WO2002059178A1 - Resine polyester, article moule a base de cette resine polyester et procede permettant de produire cette resine polyester - Google Patents
Resine polyester, article moule a base de cette resine polyester et procede permettant de produire cette resine polyester Download PDFInfo
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- WO2002059178A1 WO2002059178A1 PCT/JP2002/000562 JP0200562W WO02059178A1 WO 2002059178 A1 WO2002059178 A1 WO 2002059178A1 JP 0200562 W JP0200562 W JP 0200562W WO 02059178 A1 WO02059178 A1 WO 02059178A1
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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
- C08G63/86—Germanium, antimony, 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
- C08G63/78—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
- C08G63/86—Germanium, antimony, or compounds thereof
- C08G63/866—Antimony or compounds thereof
-
- 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
-
- 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
- C08G63/87—Non-metals or inter-compounds thereof
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
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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
- Y10T428/249921—Web or sheet containing structurally defined element or component
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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
- Y10T428/2913—Rod, strand, filament or fiber
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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
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31786—Of polyester [e.g., alkyd, etc.]
Definitions
- Polyester resin molded article made of it, and method for producing polyester resin
- the present invention relates to a polyester resin polycondensed in the presence of an antimony compound and used for molding bottles, films, sheets, fibers, and the like, and a method for producing the same. More specifically, antimony dissolution at the time of contact with water, solvent, etc., such as the post-treatment step after polycondensation, the dyeing step after polyester fiber processing, and the filling of contents using as a polyester container, etc. It relates to a polyester resin whose amount is suppressed. Background art
- polyester resins such as polyethylene terephthalate resin have excellent mechanical strength, chemical stability, gas barrier properties, sanitary properties, etc., and are relatively inexpensive and lightweight. Widely used as packaging materials or fibers.
- polyester resins are mainly produced using an antimony compound as a polycondensation catalyst, but the antimony compound or metal antimony remaining in the resin is brought into contact with water, for example, cooling after polycondensation, Alternatively, there is a concern about the problem of elution in the process of contacting with a solvent such as dyeing after fiber processing, causing environmental pollution. In addition, there is concern about the possibility of elution from containers during the process of contacting with hot water, such as heat sterilization and filling, as packaging materials for containers, etc., and use of titanium compounds instead of antimony compounds as polycondensation catalysts.
- Various polyester resins produced by using a titanium compound in combination or the like have been proposed.
- the amount of these by-products in the polyester resin increases due to a decrease in the color tone of the polyester resin or by-products such as acetoaldehyde diethylene dalicol, or the amount of antimony eluted from the polyester resin is sufficiently suppressed. No, there was a problem.
- a polyester resin or the like is used as a hollow container for beverages, for example, it is used for non-carbonated beverages such as minerals, tea and juice, and for carbonated beverages. It has been. Regardless of whether it is non-carbonated or carbonated, there are two types of beverage filling methods: non-heated aseptic filling and heat-sterilized filling.
- polyester resins obtained using an antimony compound as a catalyst have a high crystallization rate and tend to have poor transparency. Therefore, particularly when used as a hollow container for non-carbonated beverages, a polyester resin with excellent transparency is used.
- a small amount of diethylene glycol / isophthalic acid is copolymerized and the molecular weight (typically represented by intrinsic viscosity) of the resin is set relatively high, and the crystallization rate is moderately suppressed. It is common to do.
- oriented crystallization does not proceed sufficiently during molding, and it is not possible to efficiently obtain a molded product with sufficient heat resistance and strength.
- a conventional polyester resin obtained by using an antimony compound as a catalyst has a high crystallization rate, it is common to copolymerize a considerable amount of diethylene glycol as described above. This improves transparency when used as a container, but especially when used as a bottle for carbonated beverages, which is distributed under stress caused by the internal pressure of the content beverage, environmental temperature, chemicals, solvents, etc. There is a problem that cracks are likely to occur due to the above external factors.
- the conventional polyester resin obtained by using an antimony compound as a catalyst has a too high crystallization rate, and when a bottle obtained by molding the polyester resin is used particularly for heat sterilization and filling, a pre-formed body at the time of the pot molding is used.
- an antimony compound a titanium compound or a germanium compound, as well as a magnesium compound and a phosphorus compound, etc., as a polycondensation catalyst
- the condensation catalyst is recognized in any case, but it takes time for the heat treatment at the time of forming the pottle, and also the localization occurs between the inside and outside of the stopper part. It has been found that there is a problem that the dimensional accuracy of the stopper part becomes unstable due to a significant difference in crystallinity.
- the conventional polyester resin obtained using an antimony compound as a catalyst has a too high crystallization rate, and is melt-plasticized at a high molding temperature during injection molding of a preform when molding a port. After that, it is necessary to maintain the transparency by injection quenching into the mold to maintain the transparency, and the molding temperature must be high. As a result, by-products such as acetoaldehyde and cyclic oligomers are contained in the resin after molding. And the acetate aldehyde adversely affects the flavor of the contents when the bottle is used, and the cyclic monomer contaminates the blow mold and increases productivity for mold cleaning. There were problems such as drastic reduction.
- thermoplastic polyester resin comprising a dicarboxylic acid component and an alkylene glycol component, a mixture of an antimony compound and a titanium compound as a polycondensation catalyst
- a method for producing a thermoplastic polyester resin characterized by using one or more compounds selected from a compound and an alkaline earth metal compound is disclosed.
- a polyester resin characterized in that the molded article having a thickness of 4 mm has a haze of 3.0% or less, and the molded article having a thickness of 5 mm has a haze of 15.0% or less.
- Patent 0 3 0 8 1 1 0 4 discloses that aliphatic diglycols are mainly composed of aromatic dicarboxylic acids.
- a film-forming polyester containing, as a main glycol component, a content of metal-containing precipitated particles of 0.01% by weight or less (based on polyester) by a catalyst used in the synthesis of the polyester, and the catalyst Discloses a polyester comprising a titanium compound or a titanium compound and an antimony compound, and the amounts of these metal elements satisfy a specific range.
- JP 2000-219726, JP 2000-219730, JP 2000-226 444, JP 2000-226445, JP 2000-226446, JP 2000-226500, Sb and Ti or Polyester containing / and Ge as a catalyst and having a specific range of density and density increase rate are disclosed.
- the elution amount of antimony is not sufficiently suppressed, and the polymerizability and productivity of the polyester resin are poor.
- the present invention has been made in view of the above-mentioned prior art, and is a polyester resin polycondensed in the presence of an antimony compound, a polyester resin in which the amount of antimony eluted is suppressed, and a method for producing such a polyester resin.
- An object of the present invention is to provide a method for producing a polyester resin which can be obtained with good polymerizability and productivity. Disclosure of the invention
- the present invention has been made to achieve the above object, that is, the present invention provides a dicarboxylic acid component containing aromatic dicarboxylic acid or an ester-forming derivative thereof as a main component, and ethylene glycol as a main component.
- a polyester resin produced by subjecting at least an antimony compound and a phosphorus compound to polycondensation with a diol component which undergoes an esterification reaction or a transesterification reaction, wherein the granular material has a number average particle weight of 24 mg.
- the amount of antimony eluted when immersed in 95X hot water for 60 minutes is 1 g or less as antimony atoms (Sb) per 1 g of polyester resin. (Referred to as' ester ⁇ ⁇ )
- One of the preferred embodiments of the present invention is a polyester II, wherein the ethylene glycol component is at least 96 mol% of the total glycol component, the diethylene glycol component is at most 2.5 mol% of the total glycol component, and the terephthalic acid component is at least 2.5 mol%. 98.5 mol% or more of the total acid component, a polyester resin having an intrinsic viscosity IV of 0.65 to 1.0 d 1 / g, and a crystallization temperature Tc 2 of 150 to 200: (Referred to as 2).
- the crystallization rate is low despite the low copolymerization amount and low intrinsic viscosity, and excellent transparency, heat resistance, and strength are obtained when a container such as a bottle is used.
- Containers can be obtained with high productivity, and are particularly suitable for hollow containers for non-carbonated beverages such as mineral water, tea and juice.
- polyester 3 Another preferred embodiment of the present invention is a polyester, wherein an ethylene terephthalate unit is a main repeating structural unit and satisfies the following characteristics (1), (2), and (3). Polyester resin (hereinafter referred to as polyester 3).
- the heated crystallization temperature (Tel) after forming the molded body is 155 ° C or more, and the cooled crystallization temperature (T c2 ) is 180 or less or is not observed.
- transparency, strength, resistance to flavor deterioration of content beverages and the like, and resistance to environmental stress cracking are particularly good, and it is particularly suitable for potters for carbonated beverages.
- polyester (1) or (3) which contains a polyolefin resin or a polyamide resin in an amount of 0.0001 to 1000 ppm, and has a heated crystallization temperature after forming a molded article.
- T el is a polyester resin (hereinafter referred to as polyester II ) characterized by having a crystallization temperature (T e 2 ) of 155 to 165 and a falling crystallization temperature (T e 2 ) of 180 ° C or lower or not observed. .
- the crystallization speed of the stopper portion is high without lowering the transparency of the body portion, the productivity of the hollow container is excellent, and the stopper portion of the stopper portion is excellent.
- the stopper portion of the stopper portion is excellent.
- Another preferred embodiment of the present invention is a polyester, wherein a haze of a 5 mm thick portion in the molded body after injection molding at 270 ° C. is 50% or less. It is a polyester resin (hereinafter, referred to as polyester II).
- molding can be performed without impairing transparency even at a molding temperature lower than before, generation of acetoaldehyde during molding and mold contamination during molding are suppressed, and transparency is reduced. It is suitable for hollow containers regardless of whether it is for non-carbonated, carbonic, non-heated aseptic filling, or heat sterilized filling.
- polyester resin characterized in that the number of particles of 1 m or more inside the resin is 20 or less and 0.0 lmm 3 or less (hereinafter, polyester resin).
- polyester resin the number of particles inside the resin is very small, and when forming a fiber or a film, almost no thread breakage or film breakage due to the particles occurs, and when a film is formed, There are almost no projections such as fish fish that are generated, and it is suitable for fibers and films.
- another gist of the present invention is to provide a polyester obtained by polycondensing a dicarboxylic acid component mainly containing an aromatic dicarboxylic acid or an ester-forming derivative thereof and a diol component mainly containing ethylene dalicol.
- a method for producing a resin comprising adding a catalyst to a reaction system so that each atom derived from a polymerization catalyst is contained in the following concentration range with respect to the obtained polyester resin.
- T is the total concentration (ppm) of at least one metal atom selected from the group consisting of titanium, hafnium, and zirconium atoms in the resin
- Sb is the concentration of antimony atom in the resin.
- P pm P is the concentration of phosphorus atoms in the resin (p pm)
- the polyester resin of the present invention in which the elution of antimony is suppressed is used.
- Polymerizability ⁇ It can be manufactured with good productivity.
- FIG. 1 (a) is a plan view and (b) is a front view of a stepped plate for property evaluation molded in Example.
- Figure 2 An example of an apparatus for producing polyester by the method of the present invention.
- the polyester resin in the present invention is obtained by subjecting a dicarboxylic acid component mainly composed of an aromatic dicarboxylic acid or an ester-forming derivative thereof to a diol component mainly composed of ethylene dalicol through an esterification reaction or a transesterification reaction. It is produced by polycondensation in the presence of at least an antimony compound and a phosphoric compound.
- aromatic dicarboxylic acid or the ester-forming derivative thereof specifically, for example, terephthalic acid, phthalic acid, isophthalic acid, diisobutyric acid, sodium sulfoisophthalate, phenylenedioxy acid Dicarboxylic acid, 4, 4 'diphenyl dicarboxylic acid, 4, 4' diphenyl ether dicarboxylic acid, 4, 4,-diphenyl ketone dicarboxylic acid, 4, 4 'diphenyl ethane dicarboxylic acid, 4, 4' Diphenylsulfondicarboxylic acid, 2,6-naphthalenedicarboxylic acid, and dimethyl terephthalate Esters, alkyl esters of about 1 to 4 carbon atoms of these aromatic dicarboxylic acids, such as dimethyl ester of 2,6-naphthalenedicarboxylic acid, and halides; and terephthalic acid, 2,6 —Naphthalened
- the dicarboxylic acid components other than the aromatic dicarboxylic acid and the ester-forming derivative thereof include, for example, alicyclic dicarboxylic acids such as hexahydroterephthalic acid and hexahydroisofuric acid, and succinic acid.
- alicyclic dicarboxylic acids such as hexahydroterephthalic acid and hexahydroisofuric acid, and succinic acid.
- alkyl esters having about 1 to 4 carbon atoms, and halides.
- diol components other than ethylene glycol include, for example, trimethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol. Octamethylene glycol, decamethylene glycol, neopentyl diol.
- 2-Ethyl-2-butyl-1,3-propanediol aliphatic diols such as diethylene glycol, polyethylene glycol, polytetramethylene ether terdaricol, 1,2-cyclohexanediol, 1,4-cyclohexanediol Alicyclic diols such as 1,1,1-cyclohexane dimethylol, 1,4-cyclohexane dimethylol, 2,5-norbornane dimethylol, and xylylene diol, 4,4,1-dihydroxybiphenyl, 2 , 2-bis (4, Aromatic diols such as propenyl, 2,2-bis (4,1-hydroxyethoxyphenyl) propane, bis (4-hydroxydiphenyl) sulfone, bis (4-1j8-hydroxyethoxyphenyl) sulfonic acid, and the like; And ethylene oxide adducts and propylene oxide adducts of
- hydroxycarboxylic acids and alkoxycarboxylic acids such as glycolic acid, p-hydroxybenzoic acid, P- / 3-hydroxyethoxybenzoic acid, and stearyl alcohol, benzyl alcohol, stearic acid, benzoic acid, t —Monofunctional components such as butylbenzoic acid, benzoylbenzoic acid, etc., trimethylvalivalic acid, trimellitic acid, trimesic acid, pyromellitic acid, gallic acid, trimethicone-lurethane, trimethylolpropane, glycerol, pen One or two or more trifunctional or higher polyfunctional components such as taerythritol may be used as the copolymer component.
- the aromatic dicarboxylic acid or its ester-forming derivative is used in an amount of 50 mol% or more, preferably 90 mol%, of the dicarboxylic acid component.
- the dicarboxylic acid component accounts for at least 95 mol%, more preferably at least 99 mol%, and ethylene glycol at least 50 mol%, preferably at least 90 mol%, more preferably at least 90 mol%, of the diol component. It is produced by polycondensing a diol component occupying 5 mol% or more, particularly preferably 97 mol% or more, through an esterification reaction or a transesterification reaction.
- the polyester resin may be copolymerized with by-product ethylene glycol in the reaction system.
- the content of diethylene glycol including the component added from outside the system as a copolymer component is 5 mol% or less. Preferably it is.
- the degree of suppression of the amount of antimony eluted as a polyester resin tends to decrease, and the melt heat stability, heat resistance, and mechanical strength of the resin tend to decrease.
- the polycondensation is performed in the presence of at least an antimony compound and a phosphorus compound.
- the polyester resin of the present invention contains at least an antimony component and a phosphorus component.
- antimony compound examples include antimony trioxide, antimony pentoxide, antimony acetate, methoxyantimony, trifenylantimony, antimony glycolate, and the like. preferable.
- the phosphorus compound include orthophosphoric acid, polyphosphoric acid, and esters thereof, for example, trimethyl phosphate, triethyl phosphate, tri-n-butyl phosphate, trioctyl phosphate, and triphenyl.
