US 5,473,008 A · Casting composition for producing green ceramic sheets containing polyvinyl alcohol/fatty acid ester as dispersant

Abstract

The invention relates to a casting composition comprising a ceramic powder, an organic solvent, binder, plasticizer and a dispersant, which composition is suitable for producing green ceramic sheets by the tape casting process. The dispersant present in the casting composition of the invention is a polyvinyl alcohol/fatty acid ester having a degree of conversion in the range from 50 to 100%. The invention also relates to the use of such a casting composition for producing ceramic green sheets and a process for producing ceramic substrates using a green sheet thus produced.

Claims20

Dependent claims

A casting composition suitable for producing green ceramic sheets comprising a ceramic powder, an organic solvent, a binder, a plasticizer, and a dispersant comprising a polyvinyl alcohol/fatty acid ester having a degree of conversion in the range from 50 to 100%.

Dependencies are inferred from the claim text.

Facts

Application

08/245,534Filed 18 May 1994

Priority

DE 43 16 924.420 May 1993

Granted

5 Dec 1995

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

C04B 35/63416
Obtained by reactions only involving carbon-to-carbon unsaturated bonds: polyvinylalcohols [PVA]; Polyvinylacetates
C04B 35/63404
Polymers: obtained by reactions only involving carbon-to-carbon unsaturated bonds
Y10T 428/252
Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles:…
Y10T 428/264
Coating layer not in excess of 5 mils thick or equivalent: up to 3 mils

Casting composition for producing green ceramic sheets containing polyvinyl alcohol/fatty acid ester as dispersant

Life of this patent

Casting composition for producing green ceramic sheets containing polyvinyl alcohol/fatty acid ester as dispersant

Life of this patent

Abstract

Claims20