WO2005095487A1 - ポリブチレンテレフタレート - Google Patents
ポリブチレンテレフタレート Download PDFInfo
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- WO2005095487A1 WO2005095487A1 PCT/JP2005/005905 JP2005005905W WO2005095487A1 WO 2005095487 A1 WO2005095487 A1 WO 2005095487A1 JP 2005005905 W JP2005005905 W JP 2005005905W WO 2005095487 A1 WO2005095487 A1 WO 2005095487A1
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- polybutylene terephthalate
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/85—Germanium, tin, lead, arsenic, antimony, bismuth, titanium, zirconium, hafnium, vanadium, niobium, tantalum, or compounds thereof
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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
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
- C08G63/183—Terephthalic acids
Definitions
- the present invention relates to polybutylene terephthalate, and more particularly, to a film or monofilament having excellent color tone, hydrolysis resistance, heat stability, transparency, and moldability, and having reduced foreign matter.
- the present invention relates to polybutylene terephthalate which can be suitably used for fibers, electric and electronic parts, automobile parts and the like.
- Polybutylene terephthalate which is a representative engineering plastic among thermoplastic polyester resins, is easy to mold, has mechanical properties, heat resistance, chemical resistance, fragrance retention, and other physical properties. Because of its excellent chemical properties, it is widely used in injection molded products such as automotive parts, electric and electronic parts, and precision equipment parts. In recent years, it has become widely used in the fields of films, sheets, monofilaments, and fibers, taking advantage of its excellent properties.
- polybutylene terephthalate does not always have sufficient hydrolysis resistance, and particularly when used under moist heat, there is a problem of a decrease in mechanical properties due to a decrease in molecular weight.
- the higher the terminal carboxyl group concentration the worse the hydrolysis resistance of polyester becomes (see, for example, Non-Patent Document 1).
- the higher the terminal carboxyl group concentration the higher the concentration of terminal carboxyl groups. It is a serious problem that the hydrolysis reaction rate under wet heat is high and the molecular weight is reduced due to the hydrolysis, leading to a reduction in mechanical properties and the like.
- Non-patent document 1 Saturated polyester resin handbook (December 22, 1989, published by Nikkan Kogyo Shimbun, pages 192 to 193, page 304)
- Patent Document 1 JP-A-9-316183
- Patent Document 2 JP-A-8-20638
- Patent Document 3 JP-A-8-41182
- the present invention has been made in view of the above circumstances, and has as its object to improve color tone, hydrolysis resistance, heat stability, transparency, and moldability, and to reduce foreign matter.
- Film, monofilament It is an object of the present invention to provide a polybutylene terephthalate which can be suitably used for materials, fibers, electric and electronic parts, automobile parts and the like. Means for solving the problem
- the present inventors have conducted intensive studies to solve the above-mentioned problems, and as a result, it is surprising that the polymerization reaction is carried out in a specific mode using a titanium compound and a metal compound of Group 2A in the periodic table as a catalyst. What should be considered is that the increase in terminal carboxyl groups due to the thermal decomposition reaction is suppressed, the terminal carboxyl group concentration can be significantly reduced even in the low molecular weight region, and the increase in terminal carboxyl group concentration during melt molding can also be suppressed. Not only that, but also the fact that the reaction at the time of polycondensation was greatly accelerated, it was found that the polymerization temperature could be lowered, and the present invention was completed.
- the present invention has been completed based on the above findings, and the gist of the present invention is to obtain a titanium compound and a metal compound of Group 2A of the periodic table as a catalyst, and to have an intrinsic viscosity of 0.7 to 1 OdL Zg with terminal carboxyl group concentration of 0.1-18 / ⁇
- films, monofilaments, fibers, electric and electronic parts, automobile parts, and the like which are excellent in color tone, hydrolysis resistance, heat stability, transparency, and moldability, and have reduced foreign matter.
- a polybutylene terephthalate that can be suitably used for
- FIG. 1 is an explanatory view of an example of an esterification reaction step or a transesterification reaction step employed in the present invention.
- FIG. 2 is an explanatory diagram of an example of a polycondensation step employed in the present invention.
- the polybutylene terephthalate (hereinafter abbreviated as PBT) of the present invention refers to terephthalic acid monohydrate. Position and 1, 4 have butanediol units is ester bond structure, 50 mole 0/0 or more dicarboxylic acid units composed of terephthalic acid units, 50 mol 0/0 or 1, 4-butanediol unit of the diol component A macromolecule consisting of The proportion of terephthalic acid units in all dicarboxylic acid units is preferably at least 70 mol%, more preferably at least 80 mol%, particularly preferably at least 95 mol%, and 1,4-butanediol unit in all diol units is preferred.
- dicarboxylic acid components other than terephthalic acid are not particularly limited. Examples thereof include phthalic acid, isophthalic acid, 4,4′-diphenyldicarboxylic acid, and 4,4′-diphenylditerdicarboxylic acid.
- Aromacyclic dicarboxylic acids such as aromatic dicarboxylic acids, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, 1,4-cyclohexanedicarboxylic acid, malonic acid, succinic acid, and glutaric acid
- aliphatic dicarboxylic acids such as adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid.
- dicarboxylic acid components can be introduced into a polymer skeleton as a dicarboxylic acid or using a dicarboxylic acid derivative such as a dicarboxylic acid ester, a dicarboxylic acid, or a ride as a raw material.
- diol components other than 1,4 butanediol are not particularly limited, and examples thereof include ethylene glycol, diethylene glycol, polyethylene glycol, 1,2 propanediol, 1,3 propanediol, polypropylene glycol, and polytetramethylene.
- Glycol dibutylene glycol, 1,5-pentanediol, neopentyl glycol, 1,6-hexanediol, aliphatic diols such as 1,8-octanediol, 1,2-cyclohexanediol, 1,4-cyclohexanediol, 1 Alicyclic diols such as 1,1-cyclohexandimethylol and 1,4-cyclohexanedimethylol, xylylene glycol, 4,4′-dihydroxybiphenyl, 2,2bis (4hydroxyphenyl) propyl Aromatic geo such as mouth bread, bis (4-hydroxyphenyl) sulfone It can be mentioned Le like.
- hydroxycarboxylic acids such as lactic acid, glycolic acid, m-hydroxybenzoic acid, p-hydroxybenzoic acid, 6-hydroxy-2-naphthalenecarboxylic acid, and p-j8-hydroxyethoxybenzoic acid , Alkoxycarboxylic acid, stearyl alcohol, benzyl alcohol, stearic acid, benzoic acid, t-butyl benzoic acid, benzoyl benzoic acid, etc., monofunctional components such as tricarboxylic acid, trimellitic acid, trimesic acid, trimesic acid, pyromellitic acid, and gallic acid
- trifunctional or higher polyfunctional components such as trimethylolethane, trimethylolpropane, glycerol, and pentaerythritol can be used as copolymer components.