- Pentavalent phosphorus compounds such as ethates, hypophosphorous acid, phosphorous acid, and esters thereof, for example, dimethyl phosphite, getyl phosphite, trimethyl phosphite, triethyl phosphite, tributyl phosphite, tris decyl phosphite
- trivalent phosphorus compounds such as phyto, tris noel decyl phosphite, diphenyl phosphite, triphenyl phosphi
- a pentavalent phosphorus compound such as orthophosphoric esters such as ethyl acid phosphate, hypophosphorous acid, phosphorous acid, and getyl phosphite, trimethyl phosphite, and triethyl phosphite
- Trivalent phosphorus compounds such as phosphites such as tyl phosphite are preferred, and trivalent phosphorus compounds such as phosphite and phosphites are particularly preferred.
- the amount of each of the antimony compound and the phosphorus compound used in the polycondensation during the polycondensation, and the respective contents of the resulting polyester resin are further reduced from the viewpoint of suppressing the amount of antimony eluted in the polyester resin.
- the content of the antimony component as an antimony atom (Sb) is preferably 10 to 250 ppm by weight, more preferably 30 to 150 ppm by weight, and 50 to 110 ppm. Particularly preferred is ppm by weight. If the content as an antimony atom is less than the above range, the polymerizability will be insufficient and the productivity will be reduced, the color tone will also be reduced, and by-products will tend to increase. It tends to be difficult to control the amount.
- the content of the phosphorus component in the polyester resin as a phosphorus atom (P) is preferably relatively small, from 0.1 to 20 ppm by weight.
- the content is more preferably from 1.0 to 15 ppm by weight, particularly preferably from 2.0 to 10 ppm by weight.
- the content as a phosphorus atom is less than the above range, the color tone tends to decrease and by-products tend to increase.
- the content exceeds the above range, it tends to be difficult to suppress the elution amount.
- the ratio (SbZP) of the content (weight ppm) of the antimony component as antimony atoms (Sb) in the polyester resin to the content (weight ppm) as phosphorus atoms (P) of the phosphorus component is From the viewpoint of suppressing the elution amount of antimony, it is preferably 6.0 to 30; It is more preferably from 8 to 20 and particularly preferably from 9 to 15. If the ratio of the content as an antimony atom to the content as a phosphorus atom is less than the above range, polycondensability will be insufficient, resulting in a decrease in productivity, a decrease in color tone, and an increase in by-products. On the other hand, when the above range is exceeded, it tends to be difficult to suppress the elution amount.
- the polyester resin of the present invention from the viewpoint of further suppressing the elution amount of antimony, the polycondensation is carried out by group 1A, group IIA of the periodic table, zinc, aluminum, gallium, germanium, titanium, zirconium, It is preferably made in the presence of a compound of at least one metal element selected from the group consisting of hafnium, manganese, iron, and cobalt.
- the polyester resin of the present invention Table 1A, IIA, zinc, aluminum, gallium, germanium, titanium, zirconium, hafnium, manganese, iron, and at least one metal element selected from the group consisting of iron and cobalt Is preferred.
- the total amount of these metal compounds used during polycondensation, and the total content thereof in the polyester resin are determined by the amount of those metal elements in the polyester resin.
- the total content of the components as metal atoms (M) is preferably 0.1 to 100 ppm by weight, more preferably 1 to 30 ppm by weight.
- Examples of the coexisting metal compounds include, for example, lithium, sodium, potassium and the like of Group 1A of the periodic table, beryllium, magnesium, calcium, strontium, parium and the like of Group IIA, and zinc, aluminum, gallium, Examples include oxides, hydroxides, alkoxides, carbonates, carbonates, oxalates, and halides of germanium, titanium, zirconium, hafnium, manganese, iron, and cobalt.
- magnesium compounds of Group 1A and Group IIA of the periodic table especially magnesium compounds are preferable.
- the magnesium compound include magnesium oxide, magnesium hydroxide, magnesium alkoxide, magnesium acetate, magnesium carbonate, and the like. Of these, magnesium acetate is preferable.
- the amount of magnesium compound used during polycondensation and the accompanying W content in the polyester resin are determined as magnesium atoms (Mg) in the polyester component in the polyester resin from the viewpoint of further suppressing the elution amount of antimony.
- the content as magnesium atom is less than the above range, it tends to be difficult to suppress the elution amount.
- the content is more than the above range, the color tone tends to decrease and the by-product tends to increase.
- the content (weight ppm) of the magnesium component in the polyester resin as a magnesium atom (Mg) and the phosphorus content of the phosphorus component are considered from the viewpoint of further suppressing the elution amount of antimony.
- the ratio (MgZP) to the content (weight ppm) as the atom (P) is preferably 1.1 to 3.0, more preferably 1.3 to 2.5 weight ppm. It is particularly preferable that the ratio is 1.5 to 2.0.
- the ratio of the content as magnesium atoms to the content as phosphorus atoms is less than the above range, it tends to be difficult to suppress the amount of elution, while if the ratio is more than the above range, the color tone will decrease and the by-products will decrease. Also tends to increase.
- a titanium compound is also preferable among these coexisting metal compounds, and in particular, a metal compound of Group 1A or Group IA of the periodic table,
- the titanium compound is preferably used in combination with the group IIA magnesium compound.
- Specific examples of the titanium compound include tetra-n-propyl titanate, tetra-i-propyl titanate, tetra-n-butyl titanate, and tetra-n-butyl titanate tetramer.
- the amount of the titanium compound used in the polycondensation and the content in the polyester resin accompanying the polycondensation are determined from the viewpoint of further suppressing the elution amount of antimony as titanium atoms (T i) of the titanium component in the polyester resin.
- the content is preferably from 0.25 to 10 wt ppm, more preferably from 0.75 to 5.0 wt ppm, and more preferably from 1.5 to 4.0 wt ppm. Is particularly preferred. If the content of titanium atoms is less than the above range, the degree of suppression of the elution amount tends to decrease, while if the content exceeds the above range, the color tone tends to decrease and by-products also tend to increase.
- Examples of other coexisting metal compounds include, for example, compounds of metals of Group A of the periodic table such as lithium acetate, sodium acetate, and potassium acetate, calcium oxide, calcium hydroxide, calcium acetate, and the like.
- Group IIA metal compounds such as calcium carbonate, zinc acetate, zinc benzoate, zinc methoxide, zinc acetyl acetate, zinc compounds such as zinc chloride, germanium dioxide, germanium tetroxide, hydroxide
- Manganese compounds such as germanium, germanium tetraethoxide, germanium tetrabutoxide, germanium oxalate, manganese oxide, manganese hydroxide, manganese methoxide, manganese acetate, manganese benzoate, manganese acetyl acetate, manganese chloride , Kobalt formate, Cobalt, cobalt stearate, cobalt naphthenate, cobalt benzoate, cobalt ⁇ cet
- the polyester resin of the present invention is characterized in that the amount of antimony eluted when immersed in hot water of 95 t: for 60 minutes as a granular material having a number average particle weight of 24 mg is expressed as a polyester resin as an antimony atom (Sb). It is not more than 1 ⁇ g per g, preferably not more than 0.5 g, more preferably not more than 0.2 g, particularly preferably not more than 0.1 X g.
- the elution amount as antimony atom was determined by heating 50 g of polyester resin granules having a number average particle weight of 24 mg at 120 ° C for 10 hours to crystallize, and then heating at 95 ° C. Immersion in 150 g of water for 60 minutes, antimony extracted at that time was measured by inductively coupled plasma mass spectrometry as antimony atomic concentration C (ppb). Calculated elution amount D (ng) as atom It is.
- the polyester resin of the present invention has an intrinsic viscosity of [7]] (provided that it is measured at 30 "C with a solution of a mixed solvent of phenol Z tetrachloroethane (weight ratio 1/1)).
- the melt polycondensation resin it is usually 0.35 to 0.75 dl Zg, and in the case of the solid phase polycondensation resin, it is preferably 0.70 to: L. 0 d 1 / g. It is more preferably from 0.70 to 0.90 d1, particularly preferably from 0.70 to 0.80 d1 Zg, and the color tone is L as described in Reference 1 of JISZ 8730.
- the color coordinate b of the Han-Yuichi color difference formula in the ab color system is preferably 3 or less, more preferably 15 to 2.
- the acetoaldehyde content is 5 p. pm or less, particularly preferably 3 ppm or less.
- the polyester resin includes an antioxidant, an ultraviolet absorber, a light stabilizer, an antistatic agent, a lubricant, an antiblocking agent, an antifogging agent, a nucleating agent, a plasticizer, a coloring agent, a filler, and the like. It may be included.
- the polyester resin of the present invention has a haze of 5% or less at a thickness of 5 mm of a molded article injection-molded at 2701C (the polyester 5), preferably 30% or less, and more preferably 20% or less. More preferably, it is particularly preferably 10% or less. If the haze exceeds the above range, the transparency at the time of molding at a low temperature into a port or the like is inferior, and the molding must be carried out at a high temperature. Pollution cannot be sufficiently suppressed.
- the polyester resin of the present invention has a resin acetoaldehyde content (AA S ; p pm) in a molded article after injection molding at 270 ° C. and an acetoaldehyde content (AAo) of the resin before injection molding.
- the polyester resin of the present invention is obtained by subjecting a dicarboxylic acid component mainly composed of the aromatic dicarboxylic acid or an ester-forming derivative thereof and a diol component mainly composed of ethylene glycol to an esterification or transesterification reaction. It is produced by polycondensation in the presence of an antimony compound and the above-mentioned phosphorus compound, preferably in the co-presence of the above-mentioned metal compound, in particular, a magnesium compound and Z or a titanium compound. It depends on the customary method of manufacturing the resin.
- a slurry is prepared by mixing a dicarboxylic acid component mainly containing the aromatic dicarboxylic acid or an ester-forming derivative thereof and a diol component mainly containing ethylene dalicol, together with a copolymerization component and the like used as necessary. Put into a tank and mix under stirring to form a raw material slurry.Esterification reaction in an esterification reaction tank under normal pressure to pressure, heating, or transesterification in the presence of a transesterification catalyst.
- the obtained polyester low-molecular weight product as an esterification reaction product or a transesterification reaction product is transferred to a polycondensation tank, and is subjected to reduced pressure from normal pressure to gradually reduced pressure in the presence of the compound. It is produced by melt polycondensation under heating.
- an atom such as antimony or phosphorus is added to the obtained polyester resin in a specific range and in a specific amount ratio.
- the present invention also relates to a method for producing such a polyester resin.
- a preferred method for producing the polyester resin of the present invention includes a dicarboxylic acid component having an aromatic dicarboxylic acid or an ester-forming derivative thereof as a main component, and a dicarboxylic acid component having an ethylene glycol as a main component.
- Polyester resin by polycondensation A method for producing a polyester resin, characterized in that a catalyst is added to a reaction system so as to be contained in the following concentration range with respect to a polyester resin from which each atom derived from a polymerization catalyst can be obtained. Can be
- T is the total concentration of at least one atom or a plurality of atoms selected from titanium, hafnium and zirconium atoms in the resin (ppm)
- Sb is the concentration of antimony atom in the resin (ppm)
- P is the concentration of phosphorus atoms in the resin (ppm)
- the preferable ranges of the dicarboxylic acid component, the diol component, T, Sb, P and the like in the production method are as described above for the components of the polyester resin of the present invention.
- the following polymerization catalyst is further reacted with the obtained polyester resin so as to be contained in the following concentration range. Add to system.
- M is the total content of at least one metal atom selected from the group consisting of group IA metal atoms, group VIII metal atoms, manganese atoms, iron atoms, and cobalt atoms (ppm) in the resin (ppm))
- preferred ranges such as M and P are as described above for the components of the polyester resin of the present invention.
- a phosphorus compound is added to the reaction mixture containing the esterification reactant, and after the esterification rate reaches 90% or more, a Group IA element compound, II Add a compound of at least one metal atom selected from Group A compounds, manganese compounds, iron compounds and cobalt compounds, and then add titanium compounds, zirconium compounds, hafnium compounds, aluminum compounds, zinc compounds, gallium compounds And at least one compound selected from the group consisting of germanium compounds.
- the transesterification catalyst is produced through a transesterification reaction.
- the raw material slurry is prepared by preparing a carboxylic acid component containing aromatic dicarboxylic acid as a main component, a diol component containing ethylene dalicol as a main component, and a copolymer component used as necessary. And the like, with the molar ratio of the diol component to the dicarboxylic acid component being preferably in the range of 1.02 to 2.0, more preferably 1.03 to 1.7. If the molar ratio is less than the above range, the esterification reactivity decreases, while if the molar ratio exceeds the above range, the amount of diethylene glycol produced increases.
- esterification reaction usually, a multi-stage reactor in which a plurality of esterification reaction tanks are connected in series is used to reflux ethylene glycol, and to remove water and excess ethylene dalicol produced by the reaction from the system.
- esterification ratio the ratio of the esterified product of the raw dicarboxylic acid component that has reacted with the diol component in the full-strength lipoxyl group
- the number average molecular weight of the low molecular weight ester product obtained as the esterification reaction product is preferably from 500 to 5,000.
- the reaction temperature in the first-stage esterification reaction tank is usually 240 to 270 ° C, preferably 245 to 265, and the relative pressure to the atmospheric pressure is usually 5 to 300 kPa. (0.05 to 3 kgZcm 2 G;), preferably 10 to 200 kPa (0.1 S kgZcm 2 G), and the reaction temperature in the final stage is usually 250 to 280, preferably 255 to 275, and atmospheric pressure. Is usually 0 to 150 kPa (0 to 1.5 kg / cm 2 G), preferably 0 to 130 kPa (0 to 1.3 kg / cm 2 G).
- the reaction conditions in the final stage are adopted.
- tertiary amines such as triethylamine, tributylamine, and benzyldimethylamine
- hydroxylated compounds such as tetraethylammonium hydroxide, tetrabutylammonium hydroxide, and trimethylbenzylammonium hydroxide.
- Basic compounds such as quaternary ammonium, lithium carbonate, sodium carbonate, potassium carbonate, sodium acetate, etc.
- the melt polycondensation is usually carried out using a multi-stage reactor in which a plurality of melt polycondensation tanks are connected in series, while distilling off ethylene glycol produced under reduced pressure.
- the reactor for example, the first stage is a complete mixing type reactor equipped with stirring blades, and the second and third stages are horizontal plug flow type reactors equipped with stirring blades. Things are used.
- the reaction temperature in the first-stage polycondensation tank is usually 250 to 290 t, preferably 260 to 280 ° C, and the absolute pressure is usually 65 to 1.3 kPa ( 500 to 10 Torr), preferably 26 to 2 kPa (200 to 15 Torr), and the reaction temperature in the final stage is usually 265 to 300, preferably 270 to 295 ° C, and the absolute pressure is usually 1. It is set to 3 to 0.013 kPa (10 to 0.1 torr), preferably 0.65 to 0.065 kPa (5 to 0.5 torr). As the reaction conditions in the intermediate stage, an intermediate condition between them is selected.
- the reaction temperature in the second stage is usually 265 to 295 ° (: preferably 270 to 285 ° C.).
- the absolute pressure is usually 6.5 to 0.13 kPa (50 to 1 rr), preferably 4 to 0.26 kPa (30 to 2 torr).
- the addition of the antimony compound, the phosphorus compound, and the coexisting metal compound to the reaction system may be performed by any of a slurry preparation step of a raw material dicarboxylic acid component and a diol component, and an esterification reaction step. It may be any of the stages or the initial stage of the melt polycondensation step.However, after obtaining sufficient polymerization activity, the amount of antimony dissolved in the obtained polyester resin is further suppressed, and acetoaldehyde, etc.
- the phosphorus compound is preferably added to the slurry preparation tank or the first-stage esterification reaction tank, and the phosphorus compound is preferably added to the slurry preparation tank. It is particularly preferred to add them.
- the antimony compound and the coexisting metal compound are an esterification reaction product having an esterification rate of 90% or more in the esterification reaction step, specifically, for example, a final-stage esterification reaction tank in a multi-stage reactor.
- the metal compound is zinc, aluminum, gallium, It is particularly preferable to add before the compounds such as germanium, titanium, zirconium, and hafnium.
