(WO200009588-A1)   NOVELTY - Side chain modification of aryl main chain polymers, which can be deprotonated with organometallic compounds, with aryl-containing N-basic groups, with addition of tertiary N-basic groups containing aromatic ketone and aldehyde to metallized polymer P-Me, and protonation with water or etherification with halogen alkanes of the Me-alcoholate intermediate compound obtained is new.    USE - The ion exchange polymer membranes are useful in membrane processes such as polymer electrolyte membrane fuel cells, direct methanol fuel cells, diffusion dialysis, electrodialysis (claimed). The hydrophilic polymers are useful for reverse osmosis, nanofiltration, gas permeation, pervaporation (sic), and perstraktion (sic) (claimed).    ADVANTAGE - The polymers give membranes of good thermal and mechanical stability and avoid some drawbacks of previously used materials, e.g. poor chemical stability of vinyl polymers, e.g. polyvinylpyridine, and the carcinogenic danger of polyethyleneimines.    (EP1105433-A1)   NOVELTY - Side chain modification of aryl main chain polymers, which can be deprotonated with organometallic compounds, with aryl-containing N-basic groups, with addition of tertiary N-basic groups containing aromatic ketone and aldehyde to metallized polymer P-Me, and protonation with water or etherification with halogen alkanes of the Me-alcoholate intermediate compound obtained is new.    USE - The ion exchange polymer membranes are useful in membrane processes such as polymer electrolyte membrane fuel cells, direct methanol fuel cells, diffusion dialysis, electrodialysis (claimed). The hydrophilic polymers are useful for reverse osmosis, nanofiltration, gas permeation, pervaporation (sic), and perstraktion (sic) (claimed).    ADVANTAGE - The polymers give membranes of good thermal and mechanical stability and avoid some drawbacks of previously used materials, e.g. poor chemical stability of vinyl polymers, e.g. polyvinylpyridine, and the carcinogenic danger of polyethyleneimines.