EP1313791A1 - Verfahren zur herstellung von polycarbonat und produkten daraus - Google Patents
Verfahren zur herstellung von polycarbonat und produkten darausInfo
- Publication number
- EP1313791A1 EP1313791A1 EP01967254A EP01967254A EP1313791A1 EP 1313791 A1 EP1313791 A1 EP 1313791A1 EP 01967254 A EP01967254 A EP 01967254A EP 01967254 A EP01967254 A EP 01967254A EP 1313791 A1 EP1313791 A1 EP 1313791A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polycarbonate
- products
- production
- phase
- washing liquid
- 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.)
- Withdrawn
Links
- 239000004417 polycarbonate Substances 0.000 title claims abstract description 47
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 45
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 claims description 28
- 238000007872 degassing Methods 0.000 claims 1
- 239000000047 product Substances 0.000 description 21
- 239000007788 liquid Substances 0.000 description 12
- 239000000155 melt Substances 0.000 description 11
- 238000005406 washing Methods 0.000 description 10
- 239000000243 solution Substances 0.000 description 9
- 229930185605 Bisphenol Natural products 0.000 description 8
- -1 alkali metal salts Chemical class 0.000 description 7
- 239000002904 solvent Substances 0.000 description 7
- VPWNQTHUCYMVMZ-UHFFFAOYSA-N 4,4'-sulfonyldiphenol Chemical class C1=CC(O)=CC=C1S(=O)(=O)C1=CC=C(O)C=C1 VPWNQTHUCYMVMZ-UHFFFAOYSA-N 0.000 description 6
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- 239000012071 phase Substances 0.000 description 6
- 125000003118 aryl group Chemical group 0.000 description 5
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 230000003287 optical effect Effects 0.000 description 5
- 239000012074 organic phase Substances 0.000 description 5
- 229920000642 polymer Polymers 0.000 description 5
- 150000004649 carbonic acid derivatives Chemical class 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 238000013500 data storage Methods 0.000 description 4
- 239000008187 granular material Substances 0.000 description 4
- 238000005809 transesterification reaction Methods 0.000 description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- YGYAWVDWMABLBF-UHFFFAOYSA-N Phosgene Chemical compound ClC(Cl)=O YGYAWVDWMABLBF-UHFFFAOYSA-N 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000005501 phase interface Effects 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- XKZQKPRCPNGNFR-UHFFFAOYSA-N 2-(3-hydroxyphenyl)phenol Chemical compound OC1=CC=CC(C=2C(=CC=CC=2)O)=C1 XKZQKPRCPNGNFR-UHFFFAOYSA-N 0.000 description 2
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- MVPPADPHJFYWMZ-UHFFFAOYSA-N chlorobenzene Chemical compound ClC1=CC=CC=C1 MVPPADPHJFYWMZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- YIYBRXKMQFDHSM-UHFFFAOYSA-N 2,2'-Dihydroxybenzophenone Chemical class OC1=CC=CC=C1C(=O)C1=CC=CC=C1O YIYBRXKMQFDHSM-UHFFFAOYSA-N 0.000 description 1
- VXHYVVAUHMGCEX-UHFFFAOYSA-N 2-(2-hydroxyphenoxy)phenol Chemical class OC1=CC=CC=C1OC1=CC=CC=C1O VXHYVVAUHMGCEX-UHFFFAOYSA-N 0.000 description 1
- QUWAJPZDCZDTJS-UHFFFAOYSA-N 2-(2-hydroxyphenyl)sulfonylphenol Chemical class OC1=CC=CC=C1S(=O)(=O)C1=CC=CC=C1O QUWAJPZDCZDTJS-UHFFFAOYSA-N 0.000 description 1
- CJWNFAKWHDOUKL-UHFFFAOYSA-N 2-(2-phenylpropan-2-yl)phenol Chemical compound C=1C=CC=C(O)C=1C(C)(C)C1=CC=CC=C1 CJWNFAKWHDOUKL-UHFFFAOYSA-N 0.000 description 1
- JDSVNFHZMJGMGR-UHFFFAOYSA-N 2-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexan-1-one Chemical compound CC1(C)CC(C)CC(=O)C1C1=CC=C(O)C=C1 JDSVNFHZMJGMGR-UHFFFAOYSA-N 0.000 description 1
