Patent EP-0985443-A2 (EP)
Inventor: WOLTER HERBERT DR
IPC: B01D67/00
Filed: 1999-07-15
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: 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>-SiXxR3-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-C2H3(COOH)-R<5>, Y-CO-C2H3(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>-SiXaRb)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 NR2;   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. (XaRbSi((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 NR2;   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. YaSiXxR4-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 NR2;   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. XaSiR4-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 NR2;   R = H, alkyl, aryl or alkaryl; a = 1-3. An Independent claim is also included for a semipermeable membrane obtainable by such a process.