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US4916031A
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US
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Surface-treated steel plate and bonded structure of metal material
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1988-11-08
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Granted: 1990-04-10
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Expires: 2008-11-08
Abstract
Abstract A very thin coating layer having a thickness of the order of 1-100 angstroms of a hydroxymethyl substituted phenol is applied to the surface of a metal material. The hydroxylmethyl substituted phenol, such as saligenin, is applied in the gaseous phase to the surface of the metal material maintained at a high temperature. By forming this ultra-thin coating layer, the heat bondability of a thermoplastic resin layer to the metal material can be effectively improved. This technique is advantageously used in various fields, for example, for production of bonded cans. The metal material comprises a steel plate substrate and a chromium-containing layer on the surface of the substrate, and the very thin layer is applied on the chromium-containing layer.
Inventors
- 👤 Yoichi Kitamura
- 👤 Hisashi Hotta
- 👤 Toshimasa Kodaira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 07:07
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/02; B; B29; B29C; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/432; B29C66/4322; B29C66/70; B29C66/72; B29C66/723; B29C66/7232; B29C66/72321; C23; C23C; C23C14/00; C23C14/06; C23C14/12; B29C66/71; B29L; B29L2009/00; C09J2400/00; C09J2400/10; C09J2400/16; C09J2400/166; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854; Y10T428/28; Y10T428/2804; Y10T428/31504; Y10T428/31725; Y10T428/31761
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
104 words
A surface-treated steel plate excellent in adhesion as measured by T-peel strength, which comprises a steel plate substrate, a chromium-containing coating layer formed on the surface of the steel plate substrate, which is composed of metallic chromium, chromium oxide or a mixture thereof, and an ultra-thin layer bonded to the surface of the chromium-containing coating layer, which is composed of hydroxymethyl substituted phenol or a polycondensate thereof, wherein the ultra-thin layer of the hydroxymethyl substituted phenol or its polycondensate has a thickness of 1 to 100 Å and the chromium-containing coating layer has a coated amount of 6 to 360 mg/m 2 as chromium.
Claim 2
Dependent Claim
104 words
A surface-treated steel plate excellent in adhesion as measured by T-peel strength, which comprises a steel plate substrate, a chromium-containing coating layer formed on the surface of the steel plate substrate, which is composed of metallic chromium, chromium oxide or a mixture thereof, and an ultra-thin layer bonded to the surface of the chromium-containing coating layer, which is composed of hydroxymethyl substituted phenol or a polycondensate thereof, wherein the ultra-thin layer of the hydroxymethyl substituted phenol or its polycondensate has a thickness of 1 to 100 Å and the chromium-containing coating layer has a coated amount of 6 to 360 mg/m 2 as chromium.
Claim 3
Dependent Claim
65 words
A surface-treated steel plate as set forth in claim 1, wherein the chromium-containing coating layer comprises a metallic chromium layer having a coated chromium amount of up to 300 mg/m 2 , which is formed on the steel plate substrate, and a chromium oxide layer having a coated amount of 1 to 60 mg/m 2 as chromium, which is formed on the metallic chromium layer.
Claim 4
Dependent Claim
45 words
A surface-treated steel plate according to claim 2, wherein the metallic chromium layer has a coated chromium amount of from 10 to 200 mg/m 2 , and the chromium oxide layer has a coated amount of from 5 to 40 mg/m 2 , as chromium.
Claim 5
Dependent Claim
21 words
A surface-treated steel plate according to claim 1, wherein the hydroxymethyl substituted phenol has a molecular weight of 124 to 320.
Claim 6
Dependent Claim
71 words
A surface-treated steel plate according to claim 1, wherein the hydroxymethyl substituted phenol is represented by the following general formula: ##STR6## wherein R stands for a hydrogen atom, an alkyl group, a hydroxyl group or a phenyl group, n is an integer of from 1 to 3, and m is an integer of from 1 to 3, with the proviso that the sum of m and n does not exceed 5.
Claim 7
Dependent Claim
24 words
A surface-treated steel plate according to claim 5, wherein the hydroxymethyl group is bonded at the ortho- or para-position to the phenolic hydroxy group.
Claim 8
Dependent Claim
80 words
A surface-treated steel plate according to claim 1, wherein the hydroxymethyl substituted phenol is a hydroxymethyl substituted binuclear phenol represented by the following general formula: ##STR7## wherein R 2 stands for a direct bond or a divalent bridging group, each of n' and m' is an integer of up to 2 inclusive of 0, with the proviso that the sum of n' and m' is an integer of at least 1, and p and q, are, independently 0 or 1.
Claim 9
Dependent Claim
46 words
A surface-treated steel plate according to claim 7, wherein the bridging group R 2 is selected from the group consisting of a methylene group, a methylene-oxymethylene group, an ethylidene group, a 2,2-propylidene group, an oxygen atom, a sulfur atom, a sulfonyl group and an imino group.
Claim 10
Dependent Claim
28 words
A surface-treated steel plate according to claim 1, wherein the ultra-thin layer of the hydroxymethyl substituted phenol or its polycondensate has a thickness of 1 to 30 Å.
Claim 11
Dependent Claim
109 words
A bonded structure comprising (A) at least two portions of a surface-treated steel plate which comprises (i) a steel plate substrate, (ii) a chromium-containing coating layer formed on the surface of the steel plate substrate, which is composed of metallic chromium, chromium oxide or a mixture thereof and has a coated amount of 6 to 360 mg/m 2 as chromium, and (iii) an ultra-thin layer bonded to the surface of the chromium-containing coating layer, which is composed of a hydroxymethyl substituted phenol or a polycondensate thereof and has a thickness of 1 to 100 Å, and (B) a polyamide adhesive interposed between the two ultra-thin layers of said portions.
Claim 12
Dependent Claim
109 words
A bonded structure comprising (A) at least two portions of a surface-treated steel plate which comprises (i) a steel plate substrate, (ii) a chromium-containing coating layer formed on the surface of the steel plate substrate, which is composed of metallic chromium, chromium oxide or a mixture thereof and has a coated amount of 6 to 360 mg/m 2 as chromium, and (iii) an ultra-thin layer bonded to the surface of the chromium-containing coating layer, which is composed of a hydroxymethyl substituted phenol or a polycondensate thereof and has a thickness of 1 to 100 Å, and (B) a polyamide adhesive interposed between the two ultra-thin layers of said portions.
Claim 13
Dependent Claim
18 words
A bonded can having a side seam, which comprises a bonded structure as set forth in claim 10.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-09 | 1993-10-09 | 1994-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-09 | 1997-10-09 | 1998-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-09 | 2001-10-09 | 2002-04-10 | $7700.00 | Window Closed / Lapsed |