US4607070A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyether-copolycarbonates for dialysis membranes
Assignee: Bayer AG
•
Filing: 1984-09-26
•
Granted: 1986-08-19
•
Expires: 2004-09-26
Abstract
Abstract The present invention is directed to a process for the preparation of a segmented, aliphatic-aromatic polyether-copolycarbonate containing structural units conforming to ##STR1## wherein --D-- is a diphenolate radical and units conforming to ##STR2## wherein --O--Polyether--O-- is an aliphatic polyether-diolate radical, by the phase boundary process in which aliphatic polyether diol and a mixture of dihydroxy compounds are reacted with a carbonic acid halide which is employed in molar excess in relation to the dihydroxy compounds and in which the aqueous phase is kept at a pH value of at least 13 and where the polycondensation reaction is carried out in a reactor by addition of an amine catalyst. The invention is further directed to the polyether polycarbonate which is obtained by the process and to the preparation of membranes from said polyether copolycarbonate.
Inventors
- 👤 Manfred Schreckenberg
- 👤 Rolf Dhein
- 👤 Ralf Lange
- 👤 Werner Waldenrath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:39
CPC Classifications
B; B01; B01D; B01D71/00; B01D71/06; B01D71/76; B01D71/80; B01D67/00; B01D67/0002; B01D67/0009; B01D67/0011; B01D67/00111; B01D71/52; B01D71/521; B01D71/5211; C; C08; C08G; C08G64/00; C08G64/18; C08G64/183; B01D71/50
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
227 words
A process for the preparation of a segmented, aliphatic-aromatic polyether-copolycarbonate having a weight average molecular weight of 50,000 to 350,000 and containing about 95 to about 65% by weight of aromatic carbonate structural units of the formula (I) ##STR10## wherein --D-- is a diphenolate radical, and about 5 to about 35% by weight of polyether carbonate structural units of the general formula (II) ##STR11## wherein --O--Polyether--O-- is an aliphatic polyether-diolate radical having a number average molecular weight of 600 to 20,000 by the reaction in the phase boundary process in a mixture of organic solvent and aqueous alkaline phase at a temperature from 0° C. to 35° C., of corresponding amounts of an aliphatic polyether diol having a number average molecular weight of 600 to 20,000, a mixture of aromatic dihydroxy compounds and a carbonic acid halide wherein: (a) the carbonic acid halide is used in a molar excess based on the total number of mols of said aromatic dihydroxy compounds and aliphatic polyether diol, said aromatic dihydroxy compounds comprising 50 to 99% by weight of bisphenol-A and 50 to 1% by weight of at least one other diphenol, (b) the aqueous phase is maintained at a pH of at least 13, and (c) the polycondensation reaction is carried out in a reactor and is catalyzed by an amine catalyst, the polyether-polycarbonate being isolated, purified and dried.
Claim 2
Dependent Claim
227 words
A process for the preparation of a segmented, aliphatic-aromatic polyether-copolycarbonate having a weight average molecular weight of 50,000 to 350,000 and containing about 95 to about 65% by weight of aromatic carbonate structural units of the formula (I) ##STR10## wherein --D-- is a diphenolate radical, and about 5 to about 35% by weight of polyether carbonate structural units of the general formula (II) ##STR11## wherein --O--Polyether--O-- is an aliphatic polyether-diolate radical having a number average molecular weight of 600 to 20,000 by the reaction in the phase boundary process in a mixture of organic solvent and aqueous alkaline phase at a temperature from 0° C. to 35° C., of corresponding amounts of an aliphatic polyether diol having a number average molecular weight of 600 to 20,000, a mixture of aromatic dihydroxy compounds and a carbonic acid halide wherein: (a) the carbonic acid halide is used in a molar excess based on the total number of mols of said aromatic dihydroxy compounds and aliphatic polyether diol, said aromatic dihydroxy compounds comprising 50 to 99% by weight of bisphenol-A and 50 to 1% by weight of at least one other diphenol, (b) the aqueous phase is maintained at a pH of at least 13, and (c) the polycondensation reaction is carried out in a reactor and is catalyzed by an amine catalyst, the polyether-polycarbonate being isolated, purified and dried.
Claim 3
Dependent Claim
15 words
Process according to claim 1 wherein the radical --D-- has up to 30 carbon atoms.
Claim 4
Dependent Claim
15 words
Process according to claim 1 wherein --O-- polyether--O-- has a Mn of 4,000 to 10,000.