- the resin obtained by the melt polycondensation is usually withdrawn in the form of a strand from an extraction port provided at the bottom of the polycondensation tank, and then cut with a cutter while cooling with water or after cooling with water.
- the granular material after the melt polycondensation is further treated, for example, in an atmosphere of an inert gas such as nitrogen, carbon dioxide, or argon, as a relative pressure with respect to the atmospheric pressure, usually lOO kPa (1 kg / cm z G) or less, preferably 20 kPa (0.2 kg / cm 2 G) or less, or 6.5 to 0.013 kPa (50 to 0.1 lTo rr), preferably by heating at a temperature of 190-230 * ⁇ , preferably 195-225, under reduced pressure of 1.3-0.065 kPa (10-0.5 To rr). Polycondensed. By this solid-phase polycondensation, the degree of polymerization can be further increased and by-products such as acetate
- the resin is heated under an inert gas atmosphere, or under a steam atmosphere or an inert gas atmosphere containing water vapor, usually at 120 to 200 120, preferably 130 to 190 to obtain the resin. It is preferable to crystallize the surface of the granular material.
- the resin obtained by the above-mentioned melt polycondensation or solid-phase polycondensation is usually subjected to a water treatment in which the resin is immersed in 40 or more warm water for 10 minutes or more, or steam or a steam-containing gas of 60 "C or more. Treatment with steam for 30 minutes or more, or treatment with an organic solvent, or treatment with an acidic aqueous solution of various mineral acids, organic acids, phosphoric acid, etc., or Group IA metal, Group IIA metal
- the catalyst used for the polycondensation can also be deactivated by treatment with an alkaline aqueous solution such as amine or an organic solvent solution.
- the polyester resin of the present invention can be bottled by a conventional method, for example, by forming into a preform by injection molding, and then by stretch blow molding, or by professionally molding a parison formed by extrusion. Or formed into a sheet by extrusion molding, and then formed into a tray container or the like by thermoforming, or biaxially stretched from the sheet to form a film or the like. It is formed into various fiber processed bodies.
- the polyester resin of the present invention has excellent transparency and heat resistance while suppressing the elution amount of antimony, especially when used for hollow containers for non-carbonated beverages such as mineral water, tea and juice.
- the polyester is preferably used for the purpose of obtaining a container having high strength with higher productivity than before, but such an embodiment will be described in detail below.
- the ethylene glycol component in the polyester resin is preferably at least 96 mol%, more preferably at least 97.5 mol%, of the total glycol component in the resin, and the diethylene glycol component in the resin is the total dalicol component.
- the terephthalic acid component is preferably at least 98.5 mol%, more preferably at least 99.0 mol%, of the total acid component.
- diethylene glycol component diethylene dalicol by-produced in the reaction system may be copolymerized, and the content of the dioxyterephthalate component including the component added from outside the system as a copolymer component Is preferably 2.5 mol% or less of the total glycol component, more preferably 1.0 mol% or more and 2.5 mol% or less, and still more preferably 1.8 mol% or more and 2.3 mol% or less. is there.
- the amount of the antimony compound used is preferably 10 to 250 ppm as antimony atom (Sb) based on the theoretical yield of the polyester resin, and more preferably 30 to: I 80 ppm, more preferably 60 to 120 ppm, particularly preferably 80 to 100 ppm. If the amount of antimony atoms is small, the polymerizability is insufficient and the productivity is poor, the color tone is deteriorated, and the amount of by-products such as acetoaldehyde tends to increase. If the amount of the antimony atom is large, the transparency of the molded article is deteriorated, the amount of by-products such as acetoaldehyde is increased, and the color tone is liable to be deteriorated.
- Sb antimony atom
- the content of phosphorus atoms in the obtained polyester resin is the same as described above, but is more preferably 14 ppm or less, and sometimes preferably 5 to 10 pm for non-carbonated bottles. It is.
- the ratio of the antimony atom S b (p pm) and the phosphorus atom content P (p m) to the obtained polyester resin is the same as described above.
- the range of SbZP is within the above range, there is also an effect that the polymerization rate, the color tone, the amount of by-products such as acetoaldehyde, and the heat resistance and the transparency of a molded product are well balanced.
- the reaction is performed in the presence of one or more compounds of a metal element of a compound, a zinc compound, a gallium compound, and a germanium compound.
- the resin of the present invention contains a metal (M) derived therefrom. Is preferred.
- the content of these metal compounds with respect to the polyester resin is preferably 0.1 to 100 ppm, and when a magnesium compound is used, the weight ratio of the magnesium atom content to the phosphorus atom content is preferably 1.1 or more and 3.0 or less, more preferably 1.5 or more and 2.0 or less. Further, the content thereof is preferably 3 to 25 ppm, more preferably 8 to 18 ppm, based on the obtained polyester resin as a magnesium atom.
- the content thereof is preferably 0.25 to 10 ppm, more preferably 0.75 to 4 ppm as a titanium element with respect to the obtained polyester resin.
- the intrinsic viscosity IV is 0.65 to 0.90 (dl / g), preferably 0.70 to 0.90 (dl / g). 0.80 dl Zg. If the intrinsic viscosity is low, the strength and transparency of molded products such as bottles will deteriorate, and if the intrinsic viscosity is high, it will not be possible to efficiently obtain molded products with sufficient heat resistance and strength. Productivity, productivity during molding ⁇ The amount of by-products such as acetoaldehyde in the molded product increases.
- the cooling crystallization temperature Tc2 of the resin is from 150 to 20 Ot, preferably from 160 to 190.
- the cooling crystallization temperature means that the resin is injection-molded and the thickness shown in Fig. 1 is changed in six steps from 50 mm in length and 100 mm in width and from 0.5 mm in the horizontal direction to a step of 0.5 mm from 6 mm to 3.5 mm.
- the tip of the 3.5 mm thick part of the molded plate (part A in Fig. 1) was exposed to nitrogen at 20 ° C to 285 at 20 ° C using a differential scanning calorimeter. This is the crystallization peak temperature observed when the temperature is raised at 285 min., Maintained in the molten state at 285 for 5 min., And then decreased at 20 min. At 10 min. Is described later).
- the cooling crystallization temperature is higher than the above range, the transparency of the molded article will be poor, and if it is lower than the above range, the mold releasability during molding tends to deteriorate.
- the acetoaldehyde content of the resin is usually lOppm or less, preferably 3ppm or less, more preferably 2ppm or less, and further preferably 1ppm or less.
- lOppm or less preferably 3ppm or less, more preferably 2ppm or less, and further preferably 1ppm or less.
- the carboxylic acid terminal amount of the resin is usually 1 to 50 equivalents / ton of resin, preferably 1 to 40 equivalents of resin ton.
- the carboxylic acid terminal amount is measured by the method described in the example relating to polyester II in the examples described below.
- the color coordinate b value in the color difference formula of the resin hunter is preferably 4 or less, more preferably 2 or less. If the value of the color coordinate b exceeds the above range, it becomes yellowish, which impairs the aesthetics of a molded product such as a potter.
- a container having excellent transparency, heat resistance and strength while suppressing the elution amount of antimony can be produced with higher productivity than before. so
- a method for producing a polyester resin that can be obtained in addition to the method for producing a polyester that suppresses the amount of antimony eluted, the following embodiments are particularly preferable.
- the polyester resin of the present embodiment can be produced by a raw material slurry preparation, an esterification method or a transesterification method and a melt polymerization method according to a conventionally known method.
- a transesterification catalyst such as a titanium compound, a magnesium compound, a calcium compound, or a manganese compound is usually required.
- the amount of the transesterification catalyst required is determined by the amount of the polyester resin of the present invention.
- the esterification is performed using terephthalic acid as the dicarboxylic acid component, since the amount may be too large to obtain the compound.
- the esterification reaction can be performed only with the terephthalic acid component and the ethylene glycol component, but can also be performed in the presence of various additives.
- an antimony compound which is a catalyst for polycondensation, a Group IA element compound other than hydrogen contained in the polyester resin, a Group IA element compound, a phosphorus compound, and the like can be added to the esterification reaction step. It is also preferable to add a small amount of a basic compound in the same manner as in the above production method.
- the phosphorus compound is preferably mixed with the esterification reaction product at a stage where the esterification rate is less than 90%.
- a multi-stage reactor it is preferably added to the slurry preparation tank or the first stage of esterification and then added to the slurry preparation tank.
- the group IA element compound and / or the group IA element compound are preferably added to the ester at a stage of an esterification rate of 90% or more.
- it is added to the second stage of esterification.
- this order of addition reduces the amount of diethylene glycol units by-produced, suppresses the deposition of solid contaminants, improves polymerizability, and reduces thermal decomposition.
- the reaction is suppressed, and the number of carboxylic acid terminals and the amount of by-products such as acetylaldehyde can be suppressed in the obtained resin.
- the antimony compound is preferably added to a reactant having an esterification rate of 90% or more, specifically, at the latter stage of the esterification step at which the esterification rate is reached, or at the time of the melt polycondensation reaction from the esterification step. Supplied to the esterification reaction product during transfer supplied to the process, and supplied to the esterification reaction product during transfer supplied to the melt polycondensation reaction step from the esterification step. Preferably, it is supplied. By adding to this position, the amount of by-products of the diethylene glycol unit is suppressed, the precipitation of solid foreign matter is suppressed, the polymerizability is improved, and the thermal decomposition reaction is suppressed, so that the resulting resin has carbon dioxide.
- the number of acid terminals and the amount of side reaction products such as acetate aldehyde can be kept low.
- Titanium compounds, zirconium compounds, hafnium compounds, aluminum compounds, zinc compounds, gallium compounds, and germanium compounds should be supplied in the esterification step or in the esterification reaction product supplied to the melt polycondensation reaction step.
- the esterification reaction is more preferably added to a late-stage reactant having an esterification rate of 90% or more, and is a step subsequent to the addition of a Group IA element compound and hydrogen or a Group IIA element compound excluding hydrogen. It is preferable to add them. Specifically, it is supplied in the late stage of the esterification step that reaches the esterification rate or in the esterification reaction product during transfer supplied from the esterification step to the melt polycondensation reaction step, and is melted from the esterification step.
- the esterification reaction product is preferably supplied in the esterification reaction product during the transfer supplied to the polycondensation reaction step.
- the amount of by-products of diethylene glycol units is suppressed, solid foreign substances are prevented from being precipitated, the polymerizability is improved, and the thermal decomposition reaction is suppressed.
- the number of carboxylic acid terminals and the amount of by-products such as acetylaldehyde can be reduced.
- the above-mentioned catalyst components are preferably added at the position where they are added.
- antimony compounds and titanium compounds which are acid catalysts, zirconium compounds, hafnium compounds, aluminum compounds, zinc compounds, gallium compounds
- the germanium compound increases the by-product amount of diethylene dalicol units, so it is preferable to add it as soon as possible before entering the polycondensation step.
- the group IA element compound and / or the group IIA element compound except hydrogen, which is a base catalyst, is diethylene glycol.
- the polyester resin obtained in this way is particularly suitable for hollow containers for non-carbonated beverages, while suppressing the amount of antimony eluted while maintaining excellent transparency, heat resistance, and strength in containers. It can be obtained with higher productivity than before.
- the temperature condition of the injection molding is such that the mold temperature is 0 to 30 ° C., and the resin temperature is the melting point to 350: preferably the melting point + 10 to 320.
- the reheating temperature of the preform at the time of stretch blow molding is 70 to 130 ⁇ : preferably 80 to 125, and the mold temperature is from room temperature to 20Ot :, preferably from room temperature to 180 ° C.
- the heat treatment may be performed at 70 to 200 ° C, preferably 90 to 180 ° C.
- the most preferred temperature is between 120 and 160.
- a nucleating agent, a lubricant, a stabilizer, an antistatic agent, an antifogging agent, a colorant and other conventional additives can be appropriately compounded as required.
- the polyester resin of the present invention particularly when used as a bottle for carbonated beverages, has improved transparency, strength, resistance to flavor reduction of content beverages, and environmental stress cracking resistance while suppressing the amount of antimony eluted.
- the polyester is the polyester 3 described in the column of the disclosure of the present invention. Such an embodiment will be described in detail below.
- the polyester resin of this embodiment includes a dicarboxylic acid component in which terephthalic acid or an ester-forming derivative thereof accounts for at least 96 mol% of the total dicarbonic acid component, and a diol component in which ethylenedaricol accounts for at least 97 mol% of the total diol component. It is preferable that the ethylene terephthalate unit occupies 96 mol% or more of the constitutional repeating unit. If the ethylene terephthalate unit is less than 96 mol%, the molded article such as a bottle tends to have poor mechanical strength and heat resistance.
- the content (ppm) of the antimony compound and / or the titanium compound as an antimony atom (S b) and the content (ppm) as a titanium atom (T i) satisfy the following formula. It is preferable to contain in the range. 10 ⁇ Sb ⁇ 200
- the polyester resin of this embodiment is characterized by its polycondensability, reduction of by-products such as cyclic trimers and acetate aldehyde, and transparency and color tone of the obtained resin.
- phosphorus compound As the phosphorus compound, orthophosphoric acid, tris (triethylene glycol) phosphate, ethyl ethyl tyl phosphonoacetate, ethyl acid phosphate, triethylene glycol acid phosphate, phosphorous acid and the like are preferable. Tris (triethylene glycol) phosphate , Ethyl acetyl phosphonoacetate, ethyl acid phosphate, and triethylene dalichol acid phosphate are particularly preferred.
- the polyester resin of the present invention may contain the metal compound.
- the metal compounds include aluminum, chromium, iron, cobalt, nickel, copper, zinc, germanium, zirconium, molybdenum, silver, tin, lanthanum, oxides such as cerium, hafnium, tungsten, gold, and water. Examples include compounds such as oxides, alkoxides, carbonates, phosphates, carboxylate salts, and halides.
- polyester resin of this embodiment satisfies the following properties (A), (B), and (C).
- the temperature rise crystallization temperature (Tel) after forming a molded body is 155 ° C or more, and the temperature fall crystallization temperature (Tc2) is 180 ° C or less or is not observed.
- the polyester resin of the present embodiment preferably has a temperature-increased crystallization temperature (T Cl ) of 155 or more and a temperature-reduced crystallization temperature (Tc 2 ) of 180 ° C. or less or not observed after being formed.
- the temperature rise crystallization temperature (Td) is more preferably 157 ° C. or more
- the temperature fall crystallization temperature (Tc 2 ) is more preferably 178 ° C. or less or is not observed. If the rising crystallization temperature (Tc!) Is less than the above range or the falling crystallization temperature (Tc 2 ) is more than the above range, transparency as a molded article such as a bottle tends to be poor.
- the temperature rise crystallization temperature (Tc) Of the preform after injection molding at 280 ° C was determined using a differential scanning calorimeter (“DS C 220 C” manufactured by Seiko Denshi Co., Ltd.). ), The temperature was raised at a rate of 20 ⁇ : / min from 20 to 285 under a nitrogen gas flow, and the crystallization exothermic peak temperature observed on the way was measured.
- the cooling crystallization temperature (Tc 2 ) is to raise the temperature from 20 ° C to 285 ° C at a rate of 2 O ⁇ Z, maintain the molten state at 285 ⁇ for 5 minutes, and then cool down to 20 ° C at a rate of 10 ° C / min. Then, the crystallization exothermic peak temperature observed on the way was measured.
- the polyester resin of the present embodiment is obtained by forming an injection molded plate having a thickness of lmm with a cylindrical body having a diameter of 32mm. Stress rupture time of 10 minutes or more when immersed in 0.2% by weight aqueous sodium hydroxide solution of 25T: Is more preferred.
- the environmental stress destruction time was determined by measuring the length of both ends in the length direction of a cylindrical molded body along the circumference of a cylindrical body with a diameter of 32 mm along with a 50 mm long, 6 mm wide, and 1 mm thick cylindrical body. It was immersed in a 0.2% by weight aqueous solution of sodium hydroxide at 25 ° C while fixed for half a circumference, and the time required for cracks to be measured.
