obtain a prepolymer containing an end isocyanate group. Further, stirring with polyimide at 80 ° C to obtain the A component; a polyol, crosslinking agent, pigment, ultraviolet absorber, auxiliary agent, a pigment, an ultraviolet absorber and aid in the preparation of B components in the formulation. The mixture was mixed at ° C to give the B component.

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Abstract

The invention provides a two-component polyurethane coating as well as a preparation method and application thereof. The two-component polyurethane coating is prepared from a component A and a component B. The component A is prepared from isocyanate, polyhydric alcohol and polyimide, and the component B is prepared from polyhydric alcohol, a cross-linking agent and a pigment, wherein the structural formula of polyimide is shown as the following formula I in the specification. Polyimide shown in the formula I is introduced into the polyurethane coating, and polyurethane is subjected to blendingmodification, so that the double-component polyurethane coating has good weather resistance, heat resistance and insulation, the outdoor characteristic of the double-component polyurethane coating isremarkably improved, and the performance requirement of an electric appliance insulating material is met.

Description

Technical field [0001] The present invention belongs to the technical field of coatings, and more particularly to a two-component polyurethane coating and a preparation method thereof. Background technique [0002] Polyurethane materials are currently a widely used material in the market, with good resistance to corrosion resistance, waterproof and penetration, wear resistance, etc. As a new type of material, there is also a wide range of applications in electrical equipment and facilities. However, its insulation performance is good and determines the stability and safety of equipment. The quality of the insulation performance is required to have a high crosslink density after curing of the polyurethane material, which is solidified by a linear liquid to be traced, and the material itself is also an important role in the insulation characteristics of the material itself. Conventional modification is mainly nano-inorganic materials such as silica, titanium dioxide, montmorillonit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/06C09D179/08C09D5/25C08G73/10C08G18/10C08G18/32C08G18/42
CPCC09D175/04C09D175/06C08G73/1007C08G73/1071C08G18/10C08G18/3206C08G18/4283C08L2201/08C08L2203/20C08L79/08
Inventor 马大亮宁文保温锐兴王大成叶金桥
Owner QINGYUAN POWER SUPPLY BUREAU OF GUANGDONG POWER GRID CO LTD
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