WO2003106530A1 - ポリトリメチレンテレフタレート樹脂 - Google Patents
ポリトリメチレンテレフタレート樹脂 Download PDFInfo
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- WO2003106530A1 WO2003106530A1 PCT/JP2003/007567 JP0307567W WO03106530A1 WO 2003106530 A1 WO2003106530 A1 WO 2003106530A1 JP 0307567 W JP0307567 W JP 0307567W WO 03106530 A1 WO03106530 A1 WO 03106530A1
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- polymerization
- prepolymer
- terephthalate
- resin
- polymer
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
-
- 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
-
- 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
- C08G63/785—Preparation processes characterised by the apparatus used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/16—Auxiliary treatment of granules
- B29B2009/165—Crystallizing granules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
Definitions
- the present invention relates to a poly (trimethylene terephthalate) resin and a method for producing the same. More specifically, it is a polytrimethylene terephthalate resin mainly composed of trimethylene terephthalate repeating units, and has an intrinsic viscosity [r?] Of 0.8 to 4.0 dl Zg.
- the molecular weight distribution (Mw / Mn) is 2.0 to 2.7, and the lightness index L value (L-1) and the chromaticness index b * value (b * -l) are each 70 to: LOO and the lightness index L value (L ⁇ 2) after heating the poly (trimethylene terephthalate) resin at 180 ° C. for 24 hours in an air atmosphere.
- the use of the poly (trimethyl terephthalate) resin of the present invention makes it possible to industrially obtain a molded product having excellent strength and color tone.
- the present invention also relates to a method for industrially stably producing the resin with high productivity.
- Conventional technology Poly (trimethylene terephthalate) (hereinafter referred to as “PTT”) has properties similar to nylon (for example, soft hand, low elasticity, excellent elastic recovery, easy dyeability). It has properties similar to those of polyethylene terephthalate (hereinafter referred to as “ ⁇ ⁇ ⁇ ”) (eg, washware uniformity, dimensional stability, yellowing resistance). It is attracting attention as a material applicable to molding materials and the like.
- a melt polymerization method As a polymerization method of (1), a melt polymerization method is widely known.
- Japanese Patent Application Laid-Open No. H5-226262 (corresponding to U.S. Patent No. 5,340,909), International Patent Publication No. 98 ⁇ 23662, Publication No. 0 1 Z144050 and International Publication No. 01-144551 disclose a melt polymerization method using a tank-type polymerization vessel equipped with a stirrer. .
- the stirred tank type polymerization vessel has the advantage of high volumetric efficiency and simplicity.
- polymerization can be advanced efficiently to obtain a polymer with a high degree of polymerization.
- the reaction solution becomes deeper, the effect of thermal decomposition becomes remarkable, and it becomes impossible to obtain a polymer having a high degree of polymerization.
- TMG trimethylene glycol
- a disc ring reactor or cage type reactor is required to efficiently extract TMG out of the system ⁇ cage type technology (US Patent Publication No. WO 0/664 962) and technology using a disc and donut contactor (US Pat. No. 9900).
- these devices are all horizontal stirring tank type devices, they have a rotary drive part. When polymerization is carried out under a high vacuum in order to increase the degree of polymerization, this drive part is used. Because it cannot be completely sealed, leakage of a small amount of oxygen cannot be prevented, and coloring of the polymer is inevitable. This problem is particularly noticeable in PTT.
- a method of free-fall polymerization in which the main body does not have a rotary drive portion and is dropped from the hole of a perforated plate (free-fall polymerization method), is known as a method for producing a resin other than PTT.
- a specific trimethylene terephthalate prepolymer in a molten state is polymerized by a so-called “guide contact drop polymerization process” at a temperature between the crystal melting point of the prepolymer and 290 or less.
- a specific polymethylene terephthalate resin that can be used for industrially stably producing molded articles having excellent strength and color tone can be produced with high productivity and industrially. It has been found that it can be manufactured stably.
- the above specific polymethylene terephthalate resin is mainly composed of trimethylene terephthalate repeating units, has an intrinsic viscosity [77] of 0.8 to 4.0 dl / g, and has a molecular weight distribution (MwZM n) is 2.0 to 2.7, the lightness index L value (L-1) and the chromaness index b * value (b * -1) are 70 to 100 and 15 to 25, respectively. Then, the polytrimethylene terephthalate resin is removed under an air atmosphere.
- the present invention After heating at 180 ° C for 24 hours, the lightness index L value (L-2) and chromaness index b * value (b * -2) are 70 to 100 and --5 to 25 is a polytrimethylene terephthalate resin. Based on this finding, the present invention has been completed.
- one object of the present invention is to provide a poly (methylethylene terephthalate) resin which can be used for industrially stably producing molded articles having excellent strength and color tone.
- FIG. 1 is a schematic diagram showing an example of a polymerization vessel used in the present invention
- FIG. 2 is a schematic diagram showing an example of an inert gas absorbing device and a polymerization device used in the present invention
- Figures 3 to 6 are schematic diagrams each showing an example of a system that can be used to carry out the method of the present invention. Explanation of the code.
- Raw material mixture (including monomers, catalysts, additives, etc.)
- At least one monomer other than the monomer used to obtain the trimethylene terephthalate repeating unit and the monomer used to obtain the trimethylene terephthalate repeating unit is used. 0 to 10 mol% of at least one monomer unit derived from a monomer copolymerizable with
- (B) the molecular weight distribution represented by the ratio Mw / Mn of the weight average molecular weight Mw to the number average molecular weight Mn of the polytrimethylene terephthalate resin is from 2.0 to 2.7;
- the lightness index L value (L-1) is 70 to 100, and the chromaness index b * value (b * -1) is -5 to 25;
- At least one monomer other than the monomer used to obtain the trimethylene terephthalate repeating unit and the monomer used to obtain the trimethylene terephthalate repeating unit At least one monomer unit derived from a copolymerizable monomer 0 to 10 mol%
- Polymethylene terephthalate resin having the following characteristics (A) to (D):
- (B) the molecular weight distribution represented by the ratio MwZMn of the weight average molecular weight Mw to the number average molecular weight Mn of the polymethylene terephthalate resin is 2.0 to 2.7;
- L value (L-1) is 70 or more: L00, chromaness index b * value (b * -1) is -5 to 25; and
- the average weight of the pellets is 1 to 100 Omg Z, and the pellets pass through a filter with a mesh of 30 mesh and a filter with a mesh of 300 mesh.
- the poly (trimethylene terephthalate) resin according to the above (5) which contains 0 to 0.5 wt% of powdery polymethylene terephthalate resin which does not pass through the evening.
- 7. The polytrimethylene terephthalate resin according to the above item 5 or 6, wherein the crystallinity Xc represented by the following formula is 40% or less.
- X c (%) ⁇ pc X (O s- ) ⁇ / ⁇ p s X (P c
- p a is Application Benefits methylene terephthalate rate Tohomopo Ri Li Ma one amorphous density 1. 3 0 0 g Z cm 3 der, p c is Application Benefits methylene terephthalate evening, single Tohomopo Li Ma one the crystal density 1. 4 3 1 g / cm 3 der Ri, p s is of the pair Re' preparative density
- a method for producing a poly (trimethylene terephthalate) resin which comprises the following steps (1) and (2).
- At least one monomer other than the monomer used to obtain the trimethylene terephthalate repeating unit and used to obtain the trimethylene terephthalate repeating unit At least one monomer unit derived from a copolymerizable monomer ⁇ 10 mol%
- the prepolymer in the molten state is continuously supplied to a polymerization zone for performing polymerization of the prepolymer in the molten state in the polymerization step (2), and the polymer is produced in the polymerization step (2).
- step (2) the polymerization is carried out while introducing an inert gas into the polymerization zone, wherein the polytrimethylene terephthalate according to any one of the above items 8 to 11 is used. Resin manufacturing method.
- the amount of the inert gas is from 0.05 to L / g of the poly (methylene terephthalate) resin extracted from the polymerization zone; 12.
- the intrinsic viscosity [7?] Of the prepolymer is 0.5 to 2.0 d1 / g, and the terminal carboxyl group of the prepolymer is 8.
- Polyethylene methylene terephthalate resin of the present invention Tri-methyl terephthalate repeating unit 90 to 100 mol%, and
- At least one monomer other than the monomer used to obtain the trimethylene terephthalate repeating unit and used to obtain the trimethylene terephthalate repeating unit At least one monomer unit (co-monomer unit) derived from a copolymerizable monomer (co-monomer) 0 to 10 mol%
- the trimethylene terephthalate repeating unit is formed by a reaction between a terephthalic acid component and a trimethylene dalicol component.
- the terephthalic acid component include terephthalic acid and diesters of terephthalic acid such as dimethylterephthalic acid.
- the trimethylene glycol component 13-propanediol, 1,2-propanediol, 1,1-propanediol, 2,2-propanediol, or a mixture thereof can be used. However, from the viewpoint of stability, 1,3-propanediol is particularly preferred.
- Examples of the above comonomers include 5 _ sodium sulfoisphoric acid, 5-sodium sulfoisphoric acid, 4-sodium sulfo 2, 6-naphthalenedicarboxylic acid, 3 1,5-dicarboxylic acid benzenesulfonic acid tetramethylphosphonium salt, 3,5—dicarboxylic acid benzenesulfonic acid tetrabutylphosphonium salt, 3,5 dicarboxylic acid benzenesulfonic acid salt Tributylmethylphosphonium salt, 3,6-diphthalic acid naphthalene-4-tetrasulfonic acid tetrabutylphosphonium salt, 3,6-dicarboxylic acid naphthylene-4-tetrasulfonic acid tetramethylphosphonium salt, 3,5-dicarboxylic acid benzenesulfonic acid ammonium salt, 3,2—butanediol, 1,3—butaned
- poly (methylene terephthalate) resin of the present invention can be used in addition to poly (methylene terephthalate) resin in addition to cyclic or linear oligomers or dimethyl terephthalate (hereinafter referred to as “DMT”).
