WO2013168804A1 - 環状アセタール骨格を有するポリエステル樹脂の製造方法 - Google Patents
環状アセタール骨格を有するポリエステル樹脂の製造方法 Download PDFInfo
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- WO2013168804A1 WO2013168804A1 PCT/JP2013/063195 JP2013063195W WO2013168804A1 WO 2013168804 A1 WO2013168804 A1 WO 2013168804A1 JP 2013063195 W JP2013063195 W JP 2013063195W WO 2013168804 A1 WO2013168804 A1 WO 2013168804A1
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- diol
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- cyclic acetal
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
- C08G63/18—Dicarboxylic acids and dihydroxy compounds the acids or hydroxy compounds containing carbocyclic rings
- C08G63/181—Acids containing aromatic rings
-
- 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
- C08G63/66—Polyesters containing oxygen in the form of ether groups
- C08G63/668—Polyesters containing oxygen in the form of ether groups derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/672—Dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/12—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from polycarboxylic acids and polyhydroxy compounds
- C08G63/16—Dicarboxylic acids and dihydroxy compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/82—Preparation processes characterised by the catalyst used
- C08G63/83—Alkali metals, alkaline earth metals, beryllium, magnesium, copper, silver, gold, zinc, cadmium, mercury, manganese, or compounds thereof
Definitions
- the present invention relates to a method for producing a polyester resin having a cyclic acetal skeleton.
- PET Polyethylene terephthalate
- modification of a polyester resin with a compound having a cyclic acetal skeleton can be mentioned.
- Specific examples thereof include PET modified with 3,9-bis (1,1-dimethyl-2-hydroxymethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane.
- Examples thereof also include a copolyester composed of terephthalic acid, 1,4-butanediol, and glycol having a cyclic acetal skeleton.
- skeleton as a monomer are mentioned.
- dicarboxylic acid or a bisalkyl ester of dicarboxylic acid is reacted with an excessive amount of diol to form a bishydroxyalkyl ester of dicarboxylic acid, and this bishydroxyalkyl ester is polycondensed under reduced pressure.
- the method of obtaining a polymer is common.
- a method for obtaining a bishydroxyalkyl ester from a dicarboxylic acid and a diol is called a “direct esterification method”
- a method for obtaining a bishydroxyalkyl ester from a bisalkyl of a dicarboxylic acid and a diol is called a “transesterification method”.
- the direct esterification method is considered advantageous over the transesterification method for the following reasons. That is, the reason is that (i) dicarboxylic acid (such as terephthalic acid) is less expensive than dicarboxylic acid bisalkyl ester (such as dimethyl terephthalate), and (ii) when obtaining dicarboxylic acid bishydroxyalkyl ester.
- the generated by-product is alcohol in the transesterification method, but water with a low environmental load in the direct ester method.
- Patent Document 1 discloses a method of transesterifying an ester having a defined amount of free carboxyl in an ester with a diol having a cyclic acetal skeleton.
- Patent Document 2 discloses a method of transesterifying a dicarboxylic acid bishydroxyalkyl ester having a defined acid value and a diol having a cyclic acetal skeleton in the presence of a basic compound.
- Patent Document 3 discloses a method of transesterifying a dicarboxylic acid bishydroxyalkyl ester having a defined acid value and a diol having a cyclic acetal skeleton in the presence of a titanium compound.
- the above-described production method is useful as a production method for a polyester resin having a cyclic acetal skeleton.
- a substance to be reacted with a diol having a cyclic acetal skeleton must be a dicarboxylic acid bishydroxyalkyl ester or an ester having a specific acid value.
- an additional step for producing the esters is required. Therefore, development of a manufacturing method that relaxes such restrictions and has a high degree of freedom in the manufacturing process is desired.
- the present invention has been made in view of the above circumstances, and as a method for producing a polyester resin comprising a dicarboxylic acid structural unit and a diol structural unit and having at least a structural unit having a cyclic acetal skeleton as the diol structural unit, It is an object of the present invention to provide a production method that has a high degree of freedom and that the obtained polyester resin has excellent physical properties.
- a diol (A) having a cyclic acetal skeleton, a bisalkyl ester of dicarboxylic acid (B), and a diol (C) having no cyclic acetal skeleton Is transesterified in the presence of a basic compound (D) to efficiently produce a polyester resin comprising a dicarboxylic acid structural unit and a diol structural unit, and having at least a structural unit having a cyclic acetal skeleton as the diol structural unit. We found that it can be manufactured.
- a method for producing a polyester resin comprising a dicarboxylic acid structural unit and a diol structural unit, and having at least a structural unit having a cyclic acetal skeleton as the diol structural unit, A step of reacting a diol (A) having a cyclic acetal skeleton, a dicarboxylic acid bisalkyl ester (B), and a diol (C) not having a cyclic acetal skeleton in the presence of a basic compound (D).
- a method for producing a polyester resin A method for producing a polyester resin.
- the component (D) is an alkali metal carbonate, an alkali metal hydroxide, an alkali metal carboxylate, an alkaline earth metal carbonate, an alkaline earth metal hydroxide, or an alkaline earth metal.
- the alkali metal carboxylate is composed of alkali metal formate, alkali metal acetate, alkali metal propionate, alkali metal butyrate, alkali metal isobutyrate, and alkali metal benzoate.
- R 1 and R 2 are each independently a divalent substituent, an aliphatic hydrocarbon group having 1 to 10 carbon atoms, an alicyclic hydrocarbon group having 3 to 10 carbon atoms, and It represents one selected from the group consisting of aromatic hydrocarbon groups having 6 to 10 carbon atoms.
