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Patent Searching and Data


Title:
COATING COMPOSITION FOR MAGNESIUM-CONTAINING GALVANIZED STEEL SHEET AND STEEL SHEET COATED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2019/132252
Kind Code:
A1
Abstract:
The present invention relates to a coating composition for preventing occurrence of black staining and black spots when an Mg-containing galvanized steel sheet is exposed to a high temperature and high humidity environment, and an Mg-containing galvanized steel sheet coated with the same. The present invention provides a steel sheet coating composition comprising 10-20% by weight of a carboxylated vinylidene copolymer, 1-5% by weight of a water dispersible crosslinking agent relative to the weight of carboxylated vinylidene copolymer, and the balance being water; and a coated steel sheet having a coating film layer formed with the same composition, the coating layer containing magnesium. The coated steel sheet having the coating film formed with the coating composition according to the present invention prevents the occurrence of black staining and/or black spots. In particular, the coated steel sheet exhibits excellent physical property of preventing the occurrence of black staining and/or black spots even when exposed to a high temperature and high humidity environment.

Inventors:
PARK, Young-Jun (20-26 Pokposarang-gil,Gwangyang-si, Jeollanam-do, 57807, KR)
Application Number:
KR2018/014202
Publication Date:
July 04, 2019
Filing Date:
November 19, 2018
Export Citation:
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Assignee:
POSCO (6261, Donghaean-ro Nam-gu,Pohang-si, Gyeongsangbuk-do, 37859, KR)
International Classes:
C09D127/16; C08F2/22; C08F8/46; C08K5/00; C08L27/08; C08L27/22; C23C2/06; C23C2/26; C25D3/56; C25D5/48
Foreign References:
JP2000302821A2000-10-31
JP3298363B22002-07-02
KR101560947B12015-10-15
JP2010275344A2010-12-09
JP6147314B22017-06-14
Attorney, Agent or Firm:
C&S PATENT AND LAW OFFICE (7th Floor, Daelim Acrotel13, Eonju-ro 30-gil,Gangnam-gu, Seoul, 06292, KR)
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