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Metal surface treatment agent for galvanized steel, coating method and coated steel

A metal surface treatment, steel technology, applied in the direction of metal material coating technology, metal layered products, chemical instruments and methods, etc., can solve the problems of insufficient alkali resistance and achieve the effect of improving the oil resistance of pressure machines

Active Publication Date: 2018-12-04
NIPPON PAINT SURF CHEM +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the alkali resistance of the above-mentioned surface treatment liquid for galvanized metal materials is insufficient.

Method used

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  • Metal surface treatment agent for galvanized steel, coating method and coated steel
  • Metal surface treatment agent for galvanized steel, coating method and coated steel
  • Metal surface treatment agent for galvanized steel, coating method and coated steel

Examples

Experimental program
Comparison scheme
Effect test

manufacture example 1

[0117] (Manufacture of resin pellets (a-1))

[0118] Add ethylene-methacrylic acid copolymer resin (80% ethylene content, 20% methacrylic acid content), 5.6% sodium hydroxide and deionized water to the reaction vessel, and stir at 95°C for 6 hours , thereby obtaining a water-dispersed resin solution with a solid content of 23%. To this water-dispersed resin solution, 0.69% of hydrogenated bisphenol A diglycidyl ether (product name: SR-HBA, manufactured by Sakamoto Pharmaceutical Co., Ltd.) and 2-(3,4-epoxycyclohexyl)ethyltrimethyl ether were further added. Oxysilane (product name: KBM-303, manufactured by Shin-Etsu Chemical Co., Ltd.) 1.15%, reacted at 85°C for 2 hours to obtain a silanol group and / or methoxysilyl group with a solid content of 24%. Aqueous dispersion of resin particles (a-1). The average particle diameter of the resin particle (a-1) measured by the particle diameter measuring apparatus FPAR-1000 (made by Otsuka Electronics Co., Ltd.) of the dynamic light sca...

manufacture example 2

[0120] (Manufacture of resin pellets (a-2))

[0121] Add ethylene-methacrylic acid copolymer resin (80% ethylene content, 20% methacrylic acid content), 5.6% sodium hydroxide and deionized water to the reaction vessel, and stir at 95°C for 6 hours , thereby obtaining a water-dispersed resin solution with a solid content of 23%. 0.69% of hydrogenated bisphenol A diglycidyl ether and 0.29% of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane were further added to the water-dispersed resin liquid, and reacted at 85° C. for 2 hours, thereby An aqueous dispersion of resin particles (a-2) having a solid content of 24% and having a silanol group and / or a methoxysilyl group was obtained. The average particle diameter of the resin particle (a-2) measured by the particle diameter measuring apparatus FPAR-1000 (made by Otsuka Electronics Co., Ltd.) of the dynamic light scattering method was 70 nm.

manufacture example 3

[0123] (Manufacture of resin pellets (a-3))

[0124] Add ethylene-methacrylic acid copolymer resin (80% ethylene content, 20% methacrylic acid content), 5.6% sodium hydroxide and deionized water to the reaction vessel, and stir at 95°C for 6 hours , thereby obtaining a water-dispersed resin solution with a solid content of 23%. 0.69% of hydrogenated bisphenol A diglycidyl ether and 5.75% of 2-(3,4-epoxycyclohexyl)ethyltrimethoxysilane were further added to the water-dispersed resin liquid, and reacted at 85° C. for 2 hours, thereby An aqueous dispersion of resin particles (a-3) having a solid content of 24% and having a silanol group and / or a methoxysilyl group was obtained. The average particle diameter of the resin particle (a-3) measured by the particle diameter measuring apparatus FPAR-1000 (made by Otsuka Electronics Co., Ltd.) of the dynamic light scattering method was 70 nm.

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Abstract

The metal surface treatment agent for galvanized steel of the present invention contains organic resin particles (A), silicon oxide particles (B), lithium silicate (C), organic titanium compound (D) and epoxy group-containing compound (E), The aforementioned organic resin particles (A) are resin particles modified with a matrix resin by a silane coupling agent (A‑1) and a polyfunctional epoxy group-containing compound (A‑2), and are resin particles having a silanol group and / or an alkane Oxysilyl resin particles, SiO2-equivalent moles of the total amount of silicon contained in the aforementioned silicon oxide particles (B) and the aforementioned lithium silicate (C) relative to the lithium contained in the aforementioned lithium silicate (C) The Li2O conversion molar number of the element is 40 to 70 times, and the ratio of the mass of the lithium silicate (C) to the mass of the titanium element contained in the organic titanium compound (D) is 0.2 to 200.

Description

technical field [0001] The present invention relates to a metal surface treatment agent for galvanized steel materials, a method of coating the metal surface treatment agent, and coated steel materials. Background technique [0002] For galvanized steel materials, etc., it has been widely used in the past to carry out antirust treatment with chromate such as hexavalent chromate, coat with organic resin that can impart fingerprint resistance, scratch resistance, etc. if necessary, and then top coat each kind of paint. [0003] In recent years, against the background of increasing environmental problems, chromate treatment conventionally performed on steel materials may be restricted or prohibited by law. Since the chromate treatment layer itself has high corrosion resistance and paint adhesion, when the chromate treatment cannot be performed, these performances are significantly reduced. Therefore, it is increasingly required to form a rust-proof layer having excellent corr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C26/00B32B15/04C09D5/08C09D7/45C09D163/00C09D201/00
CPCC09D5/08C09D163/00C09D201/00C23C2/06C23C2/26C09D7/45C09D1/00C09D5/084C09D7/61C09D7/63
Inventor 宇都宫朗宫本禄代东新邦彦森下敦司伊藤大辅
Owner NIPPON PAINT SURF CHEM
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