| abstract |
The present invention provides that a porous ceramic catalyst support or filter provided to have a catalyst coating by an oxide wash coating process is pre-coated with cross-linked polymer barrier layers to washcoat the microcracked and / or microporous surface of the ceramic. Blocking nanoparticle penetration, the barrier coating can be formed by a thermally cross-linked hydrocarbon polymer that vaporizes at an appropriate washcoat stabilization or catalytic activity temperature and can selectively block the micropore / microchannel pore volume of the article.n n n n Porous ceramic filter, cross-linked, polymer solution, catalyst coating, washcoat |