EP0000753B1 - Procédé de préparation de polycarbonates et polycarbonates obtenus - Google Patents
Procédé de préparation de polycarbonates et polycarbonates obtenus Download PDFInfo
- Publication number
- EP0000753B1 EP0000753B1 EP78100539A EP78100539A EP0000753B1 EP 0000753 B1 EP0000753 B1 EP 0000753B1 EP 78100539 A EP78100539 A EP 78100539A EP 78100539 A EP78100539 A EP 78100539A EP 0000753 B1 EP0000753 B1 EP 0000753B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polycarbonates
- polycarbonate
- parts
- mol
- bis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G64/00—Macromolecular compounds obtained by reactions forming a carbonic ester link in the main chain of the macromolecule
- C08G64/20—General preparatory processes
- C08G64/22—General preparatory processes using carbonyl halides
- C08G64/24—General preparatory processes using carbonyl halides and phenols
Definitions
- the present invention relates to a process for the preparation of aromatic polycarbonates according to the phase interface process from diphenols, which is characterized in that the catalysts used are N-ethylpyrrolidine, N-ethylpiperidine, N-ethylmorpholine, N-isopropylpiperidine or N-isopropylmorpholine in amounts of 0.01 mol% to 10 mol%, based on moles of diphenols used.
- the present invention also relates to the polycarbonates obtainable according to the process, which are notable for high light transmission and low yellowing tendency even after higher temperatures.
- the color stabilization of aromatic polycarbonates has hitherto preferably been carried out by adding additives, in particular phosphites (cf. DE-AS-1 128 653, DE-AS 2 140 207 and DE-OS 2 255 639), optionally in combination with other additives, for example with oxetane compounds (DE-OS 2 510 463).
- additives in particular phosphites (cf. DE-AS-1 128 653, DE-AS 2 140 207 and DE-OS 2 255 639), optionally in combination with other additives, for example with oxetane compounds (DE-OS 2 510 463).
- the method according to the invention uses a completely different principle, in that it uses the above-mentioned catalysts as catalysts in polycarbonate production by the two-phase interfacial polycondensation process (cf. DE-PS 959 497, DE-PS 1046311 and DE-PS 2 410 716) .
- N-methylpiperazine is used only with poor success as a catalyst for the production of polycarbonates. (Compare column 1, line 69 to column 2, line 27).
- polyamines including cyclic polyamines such as N, N-diethylpiperazine, are used for the production of polycarbonates.
- cyclic polyamines such as N, N-diethylpiperazine
- N-alkyl morpholines can be used as catalysts for the production of polycarbonates.
- special N-alkylmorpholines lead to polycarbonates with improved thermal stability compared to the catalysts also mentioned in these references, such as, for example, triethylamine.
- GB-PS 1072161 (see in particular page 2, lines 28 ff) describes the preparation of polycarbonates from di- ( ⁇ -trihalogen-a-hydroxyethoxy) alkanes, it being possible, inter alia, to use N-methylmorpholine as the tertiary base.
- N-methylmorpholine is not suitable as a catalyst according to the present invention.
- from 0.01 to 10 mol% preferably from 0.05 to 5 mol% and in particular from 0.05 to 2 mol%, based on moles of diphenols used, are used on the catalysts mentioned at the outset.
- N-ethylpiperidine is particularly suitable.
- the high molecular weight polycarbonates are produced according to the invention by the phase interface process.
- Diphenols in particular dihydroxydiarylalkanes or -cycloalkanes, for which, in addition to the unsubstituted dihydroxydiarylalkanes or -cycloalkanes, those which are substituted in the o-position to the phenolic hydroxyl groups are also suitable in the aqueous-alkaline phase, and one is used for the Added suitable polycarbonate solvent.
- phosgene is introduced at a temperature between 0 and 100 ° C and a pH between 9 and 14. The polycondensation takes place after the phosgenation.
