WO1997049752A1 - Procedes de production de polycarbonate - Google Patents
Procedes de production de polycarbonate Download PDFInfo
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- WO1997049752A1 WO1997049752A1 PCT/JP1997/002107 JP9702107W WO9749752A1 WO 1997049752 A1 WO1997049752 A1 WO 1997049752A1 JP 9702107 W JP9702107 W JP 9702107W WO 9749752 A1 WO9749752 A1 WO 9749752A1
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- polycarbonate
- prepolymer
- group
- producing
- solid state
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- 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
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- 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
- C08G64/30—General preparatory processes using carbonates
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- 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
- C08G64/04—Aromatic polycarbonates
- C08G64/06—Aromatic polycarbonates not containing aliphatic unsaturation
- C08G64/08—Aromatic polycarbonates not containing aliphatic unsaturation containing atoms other than carbon, hydrogen or oxygen
Definitions
- the present invention relates to a method for producing polycarbonate. More specifically, when a polycarbonate is produced by a transesterification reaction, for example, a transesterification reaction using a dihydroxy compound and a carbonic acid diester, a specific polymerization catalyst is used, or a transesterification reaction is carried out. By reacting the polycarbonate prepolymer obtained by the prepolymerization by the reaction-boundary surface polycondensation method in a solid state using a specific catalyst, the polycarbonate prepolymer is further reduced in oxygen content.
- the present invention relates to a method for efficiently producing high-quality polycarbonate by polymerizing in a solid state under a concentration condition. Background art
- Polycarbonate is an engineering ring plastic with excellent transparency, heat resistance and impact resistance, and is currently widely used in the electrical, electronic, automotive, optical component and other industrial fields. Have been.
- Examples of the method for producing polycarbonate include a method of directly reacting an aromatic dihydroxy compound such as bisphenol A with phosgene (interfacial polycondensation method), or a method such as bisphenol A.
- an aromatic dihydroxy compound is transesterified with a carbonic acid diester such as difluorocarbon in a molten state or a solid state (melt polymerization method, solid state polymerization method).
- the interfacial polycondensation method The methylene chloride used in the process is mixed into the resin and the removal is very difficult, so that the obtained polycarbonate is liable to contain chlorine, and there remains a quality problem.
- the melt polymerization method has the advantage that polycarbonate can be produced at a lower cost than the interfacial polycondensation method, but it is usually long at a high temperature of 280 ° C to 310 ° C. There was a major problem that the resulting polycarbonate was inevitably colored due to the time reaction. There is also a problem that a high molecular weight polymer cannot be obtained.
- An object of the present invention is to solve the problems of such a conventional polycarbonate produced by a transesterification reaction, and to provide a method for efficiently producing a high-quality polycarbonate.
- the present inventors have conducted intensive studies to achieve the above object, and as a result, have found that when performing a transesterification reaction in a molten state, a specific catalyst is used.
- a specific catalyst is used.
- prepolymer a polycarbonate prepolymer
- the polymerization is performed in a state where the oxygen concentration in the gas phase is 2 ppm or less.
- the present invention has been completed based on such findings.
- a quaternary phosphonium salt having one or two or more groups (provided that when a quaternary phosphonium salt is used as the phosphorous-containing basic compound of (a), the quaternary phosphonium salt used as (b)
- a polycarbonate prepolymer is prepared by pre-polymerization, and then the prepolymer is fully polymerized in a solid state or a swollen solid state.
- a method for producing polycarbonate which is selected from the group consisting of (a) a phosphorus-containing basic compound and (b) an aryl group and a branched alkyl group during prepolymerization and main polymerization.
- a quaternary phosphonium salt having one or more groups (however, when a quaternary phosphonium salt is used as the phosphorus-containing basic compound of (a), the quaternary phosphonium salt used as (b) (A second aspect of the present invention) a method for producing a polycarbonate, which comprises using a catalyst consisting of a salt different from a salt). (3) After preparing a polycarbonate prepolymer by pre-polymerization, the prepolymer is solid-phased or swollen using a trivalent or pentavalent phosphorus compound or a nitrogen-containing organic basic compound as a catalyst. A method for producing a polycarbonate polymerized in a solid state (third invention),
- polycarbonate is produced by a transesterification reaction.
- a dihydroquine compound and (B) a carbonic acid diester can be preferably used, and if necessary, a terminal terminator or a branching agent is used in combination.
- phosgene can also be used as the component (B) as a raw material during the production of prepolymer.
- Examples thereof include an aromatic dihydroxy compound and an aliphatic dihydroxy compound, and at least one compound selected from these.
- R 1 and R 2 are each a halogen atom of fluorine, chlorine, bromine or iodine or an alkyl group having 1 to 20 carbon atoms, for example, a methyl group, an ethyl group, an n-pro Pill group, isopropyl group, n-butyl group, isobutyl group, sec-butyl group, t-butyl group, pentyl group, hexyl group, cyclohexyl group, heptyl group, octyl group, etc.
- R ′ and R 2 may be the same or different.
- a plurality of R ′ may be the same or different, and when there are a plurality of R 2 , a plurality of R 2 may be the same or different.
- m and n are each an integer of 0-4.
- Z is a single bond, an alkylene group having 1 to 20 carbon atoms, an alkylidene group having 2 to 20 carbon atoms, a cycloalkylene group having 5 to 25 carbon atoms, and a cycloalkylidene group having 5 to 25 carbon atoms.
- alkylene group having 1 to 20 carbon atoms and the alkylidene group having 2 to 20 carbon atoms include methylene group, ethylene group, propylene group, butylene group, pentylene group, hexylene group, and ethylidene group.
- one or more of the above compounds are appropriately selected and used as the dihydroxy compound of the component (A), and among these, aromatic dihydroxy compounds It is preferable to use the bisphenol A.
- it is at least one compound selected from diaryl carbonate compounds, dialkyl carbonate compounds or alkylaryl carbonate compounds.
- the diaryl carbonate compound used as one of the components (B) has the general formula (111)
- Ar ′ and Ar 2 each represent an aryl group, which may be the same or different.
- Ar 3 and Ar ⁇ each represent an aryl group, which may be the same or different, and D 1 is a residue obtained by removing two hydroxyl groups from the aromatic dihydroxy compound. Show.
- the dialkyl carbonate compound has the general formula (V)
- R 3 0 C 0 R 4 (V) (In the formula, R 3 and each represent an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 4 to 20 carbon atoms, which may be the same or different.)
- R 5 and R 6 each represent an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 4 to 20 carbon atoms, which may be the same or different, and D 2 is Indicates the residue obtained by removing two hydroxyl groups from an aromatic dihydroquine compound.
- the alkyl aryl carbonate compound has the general formula (VII)
- Ar 5 represents an aryl group
- R 7 represents an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 4 to 20 carbon atoms.
- a r 60 CO ⁇ D 3 -1 OCOR (VIII) (Wherein, Ar 6 is an aryl group, R 8 is an alkyl group having 1 to 20 carbon atoms or a cycloalkyl group having 4 to 20 carbon atoms, and D 3 is a group derived from the aromatic dihydroxy compound. Indicates the residue excluding two hydroxyl groups.)
- one or more of the above compounds may be appropriately selected and used, and among these, difluorocarbonate is preferably used.
- the polymerization catalyst comprises (a) a phosphorus-containing basic compound and (b) an aryl group and a branched alkyl group.
- the above catalyst is used at the time of prepolymerization and at the time of main polymerization.
- phosphorous-containing basic compounds may be used, or two or more of them may be used in combination.
- a quaternary phosphonium salt is used as the phosphorus-containing basic compound in (a)
- a phosphonium salt having an alkyl group such as a trivalent phosphorus compound or a quaternary phosphonium salt described below, is preferably used. .
