US4701354A
Expired / Lapsed
US
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Process for surface treatment of metal materials
Assignee: Toyo Seikan Group Holdings Ltd
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Filing: 1985-11-20
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Granted: 1987-10-20
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Expires: 2005-11-20
Abstract
Abstract A very thin coating layer having a thickness of the order of 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.
Inventors
- 👤 Yoichi Kitamura
- 👤 Hisashi Hotta
- 👤 Toshimasa Kodaira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:40
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/02; B; B29; B29C; 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; B29C65/00; B29C65/48; B29C65/4805; B29C65/481; B29C65/4815; B29C66/71; B29C66/7234; B29C66/72343; B29L; B29L2009/00; C09J2400/00; C09J2400/10; C09J2400/16; C09J2400/166
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
30 words
A process for surface treatment of metal materials, which comprises applying a hydroxymethyl substituted phenol in gaseous phase to the surface of a metal material maintained at a high temperature.
Claim 2
Dependent Claim
30 words
A process for surface treatment of metal materials, which comprises applying a hydroxymethyl substituted phenol in gaseous phase to the surface of a metal material maintained at a high temperature.
Claim 3
Dependent Claim
22 words
A process according to claim 1, wherein the surface of the metal material is maintained at a temperature higher than 150° C.
Claim 4
Dependent Claim
19 words
A process according to claim 1, wherein the hydroxymethyl substituted phenol has a molecular weight of 124 to 320.
Claim 5
Dependent Claim
89 words
A process 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, and it is preferred that the hydroxymethyl group be bonded at the ortho- or para-position to the phenolic hydroxyl group.
Claim 6
Dependent Claim
81 words
A process 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 rings A and B may be substituted with a methyl group.
Claim 7
Dependent Claim
32 words
A process according to claim 1, wherein the treatment with the hydroxymethyl substituted phenol is carried out so that the thickness of the formed treatment coating layer is 1 to 100 Å.
Claim 8
Dependent Claim
32 words
A process according to claim 1, wherein the metal material is introduced in a heat treatment furnace and is exposed to a high-temperature atmosphere containing a vapor of the hydroxymethyl substituted phenol.
Claim 9
Dependent Claim
42 words
The process of claim 1 wherein the metal material is a tin-free steel having a chromium-containing coating layer composed of metallic chromium, non-metallic chromium or a mixture thereof on at least the surface thereof to which the hydroxymethyl substituted phenol is applied.
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) | 1990-10-19 | 1991-04-20 | 1991-10-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-19 | 1995-04-20 | 1995-10-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-19 | 1999-04-20 | 1999-10-20 | $7700.00 | Window Closed / Lapsed |