- DMT dimethyl terephthalate
- TPA Terephthalic acid
- TMG trimethylene glycol
- various other products such as anti-glare agents, heat stabilizers, and flame retardants. It may contain additives.
- the degree of polymerization of the poly (trimethylene terephthalate) resin is increased and the distribution of the degree of polymerization is reduced.
- the degree of polymerization can be used with the intrinsic viscosity [T] as an index, and should be at least 0.8 d 1 / g for high strength.
- T intrinsic viscosity
- the distribution of the degree of polymerization be small.
- an index of the degree of polymerization distribution a value obtained by dividing the weight average molecular weight (Mw) obtained by gel permeation chromatography by the number average molecular weight (Mn) (Mw / M n)
- Mw / M n the number average molecular weight obtained by gel permeation chromatography
- Mn number average molecular weight
- the value of w M n must be 2.7 or less.
- M w / M n is more preferably 2.6 or less, further preferably 2.5 or less, and particularly preferably 2.4 or less.
- the lower limit of the polymerization degree distribution is generally 2 for a condensed polymer.
- the color tone of the poly (ethylene methylene terephthalate) resin is determined by a lightness index L to suppress the darkening of the resulting molded product and to facilitate the development of the desired color when coloring with a dye or pigment.
- Value (L-1) is 70 or more and Chromaticness exponent b * value
- (b * -1) must be -5 or more.
- the value of (b * -1) must be 25 or less in order to suppress the yellow color of the molded product.
- the (L-1) value is more preferably at least 75, even more preferably at least 80.
- the (b * -1) value is more preferably from 13 to 15 and even more preferably from 12 to 10.
- the polytrimethylene terephthalate resin used for molding has excellent whiteness, but also drying at a high temperature. It was found that it is important that the polytrimethylene terephthalate resin is not easily colored when heated, as in melt molding. Although the cause is not clear, coloring is caused not only by decomposition of the polymer itself during heating, but also by some coloring-causing substances or functional groups contained in the poly (trimethylene terephthalate) resin in advance. It is thought that it is caused by This substance or government It is considered that the active group is generated by thermal decomposition.
- the leakage of oxygen is small, so that the substance or the functional group is hardly generated, and the surface area is reduced. Since the surface is renewed much more efficiently and efficiently than a normal polymerization vessel, even if the substance or functional group is slightly generated, it is easily extracted out of the system during polymerization. It is considered that polytrimethylene terephthalate resin, which is difficult to color, can be obtained.
- the color tone after heating the polymethylene terephthalate resin at 180 ° C for 24 hours in an air atmosphere can be used.
- the lightness index L value (L 2) at this time is 70 or more, and the chromaness index b * value
- (b *-2) must be _ 5 to 25.
- the (L-2) value is more preferably 75 or more, and even more preferably 80 or more. Also,
- the poly (trimethylene terephthalate) resin of the present invention has a terminal end to make it difficult to be hydrolyzed even when molded in an insufficiently dried state and to improve the weather resistance of a molded article. It is desirable that the carboxyl group concentration be less than 30 meq X kg (weight of polymethylene terephthalate resin).
- the terminal carboxyl group concentration is preferably 20 med / kg or less, more preferably 15 meq / kg or less, particularly preferably 10 meq / kg or less. The lower the terminal carboxyl group concentration, the better.
- Extrusion molded products such as film-sheets are used as polymethylethylene terephthalate resins, but when they are manufactured, higher molecular weight, narrower molecular weight distribution, and lower power are required. It is desirable to satisfy all of the ropoxyl end group concentrations simultaneously. For this reason, as the polymethylene terephthalate resin, the limiting viscosity [r?], MwZMn, and the concentration of olepoxyl end group are preferably 1.25-2.5. dl Z g, 2.6 or less, 20 meq Z kg or less, more preferably 1.30 to 2.O dl Z g, 2.5 or less, 15 meq Z kg or less, respectively.
- the polymerization rate is high and the surface area is large, so that the degree of polymerization can be increased to a level that cannot be achieved by the conventional melt polymerization method, and the terminal lipoxyl group can be reduced. . Also, unlike other melt polymerization methods, it is possible to increase the degree of polymerization while maintaining high piston flow properties (there is no variation in the flow speed due to the resin part and the resin flow is uniform).
- the poly (trimethylene terephthalate) resin of the present invention can be used for spinning or molding in a molten state immediately after production, or once formed into a pellet, then re-melted for spinning or molding. Can also be used.
- pellets it is desired that the pellets be extruded uniformly with an extruder with little loss.
- the pellets be of an appropriate size and that the amount of powdery polymer adhering to the pellet surface be small.
- the average weight of the preferred pellets is between 1 and 100 mg / piece. With this weight, it becomes easier to uniformly extrude with a molding machine, and the handling of pellets during transport, drying and spinning is improved, and the drying speed is increased. I do.
- the average weight is more preferably from 5 to 50 Omg / solid, and particularly preferably from 10 to 20 Omg / piece.
- the shape of the pellet may be spherical, rectangular parallelepiped, cylindrical, or conical, but when handling is considered, the length of the longest part is preferably 15 mm or less, and 1 Omm It is more preferred to be less than or equal to 5 mm and even more preferred.
- the powdered polymer that passes through the mesh filter and does not pass through the 300 mesh filter can be 0-0.5 wt% based on the weight of the pellet. I like it.
- the so-called pneumatic line installed in a so-called pneumatic line or a dryer for conveying pellets by gas. This makes it harder for the filler to become clogged, and reduces fluctuations in the pressure of the extruder during spinning, molding, and compounding, making it easier to obtain a uniform product.
- the crystallinity X c of the pellet is preferably 0 to 40%.
- crystallinity X c is defined by the following equation.
- X c (%) ⁇ p c X ( ⁇ s -p a ) ⁇ / ⁇ p s x (p c
- p a is the amorphous density 1 of Application Benefits methylene terephthalate, single Bok Homopo re-mer. Ri 3 0 0 g / cm 3 der, p c is poly Application Benefits methylene terephthalate evening rate crystals density 1.4 Ri 3 lg / cm 3 der, P s represents the density of the Peretz Bok (g / cm 3).
- the crystal density (1.431 g Z cm 3 ) of the trimethylene terephthalate homopolymer is a theoretical value calculated from the number of crystal lattices of the trimethylene terephthalate homopolymer.
- amorphous density (1.3000 g / cm 3 ) of the trimethylene-terephthalate homopolymer is determined by the density of the amorphous polymer obtained by quenching the molten trimethylene-terephthalate homopolymer. (The sample used for this measurement was confirmed to be amorphous by the fact that no peaks derived from crystals were observed by X-ray diffraction. ).
- the pellet With such a degree of crystallinity, the pellet becomes less brittle and is difficult to occur with other PET and PBT (polybutylene terephthalate), etc., and the pneumatic conveyor
- the crystallinity is more preferably from 0 to 35%, even more preferably from 0 to 30%.
- the crystallinity is an average value in one pellet, but preferably, when the pellet is cut and divided into a surface layer and a central part, the crystallinity is calculated in all parts. Within the range of Good.
- the difference in crystallinity between the surface layer and the center is preferably 40% or less, more preferably 30% or less, and particularly preferably 20% or less.
- the molten poly (ethylene methylene terephthalate) obtained by polymerization is extruded into a strand or sheet, and a refrigerant such as water is used. It is preferable to quickly put in, cool, and then cut.
- the temperature of the refrigerant is preferably 20 ° C. or lower, more preferably 15 ° C. or lower, and even more preferably 10 ° C. or lower.
- the refrigerant temperature is preferably 0 ° C or more.
- Cutting into pellets is preferably performed after the polymer has been extruded and cooled and solidified to 55 ° C or less within 120 seconds.
- the method for producing polytrimethylene terephthalate of the present invention includes the following steps (1) and (2).
- the melt polycondensation of polyamides and polyesters is an equilibrium reaction, but the equilibrium constants differ greatly.
- the equilibrium constant of Po Li Ami de is 1 0 2 orders
- the equilibrium constant of the polyester is about 1, and the equilibrium constant of the polyester is extremely small even for the same polycondensation reaction.
- a large equilibrium constant means that the polymerization proceeds even if the by-products are not efficiently removed outside the system. Therefore, the polymerization degree can be easily increased with the polyamide.
- PET and PBT have small equilibrium constants, by-products can be easily extracted out of the system, so that the degree of polymerization can be increased.
- 1,4-butanediol which is a by-product, can be easily extracted from the system.
- 1,4-butanediol which has a high boiling point, is a substance with a low boiling point, such as tetrahydrofuran produced by the dehydration reaction and butadiene produced by thermal decomposition. It is considered that the material was denatured and extracted outside the system.
- polymethylene terephthalate like other polyesters, has a small equilibrium constant, so that polymerization proceeds only by efficiently removing by-products from the system.