- the trivalent phosphorus compound is not particularly limited, and includes various compounds.
- the trivalent phosphorus compound may be represented by the general formula (IX) or (X) RP (IX)
- R e represents a hydrogen atom or an organic group, in an organic group, for example, methylation group, Echiru group, propyl group, butyl group, pentyl group, Alkyl groups such as xyl, octyl and cyclohexyl groups; aryl groups such as cycloalkyl group, phenyl group, tolyl group, naphthyl group and biphenyl group; and aryl groups such as benzyl group. And an alkyl group.
- the three R 9 's may be the same or different, and two R 9' s may combine to form a ring structure.
- the compounds represented by the general formula () include, for example, ethyl phosphine, getyl phosphine, propyl phosphine, dipropyl phosphine, diisoa Alkyl phosphines such as minolephosphine, triethylphosphine, tri-n-propylphosphine, trisop-opening pyrphosphine, tri-n-butylphosphine, phenylphosphine, diphenyl Phenylphosphine, phenylmethylphosphine, phenyldimethylphosphine, triphenylphosphine, tri-p-trilphosphine, tri0—trilyphosphine, tris Aliphatics such as (2,4-di-t-butylphenyl) phosphine and tris (p-methoxyphenyl) phosphine Ru
- Examples of the compound represented by the general formula (X) include, for example, dimethylphosphite, trimethylphosphite, getylphosphite, and trimethylphosphite.
- Phosphites such as, tris (2,4-g-t-butylphenyl) phosphite, tris (nonylphenyl) phosphite, tris (hydroxyphenyl) phosphite Esters, diphenyloctylphosphite, diphenyldecylphosphite, phenyldidecylphosphite, 4,4'-butylidene-bis (3-methyl-6-t-butyldiphenyl) (Tri-tridecyl) phosphite, 1,1,3—tris (2—methyl 4-ditridecylphosphite 1—5—t-butylphenyl) butane, 4,4'-a Examples include aryl phosphite alkyl esters such as isopropylidene diphenol alkyl phosphite.
- the quaternary phosphonium salt is not particularly limited and includes various salts.
- the quaternary phosphonium salt may be represented by the general formula (XI) or (XII)
- R ′ Represents an organic group.
- the organic group include a methyl group, an ethyl group, a propyl group, and a butyl group.
- an arylalkyl group such as a benzyl group.
- the four R '°' s may be the same or different, or two R's may combine to form a ring structure.
- R represents a hydrocarbon group such as an alkyl group and a aryl group, and two R, 0 may be the same or different.
- R ′′ represents a hydrogen atom or a hydrocarbon group such as an alkyl group or a aryl group, and four R ′′ s may be the same or different.
- Y 1 is a divalent group such as CO 3 Indicates a group capable of forming anion.
- Such quaternary phosphonium salts include, for example, tetrafluorophosphonium hydroxide, tetranaphthylphosphonium hydroxide, tetra (phenyl) phosphonium hydrochloride, tetra (biphenyl) Tetra (aryl or alkyl) phosphonimides, such as phosphonium hydroxide, tetratolyl phosphonium hydroxide, tetramethylphosphonium hydroxide, tetrathyl phosphonium hydroxide, tetrabutyl phosphonium hydroxide, etc.
- Droxides furthermore, tetramethylphosphonium tetrabutyl, tetraethyl phosphonidium tetraphenyl borate, tetrabutyl phosphonidium tetraphenyl borate, and tetraphosphonyl nitrogen borate
- Mi de te tiger phenyl phosphonyl ⁇ Muhu error Roh error door, Te trough Weniruhosu Honiumute tiger phenyl volley door, main Tilt re-phenylalanine phosphonyl ⁇ -time tape trough Wenirubore one door, hexyl Bok re-phenylalanine phosphonyl ⁇ -time to a consequent Russia Tetraphenyl borate, penzinoletriphenylphosphonium tetraphenylborate, biphenyl triphenylphosphonidium tetrabutyl borate, tetrahydr
- a phosphonium salt having a structure in which an atom has no branch particularly a phosphonium salt having an alkyl group having such a structure, is preferable.
- tetrabutylphosphonium tetrahydrogen borate, tetraethyl phosphonidium tetrabutyl borate, tetrabutyl phosphonidium hydroxide and the like are preferable.
- the quaternary phosphonium salt used as (b) needs to be different from that used as (a) the phosphorus-containing basic compound.
- n an integer of 1 to 4.
- R 11 at least one selected from an aryl group or a branched alkyl group
- the branched alkyl group has a structure of “R 3 C—”, wherein R is a group consisting of hydrogen, an alkyl group, an alkyl group having a substituent, an aryl group, and an aryl group having a substituent. At least one is selected, and at least two of the three Rs may combine to form a ring structure. However, this excludes the case where two are hydrogen at the same time. Examples thereof include a branched alkyl group such as a cycloalkyl group, an isopropyl group, and a tert-butyl group, and an aryl group such as a phenyl group.
- R 12 is an alkyl group, an alkyl group having a substituent, an aryl group, or an aryl group having a substituent.
- a monovalent anion such as a halogen atom, a hydroxyl group, an alkyloxy group, an aryloxy group, R'C00, HC0, (R, 0) P (-0) 0 or BR '', can be formed.
- R represents a hydrocarbon group such as an alkyl group or a aryl group, and two R'0s are different even if they are the same. Is also good.
- R ′′ ′ represents a hydrogen atom or a hydrocarbon group such as an alkyl group or a aryl group, and the four R ′ ′′ s may be the same or different.
- Y ' represents a group capable of forming a divalent anion such as C03.
- Such quaternary phosphonium salts include, for example, tetraphenylphosphonium hydroxide, tetranaphthylphosphonium hydroxide, tetra (clophenyl) phosphoniumhydroquinide, and tetra (biphenyl) phosphonium hydroxide.
- Tetra (aryl or alkyl) phosphonimoxides such as droxide, tetralinolephosphonium hydroxide, tetracyclohexylphosphonium hydroxide, and the like;
- Monomers such as phenyl trimethyl phosphonium hydroxide, biphenyl trimethyl phosphonium hydroxide, phenyl trihexyl phosphonium hydroxide, and biphenyl trihexyl phosphonium hydroxide.
- (Aryl) Trialkyl phosphonimides, dimethyl diphenyl phosphonimoxides, dimethyl diphenyl phosphonimoxides, di (biphenyl) diphenyl phosphonimides, etc.
- Rudialkyl phosphonimide hydroxides
- tetraphenylphosphonium tetrabutyl borate tetranaphthyl phosphonidium tetrabutyl borate, tetra (clo-cloth phenyl) phosphonimuth triphenyl borate, tetra (biphenyl) phosphonimulet triphenyl borate ,
- tetraarylphosphonium tetrabutyl volatile tetrabutyl phosphonium tetrabutyl borate, and the like.
- Methyl triphenylphosphonium ester triborate ethyl triphenylphosphonidium tetraphenyl borate, built-in triphenyl phosphonidium tetraphenyl borate, butyl triphenylphosphonimate tetraphenyl borate, Octyl triphenylphosphonium ester triborate, tetradecyl triphenyl phosphonimate triphenyl borate, cyclohexynoletriphenyl phosphonimine tributyrate borate, cyclopentyl triphenyl phosphonype nitrate triphenyl borate Triphenylphosphonium ester triborate, ethoxybenzyl triphenylphosphonium ester triborate, methoxymethyl triflate Ruhosuhoniumute Triphenyl borate, acetoximetril triphenylphosphonium tetrabutyl borate, phenacyl trip
- dialkyldialkylphosphoniumtetraphenylborate such as dimethyldiphenylphosphoniumtetraphenylborate, methyldiphenylphosphonidiumtetraphenylborate, di (biphenyl) diphenylphosphonidiumtetraphenylborate, and the like.
