IP Library Granted Patent US 8,623,502
Granted Patent B2
US 8,623,502 · App. 13/636,532 · Granted Jan 7, 2014

Clear-coated stainless steel sheet with excellent pressure mark resistance and scratch resistance

Inventors: Hiroyuki Matsuyama (Osaka, JP); Haruki Ariyoshi (Tokyo, JP); Youichirou Yasuda (Amagasaki, JP)
Assignee: Nippon Steel & Sumikin Stainless Steel Corporation
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Quick Facts
Patent No.
US 8,623,502
App. No.
13/636,532
Granted
Jan 7, 2014
Kind
B2
Abstract

This clear-coated stainless steel sheet includes: a stainless steel sheet; and a clear-coated film coated on either one or both of two main surfaces of the stainless steel sheet, wherein the clear-coated film contains a thermosetting resin composition (A) and resin beads (B) at a content in a range of 0.5 parts by mass to 4.0 parts by mass relative to 100 parts by mass of a solid content of the thermosetting resin composition (A), the thermosetting resin composition (A) includes an acrylic resin (A1) and a cross-linked curing resin (A2) composed of a blocked isocyanate resin and an amino resin which cross-link and cure the acrylic resin (A1), the acrylic resin (A1) includes one or more cross-linking functional groups selected from a hydroxyl group, a carboxylic group, and an alkoxy silane group, and the acrylic resin (A1) has a glass transition temperature of 30° C. to 90° C., and has a number average molecular weight of 3000 to 50000.

Claims (9)

1. A clear-coated stainless steel sheet with excellent anti-pressure printing property and excellent scratch resistance, comprising:

a stainless steel sheet; and

a clear-coated film coated on either one or both of two main surfaces of the stainless steel sheet,

wherein the clear-coated film contains a thermosetting resin composition (A) and resin beads (B) at a content in a range of 0.5 parts by mass to 4.0 parts by mass relative to 100 parts by mass of a solid content of the thermosetting resin composition (A),

the thermosetting resin composition (A) includes an acrylic resin (A1) and a cross-linked curing resin (A2) composed of a blocked isocyanate resin and an amino resin which cross-link and cure the acrylic resin (A1), and

the acrylic resin (A1) includes one or more cross-linking functional groups selected from the group consisting of a hydroxyl group, a carboxylic group, and an alkoxy silane group, the acrylic resin (A1) has a glass transition temperature of 30° C. to 90° C., and has a number average molecular weight of 3000 to 50000 and

wherein a film thickness of the clear-coated film is in a range of 3 to 5 μm, and an average particle diameter of the resin beads (B) is in a range of 0.8 times to 1.0 times the film thickness such that an average particle diameter of the resin beads (B) is in a range of 2.4 to 5 μm.

2. The clear-coated stainless steel sheet with excellent anti-pressure printing property and excellent scratch resistance according to claim 1 ,

wherein the resin beads (B) are one or more beads selected from the group consisting of cross-linked acrylic resin beads, cross-linked polyurethane resin beads, and fluororesin beads.

Assignments (2)
CHANGE OF NAME Recorded Jul 8, 2021
From: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
To: NIPPON STEEL STAINLESS STEEL CORPORATION
Reel/Frame 056805/0030 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 21, 2012
From: MATSUYAMA, HIROYUKI; ARIYOSHI, HARUKI; YASUDA, YOUICHIROU
To: NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION
Reel/Frame 029005/0279 →
Priority Claims (2)
JP 2010-077367 · Mar 30, 2010 · national
JP 2011-029016 · Feb 14, 2011 · national
Continuity (1)
Related Publication 20130011615A1 · Jan 10, 2013