- R 3 is a divalent substituent, an aliphatic hydrocarbon group having 1 to 10 carbon atoms, an alicyclic hydrocarbon group having 3 to 10 carbon atoms, and an aromatic group having 6 to 10 carbon atoms.
- R 4 represents any one selected from the group consisting of hydrocarbon groups, R 4 is a hydrogen atom or a monovalent substituent, and the monovalent substituent is an aliphatic hydrocarbon group having 1 to 10 carbon atoms, carbon This represents any one selected from the group consisting of alicyclic hydrocarbon groups having 3 to 10 carbon atoms and aromatic hydrocarbon groups having 6 to 10 carbon atoms.
- the component (A) is 3,9-bis (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane, 5-methylol-5-ethyl
- the method for producing a polyester resin according to any one of [1] to [5], which is -2- (1,1-dimethyl-2-hydroxyethyl) -1,3-dioxane, or both.
- the component (B) is at least one selected from the group consisting of dimethyl terephthalate, dimethyl isophthalate, and dimethyl 2,6-naphthalenedicarboxylate, any one of [1] to [6]
- the degree of freedom in the production process is high, and
- the obtained polyester resin can also provide a production method having excellent physical properties.
- the present embodiment a mode for carrying out the present invention (hereinafter simply referred to as “the present embodiment”) will be described in detail.
- the following embodiments are examples for explaining the present invention, and are not intended to limit the present invention to the following contents.
- the present invention can be implemented with appropriate modifications within the scope of the gist thereof.
- the production method of this embodiment is a method for producing a polyester resin comprising a dicarboxylic acid constitutional unit and a diol constitutional unit and having at least a constitutional unit having a cyclic acetal skeleton as a diol constitutional unit, which is a diol having a cyclic acetal skeleton
- a method for producing a polyester resin comprising a step of reacting A), a dicarboxylic acid bisalkyl ester (B), and a diol (C) having no cyclic acetal skeleton in the presence of a basic compound (D). .
- a conventionally known manufacturing apparatus used for manufacturing a polyester resin can be used as it is.
- the diol (A) having a cyclic acetal skeleton is preferably a compound represented by the formula (i), a compound represented by the formula (ii), or both.
- R 1 and R 2 are each independently a divalent substituent, an aliphatic hydrocarbon group having 1 to 10 carbon atoms, an alicyclic hydrocarbon group having 3 to 10 carbon atoms, and It represents one selected from the group consisting of aromatic hydrocarbon groups having 6 to 10 carbon atoms.
- R 3 is a divalent substituent, an aliphatic hydrocarbon group having 1 to 10 carbon atoms, an alicyclic hydrocarbon group having 3 to 10 carbon atoms, and an aromatic group having 6 to 10 carbon atoms.
- R 4 represents any one selected from the group consisting of hydrocarbon groups, R 4 is a hydrogen atom or a monovalent substituent, and the monovalent substituent is an aliphatic hydrocarbon group having 1 to 10 carbon atoms, a carbon number It represents one selected from the group consisting of 3 to 10 alicyclic hydrocarbon groups and aromatic hydrocarbon groups having 6 to 10 carbon atoms.
- component (A) is not particularly limited, but 3,9-bis (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5.5] undecane 5-methylol-5-ethyl-2- (1,1-dimethyl-2-hydroxyethyl) -1,3-dioxane, or both are more preferable.
- the diol (A) having a cyclic acetal skeleton may be used alone or in combination of two or more.
- the dicarboxylic acid bisalkyl ester (B) is not particularly limited, and examples thereof include succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedicarboxylic acid, cyclohexanedicarboxylic acid, and cyclodecanedicarboxylic acid.
- Acid decalin carboxylic acid, norbornane dicarboxylic acid, tricyclodecanedicarboxylic acid, bisalkyl ester of aliphatic dicarboxylic acid such as pentacyclopentadecanedicarboxylic acid; terephthalic acid, isophthalic acid, phthalic acid, 2-methylterephthalic acid, 1,4 -Bisalkyls of aromatic dicarboxylic acids such as naphthalenedicarboxylic acid, 1,5-naphthalenedicarboxylic acid, 2,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, biphenylcarboxylic acid, tetralindicarboxylic acid Ester, and the like.
- the bisalkyl ester is not particularly limited, and examples thereof include methyl ester, ethyl ester, propyl ester, isopropyl ester, butyl ester, isobutyl ester, and cyclohexyl ester.
- dimethyl terephthalate, dimethyl isophthalate, and dimethyl 2,6-naphthalenedicarboxylate are preferable, dimethyl terephthalate, and 2,6-naphthalene. More preferred is dimethyl dicarboxylate.
- dicarboxylic acid bisalkyl ester (B) may be used alone or in combination of two or more.
- monocarboxylic acids such as acetic acid, propionic acid, and butyric acid; monoalkyl esters or polyalkyl esters of trivalent or higher carboxylic acids such as trimellitic acid and pyromellitic acid are used within the range not impairing the object of the present embodiment. You can also.
- the dicarboxylic acid bisalkyl ester contains a small amount of acid mixed in in the production process.
- the acid value is used as an index of the acid content.
- the acid value of dimethyl terephthalate, one of the dicarboxylic acid bisalkyl esters, is usually about 0.030 KOH mg / g, and the acid value of dimethyl 2,6-naphthalenedicarboxylate is usually about 0.010 KOH mg / g.
- the acid value of the dicarboxylic acid bisalkyl ester is not limited, and thus the use of the dicarboxylic acid bisalkyl ester having a specific acid value as described above is not limited. From this viewpoint, it can be said that the manufacturing method of the present embodiment is a manufacturing method with a wide range of selection of raw materials and a high degree of freedom.