- the PBT of the present invention is used as a catalyst when the oligomer obtained by the esterification reaction (or transesterification reaction) of 1,4-butanediol with terephthalic acid (or dialkyl terephthalate) is used as a catalyst. It is obtained by using compounds and Group 2A metal compounds of the periodic table. These catalysts may be used during the esterification reaction (or transesterification reaction) and brought directly into the polycondensation reaction, or may not be used in the esterification reaction (or ester exchange reaction), or may be used either. May be used, and the other catalyst may be added in the polycondensation step.
- a part of the catalyst amount finally used may be used, and may be appropriately added as the polycondensation reaction proceeds.
- the force and the amount of titanium and the metal in the periodic table 2A inevitably contained in the finally obtained PBT will be described later.
- a titanium compound may be referred to as a titanium catalyst
- a group 2A metal compound of the periodic table may be referred to as a group 2A metal catalyst.
- titanium conjugate examples include inorganic oxides such as titanium oxide and titanium tetrachloride, titanium alcoholates such as tetramethyl titanate, tetraisopropyl titanate and tetrabutyl titanate, and tetraphenyl titanate. Titanium phenolate and the like. Of these, tetraalkyl titanates are preferred, and among them, tetrabutyl titanate is preferred.
- tin may be used as a catalyst.
- Tin is generally used as a tin compound, and specific examples thereof include dibutyltin oxide, methylphenylsulfoxide, tetraethyltin, hexethylditin oxide, and cyclohexahexyldioxide.
- Tin oxide didodecyltin oxide, triethyltin oxide, oxide at mouth, oxide at triphenyltin oxide, oxide at tributyltin acetate, dibutyltin diacetate, diphenyltin dilaurate, monobutyltin trichloride, tributyltin chloride, dibutyltin sulfide, butylhydroxytin Oxides, methylstannoic acid, ethylstannoic acid, butylstannoic acid and the like can be mentioned.
- the added amount of tin is usually 200 ppm or less, preferably 100 ppm or less, more preferably 100 ppm or less, and particularly preferably not added. .
- Specific examples of the Group 2A metal compound of the periodic table in the present invention include various compounds of beryllium, magnesium, calcium, strontium, and norium. From the viewpoint of force handling, ease of access, and catalytic effect, Magnesium compounds or calcium compounds are preferred, and magnesium having an excellent catalytic effect is particularly preferred.
- Specific examples of the magnesium compound include magnesium acetate, magnesium hydroxide, magnesium carbonate, magnesium oxide, magnesium alkoxide, magnesium hydrogen phosphate, and the like.
- Specific examples of the calcium compound include calcium acetate and water. Examples thereof include calcium oxide, calcium carbonate, calcium oxide, calcium alkoxide, and calcium hydrogen phosphate. Of these, magnesium acetate is preferred.
- an antimony compound such as antimony trioxide, a germanium compound such as germanium dioxide and germanium tetroxide, a manganese fluoride compound, a zinc compound
- a zirconium compound a cobalt compound, a phosphoric acid such as orthophosphorous acid, phosphorous acid, hypophosphorous acid, polyphosphoric acid, an ester or a metal salt thereof, a reaction aid such as sodium hydroxide, sodium benzoate or the like. Is also good.
- the content of titanium in the PBT of the present invention is not particularly limited, but is preferably 150 ppm or less by weight as titanium atoms with respect to PBT.
- the lower limit of the titanium content is more preferably in the order of 10 ppm, 20 ppm, and 25 ppm, which are usually 5 ppm, and the upper limit is 80 ppm, 60 ppm, 50 ppm, and 40 ppm, which are usually 100 ppm. The order is even more favorable. If the content of titanium is too large, the color tone and hydrolysis resistance deteriorate, and if it is too small, the polymerizability deteriorates. [0027]
- the content of Group 2A metal in the periodic table in the PBT of the present invention is not particularly limited, but is preferably 150 ppm or less as a Group 2A metal atom in the periodic table by weight relative to PBT.
- the lower limit of the content of the Group 2A metal in the periodic table is more preferably in the order of 5 ppm and 10 ppm, which are usually 3 ppm, and the upper limit is 50 ppm, 40 ppm, 30 ppm, and 15 ppm, which are usually 100 ppm. It becomes more preferable in the order of If the content of Group 2A metal in the periodic table is too large, the color tone and hydrolysis resistance will be poor, and if too small, the polymerizability will be poor.
- the molar ratio of the titanium atom to the periodic table 2A metal atom (periodic table 2A metal Z titanium) contained in the PBT of the present invention is usually 0.01 to 100, preferably 0.1 to 10; It is more preferably from 0.3 to 3, particularly preferably from 0.3 to 1.5.
- the content of metals such as titanium atoms should be measured using a method such as atomic emission, atomic absorption, and inductively coupled plasma (ICP) after recovering the metals in the polymer by a method such as wet ashing. Can be done.
- a method such as atomic emission, atomic absorption, and inductively coupled plasma (ICP) after recovering the metals in the polymer by a method such as wet ashing.
- ICP inductively coupled plasma
- the PBT of the present invention needs to have a terminal carboxyl group concentration of 0.1 to 18 ⁇ eqZg. If the terminal carboxyl group concentration is too high, the hydrolysis resistance of PBT deteriorates, and the object of the present invention cannot be achieved.
- the terminal carboxyl group concentration is preferably 0.5 to 15 eq / g, more preferably 1 to 12 eq / g, and particularly preferably 1 to 10 eq Zg.
- the increase in the terminal carboxyl group concentration excluding the hydrolysis reaction when heat-treated at 245 ° C. for 40 minutes in an inert gas atmosphere is usually 0.1 to 20 eqZg, preferably, It is 0.1 to 15 eq / g, more preferably 0.1 to 10 ⁇ eqZg, particularly preferably 0.1 to 8 ⁇ eqZg.
- the hydrolysis reaction can be prevented by an operation of reducing the water content in the PBT, specifically, by performing drying sufficiently, and does not involve the generation of THF, which is a problem during molding.
- an increase in the terminal carboxyl group concentration due to a decomposition reaction other than hydrolysis cannot be prevented by the drying operation.
- the temperature and the time are defined as follows: if the temperature is too low or the time is too short, the rate of increase in the terminal carboxyl group concentration is too low; This is because the evaluation becomes too inaccurate. Another reason is that if the evaluation is performed at an extremely high temperature, side reactions other than the generation of a terminal carboxyl group occur at the same time, and the evaluation becomes inaccurate. Under the heat treatment conditions, the decrease in the number average molecular weight due to a reaction other than the hydrolysis reaction caused by the moisture contained in the PBT can be ignored, and the increase in the terminal carboxyl group concentration due to the hydrolysis reaction is the amount of the terminal carboxyl group before and after the heat treatment.
