EP0264354A2
Expired / Lapsed
EP
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Process for production of calcium phosphate compoundcoated composite material
Assignee: De Nora Permelec Ltd
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Filing: 1987-10-16
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Granted: —
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Expires: 2007-10-16
Abstract
Abstract A process for production of a calcium phosphate compound-coated composite material is disclosed, comprising oxidizing a metallic substrate to form a layer of the oxide of the metal component of the metallic substrate on the surface thereof, and forming a coating layer of a calcium phosphate compound on the surface of the oxide layer.
Inventors
- 👤 Takayuki Shimamune
- 👤 Masashi Hosonuma
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 23:40
CPC Classifications
C; C25; C25D; C25D11/00; C25D11/02; C25D11/34; A; A61; A61F; A61F2/00; A61F2/02; A61F2/28; A61L; A61L27/00; A61L27/28; A61L27/30; A61L27/32; C23; C23C; C23C28/00; C23C28/04; C23C28/044; C23C4/00; C23C4/02; C23C4/04; C23C4/10; C25D11/26; A61F2310/00; A61F2310/00389; A61F2310/00592; A61F2310/00796; Y; Y10; Y10S; Y10S205/00; Y10S205/917
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
53 words
A process for producing a calcium phosphate compound-coated composite material which comprises oxidizing a metallic substrate to form a layer of an oxide of the metal component of the substrate on the surface of the substrate, and forming a coating layer of a calcium phosphate compound on the surface of the oxide layer.
Claim 2
Dependent Claim
53 words
A process for producing a calcium phosphate compound-coated composite material which comprises oxidizing a metallic substrate to form a layer of an oxide of the metal component of the substrate on the surface of the substrate, and forming a coating layer of a calcium phosphate compound on the surface of the oxide layer.
Claim 3
Dependent Claim
35 words
The process as claimed in claim 1, wherein the metallic substrate is made of a corrosion resistant metal or alloy selected from the group consisting of titanium, titanium alloys, stainless steel and cobalt-chromium base alloys.
Claim 4
Dependent Claim
24 words
The process as claimed in claim 1, wherein the layer of the oxide of the metal component is formed by heat-oxidizing the metallic substrate.
Claim 5
Dependent Claim
35 words
The process as claimed in claim 3, wherein the surface of the metallic substrate is previously subjected to acid treatment to convert the metallic substrate surface into metal hydride and then the surface is heat-oxidized.
Claim 6
Dependent Claim
39 words
The process as claimed in claim 3, wherein the surface of the metallic substrate is previously converted into metal hydride by passing electricity in an electrolyte with the metallic substrate as a cathode, and then the surface is heat-oxidized.
Claim 7
Dependent Claim
58 words
The process as claimed in claim 1, wherein the metallic substrate is electrolytically oxidized in an electrically conductive electrolyte with the metallic substrate as an anode to form a layer of the oxide of the metallic substrate component alone or a layer of a mixed oxide of the metallic substrate component and a metal component of the electrolyte.
Claim 8
Dependent Claim
56 words
The process as claimed in claim 6, wherein the metallic substrate is titanium or a titanium alloy and is electrolyzed in an electrolyte containing sulfuric acid, a sulfate and/or a carbonate at a current density of not less than 1 A/dm² to form the oxide or mixed oxide layer on the surface of the metallic substrate.
Claim 9
Dependent Claim
51 words
The process as claimed in claim 6, wherein the metallic substrate is titanium and is electrolyzed in an electrolyte containing cobalt and/or chromium ion at a current density of not less than 1 A/dm² to form a mixed oxide layer containing cobalt and/or chromium on the surface of the metallic substrate.
Claim 10
Dependent Claim
59 words
The process as claimed in claim 6, wherein the metallic substrate is stainless steel or a chromium-cobalt base alloy and is electrolyzed in a neutral or weak alkaline aqueous solution or an organic solution as an electrolyte as a current density of not less than 1 A/dm² to form an oxide layer on the surface of the metallic substrate.
Claim 11
Dependent Claim
49 words
The process as claimed in claim 6, wherein the metallic substrate is stainless steel or a chromium-cobalt base alloy and is electrolyzed in an electrolyte containing cobalt and/or chromium at a current density of not less than 1 A/dm² to form a mixed oxide layer containing cobalt and/or chromium.
Claim 12
Dependent Claim
36 words
The process as claimed in claim 6, wherein the metallic substrate with the oxide layer formed thereon is heated in air at 200 to 700°C, and then a coating of a calcium phosphate compound is formed.
References Cited (Backward Citations)
No citation records indexed.
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