Patent ID: 6362246
Filing Date: 2002-03-26
Classification: B01L,C03C,C08G,C09D,Y10T

Abstract:
A coating formulation for making a hard porous coating on an article, said formulation comprising 100 parts by weight hardenable resinous material, and from about 0.1 part by weight to about 50 parts by weight blowing agent based on the 100 parts by weight resinous material, said blowing agent capable of generating gas under conditions for hardening said resinous material, said resinous material having a hardening time sufficiently short to entrap gas generated by said blowing agent and to prevent release of substantially all gas generated upon activation of said blowing agent, wherein said formulation is hardenable upon application to a surface of an article to form a porous coating which is scratch resistant to a #4 pencil.