- ⁇ AV (h) represents the change in the terminal carboxyl group concentration due to the hydrolysis reaction
- ⁇ ⁇ represents the change in the terminal glycol group concentration before and after the heat treatment.
- the amount of the hydrolysis reaction is small! It is more preferable that the water content of ⁇ used for the heat treatment is usually 300 ppm or less.
- the terminal glycol group concentration before and after the heat treatment can be quantified by 1H-NMR.
- the terminal carboxyl group concentration of the PBT of the present invention can be determined by dissolving the PBT in an organic solvent or the like and titrating it using an alkali solution such as a sodium hydroxide solution.
- the terminal vinyl group concentration of the PBT of the present invention is usually 15 eqZg or less, preferably 10 ⁇ eqZg or less, more preferably 8 eqZg or less. If the terminal butyl group concentration is too high, it may cause deterioration in color tone and solid-state polymerization. When manufacturing PBT with a large molecular weight without lowering the productivity or PBT with a low catalyst concentration, it is generally necessary to raise the polymerization temperature or lengthen the reaction time. Concentration rises Tend to.
- a methoxycarbonyl group derived from a raw material may remain in addition to a hydroxyl group, a carboxyl group, and a vinyl group, particularly when dimethyl terephthalate is used as a raw material.
- the methoxycarbonyl terminal generates methanol, formaldehyde, and formic acid by heat due to solid-phase polymerization, kneading, molding, and the like, and particularly when used for food, the toxicity thereof becomes a problem. Formic acid also damages metal forming equipment and vacuum equipment.
- the concentration of the terminal methoxycarboxy group in the present invention is usually 0.5 eqZg or less, preferably 0.3 eqZg or less, more preferably 0.2 / ⁇ 8 or less, and particularly preferably 0.:LeqZg or less. is there.
- the intrinsic viscosity of the PBT of the present invention needs to be 0.7 to 1. OdLZg. When the intrinsic viscosity is less than 0.7 dLZg, the mechanical strength of the molded product becomes insufficient. 1. When it exceeds OdLZg, the melt viscosity becomes high, the fluidity is poor, and the moldability is poor. Tend to.
- the intrinsic viscosity is preferably from 0.7 to 0.9 dLZg, more preferably from 0.8 to 0.9 dLZg.
- the above intrinsic viscosity is a value measured at 30 ° C using a mixed solvent of phenol Z tetrachloroethane (weight ratio 1Z1).
- the cooling crystallization temperature of the PBT of the present invention is usually 160 to 200 ° C, preferably 170 to 195 ° C, and more preferably 175 to 190 ° C.
- the cooling crystallization temperature in the present invention is the temperature of an exothermic peak due to crystallization that appears when the resin is cooled from a molten state using a differential scanning calorimeter at a cooling rate of 20 ° CZmin.
- the cooling crystallization temperature corresponds to the crystallization speed. The higher the cooling crystallization temperature, the faster the crystallization speed, so that the cooling time during injection molding can be shortened and the productivity can be increased. If the cooling crystallization temperature is low, crystallization takes a long time during injection molding, and the cooling time after injection molding must be lengthened, and the molding cycle tends to elongate and productivity tends to decrease.
- the solution haze of the PBT of the present invention is not particularly limited.
- the solution haze is high, the transparency is poor and the amount of foreign substances tends to increase.Therefore, in applications where transparency is required, such as films, monofilaments, and fibers, the commercial value is significantly reduced. . Solution haze tends to increase when the deactivation of the titanium catalyst is large.
- the content of the cyclic dimer in the PBT of the present invention is usually not more than 1500 ppm, preferably not more than 1200 ppm, more preferably not more than 100 ppm, especially not more than 600 ppm, as a weight ratio to PBT.
- the lower limit is usually 10 ppm.
- the content of the cyclic trimer is usually 100 ppm or less, preferably 800 ppm or less, more preferably 600 ppm or less, particularly preferably 300 ppm or less, and the lower limit is usually 10 ppm. If the content of the cyclic dimer and the cyclic trimer exceeds the above range, mold stains and roll stains are caused, bleed out to the film surface, and there is a problem of dissolution in applications such as food packaging. Become.
- PBT production methods are roughly classified into a so-called direct polymerization method using dicarboxylic acid as a main material and a transesterification method using dialkyl dicarboxylate as a main material.
- the former has a difference in that water is mainly generated in the initial esteridia reaction, and the latter is mainly in the form of alcohol generated in the initial transesterification reaction.
- the method of producing PBT is roughly classified into a batch supply method and a continuous method in which the raw material is supplied or the polymer is discharged.
- the initial esterification reaction or transesterification reaction is performed in a continuous operation, and the subsequent polycondensation is performed in a batch operation, or conversely, the initial esterification reaction or transesterification reaction is performed in a batch operation and the subsequent polycondensation is performed.
- the method of performing the condensation by a continuous operation is also mentioned.
- the direct polymerization method is preferred from the viewpoints of the availability of the raw materials, the ease of processing the distillate, the height of the raw material unit, and the improvement effect of the present invention. Further, in the present invention, from the viewpoint of productivity, stability of product quality, and the effect of improvement by the present invention, a method of continuously supplying raw materials and performing a continuous Esterich reaction or transesterification reaction is proposed. adopt. In the present invention, a so-called continuous method is preferred, in which the polycondensation reaction following the esterification reaction or the transesterification reaction is also performed continuously.
- At least a part of 1,4-butanediol is converted into terephthalic acid (or terephthalic acid) in an esterification reactor (or transesterification reactor), preferably in the presence of a titanium catalyst.
- a step of continuously esterifying (or transesterifying) terephthalic acid (or dialkyl terephthalate) with 1,4-butanediol while supplying the esterification reaction tank (or transesterification reaction tank) independently of the dialkyl). is preferably adopted.
- 1,4-butanediol supplied to the esterification reactor (or ester exchange reactor) independently of terephthalic acid (or dialkyl terephthalate) may be referred to as “separately supplied 1,4-butanediol”. is there.
- the above-mentioned "separately supplied 1,4-butanediol” can be applied to fresh 1,4-butanediol that is unrelated to the process.
- the “separately supplied 1,4-butanediol” collects the 1,4-butanediol distilled from the esteri reactor or transesterification reactor with a capacitor, etc., and transfers it to a temporary tank or the like. It can be held and refluxed to the reaction tank, or the impurities can be separated and purified and supplied as 1,4-butanediol with increased purity.
- the “separately supplied 1,4 butanediol”, which also comprises the 1,4 butanediol power collected by the condenser, etc., may be referred to as “recycled 1,4 butanediol”. From the viewpoint of effective use of resources and simplicity of equipment, it is preferable to assign “recycled 1,4-butanediol” to “separately supplied 1,4-butanediol”.