- polyester resin of the present embodiment further satisfies the following characteristics (D), (E) and (F).
- the ratio of diethylene glycol to the diol component in the resin is 2.0 mol% or less.
- the carboxylic acid terminal amount is from 20 to 50 equivalents of resin ton.
- the proportion of diethylene glycol in the diol component in the resin is preferably 2.0 mol% or less, more preferably 1.8 mol% or less, and 1.6 mol% or less. It is particularly preferred. If the proportion of diethylene glycol in the diol component exceeds the above range, the molded article such as a bottle tends to have poor environmental stress cracking resistance.
- the carboxylic acid terminal amount is measured by the method described in the example relating to polyester 3 in the examples described later.
- the polyester resin of this embodiment preferably has a carboxylic acid terminal amount of 20 to 50 equivalent resin ton. If the amount of the carboxylic acid terminal is less than the above range, the molded article such as a bottle tends to have poor environmental stress cracking resistance, while if it exceeds the above range, the thermal stability and the like tend to be poor. Further, the polyester resin of the present embodiment preferably has an intrinsic viscosity [7?] Of 0.75 to 1.OdlZg, more preferably 0.70 to 0.90 d1 / g. . When the intrinsic viscosity is less than the above range, the molded body such as a bottle has insufficient mechanical strength such as resistance to environmental stress cracking, and also tends to have difficulty in uniform stretching in molding such as stretch blow molding. Exceeding the moldability lowers the moldability and tends to cause problems such as breakage of the molded body due to blow pressure in molding such as stretch blow molding. Further, the polyester resin of the present embodiment preferably further satisfies the following property (G).
- the polyester resin of the present embodiment preferably has an absorbance at a wavelength of 1, OOO nm as an injection molded plate having a thickness of 4 mm of from 0.04 to 0.20, more preferably from 0.06 to 0.15. preferable. If the absorbance is less than the above range, the heat treatment at the time of forming the bottle takes a long time, and the productivity tends to decrease, or the shape of the plug portion or the like due to the heat treatment tends to deteriorate. Transparency tends to be inferior as a molded article such as a bottle.
- the polyester resin from which bottles can be obtained is preferably obtained by, in addition to the above-described polyester production method for suppressing the amount of antimony eluted, determining the copolymerization amount, the contained atomic weight, the number of carboxylic acid terminals, the intrinsic viscosity, etc. at the time of production. It can be obtained by adjusting the charged raw materials, the charged catalyst composition, the operating conditions, and the like according to a conventionally known method so as to be in the above-mentioned range.
- the polyester resin of the present embodiment obtained in this manner is particularly transparent when used as a bottle for carbonated beverages, while suppressing the amount of antimony eluted, and has transparency, strength, resistance to flavor reduction of content beverages, and resistance to resistance. A pottle excellent in environmental stress cracking properties can be obtained.
- it is prepared as a molding material by melt-plasticizing by an ordinary method. Then, for example, it is suitably used for molding an injection blow bottle in which a preform is formed by injection molding, then biaxially stretched in a blow molding die, stretch-formed and molded to form a pottle.
- the injection molding conditions at that time are within the range normally employed, for example, a cylinder temperature of 260 to 300, a screw rotation speed of 40 to 300 rpm, and an injection pressure of 4 ⁇ 10 6 to 14 ⁇ 10 6 P a, mold temperature 5 ⁇ 40 ° C, stretch blow molding conditions: stretch temperature 70 ⁇ 120 ° C, stretch ratio 1.5 ⁇ 3.5 times in longitudinal direction, circumferential direction It is about 2 to 5 times, and heat fixation is performed at a temperature of 100 to 200 ° C for several seconds to several minutes.
- the polyester resin of this embodiment is suitable for molding an injection blow bottle in which a preform obtained by injection molding is used to form a bottle by blow molding after reheating, and is particularly preferably used as a bottle for carbonated beverages. Can be
- the polyester resin of the present invention can be used for both non-carbonated and carbonic acid, particularly in the case of a hollow container used by heat sterilization and filling, while suppressing the elution amount of antimony and without reducing the transparency of the body.
- the polyester is used. 4 is preferable, but such an embodiment will be described in detail below.
- the polyester resin of this embodiment has an ethylene terephthalate unit as a main constitutional repeating unit, and its ester-forming derivative such as terephthalic acid or an alkyl ester having about 1 to 4 carbon atoms contains all dicarboxylic acid components.
- it is a polycondensate of a dicarboxylic acid component occupying 98 mol% or more and a diol component in which ethylene dalicol accounts for 95 mol% or more of the total diol component, and the ethylene terephthalate unit is 93 mol of a constitutional repeating unit. % Is more preferable. If the ethylene terephthalate rate unit is less than 93 mol%, the mechanical strength and heat resistance of the molded body tend to be inferior.
- the content of the antimony compound in the polyester resin of this embodiment is 0.02 to 2 mol (10 to 243 ppm) as antimony atom (Sb) per ton of the polyester resin, and 0.2 to 1.7 mol. (25-206 ppm).
- the content of the antimony compound as an antimony atom (Sb) is less than the above range, the polycondensability decreases, and the content of a cyclic trimer or the like as a by-product increases.
- the elution amount of the antimony compound tends to increase.
- the content of the phosphorus compound in the polyester resin is preferably from 0 :! to 7 mol (4 to 216 ppm) as phosphorus atom (P) per ton of the polyester resin, and from 0.3 to 4 mol. (10-123 ppm) is more preferred.
- phosphorus compound those similar to those described in the preferred embodiment for the carbonated bottle are used. preferable.
- the polycondensation of the polyester resin of the present embodiment is preferably carried out in the presence of a titanium compound.
- the polyester resin contains the titanium compound.
- the amount and the accompanying content in the polyester resin are preferably not more than 0.2 mol (9 ppm) as titanium atoms (T i) per ton of the polyester resin, and are preferably from 0.001 to 0.1 mol. (0.05 to 5 ppm) is more preferable. If the content of the titanium compound is less than the above range, the degree of improvement in transparency as the polyester resin tends to decrease, while if it exceeds the above range, the color tone tends to deteriorate.
- the polycondensation of the polyester resin is carried out in terms of its polycondensability, reduction of by-products such as cyclic trimers and acetoaldehyde, and transparency and color tone of the obtained resin.
- the compound is preferably made in the co-presence of a compound of an element of the group III or III. Accordingly, the polyester resin contains the compound of the element, the amount of the compound of the element used during polycondensation, and Accordingly, the content in the polyester resin is preferably 0.4 to 8 mol (9 to 194 ppm) as a total of the atoms of the compounds of the above-mentioned elements per ton of the polyester resin, and 0.6 to 4 mol. More preferably, it is molar (14-97 ppm).
- the intrinsic viscosity [77] of the polyester resin of this embodiment is preferably 0.6 to 1.0 Odl / g, and more preferably 0.7 to 1.0 d1. If the intrinsic viscosity is less than the above range, the mechanical strength of the polyester resin is insufficient, and uniform stretching is difficult in molding such as stretch blow molding. On the other hand, if the intrinsic viscosity is more than the above range, the moldability is reduced and the stretching is performed. Problems such as breakage of the molded body due to blow pressure in molding such as lip-to-mouth molding may occur.
- the polyester resin of this embodiment contains a polyolefin resin or a polyamide resin, and preferably contains the polyolefin resin or the polyamide resin in an amount of 0.001 to 1000 ppm, and an amount of 0.001 to 100 ppm. More preferably, it is contained.
- the content of the latter polyolefin resin or polyamide resin is less than the above range, the crystallization rate of the stopper portion in the case of a hollow container is inferior, and as a result, the productivity of the bottle is inferior. On the other hand, even if the above range is exceeded, the transparency is inferior.
- the polyolefin resin for example, a homopolymer of ⁇ -olefin having about 2 to 8 carbon atoms, such as ethylene, propylene, and butene-11, and those ⁇ -olefins, ethylene, propylene, 1-butene, 3-methyl-1-butene, 1-pentene, 4-methylene 1-pentene, 1-hexene, 1-octene, 1-decene, etc. , Vinyl acetate, acrylic acid, methacrylic acid, acrylic acid ester, methacrylic acid ester, copolymers with pinyl compounds such as vinyl chloride, styrene, and the like.
- low, medium, and high density Ethylene homopolymer such as polyethylene (branched or linear), ethylene-propylene copolymer, ethylene-l-butene copolymer, ethylene- 4-methyl-1- —Pentene copolymer, Ethylene-1-hexene copolymer, Ethylene-1-octene copolymer, Ethylene-Pinyl acetate copolymer, Ethylene-Acrylic acid copolymer, Ethylene-methacrylic acid copolymer, Ethylene- Ethylene resins such as ethyl acrylate copolymer, propylene homopolymer, propylene-ethylene copolymer, propylene-ethylene-ethylene
- Examples thereof include propylene resins such as 1-butene copolymer, and 1-butene resins such as 1-butene homopolymer, 1-butene-ethylene copolymer, and 1-butene-propylene copolymer.
- polyamide resin examples include polymers of lactams such as ptyrrolactam, ⁇ -valerolactam, ⁇ -prolactam, enantholactam, ⁇ -lauryl lactam, 6-aminocaproic acid, 7-aminoheptanoic acid, 8 —Aminooctanoic acid, 91-aminononanoic acid, 11-aminoundecanoic acid, polymers of amino acids such as 12-aminododecanoic acid, 1,4-butanediamine, 1,5-pentanediamine, 1,5-hexanediamine, 1,6-hexanediamine, 1,9-nonanediamine, 1,111-dedecadiamine, 1,12-dodecanediamine,, ⁇ -diamino Aliphatic diamine such as polypropylene glycol, 1,3- or 1,4-bis Alicyclic diamines such as (aminomethyl) cyclohexane, bis ( ⁇ -amin
- the polyolefin resin or the polyamide resin is directly added to the polyester resin so that the content is within the above range, and the polyester resin is melted.
- the polyolefin resin or the polyamide resin is added to the polyester resin in a production step, for example, at the time of melt polycondensation (raw material, Slurry, 'catalyst, etc.), immediately after melt polycondensation, immediately after pre-crystallization, during solid phase polycondensation, immediately after solid phase polycondensation, etc., or from the end of the manufacturing stage to the molding stage Add it directly as a powder in a period of time, etc., or mix a polyester resin chip with a liquid such as water dispersed as a powder.
- the polyester resin chips in contact with a gas such as air mixed as a powder or granules, or a polyester resin chip or polyamide resin under the flow conditions of the polyester resin chips. After mixing by a method such as contact with a member or the like, a method of melting and kneading may be used.
- a gas such as air mixed as a powder or granules, or a polyester resin chip or polyamide resin under the flow conditions of the polyester resin chips.
- the method of adding the polyolefin resin or the polyamide resin as powders is as follows: the chip-like body after the melt polycondensation of the polyester resin is transferred to the pre-crystallizer by vigorous force, or by solid-phase weight.
- Polyolefin resin or polyamide resin in the air for pneumatic transportation during pneumatic transportation to the condensation tank, or pneumatic transportation to the storage tank of the chip-shaped body after solid-phase polycondensation, or pneumatic transportation to the molding machine Is preferred.
- a polyester resin chip is applied to the member in a space where the member made of the polyolefin resin or the polyamide resin exists. It is preferable to make collision contact. Specifically, for example, immediately after melt polycondensation of polyester resin, immediately after pre-crystallization, immediately after solid-phase polycondensation, etc., and during the transportation stage of polyester resin chips as a product, etc. At the time of filling and discharging of transport containers at the time of injection of molding machine at the stage of molding polyester resin chips, etc.
- Pneumatic transportation piping, gravity transportation piping, silos, punching plate of vibrating sieve, magnet catcher magnet part etc. are made of polyolefin resin or polyamide resin, or polyolefin resin or polyamide resin lining, etc.
- a method of transferring a polyester resin chip by, for example, installing a member made of a polyolefin resin or a polyamide resin such as a rod or a net in the transfer path may be used.
- the contact time of the polyester resin chip with the above member is usually very short, about 0.01 to 1 second, but a trace amount of a polyolefin resin or a polyamide resin can be mixed into the polyester resin.
- the polyester resin of the present embodiment has a temperature rising crystallization temperature (T C1 ) of 155 to 165 ° C. and a temperature falling crystallization temperature (Tc 2 ) of 180 ° C. or less after being formed.
- the temperature increase crystallization temperature (T C1 ) is more preferably 157 to 164, and the temperature decrease crystallization temperature (Tc 2 ) is 178 T or less or is not observed.
- T C1 is less than the above range
- the transparency of the polyester resin composition is inferior.
- the temperature exceeds the above range, heat treatment during bottle molding is performed. This may take time and reduce productivity, or the shape of the plug and the like due to the heat treatment may be deteriorated.
- the crystallization temperature (Tc 2 ) exceeds the above range, the transparency of the polyester resin will be poor.
- the temperature rise crystallization temperature (T C1 ) of the preform after injection molding at 280 ° C. was determined by using a differential scanning calorimeter (“DSC 220 C” manufactured by Seiko Denshi Co., Ltd.). )), The temperature was increased at a rate of 201 / min from 20 to 285 under a nitrogen stream, and the crystallization exothermic peak temperature observed on the way was measured.
- the polyester resin of the present embodiment preferably has a cyclic trimer content (CT.) Of 0.45% by weight or less from the viewpoint of mold contamination resistance during molding and the like. Content when used From the viewpoint of the taste resistance of food and drink, etc., it is preferable that the acetoaldehyde content (AA Q ) is ⁇ ⁇ ⁇ ⁇ m or less, and from the viewpoint of the color tone as a bottle etc.
- the color coordinate b of the hunter's color difference formula in the Lab color system described in Reference 1 of JISZ 8730 is 4 or less. Is preferred.
- the cyclic trimer content (CT D ) is more preferably 0.40% by weight or less, and the acetoaldehyde content (AA Q ) is more preferably 5 p or less. More preferably, the color coordinate b of the Hunter's color difference formula is 3 or less.
- the polyester resin of the present embodiment is preferably the difference (CT S -CTo) is Ru der 0.1 5 wt% or less with, for it is 0.10 wt% or less Is more preferred.
- the polyester resin obtained in this way especially in the case of a non-carbonated and carbonic acid-use hollow container used for hot filling, reduces the amount of antimony eluted and reduces the body transparency.
- a potter can be obtained which has a high crystallization rate of the plug portion, is excellent in productivity of the hollow container, and has excellent dimensional stability of the plug portion and little deformation of the plug portion during hot filling.
- it is useful for forming an injection blow molded body in which a bottle or the like is biaxially stretched in a blow molding die and stretch blow molded to form a bottle or the like.
- a hollow container to be heat-sterilized and filled by heat-treating a preform or a plug portion of a pottle with an infrared heater or the like.
- injection molding conditions at that time a range that is usually adopted, for example, cylinder temperature 260 to 300 ⁇ , Sukuriyu rpm 40 to 300 r pm, injection pressure 4 X 10 6 ⁇ 14 X 1 0 6 Pa, mold temperature 5 ⁇ 4 OX, stretch blow molding conditions: stretch temperature 70 ⁇ 120T, stretch ratio 1.5 ⁇ 3.5 times in longitudinal direction, 2 in circumferential direction Heat fixation is performed at a temperature of 100 to 200 ° C for several seconds to several minutes.
- the preform obtained by the injection molding method is molded into a pottle by a blow molding method such as a cold parison method of biaxially stretching after reheating.
- a blow molding method such as a cold parison method of biaxially stretching after reheating.
- Suitable as a bottle for example, fruit drinks, tea or mineral water It is suitably used as a hollow container to be used for heat-sterilized filling of first-class beverages and the like.