- an aryloxy group such as phenoxide, an alkyloxy group such as methoxide and ethoxide, and an acetate.
- Alkenylcarbonyl groups such as benzoate, arylcarbonyl groups such as benzoate, and halogen atoms such as chloride and bromide.
- Grade phosphonium salts such as dimethyldiphenylphosphoniumtetraphenylborate, methyldiphenylphosphonidiumtetraphenylborate, di (biphenyl) diphenylphosphonidiumtetraphenylborate, and the like.
- anion instead of the
- a compound having a divalent anion represented by the general formula (XIV) for example, bis (tetrafluorophenylphosphonium) carbonate , Quaternary phosphonium salts such as bis (biphenyltriphenylphosphonium) carbonate, and, for example, 2,2-bis (4-hydroxyphenyl) prono.
- Bis-tetrafluorophosphonium salt of ethylene, ethylenebis (triphenylphosphonium) dibromide, trimethylenebis (triphenylphosphonium) -bis (tetrafylethanolate), etc. be able to.
- R 13 represents an organic group, which may be the same or different
- X 3 represents a halogen atom, a hydroxyl group, an alkyloxy group, an aryloxy group, an alkylcarbonyloxy group, an arylcarbonyl.
- Okishi group, HC 0 3 or BR 4 R is a hydrogen atom or a hydrocarbon group, four R each other may be the same or different
- P h denotes the full et two group
- Y 2 represents a C 0 3
- n is an integer of 1-4.
- quaternary phosphonium compound examples include, for example, biphenyl triphenyl phosphonium hydroxide, methoxyphenyl triphenyl phosphonium hydroxide, and phenoxyphenyl trifly.
- quaternary phosphonium salts containing a branched alkyl group include isoprovir trimethylphosphonium, isopropyl triethylphosphonium, isopropyl tributylphosphonium, and isoprovir triethylphosphonium.
- salt comprising a quaternary phosphonium (cation) containing a branched alkyl group and X or ⁇ (anion)
- X or ⁇ anion
- quaternary phosphonium salts containing a branched alkyl group cyclohexane triphenyl phosphonimidyl tetraborate and cyclopentyl triphenyl phosphonidium nitrate borate are particularly effective in obtaining a catalytic effect. It is preferably used because of its excellent balance with the quality of polycarbonate.
- these phosphorus-containing basic compounds and quaternary phosphonium salts have a minimum content of metal impurities, and in particular, the content of alkali metals and alkaline earth metal compounds is 50 ppm or less. Are preferred.
- the above-mentioned phosphorus-containing basic compound of the component (a) is used as the polymerization catalyst in an amount of 10 to 10 mol per mol of the dihydroxy compound of the component (A) as a raw material.
- ' ⁇ 1 0 - 8 mol, preferred and rather 1 0 - 2 to 1 0 - 7 molar, are properly favored La 1 0 3 - 1 0 - 6 mol used,
- the total amount of the component ( a ) and the component (b) is usually 10 to 10— B mole, relative to 1 mole of the dihydroxy compound of the component (A), which is a raw material.
- the preferred and rather 1 0 - 2 to 1 0 _ 7 mol, properly favored by al 1 0 - is added 3-in proportions such that 1 0 6 mol. If the amount of the catalyst is less than 10 to 8 mol, the catalytic effect may not be exhibited. If the amount exceeds 10 moles, the physical properties of the final product, polycarbonate, in particular, heat resistance and hydrolysis resistance may be reduced, and the cost may increase. There is no need to add it.
- a nitrogen-containing organic basic compound described later as the polymerization catalyst of the present invention as a catalyst used in the prepolymerization.
- Catalytic amount of the preliminary polymerization a raw material (A) with respect dihydric Dorokishi 1 mole of the compound of component, properly like the nitrogen-containing organic basic compound is 1 0 - 2 to 1 0 one 8 mol, preferred Ri yo Preferably, it is used in an amount of 10 to 10 to 7 mol. If the amount of the nitrogen-containing organic basic compound used is less than 10 to 8 mol, the catalyst in the early stage of the reaction may be insufficient, and if it exceeds 10 to 2 mol, it may lead to cost up. Not good.
- the blepolymer is converted into a solid state or a pentavalent or pentavalent phosphorus compound or a nitrogen-containing organic basic compound as a polymerization catalyst. Polymerize in the swollen solid state.
- the trivalent phosphorus compound is not particularly limited, and for example, a compound represented by the general formula (IX) or (X) is used. Specific examples of such a trivalent phosphorus compound include the compounds described above.
- the pentavalent phosphorus compound is not particularly limited, and may be, for example, a compound represented by the general formula (XVII) or (XVIII)
- R R)' 4 represents a hydrogen atom or an organic group, in an organic group, for example, methylation group, Echiru group Alkyl groups such as, propyl, butyl, pentyl, hexyl, octyl, and cyclohexyl; cycloalkyl, phenyl, tolyl, naphthyl, and biphenyl; Examples thereof include arylalkyl groups such as a reel group and a benzyl group.
- Three R '4 is rather good be the same or different to each other and two R' may form a ring structure by bonding 4.
- compounds represented by the general formula (XVII) include, for example, triethyl phosphate, tri-n-propyl phosphate , Triisopropyl phosphite, tri-n-butyl phosphate, triphenyl phosphite, tri-p-trinolephosphite, tri-o-trinole phosphate
- the phosphoric acid ester such as triethylphosphine oxide, tri-n-propylphosphine oxide, triethylphosphine oxide and the compound represented by the general formula (XVI 11) Sopropyl phosphine oxide, tri-n-butyl phosphine oxide, triphenyl phosphine oxide, tri-p-trinole
- phosphinoxides such as phosphinoxide and tri-O-tolylphosphinoxide.
- Laurine acid phosphate, tridecyl acid phosphate, stearyl acid phosphate, oleyl acid phosphate, fenyl acid phosphate, triacid acid phosphate, t-butyl acid Phosphoric acid esters (alkyl or aryl acid phosphates) such as penic acid phosphate and naphthyl acid phosphate are exemplified.
- the phosphoric ester (alkyl or aryl acid phosphate) may be a monoester, a diester or a mixture thereof.
- nitrogen-containing organic basic compound there is no particular limitation on the nitrogen-containing organic basic compound, and various compounds can be used.
- Such materials include, for example, trimethylamine, triethylamine, tripropylamine, tributylamine, tripentylamine, triphenylamine, trimethylamine, trimethylamine, trimethylamine, triphenylamine, triphenylamine, trimethylamine, trimethylamine, trimethylamine, triphenylamine, triphenylamine, triphenylamine, triphenylamine, triphenylamine, triphenylamine, triphenylamine, triphenylamine.
- Aliphatic tertiary amine compounds such as tylbenzylamine, aromatic tertiary amine compounds such as triphenylamine, N, N-dimethyl-4-aminopyridine, 4- Jetylamino pyridine, 4-pyrrolidinopyridine, 4-aminopyridin, 2-aminopyridin, 2-hydroxypyridin, 4-hydroxypyridin, 2-methoxypyridin, 4 —Methoxypyridine, imidazole, 2—Methylimidazole, 4-methylimidazole, 1-dimethylimidazole, 2—Methoxyimidazole, 2—Melcaptoimi Nitrogen-containing organic basic compounds such as dazolyl, aminoquinoline, and diazabicyclooctane (DABCO).
- DABCO diazabicyclooctane
- a quaternary ammonium salt represented by (NR 15 ) + (X 4 ) (XIX) can be mentioned.
- R 15 is an organic group such as an alkyl group such as a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, an octyl group and a cyclohexyl group.
