Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Particulate matter
Patent
1997-03-28
2000-03-07
Lovering, Richard D.
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Particulate matter
106490, 2523635, 42721336, 427221, 428407, 528 32, 528 40, 528 43, B32B 1800
Patent
active
060337818
ABSTRACT:
A coated ceramic powder comprises a plurality of ceramic particles and a siloxane star-graft coating polymer encapsulating at least a portion of the particles. The coating polymer comprises Si(w,x,y,z), where w, x, y and z are the mole percent tetrafunctional, trifunctional, difunctional and monofunctional monomeric units, respectively, and wherein w is about 20-100 and x, y and z are about 0-30, 0-50 and 0-10, respectively, and at least one of x, y and z is greater than zero. A method of preparing a coated ceramic powder comprises the steps of (a) polymerizing a tetrafunctional siloxane monomer and at least one of a trifunctional siloxane monomer, a difunctional siloxane monomer and a monofunctional siloxane monomer, (b) adding a quantity of ceramic powder to a reaction vessel, (c) shear mixing the ceramic powder for a time sufficient to wet substantially all of the powder surface, (d) adding the siloxane polymer prepared in step (a) to the reaction vessel containing the shear mixed ceramic powder, (e) shear mixing the shear mixed ceramic powder and the siloxane polymer for a time sufficient to form a siloxane polymer coated ceramic powder, and (f) separating the coated ceramic powder from the components remaining in the reaction vessel.
REFERENCES:
patent: 2885366 (1959-05-01), Iler
patent: 2938009 (1960-05-01), Lucas
patent: 3437502 (1969-04-01), Werner
patent: 3635743 (1972-01-01), Smith
patent: 3671484 (1972-06-01), Cooper et al.
patent: 3816152 (1974-06-01), Yates
patent: 3849152 (1974-11-01), Mimeault
patent: 3905936 (1975-09-01), Hawthorne
patent: 4151154 (1979-04-01), Berger
patent: 4243692 (1981-01-01), Scholze et al.
patent: 4271234 (1981-06-01), Schonafinger et al.
patent: 4574082 (1986-03-01), Tietjen et al.
patent: 4644077 (1987-02-01), Gupta
patent: 4818614 (1989-04-01), Fukui et al.
patent: 4877604 (1989-10-01), Schlossman
patent: 4882225 (1989-11-01), Fukui et al.
patent: 4927464 (1990-05-01), Cowie
patent: 5035803 (1991-07-01), Cohen
patent: 5063254 (1991-11-01), Nakos
patent: 5068056 (1991-11-01), Robb
patent: 5070175 (1991-12-01), Tsumura et al.
patent: 5143722 (1992-09-01), Hollenberg et al.
patent: 5274064 (1993-12-01), Sarkar
patent: 5310578 (1994-05-01), Thurn-Muller et al.
patent: 5328683 (1994-07-01), Harashima et al.
patent: 5348760 (1994-09-01), Parker et al.
patent: 5411761 (1995-05-01), Inokuchi et al.
patent: 5440001 (1995-08-01), Griswold et al.
patent: 5674624 (1997-10-01), Miyazaki et al.
Sol-Gel Science, Academic Press, Chapter 3 and 4, Brinker et al., 1990.
Aikens John H.
Brotzman, Jr. Richard W.
Lovering Richard D.
Nanophase Technologies Corporation
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