Composition for extrusion-molded bodies comprising a methyl cellulose

Patent metadata

Field	Value
Publication number	US-9353011-B2
Application number	US-201113880179-A
Country	US
Kind code	B2
Filing date	Oct 27, 2011
Priority date	Nov 8, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

A methyl cellulose having a DS(methyl) of from 1.10 to 1.61 is useful for increasing the wet green modulus of an extrusion-molded hollow body, particularly an extrusion-molded hollow body having a ceramic honeycomb structure.

First claim

What is claimed is:

1. A composition for producing extrusion-molded hollow bodies comprising
a) from 85 to 99.5 percent of an inorganic material that sets as a result of baking or sintering, and
b) from 0.5 to 15 percent of a methyl cellulose having a DS(methyl) of from 1.30 to 1.55, based on the total weight of the inorganic material a) and the methyl cellulose b),
wherein the composition does not comprise a styrenesulfonate.

2. The composition of claim 1 wherein the inorganic material is a ceramic-forming material.

3. The composition of claim 1 wherein the inorganic material is an alumina or a precursor thereof, silica or a precursor thereof, an aluminate, aluminosilicate, alumina silica, feldspar, titania, fused silica, aluminum nitride, aluminum carbide, kaolin, cordierite, mullite, clay, bentonite, talc, zircon, zirconia, spinel, silicon carbide, silicon boride, silicon nitride, titanium dioxide, titanium carbide, boron carbide, boron oxide, borosilicate, soda barium borosilicate, a silicate, a sheet silicate, a silicon metal, carbon, ground glass, a rare earth oxide, soda lime, zeolite, barium titanate, lead titanate zirconate, aluminium titanate, barium ferrite, strontium ferrite, or a combination of two or more of such inorganic materials.

4. The composition of claim 1 , wherein the methyl cellulose b) has a viscosity of from 2000 to 40,000 mPa·s, determined in a 2% by weight aqueous solution at 20° C.

5. An extrusion-molded hollow body produced from the composition of claim 1 .

6. The extrusion-molded hollow body of claim 5 having a honeycomb structure.

Assignees

• Bayer Roland
• Grote Grit
• Dow Global Technologies Llc

Inventors

• Bayer Roland
• Grote Grit

Classifications

• B28B3/269

  For multi-channeled structures, e.g. honeycomb structures · CPC title

• C04B35/44

  based on aluminates · CPC title

• C04B35/486

  Fine ceramics · CPC title

• C04B35/491

  based on lead zirconates and lead titanates {, e.g. PZT} · CPC title

• C04B35/01

  based on oxide ceramics · CPC title