Patent US4889775A successfully refreshed from Google Patents.
US4889775A
Expired / Lapsed
US
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Highly corrosion-resistant surface-treated steel plate
Assignee: Kansai Paint Co Ltd
•
Filing: 1988-02-25
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Granted: 1989-12-26
•
Expires: 2008-02-25
Abstract
Abstract The present invention relates to a highly corrosion resistant surface-treated steel plate. The steel plate of the invention comprises a zinc deposition or zinc alloy deposition film as the undercoat deposition layer, a chromate film formed on the undercoat deposition layer and a film of a resin composition formed on the chromate film. This resin composition comprises a substrate resin formed by adding at least one basic nitogen atom and at least two primary hydrogen groups to terminal of an epoxy resin, silica and sparingly water soluble Cr compound. The resin composition may comprise a polyisocyanate compound as the curing agent. Moreover, the resin composition may comprise a silane compound as the crosslinking agent for the substrate resin and silica.
Inventors
- 👤 Takeshi Adaniya
- 👤 Masaaki Yamashita
- 👤 Takahiro Kubota
- 👤 Akira Enatsu
- 👤 Norio Nikaido
- 👤 Yoshiaki Miyosawa
- 👤 Tadashi Nishimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:17
CPC Classifications
B; B32; B32B; B32B15/00; B32B15/04; B32B15/08; C; C23; C23C; C23C22/00; C23C22/82; C23C22/83; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/64; C08G18/6415; C08G18/643; C08G59/00; C08G59/18; C08G59/40; C08G59/4007; C08G59/4014; C08G59/4028; C08K; C08K3/00; C08K3/10; C08K3/11; C08K3/34; C08K3/36; C09; C09D; C09D175/00; C09D175/04; C09D175/12; C09D5/00; C09D5/08; C23C2222/00; C23C2222/20; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12556; Y10T428/12569; Y10T428/12611; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799; Y10T428/12861; Y10T428/12951; Y10T428/12972
Claims Analysis
Total Claims: 66
Claim 1
Independent Claim
155 words
A highly corrosion-resistant surface-treated steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, a chromate film formed on the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a base resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, a polyisocyanate compound, the amount of said polyisocyanate compound being in the range of 5 to 80 parts per 100 parts resin, silica and sparingly water soluble Cr compound, the base resin/silica weight ratio being in the range of from 99/1 to 30/70 and the base resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of the base resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica:sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 2
Dependent Claim
155 words
A highly corrosion-resistant surface-treated steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, a chromate film formed on the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a base resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, a polyisocyanate compound, the amount of said polyisocyanate compound being in the range of 5 to 80 parts per 100 parts resin, silica and sparingly water soluble Cr compound, the base resin/silica weight ratio being in the range of from 99/1 to 30/70 and the base resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of the base resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica:sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 3
Dependent Claim
23 words
The plate as claimed in claim 1, wherein the base resin/polyisocyanate compound weight ratio is in the range of from 100/5 to 100/80.
Claim 4
Dependent Claim
23 words
The plate as claimed in claim 1, wherein the base resin/polyisocyanate compound weight ratio is in the range of from 100/10 to 100/50.
Claim 5
Dependent Claim
25 words
The plate as claimed in claim 1, 2 or 3, wherein the base resin/silica weight ratio is in the range of from 90/10 to 50/50.
Claim 6
Dependent Claim
25 words
The plate as claimed in claim 1, 2 or 3, wherein the base resin/silica weight ratio is in the range of from 80/20 to 60/40.
Claim 7
Dependent Claim
16 words
The plate as claimed in claim 1, 2 or 3, wherein the silica is hydrophobic silica.
Claim 8
Dependent Claim
30 words
The plate as claimed in claim 1, 2 or 3, wherein weight ratio of the base resin/Cr compound with less solubility is in the range of from 97/3 to 65/35.
Claim 9
Dependent Claim
30 words
The plate as claimed in claim 1, 2 or 3, wherein weight ratio of the base resin/Cr compound with less solubility is in the range of from 95/5 to 75/25.
Claim 10
Dependent Claim
52 words
The plate as claimed in claim 1, 2 or 3, wherein the amount (dry base) deposited of chromium in the chromate film is 1 to 1000 mg/m 2 as calculated as the metallic chromium, and the amount deposited of the film of the resin composition is 0.1 to 3.5 g/m 2 .
