[54] METHOD FOR CONCOMITANT
PARTICULATE DIAMOND DEPOSITION IN
ELECTROLESS PLATING, AND THE
PRODUCT THEREOF
[75] Inventors: Theodore Peter Christini, Kennett Square, Pa.; Albert Lawrence Eustice; Arthur Hughes Graham,
both of Wilmington, Del.
[73] Assignee: E. I. Du Pont de Nemours & Company, Wilmington, Del.
[22] Filed: Mar. 15, 1973
[21] Appl. No.: 341,529
Related U.S. Application Data
[63] Continuation-in-part of Ser. No. 208,233, Dec. 15, 1971,abandoned.
[52] U.S. CI 428/426; 428/323; 428/433;
427/438; 51/309; 75/.S R; 106/1; 427/305
[51] Int. CI.2 B32B 15/00; B05D 3/10
[58] Field of Search 117/130 E, 47 A, 160;
51/309, 295; 75/.05; 29/195, 196.6; 106/1
[56] References Cited
UNITED STATES PATENTS
2,858,256 10/1958 Fahnoe et al 51/309
3,061,525 6/1959 Grazen 204/9
3,212,918 10/1965 Tsu et al 117/47 A
3,379,556 4/1968 Chiecchi 117/47 A
This invention is a method for depositing on an article a coating containing at least one member of the group metals and metal alloys plus particulate dispersed diamond comprising contacting the surface of the article with a stable electroless plating bath consisting essentially of an aqueous solution of soluble constituents of the group, electroless reducing agent therefor, a suspension of diamond particles therein and a stabilizer, and maintaining the diamond particles in suspension throughout the bath during the coating of the article for a time sufficient to produce a preselected depth of coating on the article, and the coated article per se.
6 Claims, 16 Drawing Figures