- 1,4-butanediol which is distilled from the esterification reactor or the transesterification reactor contains, in addition to the 1,4-butanediole component, components such as water, ananolone, THF, and dihydrofuran.
- the 1,4 butanediol distilled out above should be separated and purified from water, alcohol, tetrahydrofuran and other components after being collected by a condenser or while collecting, and then returned to the reaction tank. Is preferred.
- 10% by weight or more of the titanium catalyst used in the esterification reaction is terephthalic acid (or terephthalic acid). It is preferred to supply directly to the liquid phase of the reaction liquid independently of the dialkyl acid).
- the liquid part of the reaction liquid refers to the gas-liquid interface in the esterification reaction tank or the transesterification reaction tank. Indicating the liquid phase side and directly supplying to the liquid phase of the reaction liquid means that the titanium catalyst is supplied to the liquid phase directly without passing through the gas phase of the reactor using piping.
- the proportion of the titanium catalyst directly added to the liquid phase of the reaction solution is preferably at least 30% by weight, more preferably at least 50% by weight, particularly preferably at least 80% by weight, most preferably at least 90% by weight.
- the above titanium catalyst can be supplied directly to the liquid phase portion of the reaction liquid in the esterification reaction tank or the transesterification reaction tank with or without dissolving it in a solvent or the like.
- a solvent such as 1,4 butanediol.
- the concentration at this time is usually 0.01 to 20% by weight, preferably 0.05 to 10% by weight, more preferably 0.08 to 8% by weight, as the concentration of the titanium catalyst based on the whole solution. From the viewpoint of reducing foreign matter, the water concentration in the solution is usually 0.05 to: 0% by weight.
- the temperature at the time of preparing the solution is usually from 20 to 150 ° C, preferably from 30 to 100 ° C, and more preferably from 40 to 80 ° C, from the viewpoint of preventing deactivation and aggregation. Further, from the viewpoint of preventing deterioration, precipitation and deactivation, the catalyst solution is preferably mixed with a separately supplied 1,4-butanediol via a pipe or the like and supplied to the esterification reaction tank or the transesterification reaction tank. .
- a Group 2A metal catalyst may also be supplied to the esterification reaction tank or the transesterification reaction tank.
- the supply position of the Group 2A metal catalyst is not particularly limited.
- the catalyst may be supplied from the gas phase of the reaction solution to the upper surface of the reaction solution or may be directly supplied to the liquid phase of the reaction solution.
- the terephthalic acid or the titanium compound may be supplied together with the terephthalic acid or the titanium conjugate, or may be supplied independently.
- the reaction liquid is preferably supplied from the gas phase to the upper surface of the reaction liquid.
- the group 2A metal catalyst is usually a solid, and can be supplied as it is. However, in order to stabilize the supply amount and reduce adverse effects such as denaturation due to heat, the catalyst is diluted with a solvent such as 1,4 butanediol. It is preferable to supply them.
- the concentration at this time is usually 0.01 to 20% by weight, preferably 0.05 to 10% by weight, and more preferably 0.08 to 8% by weight as the concentration of the Group 2A metal catalyst based on the whole solution. A small amount of water may be added to this solution for the purpose of preventing precipitation and improving thermal stability.
- the Group 2A metal catalyst can also be added to an oligomer pipe or a polycondensation reaction tank following the esterification or transesterification reaction tank to the polycondensation reaction tank.
- the Group 2A metal catalyst is diluted with a solvent such as 1,4-butanediol or a copolymer component such as polytetramethylene ether glycol to stabilize the supply amount and reduce adverse effects such as denaturation due to heat. Is preferred.
- the concentration at this time is usually 0.01 to 20% by weight, preferably 0.05 to: 0% by weight, more preferably 0.08 to 8% by weight as the concentration of the group 2A metal catalyst based on the whole solution. .
- a small amount of water may be added to this solution for the purpose of preventing precipitation and improving thermal stability!
- An example of a continuous esterification method employing a direct polymerization method is as follows. That is, the dicarboxylic acid component having terephthalic acid as a main component and the diol component having 1,4 butanediol as a main component are mixed in a raw material mixing tank to form a slurry, and the slurry is mixed in one or more esterification reaction tanks. And preferably in the presence of a titanium catalyst and a Group 2A metal catalyst, usually from 180 to 260. C, preferably 200-245. C, more preferably 210-235.
- the molar ratio between terephthalic acid and 1,4-butanediol preferably satisfies the following formula (2).
- BM is the number of moles of 1,4-butanediol externally supplied to the esterification reactor per unit time
- TM is the number of moles of terephthalic acid externally supplied to the esterification reactor per unit time
- 1,4-butanediol supplied to the esterification reaction tank from the outside refers to 1,4-butanediol supplied together with terephthalic acid or terephthalic acid dialkylester as a raw material slurry or solution.
- 1,4 butanediol (separately supplied 1,4 butanediol), which is supplied independently, and 1,4 butanediol used as a solvent for the catalyst, etc. 4 Sum of butanediol.
- BMZTM is smaller than 1.1, the conversion rate is reduced or the catalyst is deactivated.
- BMZTM is preferably from 1.5 to 4.5, more preferably from 2.5 to 4.0, particularly preferably from 3.1 to 3.8.
- An example of a continuous method employing the transesterification method is as follows. That is, in one or more transesterification reactors, in the presence of a titanium catalyst and a Group 2A metal catalyst, usually 110 to 260 ° C, preferably 140 to 245 ° C, and more preferably 180 to 245 ° C. At a temperature of 220220 ° C. and usually at a pressure of 10 to 133 kPa, preferably 13 to 120 kPa, more preferably 60 to: L01 kPa, usually for 0.5 to 5 hours, preferably 1 to 3 hours, continuously. The ester exchange reaction is carried out.
- the molar ratio between dialkyl terephthalate and 1,4 butanediol preferably satisfies the following formula (3).
- BM is the number of moles of 1,4-butanediol externally supplied to the transesterification reactor per unit time
- DM is the dialkyl terephthalate externally supplied to the transesterification reactor per unit time.
- BMZDM When the BMZDM value is less than 1.1, the conversion ratio and the catalyst activity are reduced, and when the BMZDM value is more than 2.5, the thermal efficiency is not only reduced, but the secondary efficiency of tetrahydrofuran or the like is reduced. Organisms tend to increase.
- the value of BMZDM is preferably 1.1 to 1.8, more preferably 1.2 to 1.5.
- the esterification reaction or the transesterification reaction is preferably performed at a temperature equal to or higher than the boiling point of 1,4 butanediol in order to shorten the reaction time.