- (2) Indicate aryl groups such as cycloalkyl group, phenyl group, tolyl group, naphthyl group and biphenyl group, and aralkyl groups such as benzyl group, etc.).
- R '5 is rather good be different from each other even identical, or may form a ring structure by bonding two R 15.
- X 4 represents a halogen atom, a hydroxyl group or BR 4 .
- R in BR 4 represents a hydrogen atom or a hydrocarbon group such as an alkyl group or a aryl group, and the four Rs may be the same or different.
- quaternary ammonium salts include, for example, tetramethylammonium hydroxide, tetraethylammonium hydroxide, tetrabutylammonium hydroxide, trimethylbenzylammonium hydroxide and the like.
- a quaternary compound represented by the above general formula (XIX) because of its high catalytic activity, easy thermal decomposition, and difficulty in remaining in the polymer, etc.
- Ammonia salt specifically, tetramethylammonium hydroxide, tetraptylammonium hydroxide, Preference is given to lamethylammonium borohydride and tetrabutylammonium borohydride, and particularly preferred is tetramethylammonium hydroxide.
- Such a nitrogen-containing organic basic compound may be used alone or in a combination of two or more.
- these nitrogen-containing organic basic compounds have a content of metal impurities as small as possible, especially those having a content of 50 ppm or less of an alkali metal and an alkaline earth metal compound. It is.
- the nitrogen-containing organic basic compound is not particularly limited, and examples thereof include an aliphatic tertiary amine compound, an aromatic tertiary amine compound, and a nitrogen-containing heterocyclic compound.
- quaternary ammonium salt represented by the general formula (XIX) can be mentioned. Specific examples and preferred examples of such a quaternary ammonium salt include the compounds described above.
- Such a nitrogen-containing organic basic compound may be used alone or in a combination of two or more.
- the usage amount and the preferable usage amount of the nitrogen-containing organic basic compound in the prepolymerization are the same as in the case of the third invention.
- the prepolymer is preferably polymerized in a solid state or a swollen solid state using a quaternary phosphonium salt as a polymerization catalyst.
- the nitrogen-containing organic basic compound used in the above-mentioned preliminary polymerization may be used as a catalyst, and further, a trivalent phosphorus compound or a pentavalent phosphorus compound is used as a catalyst. May be used.
- the quaternary phosphonium salt is not particularly limited, and various salts can be used.
- the compound represented by the above general formula (XI) is preferably used. Specific examples of the compound represented by the general formula (XI) include the compounds described above.
- tetraphenyl phosphonium tetrabutyl borate and biphenyl tributyl are preferred because of their high catalytic activity, easy thermal decomposition, and difficulty in remaining in the polymer.
- Preferred are phenylphosphonidium tetraphenylborate and cyclohexyl triphenylphosphonidium tetraphenylborate.
- the quaternary phosphonium salt may be used alone or in combination of two or more.
- the reaction below the catalytic activity becomes insufficient, 1 0 not rather be favored leading to cost up exceeds 2 mol.
- the prepolymer is subjected to main polymerization in a solid state or a swollen solid state to form the polycarbonate.
- main polymerization in a solid state or a swollen solid state to form the polycarbonate.
- the catalyst that meets the above description of the catalyst used in each invention.
- the remaining one may be used as it is, or the same catalyst used at the time of the prepolymerization may be added again at the time of the main polymerization.
- different types of catalysts may be used in the prepolymerization and the main polymerization. Further, in the second invention, an addition method described later can be adopted.
- the catalyst is prepared by using the raw materials of the dihydroxy compound of component (A) and the diester carbonate or phosgene of component (B), and if necessary, a terminal stopper or a branching agent.
- a prepolymer is prepared by performing a prepolymerization in the presence of a prepolymer.
- a prepolymer By treating the dihydroxydiaryl compound and the diaryl carbonate under heating, a prepolymer can be prepared while the aromatic monohydroxyl compound is eliminated.
- the weight average molecular weight of the prepolymer produced in this prepolymerization step is preferably selected in the range of 2000 to 2000.
- a solvent inert to the reaction such as methylene chloride or chloroform, may be used.
- the use ratio (preparation ratio) of dialkyl carbonyl and dihydroxydiaryl compound varies depending on the type of compound used, the reaction temperature, as well as the reaction conditions such as reaction time and reaction temperature.
- the diaryl carbonate is generally used in an amount of 0.9 to 2.5 mol, preferably 0.95 to 2.0 mol, more preferably 0 to 2.0 mol, per 1 mol of the dihydroxydiaryl compound. It is used in a proportion of 0.98 to 1.5 mol.
- the reaction temperature and reaction time vary depending on the type and amount of the raw materials and catalyst used, the required degree of polymerization of the prepolymer obtained, and other reaction conditions. Preferably, it is selected at a temperature of 50 to 350 ° C, preferably in a range of 1 minute to 100 hours. In order not to color the prepolymer, it is desirable to carry out the prepolymerization reaction at a temperature as low as possible and in a short time. In this reaction, a prepolymer having a relatively low molecular weight may be produced by this prepolymerization, so that a colorless and transparent prepolymer having a required degree of polymerization can be easily obtained under the above conditions.
- the pressure during the reaction is properly preferred is 1 t 0 rr ⁇ 5 kg Z cm 2 G.
- prepolymers can be prepared by a known method in which an aromatic dihydroxy compound and phosgene are reacted in the presence of a molecular weight modifier, an acid binder and a solvent.
- an organic solvent solution of the polycarbonate prepolymer is supplied to a granulation vessel in which the prepolymer powder obtained in the prepolymerization step is present,
- the organic solvent may be evaporated to form a spherical prepolymer while the organic solvent solution is in contact with the polycarbonate prepolymer powder.
- the pre-polymer powder used herein can be prepared by the method described above.
- the concentration of the prepolymer obtained in the organic solvent solution is preferably 1 to 50% by weight.
- a spherical prepolymer from an organic solvent solution of a prepolymer first, charge the prepolymer powder in a granulation container and stir the mixture. deep. Next, an organic solvent solution of the prepolymer is supplied here. The supplied organic solvent solution evaporates the organic solvent on the powder while being in contact with the pre-polymer powder that has been stirred, and then continues stirring to produce a spherical shape that is granulated and crystallized to a true spherical shape. You can get Pre-Bolima.
- the spherical prevolimer granulated in the granulation vessel is taken out of the granulation vessel by appropriate means, and is used in the next step to produce polycarbonate by solid-state polymerization or swelling solid-state polymerization.
- a pre-polymer powder previously charged into a granulation container and stirred in advance of granulation can be one that can be obtained by a conventionally known method.
- a concentrated and pulverized product using a method such as a method.
- the particle size of the prepolymer powder to be charged in the granulation container in advance is not particularly limited, but is preferably set to about 0.5 to 3 mm.
- the amount charged is not particularly limited.
- the supply amount of the organic solvent solution of the prepolymer to be supplied to the granulation container is 500% by weight per hour with respect to the retained amount of the prepolymer powder uniformly stirred and existing in the granulation container. It is as follows. There is no particular limitation on the method for supplying the organic solvent solution of prepolymer to the granulation container.
- the presolver organic solvent solution when supplied to the granulation container, if a non-solvent or poor solvent of polycarbonate is simultaneously supplied as a crystallization agent, granulation can be more effectively performed. it can.
- the crystallization agent include linear or cyclic alkanes such as pentane, hexane, heptane and octane; ketones such as acetone and methylethylketone; benzene, toluene and xylene.
- the prepolymer may be mixed with the organic solvent solution of the prepolymer.
- crystallization agent (crystallization agent) (amount of the prepolymer in the organic solvent)
- amount of the crystallization is preferably based on the amount of the prepolymer in the organic solvent solution of the prepolymer. Or 5 to 50% by weight.
