Patent ID: 6830782
Filing Date: 2004-12-14
Classification: C08J,D06M,D21H,H01M,Y02E

Abstract:
A method of modifying a polymeric material for improving a hydrophilic property, water absorption property or adhesion property which comprises:(a) subjecting the polymeric material to an activation step for introducing a double bond or a functional group containing at least a carbonyl group on the surface of the polymeric material to the extent that a trace of the formation of the carbonyl group is observed from a ratio of about 0.2 or less of an absorbance at around 1710 cmâˆ’1 due to carbonyl groups introduced in the surface of polymeric material to an absorbance of the crystalline region not changed by the activation step by employing a base line method of infrared spectroscopy; and (b) treating the activated polymeric material produced in said activation step with a hydrophilic polymer in the presence of a catalyst or an initiator under conditions effective to produce said modified polymer, wherein the weight increase of the treated polymeric material is less than 5 wt %.