Claim 11
Dependent Claim
53 words
The plate as claimed in claim 1, 2 or 3, wherein the amount (dry base) deposited of chromium in the chromate film is 10 to 200 mg/m 2 , as calculated as the metallic chromium, and the amount deposited of the film of the resin composition is 0.3 to 2.0 g/m 2 .
Claim 12
Dependent Claim
26 words
The plate as claimed in claim 1, 2 or 3, wherein the weight ratio of the base resin/(silica+sparingly water soluble Cr compound) is 70/30 to 55/45.
Claim 13
Dependent Claim
26 words
The plate as claimed in claim 1, 2 or 3, wherein the weight ratio of the base resin/sparingly water soluble Cr compound is 35/5 to 25/15.
Claim 14
Dependent Claim
17 words
The plate as claimed in claim 1, 2 or 3, wherein the base resin is a solvent.
Claim 15
Dependent Claim
21 words
The plate as claimed in claim 1, 2 or 3, wherein the sparingly watre soluble Cr compound is BaCrO 4 .
Claim 16
Dependent Claim
28 words
The plate as claimed in claim 1, 2 or 3, wherein an alkyl-etherified amino resin is incorporated as a crosslinking agent in the film of the resin composition.
Claim 17
Dependent Claim
36 words
The plate as claimed in claim 1, 2 or 3, wherein a resin other than an epoxy resin, selected from acrylic resins, alkyd resins and polyester resin, is incorporated in the film of the resin composition.
Claim 18
Dependent Claim
185 words
A highly corrosion-resistant surface-treated steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, a chromate film formed on the surface of the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a substrate resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, a polyisocyanate compound, silica, a silane compound and a sparingly water soluble Cr compound, the amount of said polyisocyanate compound being in the range of 5 to 80 parts per 100 parts resin, the substrate resin/silica weight ratio being in the range of from 99/1 to 30/70, the amount of the silane compound being 0.1 to 15 parts per 100 parts of the sum of the substrate resin and silica and the substrate resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of the substrate resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica/sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 19
Dependent Claim
185 words
A highly corrosion-resistant surface-treated steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, a chromate film formed on the surface of the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a substrate resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, a polyisocyanate compound, silica, a silane compound and a sparingly water soluble Cr compound, the amount of said polyisocyanate compound being in the range of 5 to 80 parts per 100 parts resin, the substrate resin/silica weight ratio being in the range of from 99/1 to 30/70, the amount of the silane compound being 0.1 to 15 parts per 100 parts of the sum of the substrate resin and silica and the substrate resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of the substrate resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica/sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 20
Dependent Claim
23 words
The plate as claimed in claim 17, wherein the substrate resin/polyisocyanate compound weight ratio is in the range of from 100/5 to 100/80.
Claim 21
Dependent Claim
23 words
The plate as claimed in claim 17, wherein the substrate resin/polyisocyanate compound weight ratio is in the range of from 100/10 to 100/50.
Claim 22
Dependent Claim
25 words
The plate as claimed in claim 17, 18 or 19, wherein the substrate resin/silica weight ratio is in the range of from 90/10 to 50/50.
Claim 23
Dependent Claim
25 words
The plate as claimed in claim 17, 18 or 19, wherein the substrate resin/silica weight ratio is in the range of from 80/20 to 60/40.
Claim 24
Dependent Claim
16 words
The plate as claimed in claim 17, 18 or 19, wherein the silica is hydrophobic silica.
Claim 25
Dependent Claim
29 words
The plate as claimed in claim 17, 18 or 19, wherein the substrate resin/sparingly water soluble Cr compound weight ratio is in the range of from 97/3 to 65/35.
Claim 26
Dependent Claim
29 words
The plate as claimed in claim 17, 18 or 19, wherein the substrate resin/sparingly water soluble Cr compound weight ratio is in the range of from 95/5 to 75/25.
Claim 27
Dependent Claim
52 words
The palte as calimed in claim 17, 18 or 19, wherein the amount (dry) deposited of chromium in the chromate film is 1 to 1000 mg/m 2 , as calculated as the metallic chromium and the amount deposited of the film of the resin composition is 0.1 to 3.5 g/m 2 .
Claim 28
Dependent Claim
53 words
The plate as claimed in claim 17, 18 or 19, wherein the amount (dry base) deposited of chromium in the chromate film is 10 to 200 mg/m 2 , as calculated as the metallic chromium and the amount deposited of the film of the resin composition is 0.3 to 2.0 g/m 2 .
