Patent ID: 8158196
Filing Date: 2012-04-17
Classification: B01D,B01J

Abstract:
1. A method of forming a porous crosslinked polymer coated substrate comprising the steps of: a) providing one or more room temperature water soluble polymer materials, a solvent for the room temperature water soluble polymer, one or more selected from the group consisting of multifunctional epoxy compounds, multifunctional bromyl compounds, multifunctional halides, multifunctional aldehydes, bis(2-hydroxy ethyl)sulfone, dimethyldichloro-silane, dimethylolurea, dimethylol ethylene urea, diisocyanates, polyisocyanates and mixtures thereof crosslinking agents for the room temperature water soluble polymer, and a porous substrate; b) adding the room temperature water soluble polymer, solvent and one or more crosslinking agents together as a mixture; c) stirring the mixture for period of time sufficient to dissolve all the components and form a room temperature water soluble polymer solution, d) applying the room temperature water soluble polymer solution onto the porous substrate; e) evaporating the solvent from the room temperature water soluble polymer solution on the substrate below the temperature at which the cross linking agent causes crosslinking of the polymer materials to form a porous dry room temperature water soluble polymer coating on the substrate; f) heating the porous dry room temperature water soluble polymer coating at a temperature of about 70° to 95° C. causing the cross linking agent to crosslink the water soluble polymer coating on the substrate, resulting in a porous cross-linked polymer coated substrate; g) rinsing the porous crosslinked polymer coated substrate to remove any residual one or more crosslinking agents from the crosslinked polymer coated structure; and h) applying a functional chemistry to the crosslinked polymer coated structure.