- the specific surface area obtained from the polyester resin of the present embodiment is 0.6 to 0.8 elution amount of antimony compound when filled with hot water in cm one first injection blow bottle 9 3, water antimony It has extremely excellent antimony compound elution resistance with an atomic (Sb) concentration of 1.0 O ppb or less.
- the specific surface area of the bottle is a value obtained by dividing the surface area inside the bottle by the volume of the bottle.
- the polyester resin of the present invention suppresses the amount of antimony eluted, while making the number of particles inside the resin extremely small, and when forming fibers or films, almost no yarn breakage or film breakage due to particles occurs.
- the polyester is preferably used, but such an embodiment will be described in detail below.
- the preferred amount of terephthalic acid or its ester-forming derivative is at least 95 mol%, more preferably at least 98.5 mol%, even more preferably 100 mol%, of the dicarboxylic acid component. Is at least 95 mol%, preferably at least 97 mol%, preferably at least 98 mol% of the diol component.
- diethylene glycol by-produced in the reaction system may be copolymerized, and diethylene glycol including a component added from outside the system as a copolymer component may be used.
- the content of the component is preferably 3 mol% or less, more preferably 0.5 mol% or more and 2.5 mol% or less, and still more preferably 1.0 mol% or more and 2.0 mol% or less.
- the amount of the copolymer component is larger than the above range, sufficient heat resistance and strength cannot be obtained when a molded article is obtained, and if the amount of the copolymer component is less than the above range, a molded article will be produced. Tends to be less transparent.
- Polyester resin of this embodiment is preferably the number of particles above 1 tm internal resin 2 0 0. Is 0 1 mm 3 or less.
- the number of particles inside the resin is determined by melting the polyester resin.
- the polyester film obtained by shape, expanded by interference microscope, also measures the number of more than 1 m in size particle in the image processing apparatus in the film thickness direction, in terms of the number of particles per 0. 01mm 3 Details are described in the section of Examples. -.
- the number of particles above 1 / m of the inner resin is preferably 10 or Z0 01Mm 3 or less, more preferably rather is 5 / 0. 01mm 3 or less, more preferably 3 / 0.
- 01 mm 3 or less Particularly preferred is 2 pieces / 0.0 lmm 3 or less, and most preferred is 1 piece Z 0.01 mm 3 or less.
- the number of particles is more than the above range, when a film or fiber is formed at a high speed, the film tends to be broken or broken due to the concentration of stress on the foreign material, or the surface is reduced when the film is used as a bottle.
- a projection called a so-called fish eye tends to be formed on the surface, which tends to impair the appearance.
- a pentavalent phosphate such as ethyl acid phosphate is preferable from the viewpoint of suppressing the number of particles in the resin and improving the polymerization rate.
- the content of phosphorus atoms in the obtained polyester resin is preferably 0.1 to 20 ppm, more preferably 2 to 15 ppm, and still more preferably 4 to L 0 ⁇ pm. It is preferable from the viewpoints of suppressing the number of particles, polymerization rate, thermal stability, and volume resistivity of the resin. In other words, if the amount of P is small, the amount of foreign substances is small, the volume resistivity of the resin increases, and the polymerization rate is high, but the color tone deteriorates, and the number of acid terminals of the resin increases, and the melting heat stability tends to deteriorate. Yes, the more the P, the opposite tendency. In the above range, the above items are the most balanced.
- the preferable content of the phosphorus atom is relatively small as compared with conventionally known techniques.
- the color tone and the heat stability during melting are significantly deteriorated.
- the content of various compounds derived from the catalyst is reduced as described below.
- the total content S of at least one atom selected from the group consisting of antimony atoms, aluminum atoms, zinc atoms, and gallium atoms is preferably 10 ⁇ S ⁇ 200 (weight ppm to polyester resin).
- the content of antimony atom (Sb) is preferably S b ⁇ 200, more preferably 30 Sb ⁇ 150, further preferably 60 ⁇ S b ⁇ 10 0 (both weight ppm to polyester resin).
- the content of antimony atoms is low, the number of particles in the resin will decrease, but the polymerization rate, color tone, number of acid terminals, and melting heat stability tend to deteriorate. If the content of antimony atoms is high, the particles in the resin will decrease. Although the number increases, the polymerization rate, color tone, number of acid terminals, and melt heat stability tend to improve, and the above items are most balanced in the above range.
- the phosphorus atom content P (weight p pm vs. polyester resin) and the antimony atom content S b (weight; p pm vs. polyester resin) preferably satisfy 6.0 ⁇ S b / P ⁇ 30. And more preferably, 9 ⁇ SbZP ⁇ 22.5.
- the larger the Sb / P the smaller the number of foreign substances, but the smaller the Sb / P, the lower the polymerization rate, and the lower the color tone, the number of acid terminals, and the stability of the melting heat.
- the antimony atom content Sb when the SbZP is within the above range, the above-mentioned various physical properties and various items are most balanced. ⁇ Other components>
- the total content of any one or a plurality of titanium atoms, zirconium atoms, hafnium atoms, or a combination thereof is 0.1 ⁇ T ⁇ 10 (weight ppm to polyester resin). preferable.
- Titanium, zirconium, and hafnium atoms are derived from titanium, zirconium, and hafnium compounds that are added as catalysts during the production of polyester resin.
- the size is large, the polymerization rate increases, but the color tone deteriorates.
- T is small, the color tone becomes good, but the polymerization rate is deteriorated, and various physical properties and various items are balanced in the above range.
- T i When a titanium atom is contained, its content T i is preferably 0.5 ⁇ T i ⁇ 6 (weight ppm to polyester resin), and l ⁇ T i ⁇ 3 (weight p pm to polyester resin G).
- the polyester resin of this embodiment has a total content M ′ of one or more of a group IA metal atom, a group IIA metal atom, a manganese atom, an iron atom, and a cobalt atom of 0.1 ⁇ M ⁇ 100 (weight (ppm versus polyester resin).
- the polyester resin of the present embodiment contains a magnesium atom
- its content M g is preferably 10 ⁇ Mg ⁇ 70 (weight ppm relative to the polyester resin), and 20 ⁇ Mg ⁇ More preferably 40 (ppm by weight relative to polyester resin).
- the magnesium content M and the phosphorus atom content P satisfy 1.5 ⁇ MgZP ⁇ 15 (weight ppm to polyester resin).
- Mg / P ratio is large, the polymerization rate is improved, the color tone is improved, and the volume resistivity is increased (improved).
- Mg ZP is small, although the number of acid terminals and the melt heat stability are improved, the polymerization rate, color tone, and volume resistivity are deteriorated, and the phosphorus atom content P and magnesium atom content M
- the esterification method is preferred. Because the transesterification method generally requires a relatively large amount of transesterification catalyst such as a titanium compound, a magnesium compound, a calcium compound, and a manganese compound. This is because the number of particles tends to increase.
- transesterification catalyst such as a titanium compound, a magnesium compound, a calcium compound, and a manganese compound. This is because the number of particles tends to increase.
- the esterification reaction can be performed only with the terephthalic acid component and the ethylene glycol component, but can also be performed in the presence of various additives.
- various additives for example, the above-mentioned phosphorus compound, antimony compound, titanium compound, zirconium compound, hafnium compound, group IA metal compound, group IIA metal compound, manganese compound, iron compound, cobalt compound, etc. may be added to the esterification reaction step. it can.
- a basic compound such as lithium carbonate, sodium carbonate, potassium carbonate, and sodium acetate
- the polyester resin of this embodiment is obtained by adding the above-mentioned various compounds in the above-described amount range in a specific addition order in the above-described esterification reaction or transesterification reaction and the subsequent melt polycondensation step. It is preferably manufactured.
- the phosphorus compound is preferably added at a stage where the esterification rate is less than 90%.
- it is preferably added to the slurry preparation tank or the first stage of esterification and then added to the slurry preparation tank.
- the IA group metal compound, the VIII group metal compound, the manganese compound, the iron compound, and the cobalt compound are preferably added at a stage having an esterification ratio of 90% or more.
- a stage having an esterification ratio of 90% or more For example, when a multi-stage reactor is used, it is preferably added to the second stage of esterification.
- the aluminum compound, the zinc compound, the gallium compound, the germanium compound, and the antimony compound are preferably added to a reactant having an esterification rate of 90% or more, specifically, in the latter stage of the esterification step that reaches the esterification rate.
- the titanium compound, the zirconium compound, and the hafnium compound are preferably supplied to the esterification reaction product supplied to the esterification step or the melt polycondensation reaction step, and the esterification rate in the latter stage of the esterification reaction is 90%. It is more preferable that the compound is added to the above reactants, and it is preferable that the compound is added in a step subsequent to the addition of the group IA metal compound and the group VIII metal compound. Specifically, it is supplied to the esterification reaction product at the latter stage of the esterification step at which the esterification ratio is reached or the esterification reaction product being transferred from the esterification step to the melt polycondensation reaction step. In the transfer esterification reaction product supplied to the reaction process Preferably it is supplied.
- this addition order not only reduces the number of particles in the resin, but also keeps the number of carboxylic acid terminals low and improves the polymerization rate. I do.
- the polyester resin is produced up to the melt polycondensation.
- the polyester resin obtained by the melt polycondensation is substantially in an amorphous state, and melts quickly upon heating. Excellent molding productivity. It is preferable that the polyester resin of this embodiment is also obtained by melt polycondensation.
- the intrinsic viscosity (IV) of the polyester resin of the present embodiment obtained as described above is preferably 0.55 to 0.70 d1, and 0.58 to 0.68 d1 / g. Is more preferable. If the intrinsic viscosity is low, the strength and transparency of a molded product such as a film will deteriorate, and if the intrinsic viscosity is high, besides the productivity of the resin, the productivity during molding ⁇ By-products such as acetoaldehyde in the molded product Physical quantity deteriorates.
- the polyester resin of the present invention preferably has a carboxylic acid terminal number (A V) of 50 equivalents / ton or less.
- a V carboxylic acid terminal number
- the polyester resin of the present embodiment preferably has a volume resistivity of 1 ⁇ 10 6 to 1 ⁇ 10 10 ⁇ ⁇ cm, more preferably 1 ⁇ 10 6 to 1 ⁇ 10. 9 ⁇ ⁇ cm, more preferably 1 ⁇ 10 7 to 5 ⁇ 10 ⁇ 8 ⁇ * cm.
- the volume resistivity values are based on the amount of phosphorus compound used, the amount of aluminum compound, zinc compound, gallium compound, germanium compound, and antimony compound used, Group IA metal compound, Group ⁇ metal compound, manganese compound, iron compound, and cobalt. It can be adjusted by the amount of the compound used, the amount of the titanium compound, the zirconium compound, or the amount of the hafnium compound used.
- the value of the volume resistivity is within the above range, the adhesiveness of the film to the roll when the film is formed is reduced, and high-speed forming is enabled.
- the b value of the polyester resin of the present embodiment in the Hunter color coordinate system is preferably 5 or less, more preferably 3 or less. If the b value is high, the molded product looks yellowish, which is a problem in appearance.
- the content of the diethylene glycol component is The amount is preferably 3 mol% or less, more preferably 0.5 mol% or more and 2.5 mol% or less, and still more preferably 1.0 mol% or more and 2.0 mol% or less. If the amount of the diethylene glycol component is large, sufficient heat resistance and strength cannot be obtained in the case of a molded article, and if it is small, the transparency of the molded article tends to deteriorate.
- the polyester resin obtained in this way suppresses the amount of antimony eluted, while reducing the number of particles inside the resin, especially when forming fibers or films. Almost no occurrence such as a fish eye on the surface of a molded article such as a film can be made.
- the container can then be formed by drawing using this sheet.
- the polyester composition when producing a film, is extruded at a temperature of melting point (Tm: "C) to (Tm + 70) ° C to obtain an unstretched film, and the unstretched film is uniaxially (longitudinally). or in the lateral direction) (Tg- 10) temperature at ⁇ (T g +70) (where, Tg:. 2.
- the stretching means may be any of simultaneous biaxial stretching and sequential biaxial stretching. May be.
- the obtained film can be heat-set at a temperature of (Tg + 70) to Tm ().
- Tg + 70 a temperature of (Tg + 70) to Tm ().
- the heat setting time is, for example, 1 to 60 seconds.
- the film surface projections are preferably
- L 1 is more preferably 30 or less, further preferably 20 or less, particularly preferably 10 or less.
- L2 is more preferably 5 or less, and L3 is more preferably 1 or less.
- the spinning speed is from 700 to 800 m / min, preferably from 200 to 500 OmZ. . If the spinning speed is less than 700 mZ, the productivity is low and the cost is high, which is not practical. Also, spinning at 800 Om / min or more is preferable in view of theoretical productivity, but the problems that must be solved engineeringly, such as controlling the associated flow generated during spinning, increase. Unless remodeling such as spinning equipment is implemented, yarn breakage during spinning frequently occurs, which is not preferable.
- the spun yarn thus obtained may be wound and stretched at any time, or may be continuously drawn without being wound and used as a drawn yarn.
- the thickness of the yarn is not particularly limited, and may be from an extremely fine thread of 1 dpf or less to an extremely thick thread of 100 dpf or more. Depending on the application, false twisting and crimping may be applied, and the cross section of the fiber may be round, triangular or hollow. Composite spinning with other materials is also possible.
- the fiber length is desirably 3 to 20 Omm, and more preferably 10 to 15 Omm, as is known. Although this is also known, the degree of crimp is preferably from 5 to 35%, more preferably from 8 to 30%.
- polyester resin granules having a number average particle weight of 24 mg were crystallized by heating at 120 for 10 hours, then immersed in 150 g of 95 hot water for 60 minutes, and then extracted into water.
- the measured antimony was measured as an antimony atom concentration C (ppb) using an inductively coupled plasma mass spectrometer (“HP 4500” manufactured by Hewlett-Packard Co.).
- the amount of elution D (g) was calculated.
- a 2.5 g resin sample was incinerated with hydrogen peroxide in the presence of sulfuric acid by a conventional method, completely decomposed, and made up to 50 ml with distilled water.
- a high-frequency inductively coupled plasma emission spectrometer (JOBIN YVON Quantification was performed by plasma emission spectroscopy using a “JY46P type” manufactured by KK.
- a solution prepared by dissolving the sample at a concentration of 3% by weight in a mixed solvent of deuterated chromatoform Z-hexafluoroisopropanol (weight ratio: 7Z3) was analyzed by a nuclear magnetic resonance apparatus (JEOL JN 1H-NMR was measured by M-EX270 type ”), and the peak of each acid component was assigned. From the integrated value of the peak, the mole% of the acid component relative to the total acid component was calculated.
- a solution prepared by dissolving a resin sample in a mixed solvent of deuterated chloroform Z hexafluoroisopropanol (weight ratio: 7/3) at a concentration of 3% by weight was analyzed by a nuclear magnetic resonance apparatus (JNM? EX 270 manufactured by JEOL Ltd.). 1H-NMR was measured with the “type”, each peak was assigned, and the mole% of diethylene glycol based on the total diol component was calculated from the integrated value of the peak.
- the ratio (77 spZc) was determined for each of 5 g / d 1, 0.2 g / d 1, and 0.1 g / d 1, and the concentration (c) was calculated as 0 from these values.
- the ratio (77SpZc) was calculated as the intrinsic viscosity [] (dlZg).
- Resin sample 4.Omg was precisely weighed, dissolved in 2m1 of mixed solvent of chloroform / hexafluoroisopropanol (volume ratio 3Z2), diluted with 20ml of chloroform and diluted with methanol. 1 Oml was added for precipitation, followed by filtration. The filtrate obtained was evaporated to dryness, dissolved in 25 ml of dimethylformamide, and the amount of cyclic trimer (cyclotriethylene terephthalate) in the solution was measured using a liquid. It was measured by chromatography (“LC-lOAj” manufactured by Shimadzu Corporation).
- the resin sample was filled into a cylindrical powder colorimetric cell with an inner diameter of 36 mm and a depth of 15 mm with a sharp edge, and the JISZ was measured using a colorimeter (ND-300A, manufactured by Nippon Denshoku Industries Co., Ltd.).