- the catalysts suitable according to the invention can be added either before introducing phosgene or after introducing phosgene before polycondensation.
- the phosgene introduction times are between 1 and 60 minutes, the post-condensation between 2 and 120 minutes.
- the organic polymer solution is separated off and washed free of electrolytes with water.
- the polycarbonate can then be removed by evaporation of the solvent or by precipitation with non-solvents, e.g. Methanol or gasoline can be isolated.
- the polycarbonates produced by the process according to the invention can also be branched in a known manner.
- Suitable diphenols are, for example, hydroquinone, resorcinol, 4,4'-dihydroxydiphenyl, bis- (hydroxyphenyl) alkanes, such as, for example, C1-CS-alkylene- or C 2 -C 8 -alkylidene bisphenols, bis- (hydroxyphenyl) cycloalkanes, for example Cs-Cs-cycloalkylene or C 5 -C 6 -cycloalkylidene bisphenols, bis - (hydroxyphenyl) sulfides, ethers, ketones, sulfoxides or sulfones.
- ⁇ , ⁇ '- bis - (hydroxyphenyl) - diisopropylbenzenes and the corresponding nuclear alkylated or nuclear halogenated compounds Polycarbonates based on bis (4-hydroxyphenyl) propane-2,2 (bisphenol A), bis (4-hydroxy-3,5-dichlorophenyl) propane-2,2 (tetrachlorobisphenol A), bis are preferred - (4-hydroxy-3,5-dibromophenyl) propane - 2,2 (tetrabromobisphenol A), bis - (4-hydroxy-3,5-dimethylphenyl) propane - 2,2 (tetramethylbisphenol A), bis - ( 4-hydroxy-3-methyl-phenyl) -propane-2,2, bis - (4-hydroxyphenyl) -cyclohexane-1,1 (bisphenol Z) and based on trinuclear bisphenols such as a, a '- bis - (4 - hydroxy-phenyl) - diis
- the catalyst (see examples) is added to the resulting solution and the mixture is stirred for a further 15 minutes.
- a highly viscous solution is obtained, the viscosity of which is regulated by adding methylene chloride.
- the aqueous phase is separated off.
- the organic phase is washed free of salt and alkali with water.
- Polycarbonate is isolated from the washed-out solution and dried.
- the polycarbonate has a relative viscosity of 1.30-1.31, measured in a 0.5% solution of methylene chloride at 20 ° C. This corresponds approximately to a molecular weight of 34,000.
- the polycarbonate thus obtained is extruded and granulated.
- the reaction temperature is 72 ° C; the concentration of OH ions in the aqueous reaction phase is 0.08%.
- the average residence time is 1.4 minutes.
- the emulsion flowing out of the pump-around reactor is fed with additional sodium hydroxide solution to increase the OH concentration to 0.3 to 0.35%.
- the oligocarbonate is condensed in a reaction tube as described in DE-OS 1 920 302 or US Pat. No. 3,674,740.
- the average residence time is 4 minutes; the temperature 83 ° C.
- the aqueous reaction phase contains 0.32% OH ⁇ and 0.51% C0 3 ; There is no evidence of bisphenol.
- the polycarbonate solution is washed free of electrolytes, evaporated and isolated using an evaporation extruder.
- the polycarbonate has a relative viscosity of 1.30 to 1.31, measured in a 0.5% solution of methylene chloride at 20 ° C. This corresponds approximately to a molecular weight of 34,000.
- the polycarbonates were processed into test specimens.
- the test specimens are annealed at 140 ° C in a drying cabinet.
- the light transmission was measured according to DIN 5033 and DIN 4646 using a spectrophotometer.
