WO2009110472A1 - ポリエステル系樹脂、その製造方法およびその用途 - Google Patents
ポリエステル系樹脂、その製造方法およびその用途 Download PDFInfo
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- WO2009110472A1 WO2009110472A1 PCT/JP2009/053973 JP2009053973W WO2009110472A1 WO 2009110472 A1 WO2009110472 A1 WO 2009110472A1 JP 2009053973 W JP2009053973 W JP 2009053973W WO 2009110472 A1 WO2009110472 A1 WO 2009110472A1
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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
- C08G63/91—Polymers modified by chemical after-treatment
- C08G63/912—Polymers modified by chemical after-treatment derived from hydroxycarboxylic acids
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/0895—Manufacture of polymers by continuous processes
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4263—Polycondensates having carboxylic or carbonic ester groups in the main chain containing carboxylic acid groups
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/428—Lactides
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/73—Polyisocyanates or polyisothiocyanates acyclic
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/757—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the cycloaliphatic ring by means of an aliphatic group
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/758—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing two or more cycloaliphatic rings
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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
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
- C08G18/7614—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring
- C08G18/7628—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group
- C08G18/7642—Polyisocyanates or polyisothiocyanates cyclic aromatic containing only one aromatic ring containing at least one isocyanate or isothiocyanate group linked to the aromatic ring by means of an aliphatic group containing at least two isocyanate or isothiocyanate groups linked to the aromatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate groups, e.g. xylylene diisocyanate or homologues substituted on the aromatic ring
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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
- C08G63/68—Polyesters containing atoms other than carbon, hydrogen and oxygen
- C08G63/685—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen
- C08G63/6852—Polyesters containing atoms other than carbon, hydrogen and oxygen containing nitrogen derived from hydroxy carboxylic acids
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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
- C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
- C08G69/44—Polyester-amides
Definitions
- the present invention relates to a polyester-based resin, a production method thereof, and an application thereof.
- Aliphatic polyesters particularly aliphatic polyesters obtained from hydroxycarboxylic acids such as polylactic acid, polyglycolic acid or copolymers thereof, are attracting attention as biodegradable polymer compounds.
- Biodegradable polymer compounds are used as various materials such as medical materials such as sutures, sustained-release materials such as pharmaceuticals, agricultural chemicals, and fertilizers.
- the polymer compound In order to be used as the material, the polymer compound is generally required to have high mechanical properties. Therefore, the polymer compound needs to have a high molecular weight.
- a method of producing lactide and glycolide from lactic acid and glycolic acid and then ring-opening polymerization thereof to produce high molecular weight polylactide and polyglycolide is used.
- a high molecular weight polymer can be obtained, but since it is a two-stage reaction, a great deal of labor is required and it cannot be said that it is economical.
- the method of directly polycondensing lactic acid and glycolic acid is economical, but has the disadvantage that a high molecular weight polymer cannot be obtained.
- Non-Patent Document 1 a method of increasing the molecular weight of low molecular weight polylactic acid to a molecular weight more than twice has been proposed (for example, see Non-Patent Document 1).
- This method is a method in which telechelic polylactic acid of both terminal diols is reacted with diisocyanate, and a newly formed bond is only a urethane bond having low thermal stability.
- An object of the present invention is to provide a polyester resin having a high molecular weight and high crystallinity amide bond in a molecular chain, a method for producing the same, and a use thereof. Furthermore, it aims at providing the polyester-type resin which has biodegradability and has an amide bond in a molecular chain, its manufacturing method, and its use.
- the present inventors have obtained a polyester-based resin (C) having an amide bond in the molecular chain obtained through a specific reaction step, which has a high molecular weight and high crystallinity.
- the present invention has been reached.
- the present inventors have found that a biodegradable polyester resin (C) having a high molecular weight and excellent thermal stability can be produced at a low cost by passing through a specific reaction step.
- the polyester resin (C) of the present invention is obtained by reacting an aliphatic polyester resin (A) and a polyisocyanate compound (B) in the presence of an amidation catalyst, and is represented by the following formula (1).
- the structural unit is included.
- R represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group containing an alicyclic structure, or a hydrocarbon group containing an aromatic ring.
- the aliphatic polyester resin (A) is preferably obtained from hydroxycarboxylic acid, and more preferably polylactic acid.
- the polylactic acid is obtained from lactic acid, and the content of L-form or D-form in the lactic acid is preferably 90% or more.
- the polyester resin (C) preferably has a crystallinity of 10 to 70% and a weight average molecular weight of 100,000 to 1,000,000.
- the polyisocyanate compound (B) is preferably an aliphatic diisocyanate compound.