- TMG a by-product of trimethylene terephthalate
- TMG has a high boiling point of 214 ° C, but it is polytrimethylene terephthalate. Since it is necessary to polymerize at a low temperature for thermal decomposition, it is more difficult to extract TMG. Furthermore, the higher the degree of polymerization, the higher the viscosity and the more difficult it is to extract TMG. In such a state, the effect of thermal decomposition becomes remarkable, so that the rate of increase in the degree of polymerization becomes slow, and finally the degree of polymerization starts to decrease.
- the above-mentioned prepolymer having a specific intrinsic viscosity range was melted under reduced pressure at an appropriate temperature range under the above-mentioned conditions.
- polymerization by the contact drop polymerization process causes the polymer to fall into a thread form in PET or other polyamides such as PET, or to fall along a guide such as a linear object. It has been found that poly (trimethylene terephthalate) can be produced without causing any problems in the method of polymerization while performing polymerization.
- the guide contact drop polymerization process does not require a rotary drive in the gas phase of the polymerization vessel, has excellent sealing properties under high vacuum, and has very little coloration due to leaked oxygen. Further, since there is no rotary drive unit, there is no mixing of the sealing liquid, and maintenance is easy. As a result, it becomes possible to produce high-quality poly (methylene terephthalate) resin with little coloring.
- a trimethylene terephthalate prepolymer having an intrinsic viscosity [7?] Of 0.2 to 2 d 1 / g is melted at a temperature not lower than the crystal melting point of the prepolymer and 290 ° C. It is necessary to discharge from the holes in the perforated plate of the polymerizer at the following temperatures.
- trimethylene terephthalate prepolymer refers to a polycondensate having a smaller molecular weight than the polytrimethylene terephthalate resin obtained by polymerization.
- the intrinsic viscosity [] of the pre-polymer is 0.2 or more.
- the viscosity of the prepolymer is high in order to narrow the molecular weight distribution of the obtained polymer and reduce unevenness.
- a local difference occurs in the degree of polymerization due to a local difference in falling speed and surface renewability at the time of falling. It is considered that the difference in the degree of polymerization causes a further difference in the falling state, the difference in the degree of polymerization increases, and the molecular weight distribution broadens.
- the intrinsic viscosity [77] needs to be 2 d 1 _ / g or less.
- the ultimate viscosity [7] of the prepolymer is preferably from 0.3 to 1.8 dl / g, more preferably from 0.4 to: L.5 d1 / g.
- the crystal melting point of prevolima is the endotherm due to the melting of the crystal measured under the following conditions using Pyris 1 DSC (input compensation type differential calorimeter) manufactured by Perkin Elmer, USA. This is the peak value of the peak. The peak value was determined using the attached analysis software.
- the discharge temperature is preferably 5 ° C. or higher and 280 ° C. or lower than the crystal melting point, more preferably 10 ° C. higher than the crystal melting point, and 275 ° C. or lower, more preferably the crystal melting point.
- the temperature is more preferably higher by 15 ° C but lower than 265 ° C.
- the perforated plate that discharges the pre-polymer is a plate-like body having a plurality of through holes.
- the thickness of the perforated plate is not particularly limited, but is usually in the range of 0.1 to 300 mm, preferably in the range of 1 to 200 mm, and more preferably in the range of 5 to 150 mm.
- the perforated plate withstands the pressure of the molten pre-polymer supply chamber, and if the guide in the polymerization chamber in the polymerization vessel is fixed to the perforated plate, the perforated plate has the strength to support the weight of the guide and the falling molten pre-polymer. Necessary and preferably reinforced with ribs etc.
- the holes in the perforated plate are usually circular, oval, triangular, slit, It is selected from shapes such as polygons and stars.
- the opening area of the holes is usually from 0.01 to: LOO cm 2 , preferably from 0.05 to 10 cm 2 , particularly preferably from 0.1 to 5 cm. It is in the range of 2 . It also includes having a nozzle or the like connected to the hole.
- the distance between the holes is the center-to-center distance of the holes and is usually 1 to 50 Omm, preferably 25 to: L00 mm.
- the hole of the perforated plate may be a hole penetrating the perforated plate or a case where a tube is attached to the perforated plate. It may be tapered.
- the material of the perforated plate is usually preferably a metal material such as stainless steel, stainless steel, hastelloy, nickel, titanium, chromium, and other alloys.
- a filter on the upstream side of the perforated plate in the pre-polymer channel. This is because the filter makes it possible to remove foreign matter that blocks the holes of the perforated plate in the prepolymer.
- the type of filter is appropriately selected so that foreign substances larger than the hole diameter of the perforated plate can be removed and the filter does not break due to the passage of the pre-polymer.
- the molten mixture or the polymerized intermediate through such a perforated plate Can be dropped along the guide by a liquid head or by its own weight, or by extruding the molten mixture or polymerized intermediate through a perforated plate by applying pressure using a pump or the like.
- a method and the like can be mentioned, but it is preferable to use a pump having a measuring ability such as a gear pump in order to suppress the fluctuation of the amount of the prepolymer dropped.
- the number of holes in the perforated plate is not particularly limited, and varies depending on conditions such as reaction temperature and pressure, the amount of a catalyst, the range of the molecular weight to be polymerized, and the like. , preferably from 1 to 1 0 4 hole number, it may more preferably be 2 to 1 0 2.
- the prepolymer discharged from the holes of the perforated plate needs to be polymerized under reduced pressure while dropping along the guide in the polymerization zone.
- the foam is formed entirely.
- the guides are wire-like, chain-like, wire-mesh-like combining wire-like materials, so-called jungle-gym-like connecting wire-like materials in a three-dimensional lattice, flat or curved thin plate, or porous.
- Examples of the shape include a plate shape, and a packed tower in which an ordered packing or an irregular packing is stacked.
- the guide shape is preferably a wire shape, a chain shape, a wire mesh shape, or a jungle gym shape.
- the surface area is increased, and the pre-polymer is dropped along a guide that has irregularities in the falling direction of the pre-polymer. It is particularly preferable that the surface renewal is actively caused.For this reason, the guide structure should have at least one selected from the group consisting of concave portions, convex portions, and perforated portions.
- Guidance with special preference is especially preferred. Of course, it is one preferable method to use these guides in combination.
- the term “wire-like” refers to a material having a very large ratio of the length of the cross section and the vertical direction to the average length of the outer circumference of the cross section.
- the area of the cross section is not particularly limited, ranges der usually 1 0 one 3 ⁇ 1 0 2 cm 2 is, is rather to preferred 1 0 - 2 iota Omicron 1 range der of cm 2 is, rather particularly preferably 1 0 - 1 range of ⁇ 1 cm 2.
- the shape of the cross section is not particularly limited, and is usually selected from shapes such as a circle, an ellipse, a triangle, a square, a polygon, and a star.
- the shape of the cross section includes both those having the same shape in the length direction and those having different shapes.
- the wires are hollow. Including.
- the wire 1 includes a single wire or the like or a combination of a plurality of wires by a method such as twisting.
- Examples of the surface of the wire include a smooth surface, a surface having irregularities, a surface partially having projections, and the like.
- the material of the wire it is usually selected from stainless steel, stainless steel, Hastelloy, nickel, titanium, chromium, and other alloys.
- the wire may include various surface treatments such as plating, lining, passivation treatment, and acid cleaning as required.
- the wire mesh shape represents a material obtained by combining the above-mentioned wire-like materials in a lattice shape.
- the combined angle can be arbitrarily selected, including the case where the combined wire is straight or curved.
- the area ratio between the material and the space when projecting the wire mesh material from the direction perpendicular to the surface is not particularly limited, but is usually in the range of 1: 0.5 to 1: 100. It is preferably in the range of 1: 1 to 1: 500, and particularly preferably in the range of 1: 5 to 1: 100.
- the area ratio is preferably equal in the horizontal direction, equal in the vertical direction, or the lower the space ratio, the larger the space ratio.
- the chain shape refers to a material in which rings made of the above-mentioned wire-like material are connected.
- the shape of the ring includes a circle, an ellipse, a rectangle, and a square.
- the connection method includes one-dimensional, two-dimensional, and three-dimensional.
- the jungle gym shape refers to a material in which a wire-like material is three-dimensionally combined in a three-dimensional lattice shape.
- the combination angle can be arbitrarily selected, including the case where the combination is straight or curved.
- a wire with irregularities in the direction of polymer drop refers to a wire with a round or polygonal cross-section rod attached at an almost right angle, a wire with a disk or cylinder attached, etc. (The wire is attached so that it passes through almost the center of the disk or cylinder.)
- the depth of the unevenness is preferably larger than one diameter of the wire and 5 mm or more. Specifically, a wire with a diameter of at least 5 mm larger than the diameter of one wire, a diameter of 100 mm or less, and a thickness of about 1 to 10 mm is attached every 1 to 500 mm. Is mentioned.
- the volume ratio between the combined guide and space is not particularly limited. :. 0 5 to 1: 1 0 7 Ri range der of, preferably 1: 1 0-1: 1 0 Ri 6 range der of the municipal district particularly preferred 1: 1 0 2 to 1: 1 0 5 Range.
- the volume ratio is preferably equal in the horizontal direction, and is equal in the vertical direction, or the ratio of the space is preferably larger in the lower part.
- a single guide or a plurality of guides can be appropriately selected. Wired or linear
- the number is usually 1 to 100,000, preferably 3 to 500,000.
- the number is usually 1 to 100, preferably 2 to 100.
- whether the shape is singular or divided into a plurality can be appropriately selected in consideration of the size of the device, installation space, and the like.
- the pre-polymer is supplied to the guide from one or more holes of the perforated plate.