- the drop in light transmission at 420 nm in the course of the heat treatment is a measure of the increasing discoloration of the test specimen.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Claims (2)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2735775 | 1977-08-09 | ||
DE19772735775 DE2735775A1 (de) | 1977-08-09 | 1977-08-09 | Verfahren zur herstellung von polycarbonaten |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0000753A1 EP0000753A1 (fr) | 1979-02-21 |
EP0000753B1 true EP0000753B1 (fr) | 1980-12-10 |
Family
ID=6015937
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP78100539A Expired EP0000753B1 (fr) | 1977-08-09 | 1978-07-28 | Procédé de préparation de polycarbonates et polycarbonates obtenus |
Country Status (7)
Country | Link |
---|---|
US (1) | US4346210A (fr) |
EP (1) | EP0000753B1 (fr) |
JP (1) | JPS6053049B2 (fr) |
BR (1) | BR7805075A (fr) |
DE (2) | DE2735775A1 (fr) |
IT (1) | IT1106867B (fr) |
SU (1) | SU1020006A3 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4233345A1 (de) * | 1992-10-05 | 1994-04-07 | Bayer Ag | Verfahren zur Herstellung von Polycarbonaten und von Polyestercarbonaten |
DE19728805A1 (de) * | 1997-07-05 | 1999-01-07 | Bayer Ag | Verfahren zur Herstellung von Polycarbonat |
DE19744693A1 (de) * | 1997-10-10 | 1999-04-15 | Bayer Ag | Verfahren zur Herstellung von speziellen Copolycarbonaten durch Schmelzumesterung |
US5973103A (en) * | 1998-10-22 | 1999-10-26 | General Electric Company | Continuous interfacial method for preparing aromatic polycarbonates |
Family Cites Families (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3014891A (en) | 1961-12-26 | Resinous compositions | ||
DE1007996B (de) | 1955-03-26 | 1957-05-09 | Bayer Ag | Verfahren zur Herstellung thermoplastischer Kunststoffe |
DE959497C (de) | 1955-03-27 | 1957-03-07 | Bayer Ag | Verfahren zur Herstellung thermoplastischer Kunststoffe |
US3275601A (en) * | 1956-01-04 | 1966-09-27 | Bayer Ag | Manufacture of polycarbonates using tertiary amines, quaternary amines and salts thereof as catalysts |
DE1046311B (de) | 1956-04-06 | 1958-12-11 | Bayer Ag | Verfahren zur Herstellung von Polycarbonaten |
US2991273A (en) | 1956-07-07 | 1961-07-04 | Bayer Ag | Process for manufacture of vacuum moulded parts of high molecular weight thermoplastic polycarbonates |
US3148172A (en) | 1956-07-19 | 1964-09-08 | Gen Electric | Polycarbonates of dihydroxyaryl ethers |
US2999846A (en) | 1956-11-30 | 1961-09-12 | Schnell Hermann | High molecular weight thermoplastic aromatic sulfoxy polycarbonates |
US3028265A (en) | 1957-05-06 | 1962-04-03 | Gen Electric | Reinforced synthetic enamel coating for electrical conductor |
US2999835A (en) | 1959-01-02 | 1961-09-12 | Gen Electric | Resinous mixture comprising organo-polysiloxane and polymer of a carbonate of a dihydric phenol, and products containing same |
US3220975A (en) * | 1959-03-19 | 1965-11-30 | Eastman Kodak Co | Tri-isoamylamine catalyst in a process for preparing a polycarbonate |
NL126830C (fr) | 1959-06-27 | |||
US3271368A (en) | 1963-05-02 | 1966-09-06 | Borg Warner | Sulfonate-thiocarbonate copolymers |