- the diol (C) having no cyclic acetal skeleton is not particularly limited.
- ethylene glycol is preferable from the viewpoints of mechanical properties of the obtained polyester resin and economics of the raw material.
- diol (C) having no cyclic acetal skeleton may be used alone or in combination of two or more.
- monoalcohols such as butyl alcohol, hexyl alcohol and octyl alcohol, and trihydric or higher polyhydric alcohols such as trimethylolpropane, glycerin and pentaerythritol may be used in combination as long as the purpose of the present embodiment is not impaired. it can.
- the diol (A) having a cyclic acetal skeleton, the dicarboxylic acid bisalkyl ester (B), and the diol (C) not having a cyclic acetal skeleton may be so-called monomers or oligomers.
- the basic compound (D) is used in the manufacturing method of this embodiment.
- a polyester resin having good physical properties can be obtained efficiently.
- the reason for this is not clear, but is presumed as follows.
- the decomposition of the cyclic acetal skeleton caused by the acid can be suppressed by using the component (D).
- the reaction is carried out under the condition in which the component (D) is not present, the cyclic acetal skeleton is decomposed and a trifunctional or higher polyfunctional monomer is generated.
- Mw / Mn molecular weight distribution
- Such a polyester resin having a large molecular weight distribution has a problem that the mechanical properties are inferior.
- the ratio of the component (D) to the component (B) ((D) / (B)) is preferably 0.001 to 5 mol%, more preferably 0.001 to 1 mol%, still more preferably 0.01 to 0.1 mol%.
- the upper limit of the ratio of the component (D) to the component (B) is preferably 5 mol% or less, more preferably 1 mol% or less, still more preferably 0.5 mol% or less. More preferably, it is 0.1 mol% or less, More preferably, it is 0.05 mol% or less.
- the lower limit of the ratio of the component (D) to the component (B) is preferably 0.001 mol% or more, more preferably 0.002 mol% or more, still more preferably 0.005 mol% or more, More preferably, it is 0.01 mol% or more.
- the appearance and the like of the obtained polyester resin can be further improved.
- both the mechanical properties and appearance of the polyester resin can be made excellent.
- the appearance for example, improvement of the transparency of the polyester resin and prevention of white turbidity when formed into a molded body can be mentioned.
- a basic compound (D) For example, carbonate, hydroxide, carboxylate, an oxide, a chloride, an alkoxide of alkali metals, such as lithium, sodium, potassium, beryllium, magnesium, calcium
- alkali metals such as lithium, sodium, potassium, beryllium, magnesium, calcium
- alkali metal carbonates, hydroxides, and carboxylates; alkaline earth metal carbonates, hydroxides, and carboxylates are preferred, and alkali metal carboxylates are more preferred.
- alkali metal carboxylates include, for example, alkali metal formate, acetate, propionate, butyrate, isobutyrate, valerate, caproate, caprylate, caprate, laurate , Myristate, palmitate, stearate, benzoate.
- alkali metal formate, acetate, propionate, butyrate, isobutyrate, and benzoate are preferable.
- the production method of the present embodiment at least a diol (A) having a cyclic acetal skeleton, a dicarboxylic acid bisalkyl ester (B), and a diol (C) not having a cyclic acetal skeleton are mixed with the basic compound (D). Since it is only necessary to have a step of reacting in the presence, the production method is highly flexible. For example, even in the case of a polyester resin that could not be manufactured without necessarily passing through a number of processes in the past, according to the manufacturing method of this embodiment, in particular, by effectively using the component (D), one step or It can be efficiently manufactured with fewer steps than conventional.
- the production method of the present embodiment is a simple method in which the monomer (A) component, the component (B), and the component (C) are reacted in the presence of the basic compound (D). It is a manufacturing method with a high degree of freedom also in that the combination with the process is easy. Therefore, the manufacturing method of the present embodiment can combine a plurality of steps as necessary in consideration of physical properties desired for the target polyester resin.
- the dicarboxylic acid bishydroxyalkyl ester which is one of the raw materials widely used in the conventional manufacturing method, has a problem that it is not easily available, but according to the manufacturing method of this embodiment, such acquisition is difficult.
- the raw material is not necessarily used. That is, there is an advantage that the production method can be relaxed and the cost is excellent.
- the production method of the present embodiment includes, for example, a step of reacting (A) component, (B) component, and (C) component in the presence of component (D) to oligomerize (oligomerization step). And a step of further adding a predetermined monomer to the reaction mixture of the oligomerization step and further increasing the molecular weight (high molecular weight step).
- examples of the predetermined monomer added in the high molecular weight process include one or more selected from the group consisting of the component (A), the component (B), and the component (C).
- the predetermined monomer may be a monomer other than the components (A) to (C).
- the oligomerization step may be performed without a catalyst, or a catalyst for oligomerization may be used.
- a catalyst for oligomerization may be used.
- the amount added is preferably 0.0001 to 5 mol% with respect to component (B).
- a conventionally known catalyst can be used and is not particularly limited.
- the catalyst include compounds of metals such as zinc, lead, cerium, cadmium, manganese, cobalt, lithium, sodium, potassium, calcium, nickel, magnesium, vanadium, aluminum, titanium, germanium, antimony, tin (for example, Fatty acid salts, carbonates, phosphates, hydroxides, chlorides, oxides, alkoxides, etc.); and magnesium metal.