- the number of holes can be appropriately selected according to the shape of the guide. It is also possible to drop the pre-bolimer that has passed through one hole along multiple guides.However, in order to obtain a polymer with a narrow molecular weight distribution and less unevenness as a uniform drop, It is preferable to reduce the number of guides to be dropped. For example, in the case of a single wire, three or less are preferable.
- There is no particular limitation on the position of the guide as long as the pre-bomb can be dropped along the guide. If the guide is installed through the hole of the multi-hole plate, the guide does not penetrate and is located below the hole of the perforated plate. Can be appropriately selected.
- the height for dropping along the guide is preferably 0.3 to 50 m, more preferably 0.5 to 20 m, and more preferably. Or 1 to: LO m.
- the flow rate of Purebori Ma one to pass through the pores, Ri preferably one hole per, 1 0 - 2 to 1 0 2 liters Z hr, is rather especially preferred, 0:.! ⁇ 5 0 l Zhr range. By setting the content within this range, it is possible to prevent the polymerization rate from becoming extremely low and the productivity from being significantly reduced.
- the average time required to drop along the guide is preferably in the range of 10 seconds to 100 hours, more preferably in the range of 1 minute to 10 hours, and more preferably in the range of 5 minutes to 5 hours. Preferably, 20 minutes to 3 hours are particularly preferable.
- the polymerization while dropping along the guide needs to be performed under reduced pressure. This is because TMG generated as the reaction proceeds is efficiently removed to the outside of the reaction system, and the polymerization proceeds.
- the decompression means that the pressure is lower than the atmospheric pressure. Usually, it is preferably lOOOOPa or less, more preferably 100000Pa or less, more preferably 100OPa or less, and 100Oa or less. Particularly preferred is Pa or less.
- the lower limit is not particularly limited, but it is preferable that the lower limit be 0.1 Pa or more in consideration of the size of equipment for reducing the pressure in the system.
- Another preferred method is to introduce an inert gas that does not adversely affect the reaction under reduced pressure, and remove the generated TMG with these gases.
- the introduction of an inert gas is intended to lower the partial pressure of by-products generated in the polycondensation reaction and promote polycondensation in an equilibrium manner.
- the amount of inert gas introduced in the present invention may be extremely small, and the effect of increasing the polymerization rate by the effect of lowering the partial pressure can hardly be expected, and the role of inert gas cannot be explained by conventional understanding.
- the introduction of the inert gas causes a moderate foaming phenomenon of the molten prepolymer on the guide, and does not contaminate the container wall surface. It has been observed that the surface area of the molten prepolymer significantly increases and the surface renewal state becomes extremely good.
- the average bubble diameter is preferably 5 mm or less, more preferably 2 mm or less.
- the inert gas to be introduced is preferably a gas that does not adversely affect the polymer such as coloring, denaturation, decomposition, and the like, and is preferably nitrogen, argon, helium, carbon dioxide, or a lower hydrocarbon gas.
- the inert gas includes these mixed gases.
- nitrogen, argon, helium, and carbon dioxide are more preferable, and nitrogen is particularly preferable in consideration of availability.
- the amount of the inert gas introduced in the present invention may be extremely small,
- the amount of the polymer extracted from the polymerization reactor is preferably 0.05 to 100 mg / lg.
- the amount of the inert gas is set to 0.05 mg or more per gram of the extracted polymer, the foaming of the polymer becomes sufficient and the effect of increasing the degree of polymerization is enhanced.
- the content is less than 100 mg, it is easy to prevent the degree of decompression from deteriorating.
- the amount of the inert gas is more preferably from 0.1 to 50 mg per gram of the polymer to be extracted, and particularly preferably from 0.2 to 10 mg.
- the introduction position be far from the dispersion plate and close to the polymer outlet. It is also desirable to be further away from the vacuum exhaust line.
- methods for preliminarily absorbing and / or containing the prepolymer include, for example, chemical equipment design and operation series N 0.2, revised gas absorption 49-54 (Showa 56 (March 15th, published by Nihonkoku Kogyo Kogyo Co., Ltd.) packed-bed absorber, shelf-type absorber, spray tower-type absorber, fluidized-packed tower-type absorber, liquid film cross-flow absorber , High-speed swirling type absorber, mechanical power 03 07567
- a method using a known absorption device such as an absorption device or a method of injecting an inert gas into a pipe may be used.
- the most preferable method is to use a device for absorbing the inert gas while dropping the prepolymer along the guide in an inert gas atmosphere.
- an inert gas having a higher pressure than the inside of the polymerization reactor is introduced into a device for absorbing the inert gas.
- the pressure is preferably from 0.01 to LMPa, more preferably from 0.05 to 0.5 MPa, even more preferably from 0.1 to 0.2 MPa.
- foaming refers to both the state in which the foam pops out and disappears immediately, and the state in which the foam is maintained.
- the ambient temperature when dropping along the guide needs to be not lower than the crystal melting point of the prepolymer and not higher than 290 ° C.
- the temperature at the time of dropping is preferably within the above temperature range, and the difference from the discharge temperature is preferably within 20 ° C, and more preferably the difference is within 10 ° C.
- the difference is within 5 ° C, and it is most preferable that the temperature is the same as the discharge temperature.
- Such a temperature can be controlled by appropriately controlling the temperature of a heater or a jacket disposed on the polymerization reactor wall covering the guide, or by putting a heat medium or a heat medium inside the guide, and reducing these temperatures. Achieved by proper control.
- the prepolymer used in the present invention preferably contains a polycondensation catalyst in order to increase the polymerization rate.
- Preferred examples of the polycondensation catalyst include titanyl alkoxide represented by titanate laboxide and titanate trisopropoxide, titanium dioxide, double salts of titanium dioxide and silicon dioxide, diantimony trioxide, Examples include antimony compounds such as antimony acetate, tin compounds such as butylstannic acid, butyltin tris (2-ethylhexoate), and tin 2-ethylhexanoate. Titanate laboxide and tin 2-ethylhexanoate are particularly preferred in that the reaction rate is high and the color tone can be improved. These catalysts may be used alone or in combination of two or more.
- the amount of the polycondensation catalyst is preferably 0.001 to 1% by weight based on the weight of the prepolymer used, and is preferably 0.05 to 0.5% by weight. It is particularly preferable to add 0.01 to 0.2% by weight.
- the degree of polymerization of the prepolymer is further increased and the prepomer is further prepared.
- the intrinsic viscosity [] of the prepolymer is more preferably 0.55 or more, and particularly preferably 0.60 d1 / g or more.
- terminal carboxyl group ratio is preferably 50% or less.
- the terminal carboxyl group ratio is a value determined according to the following formula. Terminal carboxyl group ratio (%)
- Terminal carboxyl group concentration Equivalent of carboxyl group per 1 kg of sample
- Total terminal group concentration Equivalent of all terminal groups per 1 kg of sample By setting the ratio of terminal carboxyl groups to 50% or less, the polymerization rate can be increased, and a high degree of polymerization can be achieved. At the same time, coloring can be suppressed.
- Lepoxyl end group The ratio is more preferably 30% or less, still more preferably 20% or less, and most preferably 0%.
- Such a prepolymer suitable for producing a polymer having a very high degree of polymerization has a high intrinsic viscosity, so that the viscosity becomes high and it becomes difficult to extract TMG out of the system. It becomes increasingly difficult to manufacture industrially with a vessel.
- to keep the carboxyl terminal group ratio low it is necessary to increase the polymerization rate and suppress thermal decomposition. For this reason, it is preferable to produce the prepolymer using a horizontal stirring polymerization apparatus having a large surface area and a high surface renewal efficiency and having a single-axis or two-axis stirring blade.
- a method of continuously supplying a prepolymer, polymerizing it while dropping it along a guide from a hole of a perforated plate in a molten state, and extracting all the dropped polymer a method of dropping a polymer
- the polymerization may be carried out while circulating the liquid and falling along the guide again, but a method of extracting all the dropped polymer is preferable.
- this is to prevent thermal decomposition in the liquid reservoir and circulation line after dropping along the guide. It is preferable to reduce the residence time in these places and lower the temperature.
- the lower alcohol diester of terephthalic acid is transesterified with TMG to produce bis (3-hydroxypropyl) terephthalate, an intermediate of PTT.
- TMG bis (3-hydroxypropyl) terephthalate
- ester exchange method a polycondensation reaction of the ⁇ ⁇ ⁇ ⁇ to produce ⁇ ⁇ prepolymer
- ⁇ Direct esterification method After the esterification reaction between the acid and TMG to obtain ⁇ ⁇ ⁇ ⁇ , a method for producing ⁇ ⁇ ⁇ prepolymer by subjecting the ⁇ ⁇ ⁇ ⁇ to a polycondensation reaction in the same manner as in the first method (hereinafter referred to as ⁇ Direct esterification method ”).
- the batch polymerization method (also referred to as a batch method), in which the raw materials and the like are all charged into a reaction device and reacted simultaneously to obtain a trimethylene terephthalate prepolymer, is roughly classified according to the difference in the production method.
- There is a continuous polymerization method in which raw materials are continuously charged into a reactor to continuously obtain trimethylene terephthalate prepolymer.
- ⁇ means “unreacted terephthalic acid, lower alcohol ester of terephthalic acid, TMG, and ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ .
- it is a low molecular weight or low molecular weight oligomer.
- dimethyl terephthalate hereinafter referred to as “DMT”), a kind of lower alcohol ester of terephthalic acid, and TMG are mixed at 150 to 240 ° C in the presence of a transesterification catalyst.