Claim 5
Dependent Claim
29 words
The process of claim 1 wherein said reaction in the phase boundary process further includes a monophenolic chain stopper conforming to ArOH where Ar is a carbocyclic, aromatic radical.
Claim 6
Dependent Claim
15 words
Process according to claim 4 wherein the radical Ar contains 6 to 16 carbon atoms.
Claim 7
Dependent Claim
29 words
Process according to claim 1 wherein the carbonic acid halide is used in a molar excess of 70 to 200 mol %, on the basis specified in claim 2.
Claim 8
Dependent Claim
29 words
Process according to claim 1 wherein the diphenol comprises 70 to 98% by weight of bisphenol A and 30 to 2% by weight of at least one other diphenol.
Claim 9
Dependent Claim
33 words
Process according to claim 1 wherein the other diphenol is a bis-(hydroxyphenyl)-alkane, a dihydroxy-diphenyl, a bis-(hydroxyphenyl)-cycloalkane, a bis-(hydroxyphenyl) sulphide, a bis-(hydroxyphenyl) ether, a bis-(hydroxyphenyl) sulphone, and α, α'-bis-(hydroxyphenyl)-disopropylbenzene, or a nuclear-alkylated compound thereof.
Claim 10
Dependent Claim
13 words
Process according to claim 8 wherein the other diphenol is 1,1-bis-(4-hydroxyphenyl)-cyclohexane or 2,2-bis-(3,5-dimethyl-4-hydroxyphenyl)-propane.
Claim 11
Dependent Claim
66 words
Process according to claim 1 wherein the other diphenol is a compound of the general formula ##STR12## wherein X denotes a single bond, --CH 2 --, ##STR13## --S--, SO 2 or ##STR14## and Y 1 and Y 4 are identical or different and each denotes hydrogen or C 1 -C 4 -alkyl, or X is 2,2-isopropylidene when at least one radical Y is an alkyl substituent.
Claim 12
Dependent Claim
26 words
Process according to claim 1 wherein the organic solvent is methylene chloride, ethylene chloride, chloroform, 1,2-dichloropropane, toluene, chlorobenzene, or a mixture of any two or more.
Claim 13
Dependent Claim
22 words
Process according to claim 1 wherein the aqueous alkaline phase comprises lithium hydroxide, sodium hydroxide, potassium hydroxide, calcium hydroxide and/or barium hydroxide.
Claim 14
Dependent Claim
22 words
Process according to claim 1 wherein the polycondensation reaction is catalysed by trimethylamine, triethylamine, n-tripropylamine, n-tributylamine, N-ethylpiperidine or a quaternary ammonium salt.
Claim 15
Dependent Claim
12 words
Process according to claim 1 wherein the carbonic acid halide is phosgene.
Claim 16
Dependent Claim
37 words
Process according to claim 1, wherein (d) after the polycondensation, but before the isolation of the polyether-copolycarbonate, a phenolic stabiliser is added in an amount of 10 to 1000 ppm, based on the weight of the polyether-copolycarbonate.
Claim 17
Dependent Claim
16 words
Process according to claim 15 wherein the phenolic stabiliser is 3-tert.-butyl-4-methoxyphenol, 2-tert.-butyl-4-methoxyphenol, 2,6-di-tert.-butyl-4-methylphenol, 3-(3,5-di-tert.-butyl-4-hydroxyphenyl)-propionate or 1,3,5-tris-(4,-tert.-butyl-(3-hydroxy-2,5-dimethylbenzyl)-1,3,5-triazine-2,4,6-(1H,3H,5H)-trione.
Claim 18
Dependent Claim
9 words
A polyether-polycarbonate obtainable by the process of claim 1.
Claim 19
Dependent Claim
38 words
A polyether-polycarbonate as claimed in claim 17, composed of 70% to 90% by weight of carbonate structural units of the general formula (I) and 10% to 30% by weight of polyether-carbonate structural units of the general formula (II).
References Cited (Backward Citations)
US30856A
Cited
US3875112A
Cited
US3890266A
Cited
US4115358A
Cited
US4160791A
Cited
USRE30856E
Cited
US4054597A
Cited
US4260537A
Cited
US4169868A
Cited
US4217437A
Cited
US4281101A
Cited
US4333809A
Cited
US4374959A
Cited
US4400491A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-18 | 1990-02-17 | 1990-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-18 | 1994-02-17 | 1994-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-18 | 1998-02-17 | 1998-08-19 | $7700.00 | Window Closed / Lapsed |