- KYGLCUAXJICESS-UHFFFAOYSA-N 2-[2,3-di(propan-2-yl)phenyl]phenol Chemical class CC(C)C1=CC=CC(C=2C(=CC=CC=2)O)=C1C(C)C KYGLCUAXJICESS-UHFFFAOYSA-N 0.000 description 1
- ZEKCYPANSOJWDH-UHFFFAOYSA-N 3,3-bis(4-hydroxy-3-methylphenyl)-1H-indol-2-one Chemical compound C1=C(O)C(C)=CC(C2(C3=CC=CC=C3NC2=O)C=2C=C(C)C(O)=CC=2)=C1 ZEKCYPANSOJWDH-UHFFFAOYSA-N 0.000 description 1
- NEQFBGHQPUXOFH-UHFFFAOYSA-N 4-(4-carboxyphenyl)benzoic acid Chemical compound C1=CC(C(=O)O)=CC=C1C1=CC=C(C(O)=O)C=C1 NEQFBGHQPUXOFH-UHFFFAOYSA-N 0.000 description 1
- UMPGNGRIGSEMTC-UHFFFAOYSA-N 4-[1-(4-hydroxyphenyl)-3,3,5-trimethylcyclohexyl]phenol Chemical compound C1C(C)CC(C)(C)CC1(C=1C=CC(O)=CC=1)C1=CC=C(O)C=C1 UMPGNGRIGSEMTC-UHFFFAOYSA-N 0.000 description 1
- KSYGTCNPCHQRKM-UHFFFAOYSA-N 4-[2-(4-hydroxyphenyl)propan-2-yl]phenol Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1.C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 KSYGTCNPCHQRKM-UHFFFAOYSA-N 0.000 description 1
- PVFQHGDIOXNKIC-UHFFFAOYSA-N 4-[2-[3-[2-(4-hydroxyphenyl)propan-2-yl]phenyl]propan-2-yl]phenol Chemical compound C=1C=CC(C(C)(C)C=2C=CC(O)=CC=2)=CC=1C(C)(C)C1=CC=C(O)C=C1 PVFQHGDIOXNKIC-UHFFFAOYSA-N 0.000 description 1
- QHPQWRBYOIRBIT-UHFFFAOYSA-N 4-tert-butylphenol Chemical compound CC(C)(C)C1=CC=C(O)C=C1 QHPQWRBYOIRBIT-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- HTLZVHNRZJPSMI-UHFFFAOYSA-N N-ethylpiperidine Chemical compound CCN1CCCCC1 HTLZVHNRZJPSMI-UHFFFAOYSA-N 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 1
- 239000012965 benzophenone Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229940106691 bisphenol a Drugs 0.000 description 1
- 239000006085 branching agent Substances 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 125000005587 carbonate group Chemical group 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- ROORDVPLFPIABK-UHFFFAOYSA-N diphenyl carbonate Chemical compound C=1C=CC=CC=1OC(=O)OC1=CC=CC=C1 ROORDVPLFPIABK-UHFFFAOYSA-N 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 125000004464 hydroxyphenyl group Chemical group 0.000 description 1
- 150000007529 inorganic bases Chemical class 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229940127554 medical product Drugs 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005191 phase separation Methods 0.000 description 1
- 150000004714 phosphonium salts Chemical class 0.000 description 1
- XNGIFLGASWRNHJ-UHFFFAOYSA-N phthalic acid Chemical compound OC(=O)C1=CC=CC=C1C(O)=O XNGIFLGASWRNHJ-UHFFFAOYSA-N 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 150000003512 tertiary amines Chemical class 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- IMFACGCPASFAPR-UHFFFAOYSA-N tributylamine Chemical compound CCCCN(CCCC)CCCC IMFACGCPASFAPR-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/06—Conditioning or physical treatment of the material to be shaped by drying
-
- 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
- C08G64/40—Post-polymerisation treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
-
- 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
- C08G64/40—Post-polymerisation treatment
- C08G64/406—Purifying; Drying
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2069/00—Use of PC, i.e. polycarbonates or derivatives thereof, as moulding material
Definitions
- the invention relates to an improved process for the production of products made of polycarbonate and the products themselves.