- metals such as zinc, lead, cerium, cadmium, manganese, cobalt, lithium, sodium, potassium, calcium, nickel, magnesium, vanadium, aluminum, titanium, germanium, antimony, tin (for example, Fatty acid salts, carbonates, phosphates, hydroxides, chlorides, oxides, alkoxides, etc.); and magnesium metal.
- at least a compound of manganese, aluminum, titanium, germanium, antimony, and tin is preferable, and a manganese compound is more preferable.
- a conventionally known manganese compound can be used as the manganese compound, and is not particularly limited.
- the catalyst of an oligomerization process may be a thing which can be used as above-mentioned (D) component. That is, among those exemplified as the component (D), when one that also functions as a catalyst for the oligomerization step is selected, it can be used not only as the component (D) but also as a catalyst for the oligomerization step.
- the catalyst used at an oligomerization process may be used individually by 1 type, and may use 2 or more types together.
- etherification inhibitors include amine compounds.
- heat stabilizer include phosphoric acid, phosphorous acid, phenylphosphonic acid, phosphoric acid ester, phosphorous acid ester and the like.
- the reaction temperature in the oligomerization step is not particularly limited, but is preferably 80 to 240 ° C, more preferably 100 to 235 ° C, and further preferably 150 to 230 ° C.
- side reactions such as decomposition of the diol (A) having a cyclic acetal skeleton and by-products such as trifunctional monomers and tetrafunctional monomers can be effectively suppressed.
- side reactions such as dehydration etherification of the diol (C) having no cyclic acetal skeleton can also be suppressed.
- the ratio of the diol (A) having a cyclic acetal, the dicarboxylic acid bisalkyl ester (B) and the diol (C) not having a cyclic acetal skeleton in the oligomerization step is not particularly limited, but the dicarboxylic acid bisalkyl ester (B)
- the total ratio of the diol (A) having a cyclic acetal and the diol (C) having no cyclic acetal skeleton (((A) + (C)) / (B)) is 1.2 to 2.0 times It is preferably a mole, more preferably 1.5 to 1.9 moles, and still more preferably 1.6 to 1.8 moles.
- the oligomerization step is performed until the reaction rate of the transesterification reaction of the dicarboxylic acid bisalkyl ester (B) is preferably 50 mol% or more, more preferably 70 mol% or more, and even more preferably 90 mol% or more.
- the reaction rate of the transesterification can be calculated from the mass of monoalcohol distilled out of the system.
- the reaction time in the oligomerization step is preferably carried out until the monoalcohol has been distilled off.
- Examples of the high molecular weight process include a process in which the oligomer obtained in the oligomerization process is polycondensed under reduced pressure to increase the molecular weight.
- the conditions for the polycondensation in the high molecular weight process are not particularly limited, and for example, the same conditions as in the polycondensation process in the conventional method for producing a polyester resin can be employed.
- the pressure in the polycondensation step is not particularly limited, but it is preferable to gradually reduce the pressure as the reaction proceeds.
- the final pressure of the polycondensation reaction is preferably 0.1 to 300 Pa. By setting the final pressure of the polycondensation reaction to 300 Pa or less, the reaction rate of the polycondensation reaction can be sufficiently increased.
- the reaction temperature in the polycondensation step is not particularly limited, but it is preferable to gradually raise the temperature as the reaction proceeds.
- the final reaction temperature of the polycondensation reaction is preferably 190 to 300 ° C. By setting the final reaction temperature of the polycondensation reaction to 300 ° C. or lower, side reactions such as thermal decomposition of the reactant can be effectively suppressed. In addition, by controlling to the above temperature, yellowing (discoloration to yellow or the like) of the obtained polyester resin can be effectively suppressed.
- the high molecular weight process can be stopped in the same manner as a general polyester resin production method.
- the reaction may be stopped after confirming that the polyester resin has reached a desired degree of polymerization by measuring melt viscosity or the like.
- the melt viscosity can grasp the degree of load of the stirrer based on the torque, the load current value of the motor, and the like. Such a method is simple and preferable.
- the reaction time in the high molecular weight process is not particularly limited, but is preferably 6 hours or less, more preferably 4 hours or less.
- side reactions such as decomposition of the diol (A) having a cyclic acetal skeleton and by-products such as trifunctional monomers and tetrafunctional monomers can be efficiently suppressed, and the color tone of the polyester resin can be suppressed. Is even better.
- the high molecular weight process may be performed without a catalyst, or a catalyst for increasing the molecular weight may be used.
- a catalyst for increasing the molecular weight
- the addition amount is preferably 0.0001 to 5 mol% with respect to the dicarboxylic acid structural unit in the oligomer.
- the catalyst for the high molecular weight process a conventionally known catalyst can be used and is not particularly limited.
- metal compounds such as aluminum, titanium, germanium, antimony and tin are preferable.
- titanium alkoxides, oxides, and carboxylates; germanium alkoxides and oxides; antimony alkoxides and oxides are more preferable.
- the catalyst is more preferably an antimony oxide. These may be used alone or in combination of two or more.
- various stabilizers such as an etherification inhibitor and a heat stabilizer, a polymerization regulator, a light stabilizer, an antistatic agent, a lubricant, an antioxidant, a release agent, and the like are also used. Can do. Conventionally known ones can also be used.
- Examples of the etherification inhibitor include amine compounds.
- Examples of the heat stabilizer include phosphoric acid, phosphorous acid, phenylphosphonic acid, phosphoric acid ester, phosphorous acid ester, and the like.
- Examples of the polymerization regulator include aliphatic monoalcohols such as decanol and hexadecanol; aromatic monoalcohols such as benzyl alcohol; aliphatic monocarboxylic acids such as caproic acid, lauric acid and stearic acid; benzoic acid and the like Aromatic monocarboxylic acid and the like.
