Patent DE-19846608-B4 (DE)
Title: Production of semipermeable membranes, useful for separation processes, from liquid prepared hydrolytic condensation of specified organosilanes
Inventor: WOLTER HERBERT
IPC: C08G77/20
Filed: 1998-10-09
Granted: 2006-04-27
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; - R1, R2 = 0-15C alkylene, arylene or arylenealkylene, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; - R3 = H, R2-R1-R4-SiXxR3-x, COOH or R; - R4 = (CHR6-CHR6)n, CHR6-CHR6-S-R5, CO-S-R5, CHR6-CHR6-NR6-R5, Y-CS-NH-R5, S-R5, Y-CO-NH-R5, CO-O-R5, Y-CO-C2H3(COOH)-R5, Y-CO-C2H3(OH)-R5 or CO-NR6-R5; - n = 0 or 1; - R5 = 1-15C alkylene, arylene or arylenealkylene, optionally containing O and/or S atoms and/or ester, carbonyl, carboxyl, amide and/or amino groups; - R6 = H or 1-10C alkyl or aryl; - R7 = H or R; - Y = O, S or NR6; - Z = O or (CHR6)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-R1(R2)-R3-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; - R3 = 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; - R1 = Q or N; - Q = 1-10C alkylene, arylene or alkylenearylene, optionally interrupted by O and/or S atoms and/or amino groups; - R2 = 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, R1 = Q and R2 = H or COOH; (b) A = O, S, NH or COO when d = 1, Z = CHR', R1 = Q and R2 = OH; (c) A = O, S, NH or COO when d = 0, R1 = Q and R2 = OH; and (d) A = S when d = 1, Z = CO, R1 = N and R2 = 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,