- phase interface dihydroxydiarylalkanes implemented in the form of their alkali metal salts with phosgene in heterogeneous phase in the presence of inorganic bases such as sodium hydroxide and an organic solvent in which the product polycarbonate is readily soluble.
- inorganic bases such as sodium hydroxide and an organic solvent in which the product polycarbonate is readily soluble.
- the aqueous phase distributed in the organic phase and after the reaction, the organic polycarbonate-containing phase is washed with an aqueous liquid, among other things, electrolytes are to be removed, and the washing liquid is then separated off.
- the solvent is removed and finally the polycarbonate in granulate form for later processing on products such as magneto-optical objects, in particular laser-readable data storage devices, lenses for the automotive industry, optical lenses, polycarbonate plates, foils etc. are provided.
- the granulate must then be melted again and the melt depending on the desired product, e.g. can be further processed in injection molding or extrusion technology.
- polycarbonate which has been produced by the melt transesterification process in which bisphenols are reacted with diaryl carbonates in the melt with the release of hydroxyarylene, is first processed into granules, which are then processed further, e.g. after the injection molding or extrusion process must be melted again.
- the object of the invention is to achieve quality improvements in polycarbonate products by means of an improved manufacturing process.
- the object is achieved in that the polycarbonate melt is used directly in production, without prior granulation, whereby, of course, usual cleaning steps, such as, for example, filtrations, can be interposed before processing.
- the reduced thermal load on the material leads to an improved quality of the products.
- the saving of an additional processing step also solves the task of making a simpler and accordingly more efficient process for the production of polycarbonate products available.
- the invention initially relates to a process for the production of polycarbonate products, in which one obtained by the phase interface process
- the polycarbonate solution is washed with an aqueous washing liquid, the washing liquid is separated off and the solvent is evaporated off, and the mixture of organic polycarbonate solution and the remaining washing liquid obtained after the washing liquid has been separated is heated by indirect heat exchange until a clear solution has been reached and for separating Solids is filtered, and then
- the solution with a polymer content of 5 to 20% by weight in a combination of a tube bundle heat exchanger and a thin-film evaporator or a snake tube evaporator or in a tube bundle heat exchanger, each with a downstream separator at a temperature of 150 is concentrated to 60 to 75% by weight to 250 ° C., the pressure in the separator being approximately 0.1 to 0.4 MPa, preferably ambient pressure (ie approximately 0.1 MPa),
- the solution is concentrated in a tube bundle heat exchanger with a downstream separator at a temperature of 250 to 350 ° C. from 60 to 75% by weight to at least 95% by weight, in particular to 98 to 99.9% by weight, the shell and tube heat exchanger being vertical, heated straight tubes with or without built-in static mixer with a has an inner diameter of 5 to 30 mm, preferably 5 to 15 mm, a length of 0.5 to 4 m, preferably 1 to 2 m, and the throughput per heat exchanger tube through the tubes is 0.5 to 10 kg / h, preferably 3 to 7 kg / h, based on the polymer and the pressure in the separator being 0.5 kPa to 0.1 MPa, in particular 3 kPa to 0.1 kPa, preferably 3 kPa to
- the throughput per heat exchanger tube through the tubes is 0.5 to 10 kg / h, preferably 3 to 7 kg / h, based on the polymer and wherein the pressure in the separator is 0.05 kPa to 0.1 MPa, preferably 0.1 kPa to 2 kPa,
- Temperatures advantageous because these are significantly lower than the temperatures that usually occur in the final evaporation in this step by means of extruders, which results in a lower thermal load on the product and thus also in a higher product quality.
- the saving of the otherwise usual re-melting of the granules leads to the simplification also to a lower thermal load on the product and thus to an improvement in product quality.
