Polyurethane coating and preparation method and application thereof

A polyurethane coating and butyl ester technology, applied in the coating field, can solve the problems of polyurethane coating adhesion, weather resistance, acid and alkali resistance improvement, etc., and achieve excellent corrosion resistance, excellent salt spray resistance, and enhanced corrosion resistance. Effect

Active Publication Date: 2019-04-09
广东好邦石墨烯新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN 108384429 A discloses a polyurethane coating. The raw materials and components of the polyurethane coating include: 0.25 g of dibenzyl azodicarboxylate, 72 g of polytetrahydrofuran ether glycol, 18 g of hexamethylene diisocyanate, Triazaborane 0.68g, methyl ethyl ketone 8.8g, modified manganese hypophosphite 1g, 4-carboxyphenylboronic acid 3.2g, N-hydroxysulfosuccinimide 3.5g, triethylamine 7.8g and water 70g, to obtain flame retardant , waterproof and low-VOC polyurethane coatings, but this invention did not make polyurethane coatings have a great improvement in adhesion, weather resistance, acid and alkali resistance, etc.

Method used

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  • Polyurethane coating and preparation method and application thereof
  • Polyurethane coating and preparation method and application thereof
  • Polyurethane coating and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] In the present embodiment, a kind of polyurethane coating is provided, and described polyurethane coating comprises A component and B component that mass ratio is 4:1;

[0045] The A component includes the following components in weight percent:

[0046]

[0047]

[0048] The B component is an isocyanate curing agent, ie toluene diisocyanate.

[0049] Wherein said modified graphene oxide is graphene oxide modified by silane coupling agent, and its preparation method is as follows:

[0050] Disperse 6g of graphene oxide after drying in 500mL, DMF (N,N-dimethylformamide) solvent, ultrasonically disperse for 30min to make graphene oxide dispersion liquid, then add 100g KH550 (γ-aminopropyl Triethoxysilane), heated to 80°C, and stirred for 12 hours. After the reaction was completed, it was washed with deionized water three times and centrifuged, and the product was dried in vacuum to obtain the modified graphene oxide.

[0051] The preparation method of the polyuret...

Embodiment 2

[0053]In the present embodiment, a kind of polyurethane coating is provided, and described polyurethane coating comprises A component and B component that mass ratio is 4:1;

[0054] The A component includes the following components in weight percent:

[0055]

[0056]

[0057] The B component is an isocyanate curing agent, ie toluene diisocyanate.

[0058] Wherein said modified graphene oxide is graphene oxide modified by silane coupling agent, and its preparation method is as follows:

[0059] Disperse 6g of graphene oxide after drying in 180mL, DMF (N,N-dimethylformamide) solvent, ultrasonically disperse for 25min to make graphene oxide dispersion liquid, then add 100g KH550 (γ-aminopropyl Triethoxysilane), heated to 70°C and stirred for 20 hours. After the reaction was completed, it was washed with deionized water three times and centrifuged, and the product was dried in vacuum to obtain the modified graphene oxide.

[0060] The preparation method of the polyuretha...

Embodiment 3

[0062] In the present embodiment, a kind of polyurethane coating is provided, and described polyurethane coating comprises A component and B component that mass ratio is 9:1;

[0063] The A component includes the following components in weight percent:

[0064]

[0065]

[0066] The B component is an isocyanate curing agent, ie toluene diisocyanate.

[0067] Wherein said modified graphene oxide is graphene oxide modified by silane coupling agent, and its preparation method is as follows:

[0068] Disperse 6g of graphene oxide after drying in 300mL, DMF (N,N-dimethylformamide) solvent, ultrasonically disperse for 40min to make graphene oxide dispersion liquid, then add 100g KH550 (γ-aminopropyl Triethoxysilane), heated to 900°C, stirred for 5 hours, after the reaction was completed, washed with deionized water for 3 times and centrifuged, and the product was dried in vacuum to obtain the modified graphene oxide.

[0069] The preparation method of the polyurethane coatin...

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Abstract

The invention provides a polyurethane coating and a preparation method and an application thereof. The polyurethane coating comprises a component A and a component B. The component A is prepared fromthe following components in percent by weight: 10-30% of a solvent, 2-8% of diformate, 45-75% of polyhydric alcohols, 0.5-45 of modified graphene oxide, 15-35% of titanium dioxide, 0.1-1% of polyamidewax, 0.1-1% of bentonite and 0.5-2% of an auxiliary agent. The component B is an isocyanate curing agent. By adding the modified graphene oxide into the component A, matching the modified graphene oxide with other components of the component A and the component B to prepare the polyurethane coating, the prepared coating is high in adhesive force, quite excellent in acid resistance, alkali resistance and salt spray resistance, is used for corrosion resistance of an outdoor steel structure, has excellent corrosion resistance and is safe and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to a polyurethane coating and a preparation method and application thereof. Background technique [0002] Metals are easy to be corroded in various complex environments. In order to prevent corrosion of metal structures, coating anti-corrosion coatings on its surface can effectively solve this problem. On the one hand, it has excellent performance, and on the other hand, it must ensure the safety and environmental protection of the coating. [0003] CN 108384429 A discloses a polyurethane coating. The raw materials and components of the polyurethane coating include: 0.25 g of dibenzyl azodicarboxylate, 72 g of polytetrahydrofuran ether glycol, 18 g of hexamethylene diisocyanate, Triazaborane 0.68g, methyl ethyl ketone 8.8g, modified manganese hypophosphite 1g, 4-carboxyphenylboronic acid 3.2g, N-hydroxysulfosuccinimide 3.5g, triethylamine 7.8g and water 70g, to obtain flame retardan...

Claims

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Application Information

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IPC IPC(8): C09D175/04C09D5/08C09D7/61C09D7/62C09D7/20
CPCC08K2003/2241C08L2201/08C09D5/08C09D175/04C09D7/20C09D7/61C09D7/62C08L77/00C08K13/06C08K9/06C08K3/22C08K3/042C08K3/346
Inventor 姚永健荣仲尼
Owner 广东好邦石墨烯新材料科技有限公司
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