- DMT dimethyl terephthalate
- TMG a kind of lower alcohol ester of terephthalic acid
- TMG TMG
- ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ can be obtained by transesterification at temperature. Due to the high volatility of the raw material DMT in the transesterification method, it is preferable to divide the reactor into two or more units and change the temperature according to the conversion.
- the molar ratio of the lower alcohol diester of terephthalic acid to TMG is preferably from 1: 1.3 to 1: 4, more preferably from 1: 1.5 to 1: 2.5. 1: If TMG is less than 1.3, the reaction time will be significantly longer. On the other hand, if the TMG is higher than 1: 4, it is not preferable because the TMG that does not participate in the reaction needs to be volatilized and the polymerization time becomes longer.
- transesterification catalyst In the transesterification method, it is necessary to use a transesterification catalyst.
- Preferred examples include titanyl alkoxides represented by titanyl tributoxide, titan tetrisopropoxide, and the like.
- 2- Tin compounds such as tin ethylhexanoate, cobalt acetate, calcium acetate, zinc acetate and the like.
- titanate laboxide 2 -ethyl hexanoate is preferred because it also acts as a catalyst for the subsequent polycondensation reaction.
- the transesterification catalyst amount is 0.02 to 1% by weight, preferably 0.05 to 0.5% by weight, more preferably 0.08 to 0.2% by weight, based on the terephthalic acid diester. I like it.
- BHPT can be obtained by subjecting terephthalic acid and TMG to an esterification reaction at a temperature of 150 to 240 ° C.
- the molar ratio of terephthalic acid to TMG at the time of preparation is preferably from 1: 1.05 to 1: 3, more preferably from 1: 1.1 to 1: 2. 1: If TMG is less than 1.05, the reaction time will be prolonged significantly, or coloring will occur. Further, if TMG is larger than 1: 3, it is not preferable because TMG that does not participate in the reaction needs to be volatilized, and the polymerization time becomes longer.
- an esterification catalyst is not always necessary because the proton released from terephthalic acid acts as a catalyst, but it is preferable to use an esterification catalyst to increase the reaction rate.
- Preferable examples include, for example, tin compounds such as tin titanyl laboxide and tin titanyl oxoxide 2-ethyl hexanoate represented by titanium tetraisopropoxide.
- the addition amount is preferably from 0.02 to 1% by weight, more preferably from 0.05 to 0.5% by weight, and from 0.08 to 0.2% by weight, based on the terephthalic acid used. More preferred.
- BHPT BHPT and the raw materials terephthalic acid and TMG can be simultaneously charged to start the reaction.
- the reaction can be carried out by charging a fixed amount of a mixture of terephthalic acid and TMG into a reactor that directly performs an esterification reaction, and discharging a certain amount of a reaction product (BHPT).
- the BHPT obtained by the above method is subsequently subjected to polycondensation to produce the prepolymer used in the present invention.
- Production of prepolymer by polycondensation is carried out while reacting BHPT under a reduced pressure or an inert gas atmosphere at a predetermined temperature to remove by-product TMG.
- the temperature for performing such polycondensation is preferably 230 to 280 ° C. If the temperature is lower than 230 ° C, the reactants solidify or the reaction time becomes longer. On the other hand, when the temperature exceeds 280 ° C, thermal decomposition becomes severe, and it becomes difficult to obtain a polymer having an excellent color tone.
- the temperature is preferably from 23 to 27 ° C, more preferably from 23 to 27 ° C.
- the polycondensation reaction can be performed under reduced pressure or under an inert gas atmosphere.
- the pressure is reduced, the degree of pressure reduction is appropriately adjusted depending on the sublimation state and reaction rate of the BHPT and the polycondensation reaction product.
- the process is performed in an inert gas atmosphere, it is important to replace the inert gas sufficiently as needed so that the by-product TMG can be efficiently removed.
- a polycondensation catalyst For polycondensation of BHPT, it is desirable to use a polycondensation catalyst. Unless a polycondensation catalyst is used, the polycondensation time becomes longer.
- the polycondensation catalyst include titan alkoxide, typified by titanate tributoxide, titanate trisopropoxide, titanium dioxide, double salts of titanium dioxide and silicon dioxide, and trioxide.
- Antimony compounds such as diantimony and antimony acetate; tin compounds such as butylstannic acid, butyltin tris (2-ethylhexanoate) and tin 2-ethylhexanoate; Tin titanyl tert-butoxide 2-ethyl hexanoate is particularly preferred in that the reaction speed is high and the color tone can be improved.
- These catalysts may be used alone or in combination of two or more.
- the amount of the polycondensation catalyst is preferably 0.01 to 1% by weight based on the weight of the prepolymer used, and is preferably 0.05 to 0.5% by weight. It is more preferable to add 0.01 to 0.2% by weight. When a compound that also acts as a polycondensation catalyst is used in the process of obtaining ⁇ ⁇ ⁇ ⁇ , the above amount including the amount of the compound may be used.
- Apparatuses for performing such polycondensation include a vertical stirring polymerization reactor, a horizontal stirring reactor having a single-shaft or two-shaft stirring blade, a free-flowing thin-film polymerization reactor having a shelf, Examples include a thin film polymerization vessel that naturally flows down an inclined plane. Of course, when these are used together, is there.
- the same apparatus can be used for the polycondensation reaction from the start of the polycondensation of BHPT until the prepolymer is obtained, but of course, it may be divided into two or more reactors.
- it is preferable to divide the reactor into two or more reactors and change the temperature, degree of decompression, etc. in order to promote the reaction efficiently.
- additives such as an anti-glazing agent, a heat stabilizer, a flame retardant, an antistatic agent, a defoaming agent, a coloring agent, an antioxidant, an ultraviolet absorber, a crystal nucleating agent, A whitening agent may be copolymerized or mixed. These additives can be added at any stage of the polymerization.
- the addition of a stabilizer at any stage of the polymerization, preferably prior to the polycondensation of BHPT, improves whiteness, improves melt stability, acrolein, and ⁇ -ray. It is preferable from the viewpoint of controlling the generation of organic substances having a molecular weight of less than or equal to 300 with lil alcohol.
- a pentavalent or / and trivalent phosphorus compound / hindered phenol compound is preferable.
- the amount of the phosphorus compound to be added is preferably 2 to 250 ppm as a weight ratio of the phosphorus element contained in the PTT, and more preferably 5 to 150 ppm. Therefore, 10 to 100 ppm is more preferable.
- the hindered phenolic compound is a phenolic derivative having a substituent having steric hindrance at a position adjacent to the phenolic hydroxyl group, and is a compound having one or more ester bonds in the molecule.
- pentaerythritol root trakis [3— (3,5—di-tert-butyl-4—hydroxyphenyl) propionate], 1,1'3—tris ( 2 — Methyl — 4 — Hydroxy 5 — tert-Butylphenyl) butane, 1, 3, 5 _ trimethyl-1, 2, 4, 6 — Tris (3, 5 — di-tert-butyl-4) (Hydroxybenzyl) benzene, 3,9-bis ⁇ 2-1 [3- (3-tert-butyl-4-hydroxy-5-methylphenyl) propionyloxy]]-1,1,1-dimethylethyl ⁇ 1,2,4,8 , 10—Tetraoxaspiro [5,5] indecane, 1,3,5—Tris (4-tert-butyl-3—hydroxy-1,2,6-dimethylbenzene) Acid, triethyldalichol-bis [3- (tert-butyl)
- pen-erythritol-tetrakis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate] is preferable.
- the amount of the hindered phenolic compound to be added is preferably 0.01 to 1% by weight as a weight percentage based on the obtained poly (methylene terephthalate) resin. In addition, 0.05 to 0.5% by weight is more preferable, and 0.01 to 0.1% by weight is more preferable. Of course, using these stabilizers in combination is also one of the preferred methods.
- FIG. 1 shows a specific example of a polymerization vessel used in the method of the present invention.
- Trimethylene terephthalate prepolymer A is supplied to the polymerization reactor 10 from the raw material supply port 2 via the transfer pump 1, introduced into the polymerization reactor through the perforated plate 3, and guided along the guide 5. Fall.
- the inside of the polymerizer is controlled to a specified degree of decompression, and TMG distilled out of the pre-polymer, gas supply port if necessary
- the inert gas E such as nitrogen introduced from 6 is discharged from vent port 7 (exhaust gas D).
- the polymerized polymer B is discharged from the discharge port 9 by the discharge pump 8.
- the polymerization vessel main body 10 and the like are heated and kept warm by a heater or a jacket.
- Fig. 2 shows that the inert gas is absorbed and Z or contained in advance while the pre-polymer is dropped along the guide in an inert gas atmosphere, and is absorbed by the pre-polymer under reduced pressure.
- the trimethylene terephthalate prepolymer A first passes through the perforated plate N from the raw material supply port N 3 through the transfer pump N 2, and passes through the inert gas inlet port N 6 to supply nitrogen or the like. It is continuously introduced into the inert gas supply device into which the inert gas E has been introduced, and falls along the guide N5. Next, it is supplied to the polymerization reactor 10 from the raw material supply port 2 via the transfer pump N 7, continuously introduced into the polymerization reactor through the multi-hole plate 4, and falls along the guide 5.
- the inside of the polymerization vessel is controlled to a predetermined degree of reduced pressure.
- the inert gas absorbed by or absorbed in prepolymer A by the inert gas supply device is released inside the polymerization reactor.
- TMG, etc. distilled from Pre-Bolima and the introduced inert gas are exhausted from the vacuum exhaust port 7 (exhaust gas D).
