NOVELTY - An alkoxy silyl group-containing unsaturated monomer (A) (I) which has alkoxy silyl group(s) and ethylenically unsaturated bond(s) in a molecule, sulfonic acid group-containing unsaturated monomer (B) having sulfonic acid group(s) and ethylenically unsaturated bond(s) in a molecule and unsaturated monomer (C) containing phosphonic acid group-containing unsaturated monomer which has phosphonic acid group(s) and ethylenically unsaturated bond(s) in a molecule in presence of hydrophilicity polymerization catalyst and lipophilic polymerization catalyst.    USE - Manufacture of ion-conductive polymeric material used for preparing water-insoluble ion-conductive polymeric derivative (claimed) used as proton-conduction material. Uses include but are not limited to primary battery, secondary battery, fuel battery, display element, sensors, signal transmission medium, solid capacitor and ion-exchange membrane.    ADVANTAGE - The ion-conductive polymeric material is prepared efficiently without using glass fiber as reinforcing agent. The products using the insoluble ion-conductive polymeric derivative have high mechanical strength.    DETAILED DESCRIPTION - An alkoxy silyl group-containing unsaturated monomer of formula: CH2=C(-R1)-C(=O)-N(-R4)-(CH2)m-Si(R2)3-n-(OR3)n (A) (I) which has alkoxy silyl group(s) and ethylenically unsaturated bond(s) in a molecule, sulfonic acid group-containing unsaturated monomer (B) having sulfonic acid group(s) and ethylenically unsaturated bond(s) in a molecule and unsaturated monomer (C) containing phosphonic acid group-containing unsaturated monomer which has phosphonic acid group(s) and ethylenically unsaturated bond(s) in a molecule in presence of hydrophilicity polymerization catalyst and lipophilic polymerization catalyst.    R1=H or methyl;    R2-R4=H or optionally substituted alkyl;    m=1-6;and    n=1-3.    An INDEPENDENT CLAIM is included for water-insoluble ion-conductive polymeric derivative, which is obtained by hydrolytically-condensating one portion or all portion of alkoxy silyl group of ion-conductive polymeric material.