- polycarbonate melts obtained from the melt transesterification process, optionally cooled to a suitable temperature, can be processed directly.
- polycarbonate melts obtained from the melt transesterification process optionally cooled to a suitable temperature, can be directly processed further.
- step C the temperatures maintained there must be made possible by using special evaporator devices.
- an evaporator e.g. B. for the production of polycarbonate sheets.
- polycarbonate should include both homopolycarbonates and copolycarbonates and mixtures thereof.
- the polycarbonates according to the invention can be aromatic polyester carbonates or polycarbonates which are present in a mixture with aromatic polyester carbonates.
- the term polycarbonate is then used to represent the aforementioned polymers.
- the polycarbonate according to the invention is obtained by the so-called phase boundary process (H. Schnell “Chemistry and Physics of Polycarbonates", Polymer Review, Vol.IXS. 22ff, Interscience Publishers, New York 1964), in which the solution containing polycarbonate is then washed with a washing liquid , the washing liquid is separated off and the solvent is evaporated off.
- the polycarbonate can also be obtained by the so-called melt transesterification process (DG LeGrand et al., "Jlandbook of Polycarbonate Science and Technology", Marcel Dekker Verlag New York, Basel, 2000, p. 12ff.).
- melts obtained at the end of the respective manufacturing process are then not granulated, but processed directly for the end products.
- Compounds to be used preferably as starting compounds according to the invention are bisphenols of the general formula HO-Z-OH, in which Z is a divalent organic radical having 6 to 30 carbon atoms and one or more aromatic
- Examples of such compounds are bisphenols which belong to the group of the dihydroxydiphenyls, bis (hydroxyphenyl) alkanes, inganbisphenols, bis (hydroxyphenyl) ethers, bis (hydroxyphenyl) sulfones, bis (hydroxyphenyl) ketones and, ⁇ '-bis (hydroxyphenyl) diisopropylbenzenes belong.
- Particularly preferred bisphenols which belong to the abovementioned connecting groups are 2,2-bis (4-hydroxyphenyl) propane (bisphenol-A), tetraalkylbisphenol-A, 4,4- (meta-phenylenediisopropyl) diphenol (bisphenol M), 1,1-bis (4-hydroxyphenyl) - 3,3,5-trimethylcyclohexanone and, if appropriate, their mixtures.
- Particularly preferred copolycarbonates are those based on the monomers bisphenol-A and 1,1-bis (4-hydroxyphenyl) -3,3,5-trimethylcyclohexane.
- the bisphenol compounds to be used according to the invention are reacted with carbonic acid compounds, in particular phosgene and diphenyl carbonate.
- the polyester carbonates according to the invention are obtained by reacting the bisphenols already mentioned, at least one aromatic dicarboxylic acid and optionally carbonic acid.
- aromatic dicarboxylic acids are, for example, orthophthalic acid, terephthalic acid, isophthalic acid, 3,3'- or 4,4'-diphenyldicarboxylic acid and benzophenone dicarboxylic acids.
- Inert organic solvents used in the process are preferably dichloromethane or mixtures of dichloromethane and chlorobenzene.
- the reaction can be accelerated by catalysts such as tertiary amines, N-alkylpiperidines or onium salts.
- Tributylamine, triemylarnine and N-ethylpiperidine are preferably used.
- a monofunctional phenol such as phenol, cumylphenol, p-tert-butylphenol or 4- (l, l, 3,3-tetramethylbutyl) phenol, can be used as chain terminator and molecular weight regulator.
- isatin biscresol can be used as branching agent.
- the bisphenols are dissolved in an aqueous alkaline phase, preferably sodium hydroxide solution.
- the chain terminators which may be required for the production of copolycarbonates are dissolved in amounts of 1.0 to 20.0 mol% per mole of bisphenol, in the aqueous alkaline phase or added to them in bulk in an inert organic phase.
- phosgene is introduced into the mixer containing the other reaction components and the polymerization is carried out.