- the boiling point of 1,4-butanediol depends on the pressure of the reaction, but it is 230 ° C at 101.lkPa (atmospheric pressure) and 205 ° C at 50kPa.
- the esterification reaction tank or transesterification reaction tank known ones can be used, and any type such as a vertical stirring complete mixing tank, a vertical thermal convection mixing tank, and a tower-type continuous reaction tank can be used.
- the same or different tanks can be used in series or in parallel. It may be several tanks.
- the stirring device preferred by a reaction vessel having a stirring device is a conventional type having a power unit, a bearing, a shaft, and a stirring blade force, a turbine stator type high-speed rotary stirrer, a disk mill type stirrer, and a rotor mill.
- a high-speed rotating type such as a mold stirrer can also be used.
- the form of the stirring is not particularly limited.
- one part of the reaction solution is connected by piping or the like. It is also possible to take out the reactor outside the reactor, stir the mixture with a line mixer or the like, and circulate the reaction solution.
- the type of the stirring blade can be selected from known types, and specific examples include a propeller blade, a screw blade, a turbine blade, a fan turbine blade, a disk turbine blade, a faudler blade, a full zone blade, and a max blend blade.
- a propeller blade a screw blade, a turbine blade, a fan turbine blade, a disk turbine blade, a faudler blade, a full zone blade, and a max blend blade.
- the obtained oligomer as an esterification reaction product or a transesterification reaction product is transferred to a polycondensation reaction tank.
- the number average molecular weight of the oligomer at this time is usually from 300 to 3000, and preferably ⁇ 500 to 1500.
- a polycondensation reaction tank having different reaction conditions is usually used in a plurality of stages, preferably 2 to 5 stages, particularly preferably 2 to 3 stages, and the molecular weight is gradually increased.
- the form of the polycondensation reaction tank may be any type such as a vertical stirring complete mixing tank, a vertical thermal convection type mixing tank, and a tower-type continuous reaction tank. I can do it.
- at least one polycondensation reaction tank is preferably a type having a stirrer.
- stirrer a general type including a power unit, a bearing, a shaft, and a stirring blade force, and a turbine stator type high speed High-speed rotating types such as a rotary type stirrer, disk mill type stirrer, and rotor mill type stirrer can also be used.
- the form of stirring is not particularly limited.
- one part of the reaction solution is connected by piping or the like. It is also possible to take out the reactor outside the reactor, stir the mixture with a line mixer or the like, and circulate the reaction solution.
- at least one of the polycondensation reactors be a horizontal reactor with a horizontal axis of rotation and excellent surface renewal and self-cleaning properties.
- the polycondensation reaction is carried out usually at 210 to 280 ° C, preferably 220 to 250 ° C, in the presence of a catalyst.
- a temperature of 230 to 245 ° C Preferably at a temperature of 230 to 240 ° C in at least one reaction vessel, preferably with stirring, usually for 1 to 12 hours, preferably 3 to 10 hours. It is performed under reduced pressure of usually 27 kPa or less, preferably 20 kPa or less, particularly preferably 13 kPa or less.
- the reaction may be a batch method or a continuous method, but a continuous method is preferred from the viewpoint of stability of polymer quality and reduction of terminal carboxyl groups.
- At least one reaction tank in at least one reaction tank, usually 1.3 kPa or less, preferably 0.5 kPa or less, more preferably 0.3 kPa or less. It is better to perform under high vacuum.
- the polymer obtained by the polycondensation reaction is usually transferred from the bottom of the polycondensation reaction tank to a polymer extraction die, extracted in a strand shape, and cut with a cutter while or after cooling with water. , Pellets, chips and the like.
- the polycondensation reaction step of PBT is carried out by producing a PBT having a relatively small molecular weight by melt polycondensation, for example, an intrinsic viscosity of about 0.1 to 0.9.
- Solid-state polycondensation solid-state polymerization
- PBT polycondensation
- the PBT of the present invention can be made into a polymer of even higher quality by installing a filter in the flow path of the polymer precursor or polymer.
- the filter If the filter is installed too upstream in the manufacturing process, foreign substances generated on the downstream side cannot be removed, and the pressure loss of the filter will be large where viscosity is high on the downstream side, and the flow rate will be reduced.
- it is necessary to increase the size of the filter, to increase the size of the filter and the facilities such as the piping, and to subject the PBT to high shear when the fluid passes. Deterioration is inevitable. Therefore, the filter should be installed at a position where the intrinsic viscosity of PBT or its precursor is usually 0.1 to 0.9.
- the filter material constituting the filter may be any of a metal wind, a laminated metal mesh, a metal nonwoven fabric, and a porous metal plate. From the viewpoint of filtration accuracy, a laminated metal mesh or a metal nonwoven fabric is particularly preferable. It is preferable that the openings are fixed by sintering.
- the shape of the filter can be any of basket type, disk type, leaf disk type, tube type, flat cylindrical type, pleated cylindrical type, etc. It may be. Further, in order to prevent the operation of the plant from being affected, it is preferable to install a plurality of filters so that the structure can be switched and used, or to install an automatic screen changer.
- the absolute filtration accuracy of the filter is not particularly limited, it is usually 0.5 to 200 / zm, preferably 1 to: LOO m, more preferably 5 to 50 m, and particularly preferably 10 to 30 m. is there. If the absolute filtration accuracy is too high, the effect of reducing foreign substances in the product will be lost, and if it is too low, productivity will decrease and the frequency of filter replacement will increase.
- the absolute filtration accuracy refers to the minimum particle size when completely filtered and removed when a filtration test is performed using standard particle sizes such as glass beads with a known and uniform particle size. .
- FIG. 1 is an explanatory view of an example of an esterification reaction step or a transesterification reaction step employed in the present invention
- FIG. 2 is an explanatory view of an example of a polycondensation step employed in the present invention.
- terephthalic acid as a raw material is usually mixed with 1,4-butanediol in a raw material mixing tank (not shown), and is supplied from a raw material supply line (1) in the form of a slurry or liquid into a reaction tank (A). ).
- the raw material is dialkyl terephthalate, it is usually supplied to the reaction tank (A) as a molten liquid independently of 1,4-butanediol.
- the titanium catalyst is preferably supplied from a titanium catalyst supply line (3) after being made into a solution of 1,4-butanediol in a catalyst preparation tank (not shown).
- the Group 2A metal catalyst is preferably supplied as a solution of 1,4 butanediol in a catalyst preparation tank (not shown), and then supplied from a Group 2A metal catalyst supply line (15).
- the gas which is also distilled from the reaction tank (A) is separated into a high-boiling component and a low-boiling component in the rectification column (C) via the distillation line (5).
- the main components of the high-boiling component are 1,4 butanediol
- the main components of the low-boiling component are water and THF in the case of the direct polymerization method, and anorecone, THF , and water in the case of the transesterification method.
