(DE19510026-A1)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.    (DE19545642-A1)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.    (DE19548423-A1)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.    (DE19610303-A1)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.    (EP815160-A1)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.    (JP11502249-W)      Sulphonated aromatic polyether-ketones (PEK) contg. units of formula -[Ar-O]p-Ar-[(CO-Ar')x-O-Ar]m-[CO-Ar']y-[O-Ar]n-CO]- (II) are claimed, in which 1-100% of the -O-phenylene-CO- units are substd. with a SO3M gp., sulphonated and unsulphonated -O-phenylene-CO- gps., and sulphonated and unsulphonated -O-phenylene-O- gps. in any sequence. In (II), Ar = p- and/or m-phenylene (p- and/or m-Phe); Ar' = phenylene, naphthylene, biphenylene, anthrylene or other arylene; M = H, NR4+ (R = H or 1-4C alkyl) or a metal, pref. an alkali(ne earth) metal or sub-Gp. 8 metal; x, n and m = 0 or 1; y = 0, 1, 2 or 3; and p = 1, 2, 3 or 4.    Also claimed are: (i) a process for the prodn. of (II); (ii) a polymeric electrolyte soln. contg. (II); and (iii) a film with a thickness of 5 m to 1 mm contg. (II).    USE -   Solns. (ii) are used for the prodn. of asymmetric membranes and compact films to give intimate contact between two polymer electrolyte surfaces and for producing a porous or rough surface after contacting the soln. with a pptn. agent (claimed). Polymers (II) are used for the prodn. of polymeric electrolyte solns. and/or polymer films, and in electrochemical cells, esp. fuel cells or electrolysis cells (claimed).    ADVANTAGE -   Enables the controllable prodn. of new sulphonated PEK polymers by sulphonation of PEK under mild conditions including the sulphonation of -O-phenylene-CO- units (-O-Phe-CO- units). Polymers with more than a certain deg. of sulphonation are soluble.