Organic-inorganic composite coating composition, and zinc-plated steel sheet surface-treated using same

A technology of galvanized steel sheet and composition, which is applied to devices, coatings, conductive coatings and other directions for coating liquid on the surface, can solve problems such as difficulty in ensuring surface conductivity, deterioration of equipment appearance, and degradation of coating film performance, etc. Excellent workability, improved electrical conductivity, and low curing temperature effects

Inactive Publication Date: 2021-06-22
浦项股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the former case, the purpose can be achieved, but there occurs a problem that it is difficult to secure the surface conductivity for securing the electromagnetic wave shielding property required in the electric and electronic field
The latter method has the problem that not only a precise thin-film coating process for securing surface conductivity but also equipment capable of double-layer coating is required since it consists of primer and top-coat coating
[0005] In addition, the organic-inorganic composite resin-coated steel sheet is mainly used as an electromagnetic sheet, and the deterioration of the coating due to the heat generated inside the equipment often causes discoloration.
In the above case, the performance of the coating film is lowered, and the appearance of the equipment is deteriorated, which will become a factor of customer dissatisfaction
In general, there are many cases where a composition that does not use an aromatic ring compound that causes discoloration due to deterioration is used, but there is a problem that there is no effect

Method used

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  • Organic-inorganic composite coating composition, and zinc-plated steel sheet surface-treated using same
  • Organic-inorganic composite coating composition, and zinc-plated steel sheet surface-treated using same
  • Organic-inorganic composite coating composition, and zinc-plated steel sheet surface-treated using same

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Experimental program
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Effect test

Embodiment 1 to Embodiment 36

[0065] When preparing the composite coating composition, a polyurethane emulsion resin with a glass transition temperature of -28°C and a number-average molecular weight of 50,000 and hydrolyzed ureidopropyl triethylate were sequentially added as the main compounds with the composition shown in Table 1. Oxysilane (Ureidopropyltriethoxysilane), carbodiimide compound (Silia Carbodiimide (Silia Carbodiimide), SiliCycle Co., Ltd.), titanium fluoride compound and ferrocene compound (vinylferrocene, Aldrich Chemical Co.) as additives, polysiloxane-based dispersant and surface modification permanent polyethylene wax (PE WAX) and the rest of pure water, and aged for 24 hours to prepare an organic-inorganic composite coating composition with a pH of 5±0.5.

[0066] Afterwards, using a roll coater, the prepared composition is coated on the galvanized steel sheet and baked and dried so that the temperature of the steel sheet reaches 150° C., thereby preparing a coating with an adhesio...

experiment example

[0075] As far as the quality evaluation of coated steel sheets is concerned, the physical properties required for chromium-free fingerprint-resistant steel sheets are evaluated, such as solution stability, corrosion resistance, processing blackening, chemical resistance, electrical conductivity, heat resistance, high temperature Humidity, etc., and each physical property was measured by the following method.

[0076] 1. Solution stability

[0077] In order to measure the solution stability of the composite coating composition solution, the initial viscosity (η i ). After being placed in an oven at 50°C for 5 days, it was cooled to normal temperature, and after stirring at normal temperature for 10 days, the final viscosity (η f ), calculate the change value of the viscosity, and evaluate according to the evaluation standard. The evaluation results of the solution stability are shown in Table 3 and Table 4.

[0078]Dη=(η f -η i ) / η i ×100(%)

[0079]

[0080] ◎: Dη is...

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Abstract

The present invention provides an organic-inorganic composite resin composition for coating the surface of a zinc-plated steel sheet, comprising 5-25 wt% of a polymer resin, 4-20 wt% of a silane compound, 3-10 wt% of a curing agent and 0.1-2 wt% of ferrocene compound on the basis of the total weight of the composition.

Description

technical field [0001] The invention relates to a self-crosslinking organic-inorganic composite coating composition with excellent electrical conductivity and a composite coated steel plate using the composition for surface treatment. Background technique [0002] Galvanized steel sheets used as panels for household appliances and mainly used as inner panels shall have the following core quality characteristics. First, it should have corrosion resistance that can be used in various corrosive environments. Most galvanized steel sheets require corrosion resistance of coatings used to protect materials in corrosive environments, such as transportation to customers after manufacturing, processing processes used to manufacture products, corrosive environments from when consumers start using products to disposal . Second, it should have surface conductivity. Electromagnetic waves generated when household appliances are in operation are absorbed into the surface of the steel pla...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D7/63C09D175/04C09D167/00C09D163/00C09D7/61B05D7/14B05D7/24C09D7/40
CPCC09D7/61C09D7/63C09D175/04C08G2150/90B05D2202/10H01B1/02C08K3/16C09D5/082C09D163/00C08K5/56C08K5/29C08K5/5445C08G59/4042C08K7/16C08K3/08C08K3/11C08L91/06C08L23/06C08L83/04C08K5/544C08K5/54C08K3/24C09D7/40C09D167/00B05D7/14B05D7/24B05D2503/00B05D2504/00C09D7/65C09D5/022C09D5/24
Inventor 赵斗焕姜春镐
Owner 浦项股份有限公司
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