- the residence time of the spherical pre-polymer in the granulation vessel is
- the crystallization method is not particularly limited, but a solvent treatment method and a heat crystallization method are preferably used.
- the former solvent treatment methods include aliphatic halogenated hydrocarbons such as chloromethane, methylene chloride, and chloroform, aromatic halogenated hydrocarbons such as chlorobenzene, and ethers such as tetrahydrofuran. , Ester compounds such as methyl acetate, ketone compounds such as acetone, and aromatic hydrocarbons such as benzene.
- the amount of the solvent to be used varies depending on various conditions, but is preferably selected in the range of 0.05 to 100 times the weight of the prepolymer.o
- the heat crystallization method involves heating the prepolymer at a temperature not lower than the glass transition temperature of the aromatic polycarbonate intended for the prepolymer and lower than the temperature at which the prepolymer starts to melt. It is a method of crystallization.
- the temperature T c (° C) at which this heat crystallization is performed depends on the purpose and The temperature is not less than the glass transition temperature of the polycarbonate to be used and is lower than the melting temperature Tm (° C) of the prepolymer.
- a polycarbonate is produced by a transesterification reaction in a molten state.
- a transesterification reaction of the dihydroxy compound (A) and the diester carbonate (B) is carried out at a ratio of 0.9 to 1.5 times the molar ratio of the diester carbonate to the dihydroxy compound. . Note that, depending on the circumstances, a molar ratio of 0.98 to 1.20 is preferred.
- the amount of the terminal terminating agent composed of a monohydric phenol or the like is in the range of 0.05 to 10 mol% with respect to the dihydroxy compound as the component (A), Since the hydroxyl terminal of the polycarbonate to be obtained is sealed, a polycarbonate having sufficiently excellent heat resistance and water resistance can be obtained.
- Such a terminal terminating agent comprising a monovalent phenol may be added in advance to the reaction system in its entirety. Alternatively, a part may be added to the reaction system in advance, and the remainder may be added as the reaction proceeds. Further, in some cases, the whole amount may be added to the reaction system after the transesterification reaction between the dihydroxy compound of the component (A) and the carbonic acid diester of the component (B) partially proceeds.
- the reaction temperature is not particularly limited and is usually selected in the range of 100 to 330 ° C, preferably in the range of 150 to 300 ° C. More preferably, a method in which the temperature is gradually raised to 150 to 300 ° C. in accordance with the progress of the reaction is preferred. If the transesterification temperature is lower than 100 ° C, the reaction rate will be slower, while the temperature will exceed 330 ° C. If this occurs, side reactions may occur or the resulting polycarbonate may be colored, which is not preferred.
- the reaction pressure is set according to the vapor pressure of the monomer used and the reaction temperature. This is not limited, as long as it is set so that the reaction is performed efficiently.
- the atmospheric pressure normal pressure
- 1 to 50 atm 760 to 38, 0000 t0 rr
- the pressure is reduced.
- the condition, and preferably the final, is often between 0.01 and 100 torr.
- reaction time may be set to a target molecular weight, and is usually about 0.2 to 10 hours.
- the above-mentioned transesterification reaction is carried out in a molten state, usually in the absence of an inert solvent. If necessary, the resulting polycarbonate may be reacted in the presence of 1 to 150% by weight of an inert solvent. May be performed.
- the inert solvent include aromatic compounds such as diphenyl ether, halogenated diphenyl ether, benzophenone, polyphenyl ether, dichlorobenzene, and methyl naphthalene. Cycloalkanes such as recycle (5, 2, 10) decan, cyclooctane, cyclodecane and the like can be mentioned.
- the reaction may be performed in an inert gas atmosphere, if necessary.
- examples of the inert gas include gases such as argon, carbon dioxide, nitrous oxide, and nitrogen, and fluorocarbon hydrocarbons. , Alkane such as ethane-propane, and algen such as ethylene and propylene.
- an antioxidant may be added to the reaction system.
- the reaction progresses, the phenols, alcohols, or their esters and the inert solvent corresponding to the carbonic acid diester used are removed from the reactor by the force ⁇ , these separated products are separated.
- Refined and resai Vehicles can also be used, and it is preferable to have equipment to remove them.
- the reaction can be performed in a batch system or a continuous system, and any device can be used. In the case of continuous production, it is preferable to use at least two or more reactors and set the above reaction conditions.
- the material used and the structure of the reactor used are not particularly limited as long as it has a normal stirring function. However, since the viscosity increases in the latter stage of the reaction, a viscous type having a stirring function is preferable.
- the shape of the reactor is not limited to a tank type, but may be an extruder type reactor.
- the catalyst in order to improve), it is preferable to thermally decompose the catalyst by subjecting the reactant to a heat treatment at a temperature equal to or higher than the decomposition temperature of the catalyst, preferably at about 300 ° C.
- the polycarbonate obtained as described above may be granulated as it is, or may be molded using an extruder or the like.
- the prepolymer is subjected to main polymerization in a solid state or a swollen solid state.
- one or two kinds selected from the group consisting of (a) a phosphorus-containing basic compound, and (b) an aryl group and a branched alkyl group are used as a catalyst.
- a quaternary phosphonium salt having the above groups (however, when a quaternary phosphonium salt is used as the phosphorus-containing basic compound of (a), the quaternary phosphonium salt is different from the quaternary phosphonium salt used as (b)) Is used).
- a phosphorus-containing basic compound In the case where only (a) a phosphorus-containing basic compound is used in the above-mentioned preliminary polymerization, one kind selected from the group consisting of (b) an aryl group and a branched alkyl group is used in the main polymerization. Or A quaternary phosphonium salt having two or more groups (however, when a quaternary phosphonium salt is used as the phosphorus-containing basic compound of (a), the quaternary phosphonium salt used as (b) Are different).
- a trivalent or pentavalent phosphorus compound or a nitrogen-containing organic basic compound is used as a catalyst.
- a quaternary phosphonium salt is preferably used as a catalyst, but the nitrogen-containing organic basic compound used in the preliminary polymerization may be used. Furthermore, a trivalent or pentavalent phosphorus compound can be used as a catalyst.
- the polymerization reaction is further carried out on the solid prepolymer, preferably in a crystallized state.
- the reaction is promoted by extracting the aromatic monohydroxyl compound, diaryl carbonate or both, which are by-produced by the reaction, out of the system.
- inert gas such as nitrogen, argon, helium, carbon dioxide or the like, or lower hydrocarbon gas is introduced so as to accompany these gases, and the reaction is carried out under reduced pressure.
- a method using these in combination is preferably used.
- the shape of the crystallized prepolymer in carrying out this solid-state polymerization reaction is not particularly limited, but is preferably a pellet-like or bead-like shape.
- the polymerization reaction temperature T p (° C) and the reaction time vary depending on various conditions, but are preferably higher than the target glass transition temperature of the aromatic polycarbonate and during the solid phase polymerization. Prebolimer does not melt
- the heating is performed by heating at a temperature in the range in which the solid state is maintained for 1 minute to 100 hours.
- the weight average molecular weight of an industrially useful aromatic polycarbonate is about 600,000 to 200,000.
- the polycarbonate having such a degree of polymerization can be obtained. Can be easily obtained. Since the crystallinity of the aromatic polycarbonate obtained by solid-state polymerization of the crystallized prepolymer is generally higher than the crystallinity of the original prepolymer, the crystalline aromatic polycarbonate powder is usually used. Is obtained.
- the obtained crystalline aromatic polycarbonate powder can be directly introduced into an extruder to be pelletized without cooling, or can be directly introduced into a molding machine for molding.
- the ratio between the prepolymerization and the solid-phase polymerization that contribute to the polymerization may be changed in a wide range.