- the high-boiling components separated in the rectification column (C) are withdrawn from the extraction line (6), through a pump (D), and partly from the recirculation line (2) to the reaction tank (A). (7) power ⁇ To the rectification tower (C). The surplus is extracted outside through the extraction line (8).
- the light-boiling components separated in the rectification column (C) are withdrawn from the gas extraction line (9), condensed in the capacitor (G), passed through the condensate line (10), and stored in the tank (F). Is temporarily stored.
- Part of the light-boiling components collected in the tank (F) is returned to the rectification column (C) via the extraction line (11), the pump (E) and the circulation line (12), and the remainder is extracted. It is extracted outside through the exit line (13).
- the condenser is connected to an exhaust device (not shown) via a vent line (14).
- the oligomer produced in the reaction tank (A) is withdrawn through a withdrawal pump (B) and a withdrawal line (4).
- the catalyst supply line (3) is connected to the recirculation line (2), but both may be independent. Further, the raw material supply line (1) may be connected to a liquid phase part of the reaction tank (A).
- the oligomer supplied from the above-mentioned extraction line (4) shown in FIG. 1 is polycondensed under reduced pressure in the first polycondensation reaction tank (a) to form a prepolymer, and then is discharged. It is supplied to the second polycondensation reaction tank (d) via the output gear pump (c) and the extraction line (L1). In the second polycondensation reaction tank (d), the polycondensation usually proceeds further at a lower pressure than in the first polycondensation reaction tank (a) to form a polymer.
- the obtained polymer is withdrawn from the die head (g) in the form of a melted strand through a withdrawal gear pump (e) and a withdrawal line (L3), cooled with water or the like, and then rotated with a rotary cutter ( The pellets are cut in step h).
- the symbol (L2) is the vent line of the first polycondensation reaction tank (a)
- the symbol (L4) is the vent line of the second polycondensation reaction tank (d).
- the PBT of the present invention includes phenols such as 2,6-di-tert-butyl-4-octylphenol and pentaerythrityl-tetrakis [3- (3 ', 5,1-tert-butyl-4, -hydroxyphenyl) propionate].
- the PBT of the present invention may contain a reinforcing filler.
- the reinforcing filler is not particularly limited, but examples thereof include inorganic fibers such as glass fiber, carbon fiber, silica'alumina fiber, zirconia fiber, boron fiber, boron nitride fiber, potassium silicon titanate fiber, and metal fiber. Fibers, aromatic polyamide fibers, and organic fibers such as fluororesin fibers. These reinforcing fillers can be used in combination of two or more. Among the above reinforcing fillers, inorganic fillers, particularly glass fibers, are preferably used.
- the average fiber diameter is not particularly limited, but is usually 1 to: LOO ⁇ m, preferably 2 to 50 ⁇ m, more preferably 3 to 30 ⁇ m. ⁇ m, particularly preferably 5 to 20 / ⁇ .
- the average fiber length is not particularly limited, but is usually 0.1 to 20 mm, preferably 1 to LOmm.
- the reinforcing filler is preferably used after surface treatment with a sizing agent or a surface treatment agent in order to improve the interfacial adhesion with PBT.
- a sizing agent or a surface treatment agent include functional compounds such as epoxy compounds, acrylic compounds, isocyanate compounds, silane compounds, and titanate compounds.
- the reinforcing filler can be surface-treated in advance with a sizing agent or a surface treatment agent, or can be surface-treated by adding a sizing agent or a surface treatment agent when preparing the PBT composition. .
- the amount of the reinforcing filler to be added is usually 150 parts by weight or less, preferably 5 to 100 parts by weight, based on 100 parts by weight of the PBT resin.
- the PBT of the present invention may contain other fillers together with the reinforcing filler.
- Other fillers to be blended include, for example, plate-like inorganic fillers, ceramic beads, asbestos, perlastonite, talc, clay, my strength, zeolite, kaolin, potassium titanate, barium sulfate, titanium oxide, and titanium oxide. Examples include silicon, aluminum oxide, magnesium hydroxide, and the like.
- the plate-like inorganic filler include glass flakes, mica, and metal foil. Among these, glass flake is preferably used.
- a flame retardant can be added to the PBT of the present invention in order to impart flame retardancy.
- the flame retardant is not particularly restricted but includes, for example, organic halogenated compounds, antimony bonded compounds, phosphorus compounds, other organic flame retardants, inorganic flame retardants and the like.
- Organic halogen compounds examples of the product include brominated polycarbonate, brominated epoxy resin, brominated phenol resin, brominated polyphenylene ether resin, brominated polystyrene resin, brominated bisphenol A, and polypentabromobenzyl acrylate. And the like.
- the antimony compound include antimony trioxide, antimony pentoxide, sodium antimonate, and the like.
- Examples of the phosphorus conjugate include phosphoric acid ester, polyphosphoric acid, ammonium polyphosphate, red phosphorus and the like.
- Other organic flame retardants include, for example, nitrogen compounds such as melamine and cyanuric acid.
- Other inorganic flame retardants include, for example, aluminum hydroxide, magnesium hydroxide, silicon compounds, boron compounds and the like.
- the PBT of the present invention may contain conventional additives and the like, if necessary.
- additives are not particularly restricted but include, for example, stabilizers such as antioxidants and heat stabilizers, as well as lubricants, release agents, catalyst deactivators, nucleating agents, crystallization accelerators and the like. No. These additives can be added during or after the polymerization.
- PBT is blended with UV absorbers, stabilizers such as weathering stabilizers, coloring agents such as dyes and pigments, antistatic agents, foaming agents, plasticizers, impact modifiers, etc. to provide the desired performance. Come out.
- the PBT of the present invention may contain polyethylene, polypropylene, polystyrene, polyacrylonitrile, polymethacrylic acid ester, ABS resin, polycarbonate, polyamide, polyphenylene sulfide, polyethylene terephthalate, liquid crystal polyester, polyacetate, if necessary.
- Thermosetting resins such as tar and polyphenol oxide, and thermosetting resins such as phenol resin, melamine resin, silicone resin and epoxy resin can be blended. These thermoplastic resins and thermosetting resins may be used in combination of two or more.
- the method of blending the above various additives and resins is not particularly limited! However, a method using a single-screw or twin-screw extruder having equipment capable of devolatilizing a vent opening force is used as a kneading machine. I like it. Each component, including additional components, can be supplied to the kneader at once, or can be supplied sequentially. It is also possible to premix two or more types of components, each having a selected component strength, including additional components. [0094]
- the molding method of the PBT of the present invention is not particularly limited, and molding methods generally used for thermoplastic resins, that is, molding methods such as injection molding, hollow molding, extrusion molding, and press molding. Can be applied.
- the PBT of the present invention is excellent in color tone, hydrolysis resistance, thermal stability, transparency, and moldability, and thus is suitable for injection molded parts such as electric, electronic parts, and automobile parts.
