An organic acid containing solution obtained by adding an organic acid having an alkyl group to a solution including silanol condensate particles is applied on a substrate so as to form a coating film. The coating film is heat treated so as to form a porous film.

The invention provides modified stonework material as well as modified woven fabric, paper, and ligneous materials with improved water-proof, dust-prevention, wear-resistance, and others. These porous materials are rendered non-porous by causing aqueous solution of alkali silicate to penetrate into such porous materials to produce calcium silicate and colloidal silicic acid in the presence of ammonium ions and halogen ions, the solution of which fills the voids in the material perfectly to rende...

A substrate coating is provided for application in association with ink jet ink imaging on the substrate. The coating enhances permanence of black and specialty non-black color ink jet prints. The coating material of the present invention can be applied to any non-porous or semi-porous substrate as a pre-print coating. The coating comprises a combination of two polymers, and DMEA to discourage adverse interaction between the two polymers.

An organic acid containing solution obtained by adding an organic acid having an alkyl group to a solution including silanol condensate particles is applied on a substrate so as to form a coating film. The coating film is heat treated so as to form a porous film.

A porous material is disclosed, made of a semi IPN type polymer alloy of a crosslinked polymer (A) obtained by the crosslinking polymerization of a crosslinking-polymerizable vinyl monomer and/or oligomer (a) with a non-crosslinked polymer (D) which is soluble in a solvent (B) capable of dissolving said monomer and/or oligomer (a) therein and subjecting said crosslinked polymer (A) to gelation but is insoluble in a coagulating solution (C) which is compatible with said solvent (B) but doesn't su...

The present invention provides a porous titania, which has an anatase-form crystalline structure, an anatase-form crystallite diameter of 3 nm to 10 nm, a degree of anatase crystallinity of 60% or more, a BET specific surface area of 10 m.sup.2 /g or more, a total pore volume of 0.05 cm.sup.3 /g or more, and a volume for pores having a pore radius of 1 nm or more of 0.02 cm.sup.3 /g or more, and the porous titania and the catalyst comprising the porous titania of the present invention exhibit an...

A porous article having excellent heat resistance, a finely cellular structure, and a low dielectric constant; and a process for producing the porous article which comprises subjecting a polymer composition having a micro-domain structure comprising a continuous polymer phase and dispersed therein a discontinuous phase having an average diameter smaller than 10 .mu.m to a treatment for removing the ingredient constituting the discontinuous phase by at least one operation selected from vaporizati...

A porous polyimide having a finely cellular structure and having a low dielectric constant and heat resistance. The porous polyimide can be produced by a process comprising adding a dispersible compound to a polyimide precursor to form a micro-domain structure in which the dispersible compound is dispersed in the polymer so as to have a size smaller than 10 .mu.m and then removing the dispersible compound by extraction with supercritical carbon dioxide to thereby make the precursor porous, where...

The present invention provides a porous titania, which has an anatase-form crystalline structure, an anatase-form crystallite diameter of 3 nm to 10 nm, a degree of anatase crystallinity of 60% or more, a BET specific surface area of 10 m.sup.2 /g or more, a total pore volume of 0.05 cm.sup.3 /g or more, and a volume for pores having a pore radius of 1 nm or more of 0.02 cm.sup.3 /g or more, and the porous titania and the catalyst comprising the porous titania of the present invention exhibit an...

A porous media burner comprises an outer casing of impermeable material separated by a gas distributing space from an inner hollow core, open at one end, of a porous medium. The fuel mixture enters the gas distributing space between the casing and the core and then passes through the core to the hollow space of the core.