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Excellent heat-dissipating black resin composition, method for treating a zinc coated steel sheet using the same and steel sheet treated thereby

A technology of black resin and composition, applied in the direction of nanotechnology, carbon nanotubes, nanotechnology, etc. for materials and surface science, can solve the problems of corrosion-resistant surface conductivity limitation, high manufacturing cost, scratches, etc. Achieve the effect of excellent heat absorption/radiation properties and excellent physical properties

Inactive Publication Date: 2009-11-04
POHANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage of this technique is the higher manufacturing cost and the formation of scratches during the calendering process
Recently, there has also been proposed a black resin-coated steel sheet prepared by black-oxidizing the surface of a Zn-Ni steel sheet and coating the steel sheet with a resin composition; but there is a problem in this method that it is difficult Manufactures steel sheets with good and smooth surfaces, and which are limited in producing corrosion resistance and good surface conductivity

Method used

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  • Excellent heat-dissipating black resin composition, method for treating a zinc coated steel sheet using the same and steel sheet treated thereby
  • Excellent heat-dissipating black resin composition, method for treating a zinc coated steel sheet using the same and steel sheet treated thereby
  • Excellent heat-dissipating black resin composition, method for treating a zinc coated steel sheet using the same and steel sheet treated thereby

Examples

Experimental program
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Effect test

Embodiment approach

[0064] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, it should be considered that the descriptions presented herein are preferred embodiments for illustrative purposes only and are not intended to limit the scope of the invention.

Embodiment

[0066] 1. The galvanized steel sheet used in this embodiment

[0067] The one used in this article is coated with 20g / m2 on both sides 2 (Amount of coating on one side) Electrogalvanized steel (EG, steel sheet thickness: 0.8mm) of zinc.

[0068] 2. Preparation of heat-dissipating black resin composition and test samples

[0069] The main resin and the melamine-based curing agent were mixed in a weight ratio of 10:4 to prepare a resin composition. Each of the obtained resin composition, carbon black, matting agent and titanate was mixed in the content range listed in Table 1 below, based on 100 parts by weight of the heat-dissipating composition. As other additives, 1 weight part of polyethylene wax, 2 weight parts of p-toluenesulfonic acid as curing catalyst, 0.5 weight part of BYK-170 TM Pigment anticoagulant (BYKchemie), 0.5 parts by weight of N-methylethanolamine defoamer, 0.5 parts by weight of zinc phosphate as a phosphate-based additive, and 1 part by weight of gamma-...

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Abstract

The present invention provides a heat-dissipating black resin composition having excellent physical properties such as heat-dissipating property, workability, corrosion resistance, solvent resistance, coating adherence and gloss and being free from chromium and used for surface treatment of a zinc coated steel sheet, a method for treating a zinc coated steel sheet, and a zinc coated steel sheet treated thereby. The heat-dissipating black resin composition includes, based on 100 parts by weight of the heat-dissipating black resin composition: 10 to 60 parts by weight of a resin composition which at least one main resin and a melamine-based curing agent are mixed in a weight ratio of 10:2-7, the main resin being selected from the group consisting of polyester resin, epoxy resin, polyolefin resin, polyurethane resin, fluorine resin, phenol resin, acryl resin and polycarbonate resin; 1 to 10 parts by weight of at least one pigment selected from the group consisting of carbon black and carbon nano tube; 1 to 10 parts by weight of a matting agent; and the balance of a solvent. Also, the method for treating a steel sheet with a heat-dissipating black resin composition includes: coating a steel sheet with the heat-dissipating black resin composition so that a thickness of a dry coating film is in a range of 3 to 30 micrometers; and drying the heat-dissipating black resin composition, and the steel sheet is treated according to the method. The resin-coated steel sheet includes a thin resin layer, shows excellent heat- absorbing / dissipating properties, has excellent physical properties such as corrosion resistance, press workability, surface electrical conductivity and solvent resistance, and is environmental- friendly since it is free from a chromium component.

Description

technical field [0001] The present invention relates to a heat-dissipating black resin composition having excellent physical properties such as heat-dissipating properties, workability, and corrosion resistance, a method for treating galvanized steel sheets, and a process whereby The obtained steel sheet; more specifically, to a steel sheet having excellent physical properties (such as heat dissipation properties, workability, corrosion resistance, solvent resistance, coating adhesion and gloss), free of chromium and usable for surface treatment A heat-dissipating black resin composition for galvanized steel sheets, a method for treating galvanized steel sheets, and a galvanized steel sheet treated thereby. Background technique [0002] Recently, due to the increase in heating value (HV) in electronic parts and circuits when producing small electronic devices with high performance and functions, the internal temperature of electronic devices has increased, which has caused m...

Claims

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Application Information

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IPC IPC(8): C08K3/04
CPCB82Y30/00C01B32/158C08K3/041C08K5/34922C08L101/00
Inventor 赵斗焕李在隆卢相杰金辰泰李熙宽
Owner POHANG IRON & STEEL CO LTD
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