- This method comprises a step of forming a flake of the prepolymer obtained as described above, and a step of performing a solid-state polymerization under the flow of a swelling solvent (a swelling solid weight). Process).
- the molecular weight of the prepolymer which is suitable for the flake-forming step, is from 1500 to 300,000 in terms of viscosity average molecular weight (MV). If the molecular weight is lower than this range, the melting point decreases, and it is necessary to lower the solid-state polymerization temperature, and the reaction rate decreases, which is not preferable.
- MV viscosity average molecular weight
- the shape of the flakes is not particularly limited, but pellets and beads are preferred from the viewpoint of operability.
- the prepolymer flakes are further increased in molecular weight while maintaining the flakes in the solid state.
- This step is characterized in that solid phase polymerization is carried out in a swelling solvent atmosphere, and the efficiency of removing by-product fininol is improved by the swelling effect.
- the swelling solvent used here may be a single swelling solvent capable of swelling the polycarbonate under the following reaction conditions, a mixture of those single swelling solvents, or a single swelling solvent or a mixture thereof. It shows a mixture of the poor solvent of the above as a single solvent or a mixture of several solvents.
- the swelling state in this step refers to a state in which the bleeding polymer flake, which is the reaction raw material, is increased in volume or weight to a value equal to or higher than the thermal swelling value in the range of the following reaction conditions.
- Such a swelling solvent is not particularly limited as long as the above swelling conditions are satisfied.
- the solubility parameter is usually in the range of 4 to 20 (cal / cm 3 ) ' / 2 , preferably?
- Aromatic compounds and oxygen-containing compounds in the range of 1 to 14 (cal / cm 3 ) 1/2 are applicable.
- Specific swelling solvents include, for example, aromatic hydrocarbons such as benzene, toluene, xylene, ethylbenzene, dimethylbenzene, propylbenzene, and dipropylbenzene; ethers such as tetrahydrofuran and dioxane; methylethylketone; Ketones such as methylisobutyl ketone are exemplified. Among them, a single compound of an aromatic hydrocarbon having 6 to 20 carbon atoms or a mixture thereof is preferable.
- the polycarbonate solubility in the solvent is 0.1% by weight or less under the following reaction conditions, and there is little possibility that the solvent is involved in the reaction.
- a saturated hydrocarbon compound having a chain or a branched chain and having 4 to 18 carbon atoms or an unsaturated hydrocarbon compound having 4 to 18 carbon atoms and a low degree is preferred. If the boiling point of both the swelling solvent and the poor solvent exceeds 250 ° C, it becomes difficult to remove the residual solvent, and the quality may deteriorate, which is not preferable.
- the swelling solvent may be contained in the mixed solvent in an amount of 1% by weight or more, preferably 5% by weight or more. Be present in the solvent.
- the reaction temperature is preferably 100 to 240 ° C, and the pressure during the reaction is preferably 10 torr to 5 kg / cm 2 G, particularly preferably large. It is performed under atmospheric pressure. If the reaction temperature is lower than the above range, the transesterification does not proceed, and if the reaction temperature is higher than the melting point of prepolymer, the solid state cannot be maintained, and phenomena such as fusion between particles may occur. And the driving operability is significantly reduced. Therefore, the reaction temperature must be lower than the melting point.
- the swelling solvent gas may be supplied to the reactor in a liquid state and vaporized in the reactor, or may be supplied to the reactor after being vaporized by a heat exchanger or the like in advance.
- the flow rate of the swelling solvent gas may be 1 ⁇ 10 3 cm Z s or more, and preferably 1 ⁇ 10 3 cm / s or more. Further, it is preferable to supply a gas of at least 0.5 liter (standard condition) / hr per 1 g of pre-polymer to the reactor.
- the flow rate of the swelling solvent gas is closely related to the reaction rate, and also acts as a heat carrier at the same time as the finol removal effect. Therefore, the reaction rate increases as the gas flow rate increases.
- a conventional method can be used, and there is no particular limitation.
- the mixing ratio of the inert gas to the swelling solvent may be such that the swelling solvent contains at least 1% by volume of the swelling solvent in the mixed solvent gas. It is better to mix them.
- p-t-butylphenol, p-cuminolephenol, p-phenylphenol are preferably used, if necessary.
- a terminating agent such as knol can be used.
- a known branching agent can be used if necessary.
- a known antioxidant may be added to the reaction system. As this antioxidant, a phosphorus-based antioxidant is preferably used.
- the oxygen concentration in the gas phase in the reaction system in which the polymerization is carried out is preferably 2 ppm or less, and in the fourth invention, this condition is essential.
- This oxygen concentration is preferably 1 ppm or less, and more preferably 0.5 ppm or less.
- the water concentration in the reaction system is preferably 2 ppm or less, and more preferably 1 ppm or less. If the oxygen concentration in the reaction system in which the polymerization is carried out exceeds 2 ppm, the resulting resin tends to be colored, and the thermal stability deteriorates. In addition, when the water concentration in the reaction system exceeds 2 ppm, hydrolysis may occur during the reaction, and the catalytic activity may decrease, which is not preferable.
- the method of reducing the oxygen concentration in the reaction system to 2 ppm or less and the water concentration to 2 ppm or less is not particularly limited, but, for example, an oxygen removing pipe incorporating an oxygen filter or the like in front of the polymerization reactor inlet.
- a moisture removal pipe incorporating a moisture filter or the like may be provided.
- the polycarbonate obtained by the present invention can be used by blending known additives such as a plasticizer, a pigment, a lubricant, a release agent, a stabilizer, and an inorganic filler. Further, if necessary, a known antioxidant may be added to the reaction system. As the antioxidant, a phosphorus antioxidant is preferably used.
- this polycarbonate can be blended with polymers such as polyolefin, polystyrene, polyester, polysulfonate, polyamide, and polyphenylene ether.
- polymers such as polyolefin, polystyrene, polyester, polysulfonate, polyamide, and polyphenylene ether.
- it is effective to use in combination with polyphenylene ether, polyether nitrile, terminal modified polysiloxane compound, modified polypropylene, modified polystyrene, etc. having OH group, COOH group, NH 2 group, etc. at the terminal.
- BPA Bisphenol A
- diphenylcarbonate 23.5 in a nickel steel autoclave with an internal volume of 100 milliliters and a stirrer g (0.11 mol) and the type and amount of catalyst shown in Table 1 were charged, and the atmosphere was replaced with argon five times. Thereafter, the mixture was heated to 180 ° C. and reacted for 30 minutes under an argon atmosphere. Then, the temperature was raised to 210 ° C, the degree of vacuum was gradually raised to 100 mmHg, and the reaction was carried out for 30 minutes. The temperature was further raised to 240 ° C, and the degree of vacuum was gradually increased to 10 ° C. The reaction was raised to mmHg for 30 minutes.
- the temperature was raised to 270 ° C, the degree of vacuum was raised to 2 mmHg, and the reaction was performed for 30 minutes.Then, the reaction was performed at 290 ° C and a degree of vacuum of 0.3 mmHg for 30 minutes, and the reaction was completed I let it.
- the viscosity average molecular weight of the viscous and transparent condensate (polycarbonate) in the autoclave was determined, and the condensate was press-molded to produce a plate having a thickness of l mm and a diameter of 10 mm. This was exposed to a steam at 11 ° C. for 48 hours, and the steam resistance was evaluated by determining the decrease in the viscosity average molecular weight.
- the viscosity-average molecular weight Mv is determined by calculating the ultimate viscosity [] in methylene chloride at 20 ° C.