- Some, up to 80 mol%, preferably from 20 to 50 mol%, of the carbonate groups in the polycarbonates can be replaced by aromatic dicarboxylic acid ester groups.
- thermoplastic polycarbonates have average molecular weights M w and a foreign particle index of less than
- the sodium content is preferably less than 30 ppb, measured by atomic absorption spectroscopy.
- the aqueous phase is emulsified in the organic phase. This creates droplets of different sizes.
- the organic phase containing the polycarbonate usually several times with a washed aqueous liquid and separated from the aqueous phase as far as possible after each wash.
- Diluted Müierals ⁇ ure such as HCl or H 3 PO and for further purification demineralized water are used as washing liquid for the separation of the catalyst.
- the concentration of HCl or H 3 PO 4 in the washing liquid can be, for example, 0.5 to 1.0% by weight.
- phase separation devices for separating the washing liquid from the organic phase.
- the solvent is evaporated off in stages A to C.
- solution PC also serve the SPC process (melt transesterification process PC).
- polycarbonate is produced in such a way that in the first stage of oligocarbonate synthesis quaternary
- Ammonium, phosphonium compounds in amounts of 10 "4 to 10 " 8 mol, based on 1 mol of bisphenol, the melting of the reactants being found at temperatures from 80 ° C. to 180 ° C., preferably at 100 ° C., in the first stage to 150 ° C under atmospheric pressure for up to 5 hours, preferably from 0.25 to
- the SPC process is carried out without a solvent. Therefore, in contrast to the LPC process, no tube / strand evaporator or extruder is required.
- the polycarbonate melts thus obtained from the various processes are then directly processed without an intermediate step, e.g. Granulation and remelting, further processed to the desired products, whereby, of course, usual cleaning steps, such as e.g. Filtration can be interposed.
- an intermediate step e.g. Granulation and remelting
- These products can e.g. be produced by the injection molding, extrusion or casting process (film).
- films include, but are not limited to, polycarbonate sheets such as for glazing greenhouses with double-wall sheets or twin-wall sheets, solid sheets, magneto-optical data storage / mini disk, compact disk, DVD, optical lenses and prisms, light guides, glazing for motor vehicles, headlights, foils , medical devices, packaging (eg for food and medical products etc.), housings for electrical and electronic articles (eg computer housings, mobile phone parts etc.), glasses and frames, household items (such as electrical articles, eg irons etc.), toys etc. to understand.
- polycarbonate sheets such as for glazing greenhouses with double-wall sheets or twin-wall sheets, solid sheets, magneto-optical data storage / mini disk, compact disk, DVD, optical lenses and prisms, light guides, glazing for motor vehicles, headlights, foils , medical devices, packaging (eg for food and medical products etc.), housings for electrical and electronic articles (eg computer housings
- the method according to the invention is particularly suitable for the production of products which have to meet high demands on the optical quality, ie transparency and colorlessness, for example glazing of greenhouses and motor vehicles, headlights, magneto-optical data storage / mini disk, compact disk, DVD, optical lenses and prisms, light guides, glasses etc.
- the method according to the invention is very particularly suitable for producing glazing for greenhouses and motor vehicles and headlights.
- Another very particularly suitable application is the production of magneto-optical data storage devices / mini disks, compact disks and DVDs.
- Another very particularly suitable application is the production of optical lenses and prisms, light guides and spectacle lenses.
