Method of forming rigid film of calcium phosphate compound

Details Method of forming rigid film of calcium phosphate compound Method of forming rigid film of calcium phosphate compound

1987-11-20

1988-09-13

Lusignan, Michael R.

Stock material or miscellaneous articles

Composite

Of metal

427380, 4274192, 4274196, 428697, 428699, 428702, B05D 136, B05D 302, B05D 700, B32B 900

Patent

active

047709430

ABSTRACT:
A method of forming a rigid film of calcium phosphate compound having good bio-conformance on a surface of a ceramic or metal substrate is disclosed. According to this method, a slurry of a fine powder of phosphate-series glass of CaO-Na.sub.2 O-P.sub.2 O.sub.5 -Al.sub.2 O.sub.3 is applied to the surface of the substrate and is dried and heat-treated to form a binder layer which covers the surface of the substrate. A peptisation agent such as ammonium polyacrylate and water are mixed with a fine powder of a calcium phosphate compound having a particle size of 1 .mu.m or less to prepare a slurry, and this slurry is applied to the surface of the binder layer. The slurry on the binder layer is dried and heat-treated to form a film of the calcium phosphate compound. The film of the calcium phosphate compound formed by this method is uniform and has high adhesion strength with the substrate.

REFERENCES:
patent: 4108690 (1978-08-01), Heller
patent: 4539051 (1985-09-01), Halias
patent: 4582725 (1986-04-01), Nakashima

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