- injection molded parts such as electric, electronic parts, and automobile parts.
- the improvement effect is remarkable in applications such as films, monofilaments and fibers.
- the acid value and the Kenny's value were also calculated by the following formula (4).
- the acid value was determined by dissolving the oligomer in dimethylformamide and titrating with a 0.1N methanolic KOHZ solution.
- the saponification value was determined by hydrolyzing the oligomer with a 0.5N KOH / ethanol solution and titrating with 0.5N hydrochloric acid.
- PBT was wet-decomposed with high-purity sulfuric acid and nitric acid for the electronics industry, and measured using a high-resolution ICP (Inductively Coupled Plasma) -MS (MassSpectrometer) (manufactured by ThermoQuest).
- ICP Inductively Coupled Plasma
- MS MassSpectrometer
- the temperature was raised from room temperature to 300 ° C at a temperature rising rate of 20 ° CZ min, then the temperature was lowered to 80 ° C at a rate of 20 ° CZmin, and the temperature was raised.
- the temperature at the heat peak was defined as the temperature-down crystallization temperature. The higher the Tc, the shorter the molding stadium where the crystallization speed increases.
- IV ′ intrinsic viscosity
- IV retention rate (%) (IV '/ IV) X 10 0 ⁇ ⁇ ⁇ (6)
- PBT was produced in the following manner.
- a slurry prepared at 60 ° C. mixed with 1.80 moles of terephthalic acid and 1.80 moles of 1,4-butanediol was passed through the raw material supply line (1) in advance to prepare a slurry.
- the reactor was continuously supplied at a pressure of 41 kgZh to a reaction tank (A) for esterification having a screw-type stirrer filled with a 99% PBT oligomer.
- the bottom component of the rectification column (C) at 185 ° C (98% by weight or more was 1,4-b) from the recirculation line (2).
- the butanediol was fed at 20 kg / h, 6. 0 weight 0/0 1 tetrabutyl titanate 65 ° C as a catalyst a titanium catalyst feed line (3), were fed 4-butanediol solution 99GZh (theoretical polymer 30 ppm based on the yield).
- the water content in the catalyst solution was 0.2% by weight.
- Group 2A metal catalyst feed line (15) force was also fed the 6.0 weight 0/0 1, 4-butanediol solution of magnesium acetate salt of 65 ° C as catalyst in 62GZh (15 ppm relative to theoretical polymer yield amount) .
- the water content in the catalyst solution was 10.0% by weight.
- the internal temperature of the reaction tank (A) was 230 ° C, the pressure was 78 kPa, and the generated water, tetrahydrofuran and excess 1,4-butanediol were distilled from the distillation line (5), and rectification was performed. Separated into high-boiling components and low-boiling components in column (C). After the system is stabilized, the high-boiling components at the bottom of the column are 1,4 butanediol at 98% by weight or more and the extraction line (8) so that the liquid level in the rectification column (C) is constant. Part of it was extracted to the outside. On the other hand, low-boiling components were withdrawn in the form of gas from the top of the column, condensed in a condenser (G), and withdrawn from the extraction line (13) so that the liquid level in the tank (F) was constant.
- a certain amount of the oligomer produced in the reaction tank (A) was extracted from the extraction line (4) using the pump (B), and the average residence time of the liquid in the reaction tank (A) was reduced to 2.5 hours.
- the liquid level was controlled as follows. Withdrawal line 4 force
- the extracted oligomer was continuously supplied to the first polycondensation reaction tank (a). After the system was stabilized, the esterification ratio of the oligomer collected at the outlet of the reaction vessel (A) was 96.5%.
- the internal temperature of the first polycondensation reaction tank (a) was 240 ° C, the pressure was 2. IkPa, and the liquid level was controlled so that the residence time was 120 minutes.
- the initial polycondensation reaction was performed while extracting water, tetrahydrofuran, and 1,4-butanediol from a vent line (L2) connected to a pressure reducer (not shown). The withdrawn reaction liquid was continuously supplied to the second polycondensation reaction tank (d).
- the internal temperature of the second polycondensation reaction tank (d) was 240 ° C, the pressure was 130 Pa, the liquid level was controlled so that the residence time was 60 minutes, and the apparatus was connected to a pressure reducer (not shown).
- the polycondensation reaction was further advanced while extracting water, tetrahydrofuran and 1,4-butanediol from the vent line (L4).
- the obtained polymer was continuously extracted in a strand form from the die head (g) via the extraction line (L3) by the extraction gear pump (e), and cut by the rotary cutter (h).
- the intrinsic viscosity of the obtained polymer was 0.70 dLZg, and the terminal carboxyl group concentration was 10.5 ⁇ eq, g.
- the above-mentioned polymer chip was subjected to a solid-state polymerization treatment for 5 hours at 195 ° C. under a reduced pressure (0.133 kPa or less) with a double cocol-type blender (contents: 100 L).
- the intrinsic viscosity of the polymer subjected to the solid phase polymerization treatment was 0.85 dLZg, and the terminal carboxyl group concentration was 5. 1 ⁇ eq g.
- Other analytical values are summarized in Table 1. PBT with excellent color tone and good transparency with few foreign substances was obtained.
- Example 1 was carried out in the same manner as in Example 1 except that the residence time in the second polycondensation reaction tank (d) was set to 90 minutes and the solid-state polymerization step was omitted.
- the obtained PBT analysis values are summarized in Table 1.
- Example 2 the supply amounts of tetrabutyl titanate and magnesium acetate tetrahydrate were adjusted so that the contents of titanium and magnesium in the polymer were as shown in Table 1, and the amounts were set in the second polycondensation reaction tank (d). The procedure was as in Example 2, except that the residence time was 75 minutes. The obtained PBT analysis values are summarized in Table 1.
- Example 2 the supply amounts of tetrabutyl titanate and magnesium acetate tetrahydrate were adjusted so that the contents of titanium and magnesium in the polymer were as shown in Table 1, and the temperature of the second polycondensation reaction tank (d) was adjusted.
- Example 2 the supply amounts of tetrabutyl titanate and magnesium acetate tetrahydrate were adjusted so that the contents of titanium and magnesium in the polymer were as shown in Table 1, and the temperature of the second polycondensation reaction tank (d) was adjusted.
- Example 2 the temperature of the second polycondensation reaction tank (d) was adjusted.
- the obtained PBT analysis values are summarized in Table 1.
- Example 2 the supply amounts of tetrabutyl titanate and magnesium acetate tetrahydrate were adjusted such that the contents of titanium and magnesium in the polymer were as shown in Table 1, and the retention in the second polycondensation reaction tank (d) was performed. The procedure was performed in the same manner as in Example 2 except that the time was changed to 75 minutes. The obtained PBT analysis values are summarized in Table 1.