- Examples of the light stabilizer include hindered amine light stabilizers, benzotriazole UV absorbers, and triazine UV absorbers.
- Examples of the antistatic agent include glycerin fatty acid ester monoglyceride and sorbitan fatty acid ester.
- Examples of the lubricant include aliphatic carboxylic acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, and pentaerythritol fatty acid esters.
- Examples of the antioxidant include phenolic antioxidants and phosphite ester antioxidants.
- Examples of the mold release agent include aliphatic carboxylic acid esters, glycerin fatty acid esters, sorbitan fatty acid esters, pentaerythritol fatty acid esters, and the like.
- the ratio of the diol structural unit having a cyclic acetal skeleton to the total diol structural units constituting the polyester resin is preferably 5 to 60 mol%, more preferably 10 to 60 mol%, and still more preferably 15 to 55 mol%.
- the mol% is more preferably 20 to 50 mol%.
- polyester resin having a diol structural unit having a cyclic acetal skeleton of 5 mol% or more it was difficult to produce a polyester resin having a diol structural unit having a cyclic acetal skeleton of 5 mol% or more, but according to the production method of the present embodiment, a diol structural unit having a cyclic acetal skeleton. Can efficiently produce a polyester resin having 5 mol% or more. Polyester resins having a diol structural unit having a cyclic acetal skeleton of 5 mol% or more are useful because they have various physical properties.
- the diol structural unit having a cyclic acetal skeleton is preferably 5 mol% or more, more preferably 10 mol% or more, still more preferably 15 mol% or more, and still more preferably 20 mol% or more. More than mol%.
- the polyester resin has a diol structural unit having a cyclic acetal skeleton of 60 mol% or less, it can be efficiently produced without being restricted in production in the production method of the present embodiment.
- a polyester resin having a diol structural unit having a cyclic acetal skeleton of 60 mol% or less is also useful because it is excellent in various physical properties.
- the diol structural unit having a cyclic acetal skeleton is preferably 60 mol% or less, more preferably 55 mol% or less, and further preferably 50 mol% or less.
- the physical properties of the polyester resin can be further improved by introducing dimethyl 2,6-naphthalenedicarboxylate as a dicarboxylic acid constituent unit constituting the polyester resin that can be obtained by the production method of the present embodiment.
- a polyester resin excellent in heat resistance can be obtained.
- preferred examples of the polyester resin that can be obtained by the production method of the present embodiment include those having a structural unit derived from dimethyl 2,6-naphthalenedicarboxylate as a dicarboxylic acid structural unit.
- the proportion of the structural unit derived from dimethyl 2,6-naphthalenedicarboxylate in the dicarboxylic acid structural unit is preferably 5 to 100 mol%, more preferably 21 to 100 mol%, still more preferably 45 to 100 mol%. Mol%.
- the number average molecular weight (Mn) of the polyester resin obtainable by the production method of the present embodiment is preferably 12,000 to 18,000, more preferably 13,000 to 17,000, and still more preferably 14 , 000 to 16,000.
- Mn number average molecular weight
- the mechanical physical property of a polyester resin, especially a tensile elongation rate improve further.
- the number average molecular weight not more than the above upper limit value, it is possible to suppress the increase in viscosity of the polyester resin, and the handling at the time of production becomes further excellent.
- the molecular weight distribution (Mw / Mn) of the polyester resin that can be obtained by the production method of the present embodiment is preferably 2.5 to 3.8.
- the upper limit of the molecular weight distribution is more preferably 3.5 or less, and even more preferably 3.3 or less.
- the mechanical physical property of polyester resin, especially the tensile elongation rate improve further.
- the molecular weight distribution can be set to a low value as described above.
- molecular weight distribution is 3.0 or more, there also exists an advantage that it can fully achieve, without controlling reaction conditions so much.
- the molding method of the polyester resin that can be obtained by the production method of the present embodiment is not particularly limited, and a conventionally known molding method can also be used.
- Examples of the molding method include injection molding, extrusion molding, calendar molding, extrusion foam molding, extrusion blow molding, injection blow molding, and the like.
- the values of NDCM and DMT are the ratio to the total carboxylic acid units, and EG , SPG, and DEG, which is a by-product of the reaction, are ratios relative to the total diol units.
- the glass transition temperature was measured according to JIS K7121. Specifically, the polyester resin was put in an aluminum non-sealed container, heated to 280 ° C. in a nitrogen gas atmosphere, and then rapidly cooled. And the glass transition temperature was calculated
- the measurement apparatus and measurement conditions were as follows. Measuring device: “DSC / TA-60WS” manufactured by Shimadzu Corporation Sample: about 10mg Nitrogen flow rate: 50 mL / min Measurement range: 20-280 ° C Temperature increase rate: 20 ° C / min
- Yellowness (YI) Yellowness was measured according to JIS K7373 by placing 5.8 g of polyester pellets in a quartz cell having a diameter of 20 mm and a height of 10 mm.
- the measurement apparatus and measurement conditions were as follows. Measuring device: Color Densitometer “ZE-2000” manufactured by Nippon Denshoku Industries Co., Ltd. Number of measurements: 3 times
- Example 1 A polyester production apparatus equipped with a packed tower type rectification tower, a partial condenser, a full condenser, a cold trap, a stirrer, a heating device, and a nitrogen introduction pipe was prepared.
- Example 2 A polyester resin was obtained in the same manner as in Example 1 except that the amount of raw material described in Table 1 was charged.
- the evaluation results of the polyester resin are shown in Table 2.