Claim 29
Dependent Claim
26 words
The palte as claimed in claim 17, 18 or 19, wherein the weight ratio of the substrate resin/(silica+sparingly water soluble Cr compound) is 70/30 to 55/45.
Claim 30
Dependent Claim
30 words
The plate as claimed in claim 17, 18 or 19 to 26 or 27, wherein the weight ratio of the substrate resin/sparingly water soluble Cr compound is 35/5 to 25/15.
Claim 31
Dependent Claim
17 words
The plate as claimed in claim 17, 18 or 19, wherein the substrate resin is a solvent.
Claim 32
Dependent Claim
21 words
The plate as claimed in claim 17, 18 or 19, wherein the sparingly water soluble Cr compound is BaCrO 4 .
Claim 33
Dependent Claim
28 words
The plate as claimed in claim 17, 18 or 19, wherein the alkyl-etherified amino resin is incorporated as a crosslinking agent in the film of the resin composition.
Claim 34
Dependent Claim
36 words
The plate as claimed in claim 17, 18 or 19, wherein the resin other than an epoxy resin, selected from acrylic resins, alkyd resins and polyester resins, is incorporated in the film of the resin composition.
Claim 35
Dependent Claim
134 words
A highly corrosion-resistant surface-treatred steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, chromate film formed on the surface of the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a substrate resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, silica and sparingly water soluble Cr compound, the substrate resin/silica weight ratio being in the range of from 99/1 to 30/70 and the substrate resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of substrate resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica/sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 36
Dependent Claim
134 words
A highly corrosion-resistant surface-treatred steel plate comprising a zinc-deposited or zinc alloy-deposited steel plate, chromate film formed on the surface of the steel plate and a film of a resin composition formed on the chromate film, said resin composition comprising a substrate resin obtained by adding at least one basic nitrogen atom and at least two primary hydroxyl groups to terminals of an epoxy resin, silica and sparingly water soluble Cr compound, the substrate resin/silica weight ratio being in the range of from 99/1 to 30/70 and the substrate resin/sparingly water soluble Cr compound weight ratio being in the range of from 99/1 to 60/40, and wherein weight ratio of substrate resin/(silica+sparingly water soluble Cr compound) is 75/25 to 50/50, and the weight ratio of silica/sparingly water soluble Cr compound is 37/3 to 20/20.
Claim 37
Dependent Claim
22 words
The plate as claimed in claim 33, wherein the substrate resin/silica weight ratio is in the range of from 90/10 to 50/50.
Claim 38
Dependent Claim
22 words
The plate as claimed in claim 33, wherein the substrate resin/silica weight ratio is in the range of from 80/20 to 60/40.
Claim 39
Dependent Claim
16 words
The plate as claimed in claim 33, 34 or 35, wherein the silica is hydrophobic silica.
Claim 40
Dependent Claim
29 words
The plate as claimed in claim 33, 34 or 35, wherein the substrate resin/sparingly water soluble Cr compound weight ratio is in the range of from 97/3 to 65/35.
Claim 41
Dependent Claim
29 words
The plate as claimed in claim 33, 34 or 35, wherein the substrate resin/sparingly wate soluble Cr compound weight ratio is in the range of from 95/5 to 75/25.
Claim 42
Dependent Claim
53 words
The plate as claimed in claim 33, 34 or 35, wherein the amount (dry base) deposited of chromium in the chromate film is 1 to 1000 mg/m 2 , as calculated as the metallic chromium and the amount deposited of the film of the resin compositioin is 0.1 to 3.5 g/m 2 .
Claim 43
Dependent Claim
53 words
The plate as claimed in claim 33, 34 or 35, wherein the amount (dry base) deposited of chromium in the chromate film is 10 to 200 mg/m 2 , as calculated as the metallic chromium and the amount deposited of the film of the resin composition is 0.3 to 2.0 g/m 2 .
Claim 44
Dependent Claim
26 words
The plate as claimed in claim 33, 34 or 35, wherein the weight ratio of the substrate resin/(silica+sparingly water soluble Cr compound) is 70/30 to 55/45.
Claim 45
Dependent Claim
26 words
The plate as claimed in claim 33, 34 or 35, wherein the weight ratio of the substrate resin/sparingly water soluble Cr compound is 35/5 to 25/15.
