Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Patent
1993-09-08
1996-03-12
Simmons, David A.
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
264 6, 264 7, 264 12, 264 61, 264 63, C04B 35622, B29B 900
Patent
active
054983827
ABSTRACT:
A water sensitive ceramic powder, in particular aluminum nitride, is provided with a hydrophobic coating. The coated powder is dispersed in water with addition of a binder and a nonionic surfactant from the group comprising ethylene oxide adducts with an HLB value of from 10 to 14. Subsequently the aqueous slip is converted into a free flowing granulated powder. The nonionic surfactant, which is added in an amount sufficient to give a monomolecular layer, makes possible a good dispersion of the hydrophobically coated powder in water.
REFERENCES:
patent: 4401366 (1983-08-01), Hope
patent: 4978465 (1990-12-01), Sturwold
patent: 5175051 (1992-12-01), Schloegl et al.
patent: 5182239 (1993-01-01), Hirokawa et al.
patent: 5288806 (1994-02-01), Peacock
Chemical Abstracts, vol. 11, No. 6, Aug. 7, 1989, abstract No. 44266f, Nakamura "Free Flowing granulated aluminum nitride powder for press molding" & JP-A-1061632, Mar. 8, 1989.
Database WPI, Section CH, Week 8928, Derwent Publications Ltd. Class A81, AN 89-203080 & JP-A-1 141 865 (Mitsubishi Mining Cement) Jun. 2, 1989.
Database WPI, Section CH, Week 8916, Derwent Publications Ltd., Class E33, AN 89-117143, & JP-A-1061304 (Denki Kagaku Kogyo KK) Mar. 8, 1989.
Chemical Abstracts, vol. 108, No. 8, Feb. 22, 1988, Columbus, Ohio, Abstract No. 61239e, Uno Naoki & Al. "Surface treatment of aluminum nitride powder . . . ", JP-A-62207770, Sep. 12, 1987.
Patent Abstracts of Japan, vol. 013, No. 021 (C-560), Jan. 18, 1989 & JP-A-63 225 507 Sep. 1988.
Database Inspec, Institute of Electrical Engineers, No. 4014683, Egashira et al. "Chemical surface treatments of aluminum nitride powder suppressing its reactivity with water . . . ".
Von R. Heusch, Eine experimentelle Methode zur Bestimmung des HLB-Wertes von Tensiden; Jul. 7, 1969 pp. 31-38.
Guther Hans-Michael
Hessel Friedrich
Kostler Christine
May Christian
Roosen Andreas
Hoechst Aktiengesellschaft
Mayes M. Curtis
Simmons David A.
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