- Example 2 the content of titanium and calcium in the polymer was as shown in Table 1.
- Example 2 the content of titanium and calcium in the polymer was as shown in Table 1.
- the temperature of the second polycondensation reaction tank (d) was 245 ° C, and the residence time was 75 minutes. I went.
- the obtained PBT analysis values are summarized in Table 1.
- Example 2 except that the supply amount of tetrabutyl titanate was adjusted so that the titanium content in the polymer was as shown in Table 2, and the residence time in the second polycondensation reaction tank (d) was 105 minutes, Performed in the same manner as in Example 2.
- the obtained PBT analysis values are summarized in Table 2. As shown in Table 2, the terminal carboxyl group concentration, color tone, and polymerizability also deteriorated.
- Example 2 was repeated except that the supply amount of tetrabutyl titanate was adjusted so that the titanium content in the polymer was as shown in Table 2 and the residence time in the second polycondensation reaction tank (d) was 90 minutes. Performed as in Example 2.
- the obtained PBT analysis values are summarized in Table 2. As shown in Table 2, the terminal carboxyl group concentration, color tone and haze were deteriorated, and the amount of foreign substances was large, and the polymerizability was also deteriorated.
- the oligomer obtained above was transferred to a 200-L stainless steel reaction tank having a vent tube and a double helical stirring blade, and then a polycondensation reaction was performed.
- the atmospheric pressure was gradually reduced to 0.133 kPa over 85 minutes, and at the same time, the temperature was raised to a predetermined polymerization temperature of 240 ° C.
- the reaction was terminated, and the polymer was extracted.
- the obtained PBT analysis values are summarized in Table 2. As shown in Table 2, the terminal carboxyl group concentration was significantly poor.
- Comparative Example 4 In Example 2, the supply amounts of tetrabutyl titanate and sodium hydroxide were adjusted so that the contents of titanium and sodium in the polymer were as shown in Table 2, and the residence time of the second polycondensation reaction (d) was reduced. The procedure was performed in the same manner as in Example 2 except that the time was changed to 100 minutes. Table 2 summarizes the analysis values of the obtained PBT. As shown in Table 2, the color tone deteriorated and many fish eyes were observed.o
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Titanium content ppm 30 30
- 45 90 90
- Terminal carboxy 'xyl group concentration A eq / g 5.1 10.3 14.2 17.3 17.1 17.8
- Cooling crystallization temperature (Tc) ° C 178.6 178.5 178.9 178.5 178.8 178.5
- 8.3 4.6
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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EP05727839A EP1731546A4 (en) | 2004-04-01 | 2005-03-29 | polybutylene terephthalate |
US10/594,668 US20090264611A1 (en) | 2004-04-01 | 2005-03-29 | Polybutylene terephthalate |
CN200580009848XA CN1938361B (zh) | 2004-04-01 | 2005-03-29 | 聚对苯二甲酸丁二醇酯 |
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JP2004-108918 | 2004-04-01 | ||
JP2004108918 | 2004-04-01 |
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US (1) | US20090264611A1 (ja) |
EP (1) | EP1731546A4 (ja) |
CN (1) | CN1938361B (ja) |
MY (1) | MY140595A (ja) |
TW (1) | TWI366578B (ja) |
WO (1) | WO2005095487A1 (ja) |
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JP5079226B2 (ja) * | 2005-08-29 | 2012-11-21 | 三菱化学株式会社 | ポリブチレンテレフタレート |
JP5284606B2 (ja) * | 2006-07-31 | 2013-09-11 | 三菱エンジニアリングプラスチックス株式会社 | ポリエステル樹脂組成物、および光反射体 |
ATE542858T1 (de) * | 2007-10-17 | 2012-02-15 | Wintech Polymer Ltd | Polybutylen-terephthalat-harz-zusammensetzung und dünner geformter artikel daraus |
CN109535668A (zh) * | 2012-03-30 | 2019-03-29 | 胜技高分子株式会社 | 聚对苯二甲酸丁二醇酯树脂组合物以及成型体 |
US9670313B2 (en) * | 2012-07-30 | 2017-06-06 | Sabic Global Technologies B.V. | Hydrostability of polyester composition |
WO2017110917A1 (ja) | 2015-12-25 | 2017-06-29 | 東洋紡株式会社 | ポリエステル樹脂組成物、これを含む光反射体用部品および光反射体、ならびにポリエステル樹脂組成物の製造方法 |
WO2017199989A1 (ja) * | 2016-05-19 | 2017-11-23 | 三菱エンジニアリングプラスチックス株式会社 | ポリブチレンテレフタレート系樹脂組成物及び成形品 |
CN110234706B (zh) | 2017-02-02 | 2022-01-11 | 东洋纺株式会社 | 聚酯树脂组合物、含该聚酯树脂组合物的光反射体用部件和光反射体 |
JP6642701B2 (ja) | 2017-02-02 | 2020-02-12 | 東洋紡株式会社 | ポリエステル樹脂組成物、これを含む光反射体用部品および光反射体 |
US11795298B2 (en) | 2018-03-26 | 2023-10-24 | Toyobo Mc Corporation | Polyester resin composition, light-reflector component containing same, and light reflector |
CN113881023B (zh) * | 2020-07-01 | 2023-06-06 | 中国石油化工股份有限公司 | 一种固相缩聚制备聚酯的方法和所得聚酯 |
CN112794997B (zh) * | 2020-12-30 | 2022-09-23 | 浙江联盛化学股份有限公司 | 一种多孔复合催化剂、其制备方法及聚对苯二甲酸己二酸丁二醇酯的制备方法 |
CN113999379B (zh) | 2021-12-31 | 2022-03-15 | 江苏新视界先进功能纤维创新中心有限公司 | 一种聚酯合成用钛系复合催化剂及其制备和应用 |
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- 2005-03-29 EP EP05727839A patent/EP1731546A4/en not_active Withdrawn
- 2005-03-29 WO PCT/JP2005/005905 patent/WO2005095487A1/ja active Application Filing
- 2005-03-29 US US10/594,668 patent/US20090264611A1/en not_active Abandoned
- 2005-03-30 TW TW094110099A patent/TWI366578B/zh active
- 2005-03-30 MY MYPI20051430A patent/MY140595A/en unknown
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Also Published As
Publication number | Publication date |
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EP1731546A1 (en) | 2006-12-13 |
CN1938361B (zh) | 2010-11-10 |
TW200604242A (en) | 2006-02-01 |
TWI366578B (en) | 2012-06-21 |
CN1938361A (zh) | 2007-03-28 |
EP1731546A4 (en) | 2008-04-09 |
US20090264611A1 (en) | 2009-10-22 |
MY140595A (en) | 2009-12-31 |
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