Claim 46
Dependent Claim
17 words
The plate as claimed in claim 33, 34 or 35, wherein the substrate resin is a solvent.
Claim 47
Dependent Claim
21 words
The plate as claimed in claim 33, 34 or 35, wherein the sparingly water soluble Cr compound is BaCrO 4 .
Claim 48
Dependent Claim
28 words
The palte as claimed in claim 33, 34 or 35, wherein the alkil-etherified amino resin is incorporated as a crosslinking agent in the film of the resin composition.
Claim 49
Dependent Claim
35 words
The plate as claimed in claim 33, 34 or 35, wherein a resin other than an epoxy resin, selected acrylic resins, alkyd resin and polyester resins, is incorporated in the film of the resin composition.
Claim 50
Dependent Claim
64 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc-deposited or zinc alloy-deposited film, the chromate film and the film of the resin composition are arranged on one surface of the steel plate substrate in this order from the surface side of the steel plate substrate, and the other surface of the steel plate substrate is not deposited with a metal.
Claim 51
Dependent Claim
63 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc-deposited or zinc alloy-deposited film, the chromate film and the film of the resin composition are arranged on one surface of the steel plate substrate in this order from the surface side of the steel plate substrate and the other surface of the steel plate substrate is deposited with a metal.
Claim 52
Dependent Claim
51 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc-deposited or zinc alloy-deposited film, the chromate film and the film of the resin composition are arranged on each of the surfaces of the steel plate substrate in this order from the surface side of the steel plate substrate.
Claim 53
Dependent Claim
22 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc alloy-deposited steel plate is a zinc/nickel alloy-deposited steel plate.
Claim 54
Dependent Claim
36 words
The plate as claimed in claim 50, wherein at least one element selected from the group consisting of Ni, Fe, Mo, Co, Al, and Cr is incorporated in the basic component of the deposited zinc alloy.
Claim 55
Dependent Claim
22 words
The plate as claimed in claim 50, wherein the nickel content in the zinc/nickel alloy-deposited film is 5 to 20% by weight.
Claim 56
Dependent Claim
20 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc-deposited steel plate is a zinc/alloy-deposited steel plate.
Claim 57
Dependent Claim
36 words
The plate as claimed in claim 51, wherein at least one element selected from the group consisting of Ni, Fe, Mo, Co, Al, and Cr is incorporated in the basic component of the deposited zinc alloy.
Claim 58
Dependent Claim
22 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc alloy-deposited steel plate is a zinc/manganese alloy-deposited steel plate.
Claim 59
Dependent Claim
22 words
The plate as claimed in claim 52, wherein the manganese content in the zinc/manganese alloy-deposited film is 30 to 85% by weight.
Claim 60
Dependent Claim
36 words
The plate as claimed in claim 52, wherein at least one element selected from the group consisting of Ni, Fe, Mo, Co, Al, and Cr is incorporated in the basic component of the deposited zinc alloy.
Claim 61
Dependent Claim
22 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc alloy-deposited steel plate is zinc/aluminum alloy deposited steel plate.
Claim 62
Dependent Claim
35 words
The plate as claimed in claim 53, wherein at least one element selected from the group consisting of Ni, Fe, Mo, Co and Cr is incorporated in the basic component of the deposited zinc alloy.
Claim 63
Dependent Claim
22 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc alloy-deposited steel plate is a zinc/cobalt/chromium alloy-deposited steel plate.
Claim 64
Dependent Claim
34 words
The plate as claimed in claim 54, wherein at least one element selected from the group consisting of Ni, Fe, Mo and Al is incorporated in the basic component of the deposited zinc alloy.
Claim 65
Dependent Claim
24 words
The plate as claimed in claim 1, 17 or 33, wherein the zinc-deposited or zinc alloy-deposited film comprises at least two metal deposition layers.
Claim 66
Dependent Claim
24 words
The plate as claimed in claim 55, wherein the zinc alloy-deposited film comprises at least two zinc/iron alloy-deposited layers differing in the iron content.
References Cited (Backward Citations)
US4407899A
Cited
US4411964A
Cited
US4450209A
Cited
JPS5996291A
Cited
US4659394A
Cited
US4548868A
Cited
JPS6123766A
Cited
US4775600A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-12-25 | 1993-06-26 | 1993-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-12-25 | 1997-06-26 | 1997-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-12-25 | 2001-06-26 | 2001-12-26 | $7700.00 | Window Closed / Lapsed |