- the polymerized polymer B is continuously discharged from a discharge port 9 by a discharge pump 8.
- Inactive The gas absorber N 1 and the polymerization reactor 10 are heated and kept warm by the heater or the jacket.
- the polymer that has fallen along the guide is collected at the bottom of the polymerization vessel, and is then drawn out of the discharge port by a discharge pump. It is preferable to keep it as small as possible and as constant as possible. By doing so, it becomes easy to suppress coloring and a decrease in the degree of polymerization due to thermal decomposition, and to suppress variation in the quality of the polymer.
- the accumulated amount can be monitored from the observation window 4, and the accumulated amount can be controlled by the transfer pump 1 and the discharge pump 8.
- the polymerization vessel used in the method of the present invention can be provided with a stirrer or the like in the polymerization vessel bottom, but is not particularly required. Therefore, it is possible to eliminate the rotation drive section in the polymerization vessel main body, and it is possible to perform polymerization under a highly sealed condition even under a high vacuum.
- the sealing performance of the rotation drive unit of the discharge pump is better than the case where there is a rotation drive unit in the polymerization reactor main body due to the presence of the liquid head.
- the method of the present invention can be carried out with one polymerization reactor, but may be carried out with two or more reactors. It is also possible to partition one polymer group vertically or horizontally to make a multi-stage polymerizer.
- a process of increasing the molecular weight from a trimethylene terephthalate prepolymer to a polytrimethylene terephthalate resin having a desired polymerization degree (a guide contact drop polymerization process).
- horizontal stirring polymerization reactors examples include screen type, independent blade type, single-shaft type, and twin-shaft type.
- reaction Engineering Research Group Research Report: Reactive Processing Part 2 (High Molecular Society; 1992) Polymerization vessels described in Chapter 4 and the like.
- a perforated plate reactor which polymerizes while free-falling
- US Pat. No. 5,596,067 can be referred to.
- polymerization is carried out while freely falling from the holes of the perforated plate.
- the trimethylene terephthalate prepolymer is polymerized while dropping freely from the holes of the perforated plate in a molten state to increase the degree of polymerization of the trimethylene terephthalate prepolymer.
- freely dropping means a state of dropping without contacting a guide, a wall, or any other object that causes drop resistance.
- the shape of the prepolymer is a film, a thread, a droplet, a mist, or the like.
- TMG and other substances generated by the condensation reaction are extracted.
- shape of the holes in the perforated plate in this method is usually selected from shapes such as a circle, an ellipse, a triangle, a slit, a polygon, and a star.
- Sectional area of the holes is typically 0. 0 1 ⁇ 1 0 0 cm 2 der is, Ri preferred and rather is 0. 0 5 ⁇ 1 0 cm 2 der, is rather particular preferred 0.. 1 to 5 cm 2 Range.
- nozzles and guides that connect to the holes may be provided, but they must then be able to fall freely.
- the distance between the holes is usually 1 to 500 mm, preferably 5 to: L00 mm, as the distance between the centers of the holes.
- the free fall height after passing through the hole is preferably between 0.3 and 50 m, more preferably between 0.5 and 20 m.
- the flow rate of Purebori mer to tooth umbrella through the will, Purebori mer molecular weight by connection be different, but usually, Ri per one hole, 1 0 _ 4 to 1 0 4 Li Tsu Torr Z hr, is preferred to rather 1 0 - 2 to 1 0 2 Li Tsu torr / hr, the rather particular preferred in the range of 0.1 to 5 0 l / hr.
- the time required for free fall is not particularly limited, it is usually in the range of 0.01 second to 1 hour.
- the polymer obtained by dropping freely may be extracted as it is, but it is also preferable to circulate and polymerize while freely dropping again.
- a new liquid surface area that can be formed per unit time can be obtained by circulating while freely falling, so that a desired molecular weight can be obtained. Is sufficient to facilitate the polymerization.
- any of the stirring tanks described in Chapter 11 of the Chemical Equipment Handbook (edited by the Japan Society for Chemical Engineering; 1989) can be used.
- the shape of the tank is not particularly limited, and a vertical or horizontal cylindrical type is usually used.
- the shape of the stirring blade is not particularly limited, and a paddle type, anchor type, evening bottle type, screw type, ripon type, double blade type and the like are used.
- the thin-film polymerization device examples include a device that performs polymerization while dropping in a wet-wall type, and a polymerization device that uses a centrifugal thin-film heat exchanger, a surface liquid film heat exchanger, and the like.
- a device that performs polymerization while dropping in a wet-wall type for example, the reactor described in Chapter 11, page 461, of the Chemical Equipment Handbook (edited by The Chemical Society of Japan; 1989).
- the polymerization vessel can be a multi-tube type, and it is also possible to circulate the dropped polymer and polymerize it while falling again in a wet-wall type.
- Examples of surface liquid film heat exchangers and centrifugal thin film evaporators include the devices described in the heat exchanger design handbook (Nippon Kogyo Tosho Co., Ltd .; 19974), Chapters 21 to 22. .
- the process up to the production of prepolymers from raw materials can be carried out by a patch system or a continuous system.
- the entire amount of the reactants is supplied to the reactor and reacted for a predetermined time, and then the entire amount of the reactant is transferred to the next reactor. it can.
- the reaction is performed in a continuous manner, the raw materials and the reactants can be continuously supplied to each reactor, and the reactants can be discharged continuously.
- the material of the polymerization vessel used in the method of the present invention is not particularly limited, and is usually selected from stainless steel, nickel, glass lining and the like.
- FIG. 3 shows the method of polymerizing terephthalic acid and TMG as raw materials while dropping along the guide from the holes in the perforated plate (guide contact drop polymerization process) and a vertical stirred tank type polymerization vessel.
- An example of the combination is shown below.
- a raw material mixture C containing a raw material TMG, terephthalic acid and a catalyst is supplied to an esterification reactor 11 and reacted for a predetermined time while stirring with a stirring blade 12 to obtain BHPT.
- the inside of the reactor is under an atmosphere of an inert gas such as nitrogen or an atmosphere of distilled water or TMG, and is usually controlled at around normal pressure. Distilled water, TMG, and excess nitrogen are discharged as gas D from vent 13.
- the BHPT obtained in the esterification reactor 11 is transferred by the transfer pump 14 and introduced into the first stirred tank type polymerization vessel 15, where it reacts for a predetermined time while being stirred by the stirring blades 16 to perform low polymerization.
- the inside of the polymerization vessel is under reduced pressure or in a state in which an inert gas such as nitrogen is passed. Distilled water, TMG, and excess nitrogen are discharged as gas D from vent 17.
- the prepolymer A having a low degree of polymerization obtained in the first stirred tank type polymerization vessel 15 is transferred by the transfer pump 18 and introduced into the second stirred tank type polymerization vessel 19, and is stirred by the stirring blades 20. While reacting for a predetermined time, a pre-polymer is obtained.
- the inside of the polymerization vessel is under reduced pressure or in a state in which an inert gas such as nitrogen is circulated. Distilled water, TMG and excess nitrogen are discharged as gas D from vent 21.
- the pre-polymer A obtained in the second stirred tank type polymerization vessel 19 is continuously supplied to the polymerization vessel from the raw material supply port 2 via the transfer pump 1, passes through the perforated plate 3, passes through the inside of the polymerization vessel.
- the inside of the polymerization reactor is controlled to a predetermined degree of reduced pressure, and TMG distilled from the pre-polymer and inert gas D such as nitrogen introduced from the gas supply port 6 if necessary are ventilated. It is discharged from port 7.
- the polymer B is continuously discharged from a discharge port 9 by a discharge pump 8.
- the esterification reactor 11, the first stirred tank type polymerization vessel 15 and the second stirred tank type polymerization vessel 19, the polymerization apparatus 10, piping, transfer pumps, etc. are heated by a heater or a jacket. , And is kept warm.
- FIG. 4 shows the method of polymerizing terephthalic acid and TMG as raw materials while dropping along the guide from the holes in the perforated plate (guide contact drop polymerization process), a vertical stirred tank type polymerizer and One example of a combination of horizontal stirring polymerization vessels is shown.
- a mixture C containing TMG, terephthalic acid and a catalyst, which are raw materials, is introduced into an esterification reactor 11 and reacted for a predetermined time while stirring with a stirring blade 12 to obtain BHPT.
- the inside of the reactor is under an inert gas atmosphere such as nitrogen or distilling water or TMG atmosphere, and is usually controlled at around normal pressure. Distilled water, TMG, and excess nitrogen are discharged as gas D from vent 13.
- the BHPT obtained in the esterification reactor 11 is transferred by the transfer pump 14 and introduced into the first stirred tank type polymerization reactor 15, where it reacts for a predetermined time while being stirred by the stirring blades 16, and has a low weight. Obtain a good pre-bolimer A.
- the inside of the polymerization vessel is under reduced pressure or in a state in which an inert gas such as nitrogen flows. Distilled water, TMG, and excess nitrogen are discharged as gas D from vent 17.
- the prepolymer having a low degree of polymerization obtained in the first stirred tank type polymerization vessel 15 is transferred by the transfer pump 20 and supplied to the horizontal stirring polymerization vessel 22, and is stirred while being stirred by the stirring blades 23. Reaction for time to obtain prepolymer A.
- the inside of the polymerization vessel is under reduced pressure or in a state in which an inert gas such as nitrogen flows. Distilled water, TMG and excess nitrogen are discharged as gas D from vent 24.