DE1300274B (de) | 1963-05-22 | 1969-07-31 | Hoechst Ag | Verfahren zur Herstellung hochmolekularer Polymerisate auf der Basis von Di-[beta-trihalogen-alpha-hydroxyaethoxy]-alkanen |
US3280078A (en) | 1963-09-26 | 1966-10-18 | Union Carbide Corp | Polyethylenically unsaturated polycarbonate polymers |
US3527734A (en) | 1965-06-07 | 1970-09-08 | Union Carbide Corp | Preparation of cylobutanediol polycarbonates by direct phosgenation |
US3428600A (en) * | 1965-06-18 | 1969-02-18 | Union Carbide Corp | Carbonate polymer synthesis |
US3674740A (en) | 1969-04-22 | 1972-07-04 | Bayer Ag | Process of producing polycarbonate |
DE2063052A1 (de) | 1970-12-22 | 1972-07-13 | Bayer | Verseifungsbeständige Polycarbonate |
DE2063050C3 (de) | 1970-12-22 | 1983-12-15 | Bayer Ag, 5090 Leverkusen | Verseifungsbeständige Polycarbonate, Verfahren zu deren Herstellung und deren Verwendung |
CH554908A (de) * | 1971-01-15 | 1974-10-15 | Basf Ag | Verfahren zur kontinuierlichen herstellung hochmolekularer, linearer polycarbonate. |
DE2140207C3 (de) * | 1971-08-11 | 1975-11-27 | Farbenfabriken Bayer Ag, 5090 Leverkusen | Stabilisiertes aromatisches PoIycarbonat |
US4073769A (en) * | 1971-08-11 | 1978-02-14 | Bayer Aktiengesellschaft | Esters of phosphorous acid |
DE2211956A1 (de) | 1972-03-11 | 1973-10-25 | Bayer Ag | Verfahren zur herstellung verseifungsstabiler blockcopolycarbonate |
DE2211957C2 (de) | 1972-03-11 | 1982-07-01 | Bayer Ag, 5090 Leverkusen | Hochmolekulare statistische Copolycarbonate |
DE2305144C2 (de) * | 1973-02-02 | 1982-05-06 | Basf Ag, 6700 Ludwigshafen | Verfahren zur kontinuierlichen Herstellung von Polycarbonaten |
DE2410716B2 (de) * | 1974-03-06 | 1977-02-10 | Bayer Ag, 5090 Leverkusen | Verfahren zur herstellung aromatischer polycarbonate nach der methode der phasengrenzflaechenkondensation |
DE2447349A1 (de) | 1974-10-04 | 1976-04-15 | Bayer Ag | Verfahren zur herstellung von aliphatischen polycarbonaten und aliphatischaromatischen copolycarbonaten |
US4025489A (en) * | 1975-01-27 | 1977-05-24 | Mobay Chemical Corporation | Utilization of bisphenol-A from the alkaline phase generated in the production of polycarbonates |
DE2510463C2 (de) | 1975-03-11 | 1986-04-03 | Bayer Ag, 5090 Leverkusen | Stabilisatormischungen und Verwendung von Stabilisatormischungen zur Stabilisierung von Polycarbonaten |
-
1977
- 1977-08-09 DE DE19772735775 patent/DE2735775A1/de not_active Withdrawn
-
1978
- 1978-07-28 DE DE7878100539T patent/DE2860295D1/de not_active Expired
- 1978-07-28 EP EP78100539A patent/EP0000753B1/fr not_active Expired
- 1978-08-07 IT IT50631/78A patent/IT1106867B/it active
- 1978-08-08 JP JP53095894A patent/JPS6053049B2/ja not_active Expired
- 1978-08-08 SU SU782645703A patent/SU1020006A3/ru active
- 1978-08-08 BR BR7805075A patent/BR7805075A/pt unknown
-
1979
- 1979-10-26 US US06/088,694 patent/US4346210A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE2860295D1 (en) | 1981-02-19 |
JPS6053049B2 (ja) | 1985-11-22 |
DE2735775A1 (de) | 1979-02-22 |
BR7805075A (pt) | 1979-04-10 |
IT1106867B (it) | 1985-11-18 |
IT7850631A0 (it) | 1978-08-07 |
US4346210A (en) | 1982-08-24 |
JPS5430293A (en) | 1979-03-06 |
EP0000753A1 (fr) | 1979-02-21 |
SU1020006A3 (ru) | 1983-05-23 |
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