| 摘要 |
The purpose of the present invention is to provide a lubricant for ceramic extrusion molding, which makes it possible to produce a ceramic extrusion-molded article having excellent lubricity, surface smoothness and shape-retaining properties when the lubricant is used in the molding of the ceramic extrusion-molded article and enables the reduction of cracking of the ceramic extrusion-molded article during the drying of the ceramic extrusion-molded article. The lubricant (D) for ceramic extrusion molding according to the present invention comprises a polyether (A) having a number average molecular weight of 6,000 to 30,000, wherein the polyether (A) is a polyether (A1) produced by adding an alkylene oxide to a compound having active hydrogen, an alkyl ether (A2) of the polyether (A1) and/or an ester (A3) of the polyether (A1), the alkylene oxide is ethylene oxide alone or a combination of ethylene oxide and an alkylene oxide having 3 carbon atoms, the ratio of the amount of ethylene oxide to the amount of the alkylene oxide having 3 carbon atoms is 30/70 to 100/0 by weight, and the kinematic viscosity of the polyether (A) is 200 to 20,000 (mm2/s) at 100˚C. |