- MI melt index; 260 ° C., 2.16 kg
- MI of the polyester resin obtained in Example 3 was 11 g / 10 min.
- Example 1 A polyester resin was obtained in the same manner as in Example 1 except that the amount of raw material described in Table 1 was charged and potassium acetate was not used. The evaluation results of the polyester resin are shown in Table 2.
- NDCM Dimethyl 2,6-naphthalenedicarboxylate
- DMT Dimethyl terephthalate
- SPG 3,9-bis (1,1-dimethyl-2-hydroxyethyl) -2,4,8,10-tetraoxaspiro [5. 5]
- Undecane EG Ethylene glycol
- AcOK Potassium acetate
- Sb 2 O 3 Antimony (III) oxide
- TEP Triethyl phosphate
- Example 4 A polyester resin was obtained in the same manner as in Example 1 except that the amount of raw material described in Table 3 was charged. Table 4 shows the evaluation results of the polyester resin.
- Strands were produced from the produced resin pellets and their mechanical properties were evaluated.
- a strand was produced by the following method using a capillograph manufactured by Toyo Seiki Seisakusho. Resin pellets were put into a cylinder (cylinder diameter: 10 mm, cylinder temperature: 240 ° C.) and retained for 6 minutes to melt. Using the piston, the melted polyester resin was extruded from the orifice hole (orifice hole diameter: 1 mm) at a piston speed of 30 mm / min. This was taken up at a take-up speed of 5 m / min to obtain a strand (diameter 0.9 mm).
- Example 8 A polyester resin was obtained in the same manner as in Example 1 except that the amount of raw material described in Table 5 was charged. The physical properties and appearance of the polyester resin were compared with Example 1. The evaluation results are shown in Table 6.
- Examples 1 and 8 can be said to be manufacturing methods with a high degree of freedom as manufacturing methods. And about the external appearance of the obtained polyester resin, it was confirmed that the external appearance of the polyester resin of Example 1 was favorable and was improved further. Moreover, also about the mechanical physical property of the polyester resin, it was confirmed that the tensile strength of the polyester resin of Example 1 was further improved.
- the manufacturing method of the polyester resin of a present Example does not need to prescribe
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Abstract
Description
〔1〕
ジカルボン酸構成単位とジオール構成単位とからなり、前記ジオール構成単位として環状アセタール骨格を有する構成単位を少なくとも有するポリエステル樹脂の製造方法であって、
環状アセタール骨格を有するジオール(A)と、ジカルボン酸ビスアルキルエステル(B)と、環状アセタール骨格を有しないジオール(C)とを、塩基性化合物(D)の存在下で反応させる工程を有する、ポリエステル樹脂の製造方法。
〔2〕
前記(B)成分に対する前記(D)成分の割合が、0.001~5モル%である、〔1〕に記載のポリエステル樹脂の製造方法。
〔3〕
前記(D)成分が、アルカリ金属の炭酸塩、アルカリ金属の水酸化物、アルカリ金属のカルボン酸塩、アルカリ土類金属の炭酸塩、アルカリ土類金属の水酸化物、及びアルカリ土類金属のカルボン酸塩からなる群より選ばれるいずれか1種以上である、〔1〕又は〔2〕に記載のポリエステル樹脂の製造方法。
〔4〕
前記アルカリ金属のカルボン酸塩が、アルカリ金属のギ酸塩、アルカリ金属の酢酸塩、アルカリ金属のプロピオン酸塩、アルカリ金属の酪酸塩、アルカリ金属のイソ酪酸塩、及びアルカリ金属の安息香酸塩からなる群より選ばれるいずれか1種以上である、〔3〕に記載のポリエステル樹脂の製造方法。
