B - Operations – Transporting – 32 – B
Patent
B - Operations, Transporting
32
B
B32B 15/08 (2006.01) B05D 7/00 (2006.01) C09D 5/08 (2006.01) C23F 15/00 (2006.01)
Patent
CA 2104058
ABSTRACT The improved organic composite coated steel plate comprises a zinc or zinc alloy plated steel plate as a substrate that has on its surface a chromate film the Cr6+ content of which is no more than 70% of the total Cr content and which is deposited in an amount of 5 - 500 mg/m2 in terms of metallic chromium, said chromate film being overlaid with a resin layer that is deposited in an amount of 0.1 - 3 g/m2 on a dry weight basis and which is formed primarily of water-dispersed silica and one organic resin member as selected from the group consisting of an anionic aqueous resin, an nonionic aqueous resin and an anionic aqueous urethane resin. This steel plate is adapted for not contaminating the environment of the earth in the process of its manufacture.
La tôle d'acier améliorée revêtue d'un composite organique se compose d'une tôle d'acier plaquée de zinc ou d'un alliage de zinc qui forme le substrat. La surface de ce substrat est recouverte d'une pellicule de chromate dont la teneur en Cr6+ ne dépasse pas 70 % du contenu total de Cr et dont la quantité déposée est de 5 - 500 mg/m2 relativement au chrome métallique. Cette pellicule de chromate est revêtue d'une couche de résine dont la quantité déposée est de 0,1 - 3 g/m2, sur une base de poids sec, et qui est composée principalement de silice dispersée dans l'eau et d'une résine organique choisie dans un groupe qui comprend une résine anionique aqueuse, une résine non ionique aqueuse et une résine d'uréthane anionique aqueuse. Le procédé de fabrication de cette tôle ne contamine pas l'environnement.
Hamahara Kyoko
Mochizuki Kazuo
Morito Nobuyuki
Muko Ryoichi
Sujita Shigeko
Kawasaki Steel Corporation
Moffat & Co.
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