- the prepolymer A obtained in the horizontal stirring polymerization vessel 22 is continuously supplied to the polymerization vessel 10 from the raw material supply port 2 via the transfer pump 1, and then passes through the perforated plate 3 into the polymerization vessel. Introduced and in line with Guide 5 And fall.
- the inside of the polymerization vessel is controlled to a specified degree of pressure reduction, such as TMG distilled from the pre-polymer, and inert gas D such as nitrogen introduced from the gas supply port 6 as necessary. Is discharged from vent port 7.
- the polymer B is continuously discharged from the discharge port 9 by the discharge pump 8.
- the polymerization reactor 10, esterification reactor 11, first stirred tank polymerization reactor 15, horizontal stirring polymerization reactor 22, pipes, transfer pumps, etc. are heated all day long or by a jacket and kept warm. Have been.
- Figures 5 and 6 show examples using DMT and terephthalic acid as raw materials.
- the mixture C containing the raw materials TMG, DMT and the catalyst is introduced into the first transesterification reactor 25 and then into the second transesterification reactor 29, and is stirred for a predetermined time by the stirring blades 26 and 30 respectively. React and increase the reaction rate to obtain BHPT.
- the inside of the reactor is in an atmosphere of an inert gas such as nitrogen, or an atmosphere of methanol or TMG to be distilled out, and is usually controlled near normal pressure.
- a rectification column is installed at the end of the vent, and the distilling TMG is returned to the reactor, and methanol and excess nitrogen are discharged.
- the obtained BHPT is polycondensed in the same manner as in the apparatus shown in FIGS. 3 and 4, and becomes a prepolymer A and then a polymer B.
- the physical properties of the polymer were measured by the following methods.
- Intrinsic viscosity [? ?] Is the ratio of the specific viscosity 7? Sp in o-closed phenol to the concentration C (g / 100 milliliters) at 35 ° C using an Ostwald viscometer. 7? Sp / C was deduced to zero concentration and determined according to the following formula.
- the crystal melting point was measured using Pyris 1 DSC (input compensation type differential calorimeter) manufactured by Perkin E 1mer, USA under the following conditions, and the peak value of the endothermic peak resulting from melting of the crystal was defined as the crystal melting point. did. The peak value was determined using the attached analysis software.
- Terminal lipoxyl group concentration Dissolve 1 g of polymethylene terephthalate resin in 25 ml of benzyl alcohol, add 25 ml of black hole form, and add 1 / 50N potassium benzyl alcohol Titrate with solution, titration value VA (ml) and blank value V without polytrimethylene terephthalate resin. Therefore, it was determined according to the following equation. Terminal carboxyl group concentration (meq / kg)
- MwZMn a value obtained by dividing Mw (weight average molecular weight) by Mn (number average molecular weight) was used.
- Mw and Mn are G P C
- the pellets were crystallized by heat treatment at 100 ° C for 10 minutes, and then measured using a color computer manufactured by Suga Test Machine Co., Ltd. of Japan.
- the color tone was measured in the same manner as described above, and this was used as a coloration index during heating. However, in this case, heat treatment at 100 ° C was not performed because crystallization had already occurred.
- the measurement of the amount of the powdery polymer attached to the pellet surface was performed according to the following procedure.
- Filter 3.2 through a 30-mesh finoletter and wash repeatedly with water so that no cracked pellet or powdery polymer remains on the pellet on the filter.
- the filtrate of 4.3 is filtered again through a 300-mesh filter.
- the filter residue on the filter is dried under reduced pressure at 80 ° (: IkPa), and the weight is measured to determine the weight of the powdery polymer.
- Pre-polymer A is supplied to the polymerization reactor 10 from the raw material supply port 2 by the transfer pump 1 through the raw material supply port 2, and hits each hole from the hole of the perforated plate 3 in a molten state at 260 ° C. After discharging in the amount of 10 g Z, polymerize at a reduced pressure of 10 Pa while following guide 5 at the same ambient temperature as the discharge temperature, and discharge from discharge port 9 by discharge pump 8.
- the resin was extracted to obtain a polymethylene terephthalate resin B.
- the perforated plate had a thickness of 50 mm, and nine holes each having a diameter of 1 mm were arranged in a lattice pattern.
- the guide used was a stainless steel wire with a circular cross section of 3 mm in diameter and 5 m in length. Guide 5 was attached to each hole of perforated plate 4.
- the discharge pump was operated while monitoring from the observation window 4 so that almost no polymer was accumulated at the bottom of the polymerization vessel.
- the prepolymer was composed of 0.1 wt% of titanate lab toxide / 100 wt% of prepolymer and trimethylphosphoric acid as 100 ppm by weight of the phosphorus element. 03 07567
- the residence time at this time was 60 minutes.
- the residence time is a value obtained by dividing the amount of the polymer in the polymerization vessel by the supply amount.
- the residence time is a value obtained by dividing the amount of the polymer in the polymerization vessel by the supply amount.
- the resulting poly (trimethylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, a low terminal carboxyl group concentration, and a good color tone.
- a homogeneous polytrimethylene terephthalate resin there was little coloring due to heating.
- the obtained poly (trimethylene terephthalate) resin was put into cold water of 5 ° C, solidified, and then cut to obtain 2 O mg Z pellets.
- the pellets were as low as 0.01 wt% and had a low crystallinity of 5%, making them difficult to crack and easy to handle. Examples 2 to 4
- Example 6 Polymerization was carried out in the same manner as in Example 1 except that a guide having a shape of a jungle gym in which a wire having a diameter of 3 mm was combined at an interval of 3 O mm in the vertical direction and 50 mm in the horizontal direction was used. . At this time, the vertical wire was attached to the hole of the perforated plate. result Are shown in Table 1. The contamination of the base surface due to vigorous foaming under the spinning is small, and the obtained polytrimethylene terephthalate resin has a very high degree of polymerization, good color tone, and is homogeneous. It was late-night resin. In addition, there was little coloring by heating.
- Example 6 Example 6
- Example 7 The polymerization was carried out in the same manner as in Example 1 except that a 3 mm diameter wire was used as a guide, and the wire was a grid of 3 O mm in the vertical direction and 5 O mm in the horizontal direction. went. At this time, the vertical wires were attached to the holes of the perforated plate. Table 1 shows the results. The contamination of the die surface by vigorous foaming under the spinning is small, and the obtained poly (methylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, a low terminal carboxyl group concentration, and a good color tone. Moreover, it was a homogeneous polymethylene terephthalate resin. In addition, there was little coloring due to heating.
- Example 7 Example 7
- the prepolymer supplied to the final polymerizer is within the scope of the present invention, and the resulting poly (methylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, and a low end force lipoxyl. It was a homogeneous polytrimethylene terephthalate resin having a base concentration and a good color tone. In addition, there was little coloring due to heating.
- the polymerization is carried out with terephthalic acid and TMG in a molar ratio of 1: 1.5, A mixture (slurry) C containing 0.1% by weight of titanate laboxide relative to terephthalic acid was continuously charged into the esterification reactor. The procedure was performed in the same manner as in Example 1 to obtain polytrimethylene terephthalate resin. At this time, 20 ppm / polymer of trimethyl phosphate was continuously added to the first stirred polymerization reactor 15. Table 1 shows the results.
- the prepolymer A supplied to the final polymerization reactor 10 is within the scope of the present invention, and the obtained poly (trimethylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, and a low terminal force. It was a homogeneous polymethylene terephthalate resin having a rugoxyl group concentration, good color tone, and uniformity. In addition, there was little coloring due to heating.
- the resin was a homogeneous polytrimethylene terephthalate resin having a carboxyl group concentration and a good color tone. Also, there was little coloring due to heating.
- the obtained polyethylene methylene terephate resin was solidified in cold water at 5 ° C, and then cut to obtain 2 O mg Z pellets. The pellets were as low as 0.01 wt% and had a low crystallinity of 5%, making them difficult to crack and easy to handle.
- Example 1 Polymerization was carried out under the conditions of Tables 1 and 4 in the same manner as in Example 9 except that the amount of nitrogen E shown in Table 1 was introduced from the gas supply port 6 of the polymerization vessel 10. A ethylene terephthalate resin was obtained. Table 1 shows the results. Prepolymer supplied to final polymerization unit 10 The polymer A is within the scope of the present invention, and the obtained polymethylene terephthalate resin B has a high degree of polymerization, a narrow molecular weight distribution, a low terminal carboxyl group concentration, and a good color tone. It was a homogeneous polytrimethylene terephthalate resin. In addition, there was little coloring due to heating. Example 1 1
- Example 13 was a chain shape in which ellipses having a wire diameter of 3 mm, a length of 5 O mm, and a curvature of 20 mm ⁇ were connected, and Example 14 had a diameter of 2
- the apparatus shown in FIG. 6 was used in the same manner as in Example 12 except that a disk having a diameter of 5 ⁇ was used in which a disc having a thickness of 0 mm and a thickness of 3 mm was welded every 200 mm. Then, polymerization was performed under the conditions shown in Tables 1 and 6 to obtain a poly (trimethylene terephthalate) resin. Table 1 shows the results.
- the prepolymer ⁇ supplied to the final polymerization reactor 10 is within the scope of the present invention, and the obtained poly (trimethylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, a low terminal lipoxyl group concentration, It was a homogeneous polytrimethylene terephthalate resin having a good color tone. In addition, there was little coloring due to heating. Comparative Example 5
- pellets obtained by solidifying the prepolymer obtained in Example 13 in cold water at 5 ° C. and then cutting the pellets were dried at 120 ° C. 7567
- Example 15 Polymerization was carried out under the conditions of Tables 1 and 7 in the same manner as in Example 12 except that the amount of the polymer was reduced to about 75 kg per day, and the polymerizer 10 was not used. A terephthalate resin was obtained. Table 1 shows the results. The obtained polytrimethylene terephthalate resin could not have a high degree of polymerization, had a wide molecular weight distribution, a high terminal carboxyl group concentration, and was greatly colored by heating.
