Patent · US Expired

Process for the production of ceramic green films

US4968473A · kind A · utility

0Cited by

2References

6Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Hans D. Hermann · Bad Soden am Taunus, DE
Dieter Grote · Marktredwitz, DE
Karl Waldmann · Bad Soden am Taunus, DE

Key dates

Filing date	Dec 7, 1988
Grant date	Nov 6, 1990
Priority date	—
Expiry date	Dec 7, 2008

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K23/46
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Ceramic green films having advantageous isotropic distribution of the inorganic pigment can be obtained by casting and drying a slip containing finely divided inorganic pigment, organic solvents, polyvinylbutyral, plasticizer and dispersing agent if compounds which contain in their molecules at least one structural unit of the formula Z ##STR1## in which A and B, which must be different, stand for either the oxyalkylene unit --C.sub.3-4 H.sub.6-8 O-- or the oxyalkylene unit --C.sub.2 H.sub.4 O-- and x and y, which can be identical or different, each denote a number from 1 to 200, are used as dispersing agents. Ceramic green films produced according to the invention can be converted to isotropic ceramic substrates by subsequent heat treatment and sintering.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.