- the color coordinate b of the hunter's color difference formula in the Lab color system described in Reference 1 of 8730 was determined as the simple average of the values measured at four locations by rotating the cell by 90 degrees by the reflection method. The measurement was performed after the device had been left for at least 4 hours after power-on and had been sufficiently stabilized. The lower the b value, the less yellowish and the better the color tone.
- Resin sample 5.Og was accurately weighed, sealed in a 5 Om1 micro-bomb with 1 Om1 of pure water under a nitrogen seal, and heated and extracted at 160 ° C for 2 hours.
- the amount of acetoaldehyde was determined by gas chromatography using isobutyl alcohol as an internal standard (“GC-14A” manufactured by Shimadzu Corporation) and expressed as a ratio (ppm) per PET polyester weight.
- GC-14A isobutyl alcohol as an internal standard
- ppm ppm
- ⁇ Acetaldehyde content (AAs) of molded plate> Using a sample cut into chips of about 4 mm square from the rear end part and 3.5 mm part of the molded plate and the 4 mm part (part B in FIG. 1), measurement was performed in the same manner as described above.
- the concentration (ppb) of antimony atoms in water was measured using.
- the color tone of the bottle stopper was visually observed and evaluated according to the following criteria.
- A Colorless and transparent.
- TMP Trimethyl phosphate
- D EG copolymerization amount Diethylene glycol copolymerization amount in glycol component 1
- PA copolymerization amount Isophthalic acid copolymerization amount in carboxylic acid component
- 280 haze The height of the 5.0 mm part of the stepped plate injection-molded at a cylinder temperature of 280.
- 27 AAs Acetaldehyde content of a stepped plate injection molded at a cylinder temperature of 270.
- OTC CTs Includes annular trimer of stepped plate injection molded at cylinder temperature of 270
- 270 ⁇ haze The haze of the 5.0mm part of the stepped plate injection-molded at a cylinder temperature of 270.
- A In a continuous esterification method, a phosphorus compound is added to a slurry tank, an antimony compound and a magnesium compound are added to a second esterification tank, and a titanium compound is transferred from the second esterification tank to the first polymerization tank. Add to piping
- a continuous polymerization apparatus consisting of a slurry preparation tank, a two-stage esterification reaction tank connected in series with the slurry preparation tank, and a three-stage molten polycondensation tank connected in series with the second esterification reaction tank
- terephthalic acid and ethylene glycol were continuously supplied at a weight ratio of 865: 485, and a 0.3% by weight ethylene glycol solution of ethyl acid phosphate was added to the resulting polyester resin.
- a slurry was prepared by continuously adding the phosphorus atom (P) in an amount of 9 wt ppm, stirring, and mixing to prepare a slurry.
- the polyester resin chips obtained above were continuously supplied to a stirring crystallizer held at about 160 ⁇ under a nitrogen atmosphere so that the residence time was about 60 minutes, and crystallization was performed. After that, the mixture was continuously supplied to a column-type solid-phase polycondensation apparatus, and heated at 205 ° C. in a nitrogen atmosphere to perform solid-phase polycondensation.
- the diethylene glycol copolymerization amount, the intrinsic viscosity, the color coordinate b value as a color tone, and the acetoaldehyde content were measured by the above-described methods, and the results are shown in Table 1.
- the obtained polyester resin chip is dried in an inert oven (ES PEC "IPH-201 type") under a nitrogen flow of 40 liters Z for 1 hour at 160 ° C for 4 hours and then injected.
- molding machine at (Meiki Co. ⁇ - 7 0 ⁇ ⁇ I- DM ") at a cylinder temperature of 2 8 0 ° C, a back pressure 5 X 10 5 P a, injection rate 40 c cZ seconds, holding pressure 35 X 1 0 5 Pa, mold temperature 25 ° C, molding cycle about 75 seconds, the shape shown in Fig.
- the obtained polyester resin chip was dried at 130 at a vacuum drier for 10 hours, and then, at an injection molding machine (“FE-80S” manufactured by Nissei Plastic Industries Co., Ltd.) at a cylinder temperature of 280 back pressure 5 X 1 0 5 P a, the injection rate 45 cc / sec, holding pressure 30 X 1 0 5 P a, a mold temperature of 20 ° C, formed In a cycle of about 40 seconds, a preform of about 29 mm in outer diameter, about 165 mm in height, about 3.7 mm in average wall thickness, and about 60 g in weight was injection molded.
- FE-80S manufactured by Nissei Plastic Industries Co., Ltd.
- the obtained preformed body was heated in a near-infrared irradiation furnace equipped with a quartz heater for 70 seconds, allowed to stand at room temperature for 25 seconds, and then placed in a blow mold set at 160 ° C and stretched with a stretching rod. in while stretching in the height direction, one second blow pressure 7 X 10 5 3, further 30 X 10 5 P a at 40 seconds blow molding, by then heating Bok set, air-cooled, an outer diameter of about 95 mm, height A bottle with a length of about 305 mm, an average wall thickness of about 0.37 mm, a weight of about 60 g, an internal volume of about 1.5 liters, and a specific surface area of about 0.7 cm- 1 was molded.
- the compounds shown in Table 1 were used as the phosphorus compounds, and were added in such an amount that the content of phosphorus atoms (P) in the resulting polyester resin was as shown in Table 1, and magnesium atoms were added to the resulting polyester resin.
- Mg phosphorus atoms
- Sb antimony atom
- Ti titanium atom
- a phosphoric acid solution was used as the phosphorus compound, and was added through the upper pipe of the second-stage esterification reaction tank.
- a magnesium acetate solution was added through the upper pipe of the first-stage esterification reaction tank.
- the solution of antimony oxide and the solution of tetrabutyl titanate were added to the transfer pipe from the second-stage esterification reaction tank to the first-stage molten polycondensation tank, and each compound was added to the resulting polyester resin.
- Example 1-11 The measurement and evaluation were performed in the same manner as in Example 1-1, and the results are shown in Table 1.
- Example 1-1 No tetrabutyl titanate was added, and the solution of antimony trioxide and magnesium acetate tetrahydrate was transferred from the second-stage esterification reactor to the first-stage molten polycondensation tank. Same as in Example 1-1, except that they were added to the feed pipe, and that each compound was added to the resulting polyester resin in such an amount that each metal atom content was as shown in Table 1.
- a polyester resin was produced as described above, and the obtained polyester resin was measured and evaluated in the same manner as in Example 11-11. The results are shown in Table 1.
- Dimethyl terephthalate (100 parts by weight) and ethylene glycol (70 parts by weight) were mixed with calcium acetate monohydrate and magnesium acetate tetrahydrate as transesterification catalysts in an amount to give the content of each metal atom shown in Table 1.
- the transesterification reaction was started according to a conventional method, and 20 minutes after the start of the distillation of methanol, antimony trioxide was added in an amount such that the metal atom content shown in Table 1 was reached, and the transesterification reaction was continued. After that, trimethyl phosphate was added in such an amount as to give the metal atom content shown in Table 1, thereby substantially terminating the transesterification reaction.
- TPA 'copolymerization amount (mol3 ⁇ 4 100 100 100 100 100 100 Resin physical properties Intrinsic viscosity (dl / g) 0.78 0.78 0.78 0.78 0.78 0.78 0.78 Color coordinate b +0.4 +0.9 +3.1 +3.5 +1.5
- Polyester that can provide containers with excellent transparency and heat resistance while suppressing the amount of antimony eluted in non-carbonated beverage hollow containers with higher productivity than before Examples of the resin will be described.
- a 4N-KOH / methanol solution (50 ml) was added to 5 g of the sample resin ground with a 1.5 mm hole plate using a Wille type mill (Model 1029—A) manufactured by Yoshida Seisakusho Co., Ltd. Set the cooler, and stir on a hot plate with a magnetic stirrer (at a surface temperature of 200) while heating for 2 hours to hydrolyze. After cooling, about 20 g of high-purity terephthalic acid was added, and the mixture was neutralized by sufficient shaking. The slurry was adjusted to pH 9 or less. Wash twice with 2m1 and combine the filtrate and washing solution to make a test solution for gas chromatography.
- test solution 1 i 1 was injected with a microsyringe into Shimadzu Corporation Gas Chromatography Co., Ltd. (Model GC-14APF). From the peak area of each glycol component, the mole% of each glycol component with respect to the total glycol component was calculated as follows: It was calculated according to the following equation.
- ACO Area of the Dalicol component (V ⁇ sec)
- A is the amount of 0.1 N caustic soda in benzyl alcohol required for titration (/ 1)
- B is the amount of 0.1 N caustic soda in benzyl alcohol required for blank titration (; 1)
- W is the amount of the polyester resin sample (g)
- f is the titer of a 0.1 IN caustic soda solution in benzyl alcohol.
- the titer (f) of a 0.1 N solution of caustic soda in benzyl alcohol was determined by taking 5 ml of methanol in a test tube and adding 1 to 2 drops of a phenol red ethanol solution as an indicator. The solution was titrated with 0.4 ml of benzyl alcohol solution of N caustic soda to the color change point, then 0.2 ml of 0.1 N hydrochloric acid aqueous solution with a known titer was taken as a standard solution, and added again. Was titrated to a color change point with a benzyl alcohol solution of sodium hydroxide. (The above operation was performed while blowing dry nitrogen gas.) The titer ( ⁇ ) was calculated by the following equation.
- Titer (f) Titer of 0.1 N hydrochloric acid aqueous solution X 0.1 Sampling amount of 1 N hydrochloric acid aqueous solution 1) / Titration of 0.1 N caustic soda in benzyl alcohol solution ( ⁇ )
- a 3.5 mm thick part (A in Fig. 1) of the molded plate was cut out, dried at 40 ° C for 3 days in a vacuum drier, and the sample cut out from the non-surface part was used. Approximately 10 mg is precisely weighed and sealed using an aluminum open pan and pan cover (normal pressure type, P / NSSC 000 E030 and PZN SSC 000 E032J, manufactured by Seiko Iden Co., Ltd.). (Seiko “DSC 220 C”), the temperature was raised from 20 ° C to 285 at a rate of 2 Ots under a nitrogen stream, and the melted state was maintained at 2851 for 5 minutes. The temperature was lowered to 201: at the rate of / min, and the crystallization peak temperature observed in the middle was measured.
- the obtained polyester resin chip was sufficiently dried.
- resin temperature 280 ° C resin temperature 280 ° C, back pressure 5 kg / cm 2 before and after the injection rate 45 cc / sec about, holding pressure 30 k gZcm 2 mm, die At a temperature of 20 and a molding cycle of about 40 seconds, a test tubular preform having a height of 165 mm, a tube outer diameter of 29.0 mm, an average wall thickness of 3.7 mm, and a basis weight of 60 g was injection-molded.
- This preform was placed in a near-infrared ray irradiator equipped with a quartz heater, and under constant power, each preform was subjected to 56, 58, 60, 62, 64, 66, 68, and 70 seconds, respectively. After heating for each heating time, leave it at room temperature for 25 seconds, then immediately insert it in a mold adjusted to 160 ° C, stretch it in the height direction of the bottle with a stretching rod, and blow at about 7 kg / cm 2 After blowing for 1 second at about 30 kg / cm 2 for about 5 seconds, it was held for 5 seconds while applying the blowing pressure. The molded product was taken out by air cooling, and a bottle with an average body thickness of 350 / zm and a capacity of about 1.5 L was obtained.
- the heat resistance of these bottles was evaluated as follows. That is, store at 23 ° (: 50% humidity for one week), then fill the bottle with 90 ° C hot water at room temperature, then seal it tightly. After lying down for 1 minute, it was erected for 5 minutes, and then cooled in 10 pieces of water for 20 minutes. The shape of the bottle was visually observed. A sample with good heat resistance with no change in shape was marked with a “ ⁇ ”. A slight deformation of the body was recognized but no problem was observed with a“ ⁇ ”. The specimens with poor heat resistance were marked with “ ⁇ ”, and those with severe deformation of the trunk with extremely poor heat resistance were marked with “X”. Based on the above evaluations, the minimum heating time of the preformed body was defined as Tmin (second), whereby a bottle having both “ ⁇ ” and “ ⁇ ” in both transparency and heat resistance was obtained. The shorter the Tmin, the more efficiently bottles can be obtained.
- a slurry preparation tank consisting of one stirring tank, an esterification reaction tank consisting of two stirring tanks connected in series, and a stirring tank followed by two horizontal plug flow type reaction tanks Polyester was continuously produced using a continuous polymerization apparatus composed of a total of three melt polycondensation reaction tanks.
- the reaction conditions of the esterification reactor were as follows: the first stage 2 was a nitrogen atmosphere, 260 ° C, relative pressure 50 KPa (0.5 kg / cm 2 G), average residence time 4 hours, The second stage 3 was also performed under a nitrogen atmosphere at 260 ° C, 5 KPa (0.05 kg / cm 2 G), and an average residence time of 1.5 hours.
- the esterification ratio of the first stage of esterification was 85%, and the esterification ratio of the second stage of esterification was 95%.
- the esterification reaction product was continuously fed via line 5 to the melt polycondensation reactor.
- the esterification reaction product contains an ethylene glycol solution (concentration of tetrabutyl titanate in an amount of 2.0 ppm as titanium atom remaining for 1 kg of the produced polyester resin). 0.2% by weight) and an ethylene glycol solution of antimony trioxide (concentration: 1.9% by weight) was added continuously via conduit 4 in an amount of 90 ppm remaining as antimony atoms to 1 kg of the produced polyester resin. .
- the reaction conditions of the melt polycondensation reactor are as follows: the first stage is 270 ° (absolute pressure: 2.6 KPa (20 Torr), the average residence time is 1.2 hours, the second stage is 278 ° C , Absolute pressure 0.5KPa (4 Torr), average residence time 1.2 hours, 3rd stage 8 is 280, absolute pressure 0.3KPa (2 To rr), average residence time 1.2 hours
- the product of the melt polycondensation reaction was extruded from a die into a strand, cooled and solidified, cut with a cutter into a melt-polymerized chip having an average particle weight of 24 mg. It was 60 dl / g.
- the chips are continuously supplied to a crystallizer maintained at about 160 in a nitrogen atmosphere, maintained for about 60 minutes with stirring, and then passed through a preheater to a tower-type solid-state polycondensation apparatus. , And subjected to a solid-phase polycondensation reaction at 205 under a nitrogen atmosphere.
- the elution amount of antimony, intrinsic viscosity, diethylene glycol copolymerization amount, acetoaldehyde content, number of carboxylic acid terminals, and color coordinate b value of the obtained solid-phase polycondensation chip were measured by the above-mentioned methods.
- the obtained solid-phase polymerization chip was dried in an inert open (ESPEC IPHH-201) under a nitrogen flow of 40 liters at 160 for 4 hours.
- ESPEC IPHH-201 inert open
- M- 70 AII-DMJ a cylinder temperature of 280
- the back pressure 5 X 10 5 P a injection rate 40 cc Z seconds
- holding pressure 35 X 10 5 P a mold temperature 25
- the molding cycle In about 75 seconds
- G is a gate portion.
- the obtained molded plate was measured for the acetoaldehyde content and the temperature-reducing crystallization temperature by the above-mentioned method, and the results were tabulated. 3 is shown.
- the obtained solid-phase polymerization chip was subjected to potter molding evaluation.
- the shortest heating time of the preform during molding was as short as 60 seconds, and a bottle with both transparency and heat resistance could be efficiently obtained with high productivity.
- Table 2 shows the analysis values and evaluation results.
- a polyester resin chip was obtained in the same manner as in Example 2-1 except that the catalyst was added so that the amount of the remaining catalyst-derived elements was as shown in Table 1.
- Table 2 shows the analysis values and evaluation results.