〔5〕
前記(A)成分が、式(i)で表される化合物、式(ii)で表される化合物、又はその両方である、〔1〕~〔4〕のいずれか一項に記載のポリエステル樹脂の製造方法。
〔6〕
前記(A)成分が、3,9-ビス(1,1-ジメチル-2-ヒドロキシエチル)-2,4,8,10-テトラオキサスピロ〔5.5〕ウンデカン、5-メチロール-5-エチル-2-(1,1-ジメチル-2-ヒドロキシエチル)-1,3-ジオキサン、又はその両方である、〔1〕~〔5〕のいずれか一項に記載のポリエステル樹脂の製造方法。
〔7〕
前記(B)成分が、テレフタル酸ジメチル、イソフタル酸ジメチル、及び2,6-ナフタレンジカルボン酸ジメチルからなる群より選ばれるいずれか1種以上である、〔1〕~〔6〕のいずれか一項に記載のポリエステル樹脂の製造方法。
(1)数平均分子量(Mn)、重量平均分子量(Mw)、分子量分布(Mw/Mn)
ポリエステル樹脂2mgをクロロホルム20gに溶解し、ゲルパーミエーションクロマトグラフ(GPC)装置で測定し、標準ポリスチレンで検量して、Mn、Mw及びMw/Mnを求めた。使用したGPC装置、装置カラム、及び測定条件は以下のとおりであった。
GPC装置:東ソー(株)製、「HLC-8320GPC」
装置カラム:TSKgel SuperMultiporeHZ-N,M&H
測定溶媒:クロロホルム
流速:0.6mL/min
1H-NMR測定を行い、各構成単位由来のピーク面積比から、ポリエステル樹脂の成分組成を求めた。測定装置は日本電子(株)製、「JNM-AL400」を用い、400MHzで測定した。溶媒には重クロロホルムを用いた。ポリマーの溶解性が十分でない場合は、重トリフルオロ酢酸を適量加え、ポリマーを十分に溶解させた。なお、表2、表4、及び表6に記載したポリエステル樹脂の構成単位(表中の[mol%]の項目参照)に関しては、NDCM及びDMTの数値は全カルボン酸単位に対する割合であり、EG、SPG、及び反応の副生成物であるDEGの数値は全ジオール単位に対する割合である。
ガラス転移温度は、JIS K7121に準拠して測定した。具体的には、ポリエステル樹脂をアルミニウム製の非密封容器に入れ、窒素ガス雰囲気下で280℃まで昇温させ、その後急冷した。そして、ポリエステル樹脂を再度昇温させたことで得られた温度プロファイルより、ガラス転移温度を求めた。測定装置及び測定条件は以下のとおりであった。
測定装置:島津製作所(株)製、「DSC/TA-60WS」
試料:約10mg
窒素流通量:50mL/min
測定範囲:20~280℃
昇温速度:20℃/min
黄色度は、ポリエステルペレット5.8gを直径20mm、高さ10mmの石英セルに入れ、JIS K7373に準拠して測定した。測定装置及び測定条件は以下のとおりであった。
測定装置:日本電色工業(株)製、測色色差計「ZE-2000」
測定回数:3回
ポリエステル樹脂を、フェノール/1,1,2,2-テトラクロロエタン=6/4(重量比)の混合溶媒に溶解し、25℃に保持して、ウベローデ型粘度計を使用して固有粘度を測定した。
射出成形機(住友重機械工業(株)製、射出成型機「SE130DU」)と金型を用いて、シリンダ温度240~280℃、金型温度40~60℃で、ポリエステル樹脂を射出成形して成形体を得た。これを試験片として、物性を評価した。
(引張強度、引張弾性率、引張伸び率)
JIS K7161に準拠して、引張強度、引張弾性率、及び引張伸び率を算出した。測定装置及び測定条件は以下のとおりであった。
測定装置:東洋精機製作所(株)製、「ストログラフAPIII」
測定試験片:JIS 1号試験片
試験速度:5mm/min
充填塔式精留塔、分縮器、全縮器、コールドトラップ、撹拌機、加熱装置、及び窒素導入管を備えたポリエステル製造装置を用意した。そこに、環状アセタール骨格を有するジオール(A)(3,9-ビス(1,1-ジメチル-2-ヒドロキシエチル)-2,4,8,10-テトラオキサスピロ[5.5]ウンデカン)と、ジカルボン酸成分としてジカルボン酸ビスアルキルエステル(B)(2,6-ナフタレンジカルボン酸ジメチル、テレフタル酸ジメチル)と、環状アセタール骨格を有しないジオール(C)(エチレングリコール)と、塩基性化合物(D)(酢酸カリウム)を、表1に記載の割合で仕込み、ジカルボン酸成分に対し酢酸マンガン四水和物0.03モル%の存在下、窒素雰囲気下で215℃迄昇温して、エステル交換反応を行った。そして、エステル交換反応におけるジカルボン酸成分の反応率を経時的に計測した。エステル交換反応におけるジカルボン酸成分の反応率は、系外に留去されたメタノールの質量より算出した。
ジカルボン酸成分の反応率が90%以上になった後、ジカルボン酸成分に対して酸化アンチモン(III)0.02モル%とリン酸トリエチル0.06モル%を加え、昇温と減圧を徐々に行い、最終的に250~280℃、0.1kPa以下の条件で重縮合を行った。適度な溶融粘度となった時点で反応を終了し、ポリエステル樹脂を回収した。ポリエステル樹脂の評価結果を表2に示す。
表1に記載された量の原料を仕込んだ点以外は、実施例1と同様にしてポリエステル樹脂を得た。ポリエステル樹脂の評価結果を表2に示す。なお、実施例2で得られたポリエステル樹脂のMI(メルトインデックス;260℃、2.16kg)は13g/10minであり、実施例3で得られたポリエステル樹脂のMIは11g/10minであった。
表1に記載された量の原料を仕込み、酢酸カリウムを使用しない点以外は、実施例1と同様にしてポリエステル樹脂を得た。ポリエステル樹脂の評価結果を表2に示す。
NDCM:2,6-ナフタレンジカルボン酸ジメチル
DMT:テレフタル酸ジメチル
SPG:3,9-ビス(1,1-ジメチル-2-ヒドロキシエチル)-2,4,8,10-テトラオキサスピロ[5.5]ウンデカン
EG:エチレングリコール
DEG:ジエチレングリコール
Mn(AcO)2:酢酸マンガン四水和物
AcOK:酢酸カリウム
Sb2O3:酸化アンチモン(III)
TEP:リン酸トリエチル
さらに、ポリエステル樹脂の製造条件を種々変更して、より詳細に検討した(実施例4~7)。
表3に記載された量の原料を仕込んだ点以外は、実施例1と同様にしてポリエステル樹脂を得た。ポリエステル樹脂の評価結果を表4に示す。
さらに、ポリエステル樹脂の製造条件を種々変更して、ポリエステル樹脂の外観等について詳細に検討した。なお、外観は以下の基準に基づき評価した。
製造した樹脂ペレットを目視で確認し、樹脂内部に白濁等のような透明性を阻害するものが観察されないものを「良好」と評価した。白濁が観察されたものを「白濁」と評価した。
