US5397638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Resin-coated steel sheet having good electrocoatability and weldability
Assignee: Kobe Steel Ltd
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Filing: 1993-04-16
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Granted: 1995-03-14
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Expires: 2013-04-16
Abstract
Abstract A resin-coated steel sheet having good electrocoatability and weldability, characterized in that the resin coating is formed on the layer of zinc plating or zinc alloy plating (with or without subsequent chromate treatment) and is composed mainly of urethane resin containing (a) either colloidal silica or a silane coupling agent and (b) a phosphate of Al, Ba, Ca, Co, Fe, Mg, Mn or Zn in an amount of 0.01-35 wt % (with or without an additional organic pigment fine powder in an amount of 0.01-40 wt %).
Inventors
- 👤 Kenji Miki
- 👤 Hirohiko Sakai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:05
CPC Classifications
C; C09; C09D; C09D175/00; C09D175/04; B; B05; B05D; B05D7/00; B05D7/14; B05D2350/00; B05D2350/60; B05D2350/65; B05D2701/00; B05D2701/40; C23; C23C; C23C2222/00; C23C2222/20; Y; Y10; Y10T; Y10T428/00; Y10T428/25; Y10T428/256; Y10T428/258; Y10T428/259; Y10T428/27; Y10T428/273; Y10T428/31504; Y10T428/31551; Y10T428/31605; Y10T428/31609
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
126 words
A resin-coated steel sheet wherein the steel sheet is coated with 0.1-1.0 g/m 2 of a resin film consisting essentially of: (i) a urethane resin, (ii) 0.01-35 wt % of a metal phosphate of Al, Ba, Ca, Co, Fe, Mg, Mn, or Zn based on the weight of said urethane resin, wherein said metal phosphate has an average particle diameter of ≦3 μm, either (iiia) 5-80 wt % colloidal silica, based on the weight of said urethane resin, or (iiib) 1-40 wt % of a silane coupling agent, based on the weight of said urethane resin and, optionally, (iv) 0.01-40 wt % of an organic pigment based on the weight of said urethane resin, wherein said organic pigment has an average particle diameter of ≦1.0 μm.
Claim 2
Dependent Claim
126 words
A resin-coated steel sheet wherein the steel sheet is coated with 0.1-1.0 g/m 2 of a resin film consisting essentially of: (i) a urethane resin, (ii) 0.01-35 wt % of a metal phosphate of Al, Ba, Ca, Co, Fe, Mg, Mn, or Zn based on the weight of said urethane resin, wherein said metal phosphate has an average particle diameter of ≦3 μm, either (iiia) 5-80 wt % colloidal silica, based on the weight of said urethane resin, or (iiib) 1-40 wt % of a silane coupling agent, based on the weight of said urethane resin and, optionally, (iv) 0.01-40 wt % of an organic pigment based on the weight of said urethane resin, wherein said organic pigment has an average particle diameter of ≦1.0 μm.
Claim 3
Dependent Claim
21 words
The resin-coated steel sheet according to claim 1, wherein the resin-coating is formed on a layer of zinc-plating or zinc-alloy plating.
Claim 4
Dependent Claim
27 words
A resin-coated steel sheet according to claim 2, wherein said layer of zinc plating or zinc-alloy plating is coated with 10-150 mg/m 2 of a chromate film.
Claim 5
Dependent Claim
20 words
The resin-coated steel sheet according to claim 3, wherein said chromate film is present in from 30-80 mg/m 2 .
Claim 6
Dependent Claim
29 words
The resin-coated steel sheet according to claim 1, wherein said resin fiber contains said silane coupling agent, which agent is selected from the group consisting of γ-mercaptopropyltrimethoxysilane and γ-aminopropyltrimethoxysilane.
Claim 7
Dependent Claim
20 words
The resin-coated steel sheet according to claim 1, wherein said urethane resin is an aqueous urethane resin containing hydrophilic groups.
Claim 8
Dependent Claim
16 words
The resin-coated steel sheet according to claim 1, wherein said resin film contains said colloidal silica.
Claim 9
Dependent Claim
123 words
A resin-coated steel sheet wherein the steel sheet is coated with 0.1-1.0 g/m 2 of resin consisting of: (i) a urethane resin, (ii) 0.01-35 wt % of a metal phosphate of Al, Ba, Ca, Co, Fe, Mg, Mn, or Zn based on the weight of said urethane resin, wherein said metal phosphate has an average particle diameter of ≦3 μm, either (iiia) 5-80 wt % colloidal silica, based on the weight of said urethane resin, or (iiib) 1-40 wt % of a silane coupling agent, based in the weight of said urethane resin, and, optionally, (iv) 0.01-40 wt % of an organic pigment, based on the weight of said urethane resin, wherein said organic pigment has an average particle diameter of ≦1.0 μm.
Claim 10
Dependent Claim
123 words
A resin-coated steel sheet wherein the steel sheet is coated with 0.1-1.0 g/m 2 of resin consisting of: (i) a urethane resin, (ii) 0.01-35 wt % of a metal phosphate of Al, Ba, Ca, Co, Fe, Mg, Mn, or Zn based on the weight of said urethane resin, wherein said metal phosphate has an average particle diameter of ≦3 μm, either (iiia) 5-80 wt % colloidal silica, based on the weight of said urethane resin, or (iiib) 1-40 wt % of a silane coupling agent, based in the weight of said urethane resin, and, optionally, (iv) 0.01-40 wt % of an organic pigment, based on the weight of said urethane resin, wherein said organic pigment has an average particle diameter of ≦1.0 μm.
Claim 11
Dependent Claim
41 words
The resin-coated steel sheet according to claim 8, wherein said resin coating is formed on a layer of zinc-plating or zinc-alloy plating, said layer of zinc plating or zinc-alloy plating being first coated with 10-150 mg/m 2 of a chromate film.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-03-13 | 1998-09-12 | 1999-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-03-13 | 2002-09-12 | 2003-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-03-13 | 2006-09-12 | 2007-03-14 | $7700.00 | Window Closed / Lapsed |