Process for producing cemented and skinned ceramic honeycomb structures
AssigneeDow Global Technologies LLC
InventorsPaul C. Vosejpka, Jun Cai, Ashish Kotnis
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Abstract
Organic polymer particles are provided in a cement composition that is used to apply a skin to a ceramic honeycomb, or to bond the ceramic honeycomb to another honeycomb or another material. The presence of the organic polymer particles reduces the penetration of the cement composition through porous walls of the honeycomb. In this way, less blocking of the honeycomb cells is seen, and the reduction in thermal shock performance that is often seen when cement compositions are applied to ceramic honeycombs is reduced.
Claims14
A method for applying a cementitous layer onto a porous ceramic honeycomb structure, comprising the steps of (a) applying a cement composition to at least one porous surface of a ceramic honeycomb containing multiple axially-extending cells defined by intersecting porous walls and (b) firing the honeycomb and cement composition, wherein the cement composition comprises at least one inorganic binder, at least one inorganic filler, a carrier fluid and organic polymer particles having a size from about 10 nanometers to 250 nanometers dispersed in the carrier fluid.
Dependencies are inferred from the claim text.