- the preferred molecular weight range for the media is 12,000 to
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Polyesters Or Polycarbonates (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10052873A DE10052873A1 (de) | 2000-08-23 | 2000-08-23 | Verfahren zur Herstellung von Polycarbonat und Produkten daraus |
DE10052873 | 2000-08-23 | ||
PCT/EP2001/009245 WO2002016470A1 (de) | 2000-08-23 | 2001-08-10 | Verfahren zur herstellung von polycarbonat und produkten daraus |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1313791A1 true EP1313791A1 (de) | 2003-05-28 |
Family
ID=7661010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01967254A Withdrawn EP1313791A1 (de) | 2000-08-23 | 2001-08-10 | Verfahren zur herstellung von polycarbonat und produkten daraus |
Country Status (10)
Country | Link |
---|---|
US (1) | US20020074683A1 (pt) |
EP (1) | EP1313791A1 (pt) |
JP (1) | JP2004512390A (pt) |
KR (1) | KR100725203B1 (pt) |
CN (1) | CN100338114C (pt) |
AU (1) | AU2001287671A1 (pt) |
BR (1) | BR0113405A (pt) |
DE (1) | DE10052873A1 (pt) |
TW (1) | TW591052B (pt) |
WO (1) | WO2002016470A1 (pt) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ATE516316T1 (de) | 2008-02-13 | 2011-07-15 | Bayer Materialscience Ag | Verfahren zur herstellung von polycarbonaten |
EP3502160A1 (de) * | 2017-12-20 | 2019-06-26 | Covestro Deutschland AG | Verfahren zur herstellung von polycarbonat |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59166506A (ja) * | 1983-03-14 | 1984-09-19 | Mitsui Toatsu Chem Inc | 重合液組成物の連続的脱揮発方法 |
DE3930673A1 (de) * | 1989-09-14 | 1991-03-28 | Bayer Ag | Stabilisierte polycarbonate |
DE4100201A1 (de) * | 1991-01-05 | 1992-07-09 | Bayer Ag | Verfahren zum verschaeumen von thermoplastischen polycarbonaten |
DE4446266C1 (de) * | 1994-12-23 | 1996-08-14 | Krupp Vdm Gmbh | Nickellegierung |
US5777064A (en) * | 1995-03-22 | 1998-07-07 | Mitsubishi Gas Chemical Company, Inc. | Production method of polycarbonate |
US5762851A (en) * | 1996-01-16 | 1998-06-09 | Asahi Kasei Kogyo Kabushiki Kaisha | Method of producing polycarbonate pellets |
MY119540A (en) * | 1998-04-24 | 2005-06-30 | Ciba Spacialty Chemicals Holding Inc | Increasing the molecular weight of polyesters |
DE19835744A1 (de) * | 1998-08-07 | 2000-02-17 | Bayer Ag | Verfahren zum Eindampfen von Polymerlösungen thermoplastischer Polymere |
US6420512B1 (en) * | 2001-07-24 | 2002-07-16 | General Electric Company | Extrusion method for making polycarbonate |
-
2000
- 2000-08-23 DE DE10052873A patent/DE10052873A1/de not_active Withdrawn
-
2001
- 2001-08-10 EP EP01967254A patent/EP1313791A1/de not_active Withdrawn
- 2001-08-10 AU AU2001287671A patent/AU2001287671A1/en not_active Abandoned
- 2001-08-10 CN CNB018144497A patent/CN100338114C/zh not_active Expired - Fee Related
- 2001-08-10 WO PCT/EP2001/009245 patent/WO2002016470A1/de active Application Filing
- 2001-08-10 BR BR0113405-1A patent/BR0113405A/pt not_active IP Right Cessation
- 2001-08-10 JP JP2002521563A patent/JP2004512390A/ja not_active Withdrawn
- 2001-08-20 TW TW090120328A patent/TW591052B/zh not_active IP Right Cessation
- 2001-08-20 US US09/933,360 patent/US20020074683A1/en not_active Abandoned
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2003
- 2003-02-22 KR KR1020037002623A patent/KR100725203B1/ko not_active IP Right Cessation
Non-Patent Citations (1)
Title |
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See references of WO0216470A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10052873A1 (de) | 2002-03-07 |
CN1447829A (zh) | 2003-10-08 |
TW591052B (en) | 2004-06-11 |
US20020074683A1 (en) | 2002-06-20 |
KR100725203B1 (ko) | 2007-06-07 |
JP2004512390A (ja) | 2004-04-22 |
AU2001287671A1 (en) | 2002-03-04 |
BR0113405A (pt) | 2003-07-08 |
CN100338114C (zh) | 2007-09-19 |
WO2002016470A1 (de) | 2002-02-28 |
KR20030029841A (ko) | 2003-04-16 |
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