- Example 15 Example 15
- the system shown in Fig. 2 was used to introduce the inert gas into the polymerization reactor using the inert gas absorption device N1, and the system shown in Table 1 was used. Polymerization was carried out in the same manner as in Example 1 except for the above conditions.
- the perforated plate N 4 of the inert gas absorber N 1 has nine grids of 1 mm diameter arranged in a grid, and the guide N 5 is made of stainless steel with a circular cross section of 5 mm diameter and 3 m length. One wire was used.
- One guide was attached to each hole of the perforated plate. Nitrogen gas was supplied to the inside of the absorber so that the pressure became 0.11 Pa, and nitrogen was absorbed and contained in the pre-polymer N 5 ′ falling along the guide N 5.
- the transfer pump was operated while monitoring that almost no polymer was accumulated at the bottom of the absorber. At this time, fine bubbles were present in the pre-polymer A transferred from the absorber N 1.
- a pressure change corresponding to 0.5 mg of gas per 1 g of polymer was found. This amount was considered to be the amount of nitrogen gas absorbed and contained in the prepolymer, and the amount of nitrogen introduced into the polymerization reactor was determined assuming that the entire amount was introduced into the polymerization reactor.
- Table 1 shows the polymerization results. At this time, when observed from the lower observation window 4, the falling polymer was in a foaming state containing a large amount of foam.
- the polytrimethylene terephthalate resin was a homogeneous polytrimethylene terephthalate resin having a high degree of polymerization, a narrow molecular weight distribution, a low terminal lipoxyl group concentration, and a good color tone. In addition, there was little coloring due to heating.
- Example 16 Example 9 was replaced with a polymerization vessel in which the guide 5 of the polymerization vessel 10 was removed and the polymerization was performed while freely falling through the holes of the perforated plate 3 instead of the second stirred tank polymerization vessel. Polymerization was carried out in the same manner as in Example 1 under the conditions shown in Tables 1 and 4 to obtain a poly (methylene terephthalate) resin.
- the apparatus for polymerizing while being freely dropped from the holes of the perforated plate 3 was operated at a temperature of 260 ° C. and a pressure of 100 Pa. Table 1 shows the results.
- the prepolymer A supplied to the final polymerization vessel 10 is within the scope of the present invention, and the obtained poly (trimethylene terephthalate) resin has a high degree of polymerization, a narrow molecular weight distribution, a low terminal carboxyl group concentration, It was a homogeneous polytrimethylene terephthalate resin having a good color tone. In addition, there was little coloring due to heating.
- a flat plate was attached vertically as guide 5 of polymerization vessel 10, and pre-bolizer A discharged from four linearly arranged holes was placed along the flat plate.
- the polymerization was carried out under the conditions of Tables 1 and 4 in the same manner as in Example 9 except that a thin-film polymerization vessel was used in which polymerization was carried out while falling into a thin film and falling. A resin was obtained.
- the thin-film polymerizer was operated at a temperature of 260 ° C and a pressure of 10 OPa. Table 1 shows the results.
- the prepolymer A supplied to the final polymerization reactor 10 is within the scope of the present invention, and the obtained polymethylene is obtained.
- the NTB resin B had a high degree of polymerization, a narrow molecular weight distribution, a low terminal lipoxyl group concentration, a good color tone, and was a homogeneous PTT composition. Also, there was little coloring due to heating.
- Intrinsic viscosity Intrinsic viscosity of reactant discharged from each reactor Table 6
- Intrinsic viscosity Intrinsic viscosity of reactants discharged from each reactor
- the poly (trimethylene terephthalate) resin of the present invention can be produced industrially stably without solid-phase polymerization, and has an appropriate range of intrinsic viscosity, molecular weight distribution, and excellent color tone. It can be used for industrially stable production of fibers and molded articles having high strength and color tone.
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
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- Polyesters Or Polycarbonates (AREA)
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Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
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KR1020047018767A KR100684683B1 (ko) | 2002-06-13 | 2003-06-13 | 폴리트리메틸렌 테레프탈레이트 수지 |
DE60318028T DE60318028T2 (de) | 2002-06-13 | 2003-06-13 | Polytrimethylenterephthalatharz |
CA2483579A CA2483579C (en) | 2002-06-13 | 2003-06-13 | Polytrimethylene terephthalate resin |
AU2003241654A AU2003241654A1 (en) | 2002-06-13 | 2003-06-13 | Polytrimethylene terephthalate resin |
MXPA04011430A MXPA04011430A (es) | 2002-06-13 | 2003-06-13 | Resina de tereftalato de politrimetileno. |
EP03736202A EP1491569B1 (en) | 2002-06-13 | 2003-06-13 | Polytrimethylene terephthalate resin |
US10/512,467 US7198846B2 (en) | 2002-06-13 | 2003-06-13 | Polytrimethylene terephthalate resin |
BR0311125-3A BR0311125A (pt) | 2002-06-13 | 2003-06-13 | Resina de tereftalato de politrimetileno e método para produzir a mesma |
JP2004513357A JP4229240B2 (ja) | 2002-06-13 | 2003-06-13 | ポリトリメチレンテレフタレート樹脂 |
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JP2002-172735 | 2002-06-13 | ||
JP2002172735 | 2002-06-13 |
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US (1) | US7198846B2 (ja) |
EP (1) | EP1491569B1 (ja) |
JP (1) | JP4229240B2 (ja) |
KR (1) | KR100684683B1 (ja) |
CN (1) | CN1308368C (ja) |
AT (1) | ATE380835T1 (ja) |
AU (1) | AU2003241654A1 (ja) |
BR (1) | BR0311125A (ja) |
CA (1) | CA2483579C (ja) |
DE (1) | DE60318028T2 (ja) |
ES (1) | ES2294297T3 (ja) |
MX (1) | MXPA04011430A (ja) |
RU (1) | RU2282639C2 (ja) |
TW (1) | TWI252241B (ja) |
WO (1) | WO2003106530A1 (ja) |
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EP1904552A1 (en) * | 2005-07-15 | 2008-04-02 | DSMIP Assets B.V. | Polycondensate fibers |
US7932345B2 (en) * | 2005-09-16 | 2011-04-26 | Grupo Petrotemex, S.A. De C.V. | Aluminum containing polyester polymers having low acetaldehyde generation rates |
CN100396711C (zh) * | 2006-06-28 | 2008-06-25 | 常熟市长江化纤有限公司 | 用作制备聚乳酸的聚合装置 |
TW200833705A (en) * | 2006-11-15 | 2008-08-16 | Shell Int Research | Polymer composition containing flame retardant and process for producing the same |
US8901272B2 (en) * | 2007-02-02 | 2014-12-02 | Grupo Petrotemex, S.A. De C.V. | Polyester polymers with low acetaldehyde generation rates and high vinyl ends concentration |
US20090152761A1 (en) * | 2007-12-12 | 2009-06-18 | Sam Louis Samuels | Process for preparation of modified poly |
WO2011062600A1 (en) * | 2009-11-19 | 2011-05-26 | E. I. Du Pont De Nemours And Company | Polycondensation with a kneader reactor |
JP5658906B2 (ja) * | 2010-04-28 | 2015-01-28 | 株式会社日立製作所 | ポリトリメチレンテレフタレートの製造方法及び製造装置 |
DE102011089056A1 (de) * | 2011-12-19 | 2013-06-20 | Evonik Industries Ag | Verfahren zur Herstellung von Polyestern |
RU2696456C2 (ru) | 2015-03-23 | 2019-08-01 | Некст Дженерейшн Рисайклингмашинен Гмбх | Установка, а также способ для обработки полимерного расплава |
WO2018085628A1 (en) * | 2016-11-03 | 2018-05-11 | The Coca-Cola Company | Acrolein scavenging in ptf and other 1,3-propanediol derived polymers |
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EP1491569A4 (en) | 2006-03-29 |
AU2003241654A1 (en) | 2003-12-31 |
CN1308368C (zh) | 2007-04-04 |
KR100684683B1 (ko) | 2007-02-22 |
CA2483579A1 (en) | 2003-12-24 |
ES2294297T3 (es) | 2008-04-01 |
TWI252241B (en) | 2006-04-01 |
BR0311125A (pt) | 2005-02-22 |
CA2483579C (en) | 2010-04-13 |
US7198846B2 (en) | 2007-04-03 |
DE60318028T2 (de) | 2008-11-27 |
DE60318028D1 (en) | 2008-01-24 |
RU2282639C2 (ru) | 2006-08-27 |
EP1491569B1 (en) | 2007-12-12 |
EP1491569A1 (en) | 2004-12-29 |
RU2004133899A (ru) | 2005-06-10 |
TW200403275A (en) | 2004-03-01 |
ATE380835T1 (de) | 2007-12-15 |
JP4229240B2 (ja) | 2009-02-25 |
US20060058497A1 (en) | 2006-03-16 |
JPWO2003106530A1 (ja) | 2005-10-13 |
CN1659206A (zh) | 2005-08-24 |
MXPA04011430A (es) | 2005-02-14 |
KR20050004176A (ko) | 2005-01-12 |
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