Patent ID: 6663965
Filing Date: 2003-12-16
Classification: C09K,Y10S,Y10T

Abstract:
A material comprising an inorganic support having surface OH groups, said support having grafted thereon a layer of a thermo-reversible polymer having a phase transition temperature designated as the Lower Critical Solution Temperature (LCST) and being hydrophilic below the LCST and hydrophobic above the LCST, wherein the thermo-reversible polymer results from the polymerization of a monomer of formula: where X is hydrogen or CH3, Z and Y each represent of hydrogen or a straight-chain or branched alkyl group containing from 1 to 6 atoms of carbon. Z and Y can be combined to form a heterocycle, and Z and Y cannot both be hydrogen, wherein said thermo-reversible polymer has an end-function that allows it to be grafted onto said inorganic support having surface OH groups, andwherein the inorganic support has further grafted thereon groups of formula where R2 is an alkyl group of from 1 to 10 carbon atoms, or a trifluoroalkyl group of from 1 to 10 carbon atoms.