製造した樹脂ペレットからストランドを作製し、その機械的物性を評価した。
東洋精機製作所(株)製のキャピログラフを用いて、以下の方法によってストランドを作製した。シリンダ(シリンダ直径10mm、シリンダ温度240℃)内に樹脂ペレットを投入し、6分間滞留させて溶融させた。ピストンを用いて、溶融したポリエステル樹脂をオリフィス孔(オリフィス孔の直径1mm)からピストン速度30mm/分で押し出した。これを、引き取り速度5m/minで引き取ってストランド(直径0.9mm)を得た。JIS K7161に準拠して、ストランドの引張強度、引張弾性率、及び引張伸び率を算出した。測定装置及び測定条件は以下のとおりであった。
測定装置:東洋精機製作所(株)製、全自動引張試験機「ストログラフAPIII」
測定試験片:直径0.9mmのストランド
試験速度:5mm/min
Claims (7)
- ジカルボン酸構成単位とジオール構成単位とからなり、前記ジオール構成単位として環状アセタール骨格を有する構成単位を少なくとも有するポリエステル樹脂の製造方法であって、
環状アセタール骨格を有するジオール(A)と、ジカルボン酸ビスアルキルエステル(B)と、環状アセタール骨格を有しないジオール(C)とを、塩基性化合物(D)の存在下で反応させる工程を有する、ポリエステル樹脂の製造方法。 - 前記(B)成分に対する前記(D)成分の割合が、0.001~5モル%である、請求項1に記載のポリエステル樹脂の製造方法。
- 前記(D)成分が、アルカリ金属の炭酸塩、アルカリ金属の水酸化物、アルカリ金属のカルボン酸塩、アルカリ土類金属の炭酸塩、アルカリ土類金属の水酸化物、及びアルカリ土類金属のカルボン酸塩からなる群より選ばれるいずれか1種以上である、請求項1又は2に記載のポリエステル樹脂の製造方法。
- 前記アルカリ金属のカルボン酸塩が、アルカリ金属のギ酸塩、アルカリ金属の酢酸塩、アルカリ金属のプロピオン酸塩、アルカリ金属の酪酸塩、アルカリ金属のイソ酪酸塩、及びアルカリ金属の安息香酸塩からなる群より選ばれるいずれか1種以上である、請求項3に記載のポリエステル樹脂の製造方法。
- 前記(A)成分が、式(i)で表される化合物、式(ii)で表される化合物、又はその両方である、請求項1~4のいずれか一項に記載のポリエステル樹脂の製造方法。
- 前記(A)成分が、3,9-ビス(1,1-ジメチル-2-ヒドロキシエチル)-2,4,8,10-テトラオキサスピロ〔5.5〕ウンデカン、5-メチロール-5-エチル-2-(1,1-ジメチル-2-ヒドロキシエチル)-1,3-ジオキサン、又はその両方である、請求項1~5のいずれか一項に記載のポリエステル樹脂の製造方法。
- 前記(B)成分が、テレフタル酸ジメチル、イソフタル酸ジメチル、及び2,6-ナフタレンジカルボン酸ジメチルからなる群より選ばれるいずれか1種以上である、請求項1~6のいずれか一項に記載のポリエステル樹脂の製造方法。
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Cited By (13)
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JP2014046598A (ja) * | 2012-08-31 | 2014-03-17 | Mitsubishi Gas Chemical Co Inc | 熱可塑性樹脂積層体 |
WO2016009914A1 (ja) * | 2014-07-18 | 2016-01-21 | 三菱瓦斯化学株式会社 | ポリエステル樹脂の製造方法 |
JP5927751B1 (ja) * | 2014-07-18 | 2016-06-01 | 三菱瓦斯化学株式会社 | ポリエステル樹脂の製造方法 |
US10844215B2 (en) | 2016-05-10 | 2020-11-24 | Mitsubishi Gas Chemical Company, Inc. | Polyester resin composition |
WO2017195791A1 (ja) * | 2016-05-10 | 2017-11-16 | 三菱瓦斯化学株式会社 | ポリエステル樹脂組成物 |
CN109071928A (zh) * | 2016-05-10 | 2018-12-21 | 三菱瓦斯化学株式会社 | 聚酯树脂组合物 |
JPWO2017195791A1 (ja) * | 2016-05-10 | 2019-03-07 | 三菱瓦斯化学株式会社 | ポリエステル樹脂組成物 |
WO2019208500A1 (ja) | 2018-04-24 | 2019-10-31 | 三菱瓦斯化学株式会社 | 多層体および多層容器 |
WO2019208502A1 (ja) | 2018-04-24 | 2019-10-31 | 三菱瓦斯化学株式会社 | 多層体および多層容器 |
WO2019208501A1 (ja) | 2018-04-24 | 2019-10-31 | 三菱瓦斯化学株式会社 | 多層体および多層容器 |
WO2020039967A1 (ja) | 2018-08-24 | 2020-02-27 | 三菱瓦斯化学株式会社 | 多層容器及びその製造方法 |
WO2020137808A1 (ja) | 2018-12-28 | 2020-07-02 | 三菱瓦斯化学株式会社 | 多層容器及びその製造方法 |
WO2021070629A1 (ja) | 2019-10-08 | 2021-04-15 | 三菱瓦斯化学株式会社 | 多層容器の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI605072B (zh) | 2017-11-11 |
CN104321363A (zh) | 2015-01-28 |
EP2848639A1 (en) | 2015-03-18 |
JPWO2013168804A1 (ja) | 2016-01-07 |
EP2848639A4 (en) | 2015-12-09 |
TW201402642A (zh) | 2014-01-16 |
KR102076381B1 (ko) | 2020-02-11 |
JP6075700B2 (ja) | 2017-02-08 |
EP2848639B1 (en) | 2022-03-02 |
US20150133626A1 (en) | 2015-05-14 |
KR20150018508A (ko) | 2015-02-23 |
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