- BPA Bisphenol A
- diphenyl carbonate 23.00 in a nickel-steel autoclave with an internal volume of 100 milliliters and a stirrer 5 g (0.11 mol) and the type and amount of catalyst shown in Table 1 were charged, and the atmosphere was replaced with argon five times. Thereafter, the mixture was heated to 180 ° C. and reacted for 30 minutes under an argon atmosphere. Then, the temperature was raised to 210 ° C, the degree of vacuum was gradually raised to 100 mmHg, and the reaction was carried out for 30 minutes.The temperature was further raised to 240 ° C, and the degree of vacuum was gradually reduced to 1 ° C.
- Type used amount Type used amount
- T B T B Tetrabutylphosphonium tetrabutyl borate
- TMA H Tetrame Dilmonide Hydroxide
- T P T B Tetraphenylphosphonium tetrabutylborate ⁇ Na ⁇ 1 ppm, Ca ⁇ 1 ppm, K ⁇ 1 ppm
- BPA Bisphenol A
- diphenyl carbonate 2 25 g in a 2 liter Nigel steel clave with stirrer having an internal volume of 1 liter (1.05 mol) and the catalysts shown in Table 3 were added, and argon substitution was performed 5 times. Thereafter, the mixture was heated to 180 ° C. and reacted for 30 minutes under an argon atmosphere. Next, the temperature was raised to 240 ° C over 120 minutes, and at the same time, the degree of vacuum was raised to 8 Hg to react, and the temperature was further raised to 270 ° C over 30 minutes.
- the degree of vacuum was raised to 7 Hg and reacted, and finally the degree of vacuum was raised to 1 Hg and reacted for 5 minutes.
- the inside of the reactor was returned to atmospheric pressure with argon, and the content of prepolymer was taken out and pulverized.
- the number average molecular weight (calculated from the NMR spectrum) of this prepolymer was 350, and the terminal fraction of hydroxyl groups was 49.5%.
- the prepolymer obtained in this way is dissolved in methylene chloride and The powder was precipitated by adding laxylene, concentrated to dryness, and dried under vacuum to obtain a pre-polymer powder.
- This powder was charged into a SUS tube with a diameter of 100 mm and a length of 200 mm, and nitrogen was flowed at 220 ° C at a flow rate of 50 ml / min to perform solid-state polymerization for 90 minutes. .
- Various tests were performed on the polycarbonate obtained by solid-state polymerization in the same manner as in Example 1. Table 4 shows the results.
- Polycarbonate was produced in the same manner as in Examples 7 and 8, except that para-xylene was flowed at a rate of 20 milliliters / minute instead of nitrogen.
- Various tests were carried out on the polycarbonate obtained by the swelling solid phase polymerization in the same manner as in Example 1. The results are shown in Table 4.
- Table 3 Table 3
- Example 8 1 8, 9 0 0 5 0 0
- BPA Bisphenol A
- diphenyl carbonate 2 in a 1 liter Nigel steel clove with a stirrer 25 g (l.05 mol) and 0.5 mmol of tetramethylammonium hydroxide were added, and the atmosphere was replaced with argon five times. Thereafter, the mixture was heated to 180 ° C and reacted for 30 minutes under an argon atmosphere. Then, the temperature was raised to 240 ° C over 120 minutes, the vacuum was raised to 8 mmHg, and the reaction was carried out.The temperature was further raised to 270 ° C over 30 minutes. Then, the degree of vacuum was raised to 7 listen Hg, and the reaction was performed. Finally, the degree of vacuum was raised to 1 Hg, and the reaction was performed for 5 minutes. After the completion of the reaction, the inside of the reactor was returned to the atmospheric pressure with argon, and the content of prepolymer was taken out and pulverized.
- the viscosity average molecular weight of this prepolymer was found to be 8700 by the above method. In addition, the terminal fraction of hydroxyl groups was 50%.
- the prepolymer thus obtained was dissolved in methylene chloride, the catalyst shown in Table 5 was added, para-xylene was added to precipitate a powder, and then concentrated to dryness, followed by vacuum drying. Thus, a prepolymer powder was obtained. 4 g of this powder was charged into a SUS tube with a diameter of 16 mm and a length of 20 Omm, and nitrogen was flowed at 220 ° C at a speed of 50 m / min, and solid phase polymerization was carried out for 90 minutes. Was carried out.
- Example 6 After the completion of the reaction, the obtained polycarbonate was allowed to stand at 34 ° C. under a nitrogen stream for 90 minutes, and then yellow index (YI) was measured (retention burn test). Further, in the same manner as in Example 6, the viscosity average molecular weight was determined, and a high temperature and high humidity test was performed. The results are shown in Table 5 o
- Example 15 was carried out in the same manner except that para-xylene was flowed at a rate of 20 g Z-hour instead of flowing nitrogen at a rate of 50 milliliters / minute.
- the treatment and various tests of the obtained polycarbonate were carried out in the same manner as in Example 11. Table 5 shows the results.
- the prepolymer thus obtained was pulverized while evaporating and removing methylene chloride from the organic solvent solution of the prepolymer to obtain a prepolymer powder.
- a 2-liter autoclave made of Nigel steel with a stirrer and containing 2 liters of bisphenol A (BPA) (1.0 mol) and 25 g of diphenyl carbonate (l.0 0.5 mol) and 0.5 mmol of tetramethylammonium hydroxide were added, and the atmosphere was replaced with argon five times. Thereafter, the mixture was heated to 180 ° C and reacted for 30 minutes under an argon atmosphere. Then, the temperature was raised to 240 ° C over 120 minutes, and the vacuum was increased to 8 mmHg to react.The temperature was further raised to 270 ° C over 30 minutes.
- BPA bisphenol A
- the degree of vacuum was raised to 7 DimHg for the reaction, and finally the degree of vacuum was raised to 1 Hg for 5 minutes.
- the inside of the reactor was returned to the atmospheric pressure with argon, and the contents, ie, prepolymer, were taken out and pulverized.
- the number average molecular weight (calculated from ' ⁇ —NMR) of this prepolymer was 450, and the terminal fraction of hydroxyl groups was 49.5%.
- the prevolimer thus obtained is dissolved in methylene chloride, the catalyst shown in Table 6 is added, para-xylene is added to precipitate a powder, and the powder is concentrated to dryness, and then dried in vacuo to prepare a prevolima powder.
- I got a body. 1 g of this powder was charged into a SUS tube having a diameter of 10 mm and a length of 200 mm, and nitrogen was flowed at 220 ° C at a rate of 50 milliliters / min. Polymerization was performed. At this time, an oxygen removal tube (Indicating oxygen trap (GL Science)) and a water removal tube (Moisture filter (GL Science)) were attached to the polymerization reaction tube inlet.
- GL Science General oxygen trap
- GL Science Water removal tube
- the oxygen concentration in the reaction system is 1.0 Ppm or less, and the water concentration is 0.5 ppm or less.
- the obtained polycarbonate was allowed to stand at 34 ° C. under a nitrogen stream for 90 minutes, and then the yellow index (YI) was measured (retention burn test).
- YI yellow index
- the viscosity average molecular weight was determined in the same manner as in Example 6. The results are shown in Table 6.
- Example 22 The procedure was performed in the same manner as in Example 22 except that only the oxygen removing tube (indicating oxygen trap (manufactured by GL Science)) was attached and the moisture removing tube was not attached. The results are shown in Table 6.
- Example 22 The operation was performed in the same manner as in Example 22 except that the oxygen removing tube and the water removing tube were not used.
- the oxygen concentration in the reaction system was 5 ppm, and the water concentration was 5 ppm.
- the results are shown in Table 6.
- Examples 22 and 23 were the same as Examples 22 and 23 except that paraxylene was flowed at a rate of 20 g hours instead of flowing nitrogen at a rate of 50 milliliters Z. Performed similarly.
- para-xylene is constantly passed under nitrogen through an oxygen removing tube (indicating oxygen trap (GL Science)) and a moisture removing tube (moisture filter (GL Science)). After pressure distillation, it was further published with the same nitrogen for 12 hours.