- Ethylene glycol tetrahydrate was added to slurry preparation tank 1 without adding ethyl phosphate to the first stage of esterification so that the amount of magnesium acetate tetrahydrate was 27 ppm per 1 kg of polyester resin produced.
- the solution was added continuously, and in the second stage of esterification, an ethylene glycol solution of phosphoric acid was added continuously in such an amount that the amount of phosphorus atoms would be 26 ppm per kg of the produced polyester resin.
- an ethylene glycol solution of antimony trioxide in an amount of 81 ppm as antimony atom for 1 kg of the produced polyester resin, and as an atom of titanium for 1 kg of the produced polyester resin.
- This chip was subjected to solid-state polycondensation reaction in the same manner as in Example 2-1.
- Table 2 shows the analysis values and evaluation results of the obtained resin.
- the resin of this example has a lower intrinsic viscosity, higher diethylene glycol, AA, AV, and b values than those of the examples, and both polymerizability and quality are deteriorated.
- the shortest heating time of the preform at the time of molding was as long as 70 seconds, and the productivity was low and potting could not be obtained efficiently.
- the amount of ethylene glycol solution of ethyl phosphate added to the slurry preparation tank 1 was adjusted to 90 ppm of phosphorus atoms per 1 kg of the polyester resin produced. Without adding salt, in the middle of conduit 5, the esterification reaction product was mixed with magnesium acetate tetrahydrate and antimony trioxide and dissolved in ethylene glycol to produce a melt-polymerized polyester resin 1 kg
- the melt polymerization was carried out in the same manner as in Example 2-1 except that the magnesium atom and the antimony atom were added continuously through conduit 4 so that 57 ppm and 180 ppm of antimony atoms remained. I got a chip.
- the intrinsic viscosity of the obtained melt-polymerized chip was 0.58 dl / g.
- This chip was subjected to a solid-phase polycondensation reaction in the same manner as in Example 2-1.
- Table 2 shows the analysis values of the obtained PET resin and the evaluation results of bottle molding.
- T min seconds
- a polyester resin chip was obtained in the same manner as in Example 2-1 except that the amount of the copolymer component and the amount of the remaining catalyst-derived atoms were as shown in Table 2.
- Table 2 shows the analysis values and evaluation results of the obtained chips.
- Tmin seconds
- Carponic acid terminal number (A-B) X 0.01 XFX 1000 / W
- the temperature was raised to the crystallization temperature (T C1 ). Then, after maintaining the melting state at 2851: for 5 minutes, the temperature was lowered to 20 at a rate of 10 ° C / min, and the crystallization exothermic peak temperature observed on the way was measured and the cooling crystallization temperature (T C2 ).
- a sample cut out from a 4 mm thick part (C part in Fig. 1) of the molded plate was 1,100-500 in ABS mode using a double beam spectrophotometer (“U-2000” manufactured by Hitachi, Ltd.). The range of nm was measured at a scan speed of 200 nmZ, and the value at 1,000 nm was taken as the absorbance. Gu Haze>
- the haze meter (“NDH-300 Aj” manufactured by Nippon Denshoku Industries Co., Ltd.) was measured for a 5 mm thick portion (C portion in FIG. 1) of the molded plate.
- An injection molded plate with a length of 50 mm, a width of 6 mm and a thickness of 1 mm is fixed along the outer circumference of a cylindrical body with a diameter of 32 mm, with both ends in the length direction of the formed plate fixed over half the circumference of the outer circumference of the cylindrical body.
- the sample was immersed in a 2% by weight aqueous sodium hydroxide solution, and the time until cracks were generated was measured. The number of test points was 5, and the maximum value and the minimum value were averaged for the three cut points.
- Distilled water adjusted to 0 ° C was added to 18.8 g of citrate monohydrate to dissolve it, and then the entire aqueous solution was filled in a bottle, and 22.5 g of sodium bicarbonate was further added. Thereafter, the container was capped immediately and shaken for several tens of seconds to dissolve sodium bicarbonate. At this time, the inside of the bottle is equivalent to a state in which approximately 40 times the volume of carbon dioxide gas has been filled at 0 ⁇ ⁇ and 1 atm. Subsequently, after leaving the filled bottle for one day and night, the lower part of the bottle was immersed in a 0.2% by weight aqueous sodium hydroxide solution, and the appearance of gas leakage from the bottom was visually observed. The time until the leak occurred was relatively compared, and “ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ” was assigned in order from the one that took the longest time.
- a slurry of 13 kg of high-purity terephthalic acid with an average particle diameter of 120 m and 5.21 kg of ethylene glycol was charged in advance with 0.3 kg of bis (2-hydroxyethyl) terephthalate at a temperature of 265 ° C. pressure: 1. sequentially fed over 5 hours 1.
- esterification reaction tank held in 5X 10 5 P a performs an esterification reaction also over an additional 0.5 hours after the completion of the supply, this esterification reaction Half of the product was transferred to the polycondensation tank. The water generated during the esterification reaction was distilled out of the system, and the ethylene dalicol component was distilled back into the system.
- the polyester resin chips obtained above were continuously supplied into a stirring crystallizer (manufactured by Bepex) held at 150 to crystallize the chips, and then the solid-state polymerization column was allowed to stand still. And dried under a nitrogen gas flow of 20 liters of Zkg ⁇ hr at about 140 for 3 hours, followed by solid-phase polycondensation at 210 ° C. for 20 hours.
- a stirring crystallizer manufactured by Bepex
- the composition of the amount of antimony eluted, the ratio of isophthalic acid as a dicarboxylic acid component to the total dicarboxylic acid component, and the ratio of diethylene glycol as the diol component to the total diol component were determined by the above-described methods. , Carboxylic acid terminal content, metal atom content, acetoaldehyde content, and intrinsic viscosity of each metal compound were measured. The results are shown in Table 3.
- polyester resin chips were dried in an inert oven (E-spec H ⁇ -201 type) at 160 ° C for 4 hours under a nitrogen flow of 40 liters, followed by injection molding. at (Meiki Co. "M- 70A II- DM") at a cylinder temperature of 280 ° C, a back pressure 5 X 10 5 P a, the injection rate 40 cc / sec, holding pressure 35 X 10 5 P a, gold
- the shape shown in Fig. 1 has a height of 50 mm, a width of 100 mm, and a horizontal step of 6 mm to 3.5 mm with a step of 0.5 mm in 0.5 steps.
- a stepped plate having a thickness was injection-molded (G is a gate in FIG. 1).
- the heating crystallization temperature and the cooling crystallization temperature, the acetate aldehyde content, the absorbance, and the haze as an index of the transparency were measured by the above-mentioned methods, and the results were shown in Table 3. Indicated.
- the obtained polyester resin chip was dried in an inert oven (ESPEC “I PH H-201 type”) under a nitrogen flow of 40 l / min 4 for 4 hours. at Sumitomo Heavy Industries Co., Ltd. "mini mat 8/7 A”) at a cylinder temperature of 28 0 ° C, a back pressure 3 X 10 5 P a, the injection rate 3 cc Z seconds, holding pressure 20 X 10 5 P a, At a mold temperature of 20, a molded plate 50 mm long, 6 mm wide and 1 mm thick was injection molded. The obtained molded plate The environmental stress rupture time was measured by the method described above, and the results are shown in Table 3.
- polyester resin chip was dried in a vacuum dryer at 130 ° C. for 10 hours, and then in an injection molding machine (“FE-80S” manufactured by Nissei Plastic Industry Co., Ltd.).
- cylinder first temperature 2 8 0T back pressure 5 X 1 0 5 P a, emissivity 4 5 cc / sec, maintained pressure 3 0 X 1 0 5 P a , mold temperature 2 0 ° C, the molding cycle of about 40 seconds Approximately 29mm in outer diameter, about 16.5m.m in height, about 3.7mm in average wall thickness, and about 60g in weight.
- the preform was heated in a near-infrared irradiation furnace equipped with a quartz heater for 70 seconds, allowed to stand at room temperature for 25 seconds, then placed in a blow mold set at 40 ° C, and stretched with a stretching rod in the height direction.
- a stretched, one second blow pressure 7 X 1 0 5 P a, by Rukoto be further blown for 40 seconds at 30 X 1 0 5 P a, an outer diameter of about 9 5 mm, a height of approximately 30 5 mm, cylinder Average thickness of section 0.37 mm, weight about 6
- a bottle of 0 g and an internal volume of about 1.5 liter was formed.
- the resulting bottle was evaluated for environmental stress cracking resistance by the above-described method, and the results are shown in Table 3.
- Example 3-3 a polyester resin was prepared in the same manner as in Example 3-1 except that 0.29 g of iron tetroxide (“HR-370 Hj” manufactured by Toda Kogyo) was added. A chip was manufactured, and the obtained polyester resin was measured and evaluated, and the results are shown in Table 3.
- HR-370 Hj iron tetroxide
- Example 3 Except using 12.8 kg of terephthalic acid and 0.2 kg of isophthalic acid, a polyester resin chip was manufactured in the same manner as in Example 3-2, and the obtained polyester resin was measured and evaluated. Are shown in Table 3.
- a slurry of 13 kg of high-purity terephthalic acid having an average particle diameter of 120 m and 12.2 kg of ethylene glycol was previously charged with 0.3 kg of bis (2-hydroxyethyl) terephthalate, and the temperature was 2 50 ° C, successively fed over pressure 1. 0 X 1 0 5 4 hours to an esterification reaction vessel held in the P a, after completion of the supply even over an additional 1 hour perform esterification reaction, the esterification reaction Half of the product was transferred to the polycondensation tank. In addition, all the water and ethyl blendy alcohol components generated during the esterification reaction were distilled out of the system.
- the piping was connected to the polycondensation tank to which the esterification reaction product had been transferred.
- the ethylene phosphate solution of acid phosphate and the ethylene glycol solution of antimony trioxide give 12 ppm of phosphorus atoms (P) and 240 ppm of antimony atoms (Sb) to the resulting polyester resin.
- the temperature inside the system was gradually increased from 250 to 278 ° C, and the pressure was reduced from normal pressure to 67 Pa, and the reaction was continued for 3 hours while maintaining the same pressure.
- the resulting polymer was drawn out in a strand form from a discharge port provided at the bottom of the polycondensation tank, cooled with water, and then cut into chips to produce a polyester resin chip. After that, solid-phase polycondensation was carried out in the same manner as in Example 3-1.
- the obtained polyester resin was measured and evaluated. The results are shown in Table 3.
- a polyester resin chip was produced in the same manner as in Comparative Example 3_1 except that 110 g of diethylene glycol was added, and the obtained polyester resin was measured and evaluated. Table 3 shows the results.
- a slurry of 13 kg of high-purity terephthalic acid having an average particle diameter of 50; ttm and 12.2 kg of ethylene glycol was previously charged with 0.3 kg of bis (2-hydroxyethyl) terephthalate at a temperature of 250 ° C.
- the esterification reaction tank was maintained at a pressure of 1.0 ⁇ 10 5 Pa and was supplied sequentially over 3.5 hours.After the supply was completed, the esterification reaction was continued for another 1 hour. Was transferred to the polycondensation tank. The water and ethylene dalicol components generated during the esterification reaction were all distilled out of the system.
- an ethylene glycol solution of ethyl phosphate, an ethylene glycol solution of antimony trioxide, and a water / ethylene glycol solution of magnesium acetate tetrahydrate were supplied from the piping to the polycondensation tank to which the esterification reaction product was transferred.
- the temperature inside the system was gradually increased from 250 ° C to 278 ° C, and the pressure was reduced from normal pressure to 67 Pa, and the reaction was carried out for 3 hours while maintaining the same pressure.
- a 3.5 mm thick part (A in Fig. 1) of the molded plate was cut out, dried at 40 ° C for 3 days in a vacuum drier, and the sample cut out from the non-surface part was used.
- DSC220C differential scanning calorimeter
- the observed peak temperature of the exothermic crystallization was measured and defined as the elevated crystallization temperature (Te1). Thereafter, after maintaining the molten state at 285T: for 5 minutes, the temperature was decreased to 2 Ot at a rate of 10 ° C / min, and the crystallization exothermic peak temperature observed during the measurement was measured. (Tc 2).
- the polyester resin chips obtained above were continuously supplied into a stirring crystallization machine (manufactured by Bepex) maintained at about 160 T: so that the residence time was about 5 minutes, and crystallization was performed. After drying in an inert oven (ES PEC “I PHH-201”) under a nitrogen flow of 40 liters Z for 4 hours at 160, the intrinsic viscosity at 210 ⁇ is 0.839 d The solid phase polycondensation was performed by heating for 1 hour.
- ES PEC “I PHH-201” inert oven
- the amount of antimony eluted, the content of metal atoms in each metal compound, the intrinsic viscosity, the content of acetoaldehyde, and the color coordinate b as a color tone were measured, and the results are shown in Table 4. .
- polyester resin composition chip After drying the obtained polyester resin composition chip in an inert open (E 1111 [“-201 type” manufactured by E SPEC) under a nitrogen stream of 40 liters / min at 160 ⁇ for 4 hours, , by an injection molding machine (Meiki Co. "M- 70A II -DMJ), at a cylinder temperature of 280, the back pressure 5X 10 5 P a, injection rate 40 cc sec, holding pressure 35 X 10 5 P a, gold With a mold temperature of 25 and a molding cycle of about 75 seconds, stepped molding with the shape shown in Fig.
- E 1111 “-201 type” manufactured by E SPEC
- M- 70A II -DMJ injection molding machine
- the plate was injection-molded (in FIG. 1, G is a gate portion.)
- the obtained molded plate was subjected to the above-mentioned methods by the cyclic trimer content, the acetoaldehyde content, and the temperature-induced crystallization. The temperature, the crystallization temperature, and the haze as transparency were measured. The results are shown in Table 4.
- the obtained polyester resin composition chips are placed in a vacuum dryer at 130 ° C for 10 hours.
- an injection molding machine Nei Plastic Industrial Co., Ltd. "FE- 80 S”
- FE- 80 S injection molding machine
- a cylinder temperature of 28 Ot back pressure 5 X 10 5 P a
- the injection rate 45 cc / sec holding pressure 30 X 10 5 Pa
- mold temperature 20 molding cycle about 40 seconds
- outer diameter about 29 mm height about 165 mm
- average wall thickness about 3.7 mm
- preform of test specimen Preform
- the plug part of the obtained preform was heated for 150 to 180 seconds by a quartz heater type plug part crystallizer, and a mold pin was inserted to perform crystallization treatment of the plug part.
- the shape and dimensions were visually observed and evaluated according to the following criteria. The results are shown in Table 4.
- the preform having the stopper portion crystallized is heated in a near-infrared irradiation furnace equipped with a quartz heater for 70 seconds, left at room temperature for 25 seconds, and then placed in a blow mold set at 16. It was charged, while stretching in the height direction at a draw rod, one second blow pressure 7 X 10 5 P a, further to 30X 10 5 and one 40 seconds pro molded at P a, by air cooling in Hitose' Bok A bottle with an outer diameter of about 95 mm, a height of about 305 mm, an average body thickness of about 0.37 mm, a weight of about 60 g, an internal volume of about 1.5 liters, and a specific surface area of about 0.7 cm-1 was molded. The external appearance of the obtained bottle was visually observed and evaluated according to the following criteria. Further, the amount of hot water eluted by the antimony compound was measured by the method described above, and the results are shown in Table 4.
- a polyester resin was produced in the same manner as in Example 41-11, and the amount of antimony eluted as the polyester resin, the ratio of ethylene terephthalate unit, The metal atom content, intrinsic viscosity, antimony elution amount, cyclic trimer content, acetaldehyde content, and color tone of the polyester resin were measured, and the stepped plate was injection molded.
- Cyclic trimer content Measure the weight, temperature rise crystallization temperature, temperature fall crystallization temperature, and transparency.Injection blow-mold the bottle, evaluate the stopper shape, and the bottle appearance, measure the amount of antimony eluted, and check the results. It is shown in Table 4.
