A SURFACE ACTIVE PREPARATION USED IN THE FORMULATION OF COATINGS TO BE APPLIED TO HONEYCOMB FILTER SUBSTRATES USED IN CATALYTIC FILTERS. THE PREPARATION IS AN AMMONIUM POLYACRYLATE AQUEOUS SOLUTION USED TO PREVENT EXCESSIVE RESIDUE BEING DEPOSITED ON THE COATING MATERIAL DURING THE MANUFACTURING PROCESS.

CLASSIFICATION IS DETERMINED ACCORDING TO GIRS 1 AND 6 AS WELL AS THE TEXT OF CN CODE 340290 10.