Patent ID: 8741209
Filing Date: 2014-06-03
Classification: B28B,C04B,Y10T

Abstract:
1. A method of forming a honeycomb green body, the method comprising: forming an extrudable mixture of a ceramic forming component, an aqueous liquid vehicle, an alkyl cellulosic binder, and an extrudable mixture stabilizer comprising a source of acetate anion in an amount of from 0.2 to 1.5 wt % added to the mixture as an aqueous solution; and extruding the mixture to form the honeycomb green body having superior strength properties as measured by breaking strain, scant modulus, peak load, and stiffness, and superior skin properties as measured by the absence of streaking or cracking, the superior strength and superior skin properties being compared to a green body prepared without the stabilizer, wherein the source of an acetate anion stabilizer includes a cation selected from a group consisting of an alkali metal cation, an alkali earth metal cation, ammonium cation, and a mixture thereof.