- the oxygen concentration in the reaction system was less than 1.0 ppm, and the water concentration was 1 ppm. The results are shown in Table 6.
- Example 25 The procedure was performed in the same manner as in Example 25 except that commercially available para-xylene (manufactured by Wako Pure Chemical Industries, Ltd.) was used. At this time, the oxygen concentration in the reaction system was 5 ppm or more, and the water content was 10 ppm or more. The results are shown in Table 6.
- Example 27 In a container with a stirrer having an inner volume of 50 liters, 9.2 mol of bisphenol A, 9.4 liters of a 2.0 N aqueous sodium hydroxide solution, and methylene chloride were added. Eight liters were added and stirred, and a sufficient excess of phosgene was blown into the mixture for 30 minutes.
- HPTB Cyclohexyl triphenyl phosphonimidyl tetraphenyl phenol
- a high-quality polycarbonate excellent in appearance, heat resistance, hydrolysis resistance and the like can be extremely efficiently produced.
- the polycarbonate obtained by the method of the present invention has the above-mentioned properties. Due to their excellent quality, for example, in the electrical and electronic fields, automotive fields, optical material fields (for example, optical and magneto-optical disc materials), and other industrial fields Is preferably used.
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Description
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US09/147,436 US6316575B1 (en) | 1996-06-26 | 1997-06-19 | Processes for the production of polycarbonate |
EP97927392A EP0908484A4 (en) | 1996-06-26 | 1997-06-19 | PROCESSES FOR PRODUCING POLYCARBONATE |
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JP16563296A JPH107784A (ja) | 1996-06-26 | 1996-06-26 | ポリカーボネートの製造方法 |
JP8/165632 | 1996-06-26 | ||
JP20146096A JP3655971B2 (ja) | 1996-07-31 | 1996-07-31 | ポリカーボネートの製造方法 |
JP8/201462 | 1996-07-31 | ||
JP8/201460 | 1996-07-31 | ||
JP20146296A JP3630505B2 (ja) | 1996-07-31 | 1996-07-31 | ポリカーボネートの製造方法 |
JP20146196A JP3347595B2 (ja) | 1996-07-31 | 1996-07-31 | ポリカーボネートの製造方法 |
JP8/201461 | 1996-07-31 |
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KR20010032512A (ko) * | 1998-09-28 | 2001-04-25 | 가즈토 도미나가 | 폴리카보네이트 공중합체 및 그의 제조방법 |
DE19933132A1 (de) * | 1999-07-19 | 2001-01-25 | Bayer Ag | Verfahren zur Herstellung von modifizierten Polycarbonaten |
DE10100404A1 (de) * | 2001-01-05 | 2002-07-11 | Bayer Ag | Verfahren zur Herstellung von Polycarbonat |
US6657038B1 (en) * | 2002-11-01 | 2003-12-02 | General Electric Company | Method for making copolycarbonates |
WO2004076527A1 (ja) * | 2003-02-28 | 2004-09-10 | Idemitsu Kosan Co., Ltd. | 固相重合用ポリカーボネートプレポリマーおよびポリカーボネートの製造方法 |
AU2005252558B2 (en) * | 2004-06-14 | 2007-09-20 | Asahi Kasei Chemicals Corporation | Process for producing aromatic polycarbonate of high quality |
US7183371B2 (en) * | 2004-11-01 | 2007-02-27 | General Electric Company | Method for making polycarbonate |
US7189869B2 (en) * | 2004-11-01 | 2007-03-13 | General Electric Company | Method for making polycarbonate |
WO2007032051A1 (ja) * | 2005-09-12 | 2007-03-22 | Tadahiro Ohmi | 重合体の製造方法及び重合体材料 |
JP6135221B2 (ja) * | 2012-03-30 | 2017-05-31 | 三菱化学株式会社 | ポリカーボネート樹脂の製造方法及びポリカーボネート樹脂組成物 |
KR20150038969A (ko) | 2013-10-01 | 2015-04-09 | 제일모직주식회사 | 정밀 부재용 수납 용기 및 이의 제조방법 |
KR101990844B1 (ko) * | 2015-02-26 | 2019-09-30 | 사빅 글로벌 테크놀러지스 비.브이. | 폴리카보네이트 합성에서 유기 불순물의 조절 |
KR101897361B1 (ko) * | 2016-11-11 | 2018-09-10 | 롯데첨단소재(주) | 정밀 부재용 수납 용기 및 이의 제조방법 |
EP3372626B1 (en) * | 2017-03-10 | 2019-10-23 | SABIC Global Technologies B.V. | Ionic catalyst for the melt polymerization of polycarbonate and method of using the same |
CN107868276B (zh) * | 2017-11-29 | 2019-09-06 | 中蓝晨光化工研究设计院有限公司 | 一种用于制备聚碳酸酯组合物的稳定剂组合物 |
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JPH0726010A (ja) * | 1993-07-06 | 1995-01-27 | Idemitsu Petrochem Co Ltd | ポリカーボネートの製造方法 |
JPH0762074A (ja) * | 1993-08-24 | 1995-03-07 | Mitsubishi Chem Corp | 芳香族ポリカーボネート樹脂の製造法 |
JPH07109346A (ja) * | 1993-10-14 | 1995-04-25 | Mitsubishi Gas Chem Co Inc | ポリカーボネートの製造法 |
JPH07247354A (ja) * | 1994-03-10 | 1995-09-26 | Mitsubishi Gas Chem Co Inc | ポリカーボネートの製造方法 |
JPH09157383A (ja) * | 1995-02-03 | 1997-06-17 | Idemitsu Petrochem Co Ltd | ポリカーボネートの製造方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3208210B2 (ja) * | 1993-03-17 | 2001-09-10 | 旭化成株式会社 | 結晶性芳香族ポリカーボネートプレポリマーの製造方法及び芳香族ポリカーボネートの製造方法 |
WO1996023832A1 (fr) * | 1995-01-31 | 1996-08-08 | Idemitsu Kosan Co., Ltd. | Procede de production de polycarbonate |
-
1997
- 1997-06-19 EP EP97927392A patent/EP0908484A4/en not_active Withdrawn
- 1997-06-19 CN CN97195924A patent/CN1286710A/zh active Pending
- 1997-06-19 US US09/147,436 patent/US6316575B1/en not_active Expired - Fee Related
- 1997-06-19 KR KR1019980710620A patent/KR20000022201A/ko not_active Application Discontinuation
- 1997-06-19 WO PCT/JP1997/002107 patent/WO1997049752A1/ja not_active Application Discontinuation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0726010A (ja) * | 1993-07-06 | 1995-01-27 | Idemitsu Petrochem Co Ltd | ポリカーボネートの製造方法 |
JPH0762074A (ja) * | 1993-08-24 | 1995-03-07 | Mitsubishi Chem Corp | 芳香族ポリカーボネート樹脂の製造法 |
JPH07109346A (ja) * | 1993-10-14 | 1995-04-25 | Mitsubishi Gas Chem Co Inc | ポリカーボネートの製造法 |
JPH07247354A (ja) * | 1994-03-10 | 1995-09-26 | Mitsubishi Gas Chem Co Inc | ポリカーボネートの製造方法 |
JPH09157383A (ja) * | 1995-02-03 | 1997-06-17 | Idemitsu Petrochem Co Ltd | ポリカーボネートの製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP0908484A4 * |
Also Published As
Publication number | Publication date |
---|---|
US6316575B1 (en) | 2001-11-13 |
EP0908484A4 (en) | 2001-06-20 |
CN1286710A (zh) | 2001-03-07 |
EP0908484A1 (en) | 1999-04-14 |
KR20000022201A (ko) | 2000-04-25 |
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