Patent DE-19846608-A1 (DE)
Title: Production of semipermeable membranes, useful for separation processes, from liquid prepared hydrolytic condensation of specified organosilanes
Inventor: WOLTER HERBERT
IPC: C08G77/22
Filed: 1998-10-09
Abstract: Process for producing a semipermeable membrane comprises preparing a low-viscosity to resin-like liquid by hydrolytic condensation of one or more specified organosilanes, forming the liquid into a membrane, optionally drying the membrane and then curing the membrane by thermal, radiation and/or chemical means. The liquid is prepared by hydrolytic condensation of one or more compounds of formula (I)-(IV) and/or precondensates derived from (I)-(IV) and optionally one or more compounds of formula (V) and/or precondensates derived from (V), provided that the molar ratio of (I)+(II)+(III) to (IV) is 1:0-20, in the presence of water or humidity and optionally a solvent and/or a condensation catalyst, optionally with addition of one or more copolymerizable and/or (poly)additionable monomers and/or oligomers and/or one or more curing catalysts and/or one or more soluble and/or volatile pore-forming additives: [Image] R : 1-15C alkyl, alkenyl, aryl, alkaryl or aralkyl, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; R 1>, R 2>0-15C alkylene, arylene or arylenealkylene, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; R 3>H, R 2>-R 1>-R 4>-SiX xR 3-x, COOH or R; R 4>(CHR 6>-CHR 6>) n, CHR 6>-CHR 6>-S-R 5>, CO-S-R 5>, CHR 6>-CHR 6>-NR 6>-R 5>, Y-CS-NH-R 5>, S-R 5>, Y-CO-NH-R 5>, CO-O-R 5>, Y-CO-C 2H 3(COOH)-R 5>, Y-CO-C 2H 3(OH)-R 5>or CO-NR 6>-R 5>; n : 0 or 1; R 5>1-15C alkylene, arylene or arylenealkylene, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; R 6>H or 1-10C alkyl or aryl; R 7>H or R; Y : O, S or NR 6>; Z : O or (CHR 6>) m; m : 1 or 2; a, b : 1-3, but not both 1; c : 1-6; x : 1-3; x : 1-3; a+x : 2-4. B[A-(Z) d-R 1>(R 2>)-R 3>-SiX aR b] c(II) B : a 4-50C linear or branched organic group containing at least one C=C double bond; R : 1-15C alkyl, alkenyl, aryl, alkaryl or aralkyl, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; R 3>0-15C alkylene, arylene, arylenealkylene or alkylenearylene, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; X : H, halogen, OH, alkoxy, acyloxy, alkanoyl, alkoxycarbonyl or NR 2; R : H, alkyl, aryl or alkaryl; A : O, S, NH or COO; d : 0 or 1; Z : CO or CHR'; R' : H, alkyl, aryl or alkaryl; R 1>Q or N; Q : 1-10C alkylene, arylene or alkylenearylene, optionally interrupted by O and/or S atoms and/or amino groups; R 2>H, COOH or OH; a : 1-3; b : 0-2; a+b : 3; c : 1-4; provided that: (a) A : O, S or NH when d = 1, Z = CO, R 1>= Q and R 2>= H or COOH; (b) A = O, S, NH or COO when d = 1, Z = CHR', R 1>= Q and R 2>= OH; (c) A = O, S, NH or COO when d = 0, R 1>= Q and R 2>= OH; and (d) A = S when d = 1, Z = CO, R 1>= N and R 2>= H. {X aR bSi[(R'A) c] (4-a-b)xB (III) A : O, S, PR, POR, NHC(O)O or NHC(O)NR; B : a linear or branched group derived from a compound B' containing 5-50 C atoms and at least one (when c = 1 and A = NHC(O)O or NHC(O)NR) or at least two C=C double bonds; R : 1-15C alkyl, alkenyl, aryl, alkaryl or aralkyl, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; R' : alkylene, arylene or alkylenearylene; R : H, alkyl, aryl or alkaryl; X : H, halogen, OH, alkoxy, acyloxy, alkanoyl, alkoxycarbonyl or NR 2; a : 1-3; b : 0-2; c : 0 or 1; x : an integer whose maximum value corresponds to the number of double bonds in B' minus 1 or is equal to the number of double bonds in B' when c = 1 and A = NHC(O)O or NHC(O)NR; alkyl : optionally substituted 1-20C linear, branched or cyclic alkyl; alkenyl : optionally substituted 2-20C linear, branched or cyclic alkenyl; aryl : optionally substituted phenyl, naphthyl or biphenylyl; alkoxy, acyloxy, alkanoyl, alkoxycarbonyl, alkaryl, aralkyl, arylene, alkylene and alkylenearylene are derived from alkyl and aryl groups as defined above. Y aSiX xR 4-a-x(IV) R : 1-15C alkyl, alkenyl, aryl, alkaryl or aralkyl, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; X : H, halogen, OH, alkoxy, acyloxy, alkanoyl, alkoxycarbonyl or NR 2; R : H, alkyl, aryl or alkaryl; Y : an organic group with 1-30 C atoms and 1-5 SH groups; a, x : 1-3; a+x : 2-4. X aSiR 4-a(V) R : 1-15C alkyl, alkenyl, aryl, alkaryl or aralkyl, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; X : H, halogen, OH, alkoxy, acyloxy, alkanoyl, alkoxycarbonyl or NR 2; R : H, alkyl, aryl or alkaryl; a : 1-3. An independent claim is also included for a semipermeable membrane obtainable by such a process.