Ceramic precursor batch compositions for increased stiffening onset temperature using organic additive heteroatom polyols

Patent metadata

Field	Value
Publication number	US-9850171-B2
Application number	US-201514961351-A
Country	US
Kind code	B2
Filing date	Dec 7, 2015
Priority date	Oct 30, 2012
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A ceramic precursor batch composition comprising inorganic ceramic-forming ingredients, a binder, an aqueous solvent and a heteroatom polyol agent. The heteroatom polyol agent can be represented by X(R) where X is at least one of S, N, and P, and R is at least two of CH 3 , CH 2 CH 2 OH, CH 2 CH 2 CH 2 OH, CH 2 (CHOH)CH 3 , C(CH 2 OH) 1-3 , CH 2 OH, CH(CH 2 OH)CHOH, C(O)(CHOH) 1-4 CH 2 OH, and CH 2 CH 2 CH 2 OCH 3 . The presence of the heteroatom polyol agent provides a composition with a lower viscosity and/or a greater batch stiffening temperature (T onset ) allowing for increased rates of extrusion. Methods for producing a ceramic honeycomb body using this ceramic precursor batch composition are also provided.

First claim

What is claimed is:

1. A ceramic precursor batch composition, comprising:
inorganic ceramic-forming ingredients;
a cellulose-based binder;
an aqueous-based solvent; and
a heteroatom polyol agent, wherein the heteroatom polyol agent is represented by X(R) where X is at least one of S and P, and R is at least two of CH 2 CH 2 OH, CH 2 CH 2 CH 2 OH, CH 2 (CHOH)CH 3 , C(CH 2 OH) 1-3 , CH 2 OH, CH(CH 2 OH)CHOH, and C(O)(CHOH) 1-4 CH 2 OH, or at least one of C(CH 2 OH) 2-3 , CH(CH 2 OH)CHOH, and C(O)(CHOH) 1-4 CH 2 OH combined with at least one of CH 3 and CH 2 CH 2 CH 2 OCH 3 .

2. The ceramic precursor batch composition of claim 1 , wherein the heteroatom polyol agent comprises thiodiethanol (“TDE”), 2-[(2-methoxyethyl)sulfanyl]ethanol, 3,3′-thiodipropanol (“TDP”), tris-(2-hydroxyethyl)-sulfonium chloride, 2,2′-sulfinyldiethanol, tetrakis(hydroxymethyl)phosphonium chloride solution, bis[tetrakis(hydroxymethyl)phosphonium] sulfate solution, or combinations thereof.

3. The ceramic precursor batch composition of claim 1 , wherein the heteroatom polyol agent comprises thiodiethanol, thiodipropanol, or combinations thereof.

4. The ceramic precursor batch composition of claim 1 , further comprising up to 60 weight % of a pore forming material wherein the weight % is based on 100% of the inorganic ceramic-forming ingredients.

5. The ceramic precursor batch composition of claim 4 , wherein the pore forming material is at least one of starch and graphite.

6. The ceramic precursor batch composition of claim 1 , further comprising a pore forming material, wherein the pore forming material is at least one of starch and graphite.

7. The ceramic precursor batch composition of claim 1 , wherein the precursor batch composition comprises the heteroatom polyol agent in a concentration of from about 2.5 wt % aqueous solution to about 20 wt % aqueous solution.

8. The ceramic precursor batch composition of claim 7 , wherein the precursor batch composition comprises the heteroatom polyol agent in a concentration of from about 8 wt % aqueous solution to about 15 wt % aqueous solution.

9. The ceramic precursor batch composition of claim 1 , wherein the inorganic ceramic-forming material comprises cordierite or aluminum titanate-forming ingredients.

10. The ceramic precursor batch composition of claim 1 , wherein the cellulose-based binder comprises methylcellulose, ethylhydroxy ethylcellulose, hydroxybutyl methylcellulose, hydroxymethylcellulose, hydroxypropyl methylcellulose, hydroxylethyl methylcellulose, hydroxybutyl methylcellulose, hydroxyethylcellulose, hydroxypropylcellulose, sodium carboxy methylcellulose or combinations thereof.

Assignees

• Corning Inc

Inventors

• Lewis Mark Alan

Classifications

• C04B38/0645

  Burnable, meltable, sublimable materials · CPC title

• C04B26/285

  Cellulose or derivatives thereof (C04B26/24 takes precedence) · CPC title

• C04B35/6365

  Cellulose or derivatives thereof · CPC title

• C04B35/195

  Alkaline earth aluminosilicates, e.g. cordierite {or anorthite} · CPC title

• C04B2235/6021

  Extrusion moulding · CPC title