- a polyester resin was produced in the same manner as in Example 4-1 except that a low-density polyethylene resin was added so as to be 1500 ppm based on the weight of the polyester resin.
- Antimony elution amount, ratio of ethylene terephthalate units, metal atom content, intrinsic viscosity, and antimony elution amount, cyclic trimer content, acetaldehyde content, and color tone of polyester resin Measure and injection-mold the stepped plate, measure the cyclic trimer content, acetoaldehyde content, heated and cooled crystallization temperature, and transparency, and then inject the bottle Blow molding was performed, the stopper shape and the appearance of the port were evaluated, and the amount of antimony eluted was measured. The results are shown in Table 4.
- That orthophosphoric acid was used as the phosphorus compound during the melt polycondensation, that the amounts of orthophosphoric acid, antimony trioxide and magnesium acetate were changed, and that tetra-n-butoxytitanium was not added; Except that diethylene glycol and low-density polyethylene resin were not added, a polyester resin composition was produced in the same manner as in Example 411, and the proportion of ethylene terephthalate units as the polyester resin, Measure the atomic content, intrinsic viscosity, antimony elution amount, cyclic trimer content, acetoaldehyde content, and color tone of the polyester resin, and injection molding a stepped plate, and cyclic trimming.
- DEG copolymerization amount (moltt 0.4 Resin physical properties Intrinsic viscosity (dl / g) 0.839 0.820 Cyclic trimer content (CTo) 0.30 0.31
- the polyester resin of the present invention can be molded without deteriorating transparency even at a molding temperature lower than before, generation of acetoaldehyde during molding and mold contamination during molding are particularly suppressed. As well as a molded article with excellent transparency, suitable for hollow containers. Show that
- the resin obtained in each of the examples was dried in a vacuum dryer (“DP-41” manufactured by Yamato Scientific Co., Ltd.) at 160 for 16 hours or more, and then injected with an injection molding machine (Meiki at Seisakusho "M- 70 AII-DM") at a cylinder temperature of 270, the back pressure 5 X 1 0 5 P a, the injection rate 40 cc / sec, maintained pressure 3 5 X 1 0 5 P a , the mold Temperature: 25 ° C, molding cycle: about 75 seconds, the shape shown in Fig. 1 is 50mm long, 100mm wide, 6 steps from 6mm to 3.5mm in horizontal direction, 0.5mm step Was injection molded.
- G is a gate.
- the haze meter (“NDH-300A” manufactured by Nippon Denshoku Co., Ltd.) was measured for a 5.0 mm thickness (C portion in FIG. 1) of the molded plate.
- the obtained film is peeled off at the bonding surface during tubular molding to expose a clean surface, which is used as a microscopic sample.
- the measurement operation was performed as follows.
- the image processing device captures the image while performing focus scanning from the front side to the back side in the grayscale image accumulation input mode, and counts particles with an absolute maximum length of 1 m or more.
- Test solution 1 1 with a micro syringe
- the sample was injected into a gas chromatograph (model GC-14APF) by Shimadzu Corporation, and from the area of the peak, the mole% of the diethylene glycol component relative to the total glycol component was calculated according to the following formula.
- AGO Area of diethylene glycol component ( ⁇ ⁇ sec)
- A Area of each glycol component (; V ⁇ sec)
- ⁇ is the amount of 0.1 N caustic soda in benzyl alcohol required for titration (1)
- B is the amount of 0.1 N caustic soda in benzyl alcohol required for blank titration ( l)
- W are the amounts of the polyester resin sample (g) and f is the titer of the benzyl alcohol solution of 0.1 IN caustic soda.
- the titer (f) of 0.1 N caustic soda benzyl alcohol solution was determined by collecting 5 ml of methanol in a test tube, adding 1 to 2 drops of phenol red ethanol solution as an indicator, and The solution was titrated with 0.4 ml of benzyl alcohol solution of N caustic soda to the color change point, then 0.2 ml of 0.1 N hydrochloric acid aqueous solution with a known titer was taken as a standard solution, and added again.
- the titer (f) was calculated by the following equation.
- Titer (f) Titer of 0.1 N hydrochloric acid aqueous solution X 0.1 Amount of 1 N hydrochloric acid aqueous solution collected in ⁇ ) / Titration of 0.1 N caustic soda in benzyl alcohol (1)
- 15 g of a sample was placed in a test tube with a branch having an inner diameter of 20 mm and a length of 18 cm, and after sufficiently replacing the inside of the system with nitrogen, the test was immersed in an oil bath at 160 ° C and vacuum pumped. The inside of the tube was made 1 Torr or less, and dried under vacuum for 4 hours. After that, the pass temperature was raised to 285 ° C, and after melting the sample, repeated nitrogen depressurization and depressurization were carried out to remove mixed air bubbles, and a stainless steel electrode (1 cm 2 area) was placed in the melt.
- An unstretched film was formed by tubular molding in the same manner as the method described in the section for measuring the number of particles inside the resin.
- the obtained unstretched film was stretched and heat-set with a biaxial stretching machine manufactured by TM Long under the following conditions to obtain a biaxially stretched film.
- Preheating and heat setting temperature setting 92
- the obtained biaxially stretched film is affixed to a SUS square metal frame, aluminum is vapor-deposited on the film surface in a vacuum vapor deposition machine, and a 2 cm x 2.5 cm frame is randomly marked on the surface.
- the number of coarse protrusions was observed with a two-beam microscope using a light source obtained by applying a G filter to white light of a halogen lamp.
- the coarse projections appear as contour lines in which the interference fringes are closed, and the higher the projection height, the greater the number of such contour lines. Get higher.
- the number was visually counted and converted into the number in the film surface of 10 cm 2 to obtain the number of coarse surface projections in the film.
- L 1 means that the height is less than 0.27 ⁇ ⁇ 0.54 ⁇
- L2 means that the height is less than 0.54 // m-0.81 / zm
- polyester resin chip After drying the polyester resin chip, it is fed to an extruder type spinning machine, and is continuously discharged for 48 hours at a spinning temperature of 295 using a 0.6 mm diameter round die. Was visually checked for adhesion of the base stain.
- a slurry preparation tank consisting of one stirring tank shown in Fig. 2 and a slurry preparation tank consisting of two stirring tanks connected in series Using a continuous polymerization apparatus consisting of a total of three melt polycondensation reaction tanks consisting of an esterification reaction tank and a stirring tank followed by two horizontal plug flow type reaction tanks. One batch was manufactured continuously.
- magnesium acetate tetrahydrate was continuously supplied from the upper piping installed in the second stage 3 of the esterification reactor, in an amount that left 30 ppm of magnesium atoms per 1 kg of the produced polyester resin as magnesium atoms.
- the esterification reaction product is continuously supplied via conduit 5 to the first stage 6 of the melt polycondensation reactor, then to the second stage 7 of the melt polycondensation reactor, and then to the third stage 8 of the melt polycondensation reactor. did.
- the esterification reaction product contains tetrabutyltyl titanate in an amount of 2.0 ppm remaining as titanium atoms for 1 kg of the produced polyester resin, and antimony atom for 1 kg of the produced polyester resin.
- the remaining amount of antimony trioxide was added continuously via conduit 4 as 90 ppm.
- the reaction conditions of the melt polycondensation reactor were as follows: the first stage was at a temperature of 270 and an absolute pressure of 2.6 KPa (2 OTo rr), and the second stage was at a temperature of 278 and an absolute pressure of 0.5 KPa (4 To rr) In the third stage, the temperature was 28 O: and the absolute pressure was about 0.3 KPa (2 To rr), and the total polymerization time was 3 hours and 30 minutes.
- the product of the melt polycondensation reaction was extruded from a die into a strand, cooled and solidified, and cut into pieces to obtain a molten polymer chip having an average weight of 24 mg.
- the intrinsic viscosity of this chip is 0.65 dLZg, the number of particles inside the resin is 5.5 / 0.01 mm 3 , the content of the ethylene glycol component is 1.5 mol% based on all diol components, and the number of carboxylic acid terminals was 35 equivalents_t, and the b-value in Hunter color coordinates was 1.5.
- the obtained chip The tape was subjected to measurement of volume resistivity, evaluation of film forming, and evaluation of fiber forming. Table 5 shows the analysis values and evaluation results.
- Example 5-1 The same operation as in Example 5-1 was carried out except that the amount of ethyl phosphate added was adjusted to the residual amount shown in Table 5 as phosphorus atoms per 1 kg of the produced polyester resin. Thus, a polyester resin was obtained. Table 5 shows the analysis values and evaluation results.
- Example 5 shows the analysis values and evaluation results.
- Example 5-1 The same operation as in Example 5-1 was carried out except that the amount of magnesium acetate tetrahydrate to be added was changed to magnesium atoms per 1 kg of the produced polyester resin so that the remaining amount was as shown in Table 5. A polyester resin was obtained. Table 5 shows the analysis values and evaluation results.
- a polyester resin was obtained in the same manner as in Example 5-1 except that the type of phosphorus compound to be added was orthophosphoric acid. Table 5 shows the analysis values and evaluation results.
- a first esterification reactor equipped with a stirrer, a decomposer, a raw material charging port and a product take-out slot
- the inside of the reaction vessel was divided into two tanks, and each reaction tank was equipped with a stirrer
- a three-stage complete mixing tank type continuous esterification reactor comprising a second esterification reactor equipped with a separator, a raw material charging port and a product outlet was used.
- the EG of TPA adjusted to a molar ratio of EG to TPA of 1.7 The slurry was fed continuously.
- an EG solution of magnesium acetate tetrahydrate was added from a supply port different from the TPA EG slurry supply port to 0.82 moles of Mg atoms per ton of the produced polyester resin (about 20 p pm), and the reaction was carried out at normal pressure and an average residence time of 4 hours at a temperature of 255 ° C.
- the reaction product was continuously taken out of the system, supplied to the first tank of the second esterification reactor, and continuously taken out of the second tank. The transfer from the first tank to the second tank adopted the overflow method.
- Phosphoric acid EG solution in an amount of 0.16 mol (about 5 ppm) as P atoms per ton of polyester resin generated from the supply port on the inlet side of the first tank, supply port of the second tank
- An EG solution of phosphoric acid was continuously added in such an amount that 0.60 mol (about 19 13111) of P atoms per ton of the produced polyester resin was obtained, and the average residence time of each tank at normal pressure 2.
- the reaction was carried out at a temperature of 260 for 5 hours.
- the esterification reaction product is continuously taken out from the second esterification reactor, and continuously fed to a two-stage continuous polycondensation reactor equipped with a stirrer, a decomposer, a raw material charging port, and a product outlet. Supplied.
- an EG solution of antimony trioxide in an amount of 0.66 mol (about 80 ppm) as Sb atom per ton of the produced polyester resin
- an EG solution of tetrabutyl titanate was supplied to the esterification reaction product in such an amount that 0.06 mol (approximately 3 ppm) of Ti atom per 1 ton of the produced polyester resin was supplied to the esterification reaction product.
- Polycondensation was carried out at about 270 ° (: reduced pressure in a condensation reactor. The total polymerization time was 3 hours and 19 minutes.
- the molten polycondensation reaction product was extruded from a die into strands, cooled and solidified, Each chip was cut with a cutter to give a melt-polymerized chip with an average weight of 24 mg
- This chip has an intrinsic viscosity of 0.52 dl / g, resin has 5.5 particles / 01 mm 3 , and contains diethylene glycol component The amount is based on all diol components 2. 8 mol%, the number of carboxylic acid terminals was 30 equivalents / t, and the b value in Hunter color coordinates was 1.0.
- the obtained chips were measured for volume resistivity, film forming evaluation, and fiber forming. Table 5 shows the analytical values and evaluation results.
- TMP trimethyl phosphate
- melt polycondensation reaction product was extruded from a die into a strand, cooled and solidified, and cut with a cutter to give a melt polymerized chip having an average weight of 24 mg.
- the obtained chips were subjected to measurement of volume resistivity, evaluation of film forming, and evaluation of fiber forming. Table 5 shows the analysis values and evaluation results.
- TMP P content (TMP) (nnm) 0 0 0
- TMP P content
- a polyester resin polycondensed in the presence of an antimony compound, the polyester resin having a reduced elution amount of antimony, and the production of a polyester resin capable of suitably obtaining the polyester resin A method can be provided.
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2002226728A AU2002226728B2 (en) | 2001-01-25 | 2002-01-25 | Polyester resin, molded article thereof, and process for producing polyester resin |
EP02716389A EP1281725A4 (en) | 2001-01-25 | 2002-01-25 | POLYESTER RESIN, MOLDED ARTICLE BASED ON THIS POLYESTER RESIN, AND PROCESS FOR PRODUCING THE POLYESTER RESIN |
US10/252,509 US6703474B2 (en) | 2001-01-25 | 2002-09-24 | Polyester resin, molded product made thereof and process for production of polyester resin |
US10/644,980 US7048995B2 (en) | 2001-01-25 | 2003-08-21 | Polyester resin, molded product made thereof and process for production of polyester resin |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2001016535 | 2001-01-25 | ||
JP2001-16535 | 2001-01-25 | ||
JP2001-297454 | 2001-09-27 | ||
JP2001297454 | 2001-09-27 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/252,509 Continuation US6703474B2 (en) | 2001-01-25 | 2002-09-24 | Polyester resin, molded product made thereof and process for production of polyester resin |
Publications (1)
Publication Number | Publication Date |
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WO2002059178A1 true WO2002059178A1 (fr) | 2002-08-01 |
Family
ID=26608258
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2002/000562 WO2002059178A1 (fr) | 2001-01-25 | 2002-01-25 | Resine polyester, article moule a base de cette resine polyester et procede permettant de produire cette resine polyester |
Country Status (6)
Country | Link |
---|---|
US (2) | US6703474B2 (ja) |
EP (1) | EP1281725A4 (ja) |
KR (1) | KR100844304B1 (ja) |
CN (1) | CN1271111C (ja) |
AU (1) | AU2002226728B2 (ja) |
WO (1) | WO2002059178A1 (ja) |
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007246923A (ja) * | 2007-06-19 | 2007-09-27 | Mitsubishi Chemicals Corp | ポリエステル樹脂及びこれから得られる成型体 |
CN105462187A (zh) * | 2014-09-10 | 2016-04-06 | 东丽纤维研究所(中国)有限公司 | 一种聚酯组合物及其制备方法和用途 |
CN105462187B (zh) * | 2014-09-10 | 2019-05-21 | 东丽纤维研究所(中国)有限公司 | 一种聚酯组合物及其制备方法和用途 |
CN105670233A (zh) * | 2014-11-18 | 2016-06-15 | 东丽纤维研究所(中国)有限公司 | 一种聚酯组合物及其制备方法和用途 |
CN105670233B (zh) * | 2014-11-18 | 2019-05-21 | 东丽纤维研究所(中国)有限公司 | 一种聚酯组合物及其制备方法和用途 |
WO2020097879A1 (zh) * | 2018-11-15 | 2020-05-22 | 中国科学院大连化学物理研究所 | 一种聚酯多元醇的制备方法 |
RU2780027C1 (ru) * | 2018-11-15 | 2022-09-19 | Далянь Инститьют Оф Кемикал Физикс, Чайниз Академи Оф Сайэнс | Способ получения полиэфирполиола |
Also Published As
Publication number | Publication date |
---|---|
EP1281725A1 (en) | 2003-02-05 |
US6703474B2 (en) | 2004-03-09 |
CN1455793A (zh) | 2003-11-12 |
EP1281725A4 (en) | 2005-04-06 |
US20030144459A1 (en) | 2003-07-31 |
US7048995B2 (en) | 2006-05-23 |
KR20020087424A (ko) | 2002-11-22 |
AU2002226728B2 (en) | 2007-07-26 |
KR100844304B1 (ko) | 2008-07-07 |
CN1271111C (zh) | 2006-08-23 |
US20040086733A1 (en) | 2004-05-06 |
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