- Hexamethylene diisocyanate, isophorone diisocyanate, 1,3- (bisisocyanatomethyl) cyclohexane, bis (isocyanatomethyl) bicyclo- [2,2 , 1] -heptane and bis (4-isocyanatocyclohexyl) methane are more preferably one compound selected from the group consisting of.
- the polyester resin (C) of the present invention is a polyester resin having as a main component a constituent unit represented by at least one formula selected from the group consisting of the following formulas (2) to (4). Also good.
- the “main component” as used herein means that 60% by weight or more, more preferably 90% by weight of a structural unit represented by at least one selected from the group consisting of the following formulas (2) to (4) in all resins. It means to contain more than%.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms, and n represents an integer of 20 to 1500.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms
- R 2 represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms.
- n represents an integer of 20 to 1500.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms
- R 2 represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms.
- the aliphatic polyester resin (A) has a weight average molecular weight of 5,000 to 100,000
- the resulting polyester resin (C) has a weight average molecular weight of 100,000 to 1,000,000
- the weight average molecular weight of the aliphatic polyester resin (A) is preferably 3 to 200 times.
- the method for producing the polyester resin (C) includes a step of reacting the aliphatic polyester resin (A) and the polyisocyanate compound (B) in the presence of an amidation catalyst.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- the aliphatic polyester resin (A) is an aliphatic polyester resin in which a terminal hydroxyl group is converted to a carboxyl group.
- the amount of the polyisocyanate compound (B) added is preferably 0.8 to 2.0 times the mol of the aliphatic polyester resin (A).
- the aliphatic polyester resin (A) preferably has a weight average molecular weight of 5,000 to 100,000.
- the Sn content of the aliphatic polyester resin (A) is preferably 300 ppm or less.
- the amidation catalyst preferably contains at least one metal selected from the group of metals in Groups 1, 2 and 3 of the periodic table, and more preferably contains magnesium or calcium.
- the production method of the polyester resin (C) is preferably performed by a twin-screw extruder.
- the film of the present invention is characterized by containing a polyester resin (C).
- the molded product of the present invention is characterized by containing a polyester resin (C).
- the polyester resin (C) of the present invention has an amide bond in the molecular chain, has a practically sufficient high molecular weight, and has a high degree of crystallinity, so it is suitable for fields requiring biodegradability such as films. Used for.
- FIG. 1 is a 13 C-NMR spectrum of the resin obtained in Example 1.
- the polyester resin (C) of the present invention is obtained by reacting an aliphatic polyester resin (A) and a polyisocyanate compound (B) in the presence of an amidation catalyst, and is represented by the following formula (1). It includes a structural unit.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- R represents an aliphatic hydrocarbon group having 1 to 20 carbon atoms, a hydrocarbon group containing an alicyclic structure, or a hydrocarbon group containing an aromatic ring.
- Specific examples of the aliphatic hydrocarbon group having 1 to 20 carbon atoms include methylene, ethylene, propylene, methylethylene, butylene, 1-methylpropylene, 2-methylpropylene, 1,2-dimethylpropylene, 1,3- Dimethylpropylene, 1-methylbutylene, 2-methylbutylene, 3-methylbutylene, 4-methylbutylene, 2,4-dimethylbutylene, 1,3-dimethylbutylene, pentylene, hexylene, heptylene, octylene, decylene, dodecylene, Examples include ethane-1,1-diyl, propane-2,2-diyl, tridecylene, tetradecylene, pentadecylene, hexadecylene,
- hydrocarbon group containing the alicyclic structure examples include cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,4-cyclohexylene, 1,5-cyclooctylene, Norbonylene, 1,3-cyclopentylene, 1,2-cyclohexylene, 1,4-cyclohexylene, 1,4-dimethylcyclohexylene, 1,3-dimethylcyclohexylene, 1-methyl-2,4-cyclohexylene 4,4'-methylene-biscyclohexylene, and 3-methylene-3,5,5-trimethyl-cyclohexylene.
- hydrocarbon group containing an aromatic ring examples include m-phenylene, p-phenylene, 4,4′-diphenylene, 1,4-naphthalene and 1,5-naphthalene, 4,4′-methylenedi.
- examples include phenylene, 2,4-tolylene, 2,6-tolylene, m-xylylene, p-xylylene, m-tetramethylxylylene, 4,4'-oxydiphenylene and chlorodiphenylene.
- 1 to 200 units preferably 1 to 100 units, more preferably 1 to 50 units of the structural unit represented by the formula (1) are contained per molecule of the polyester resin (C).
- the crystallinity of the polyester resin (C) is preferably 10 to 70%, more preferably 10 to 60%, and further preferably 10 to 50%.
- the degree of crystallinity is a value measured by the method described in Examples described later.
- the polyester resin (C) preferably has a weight average molecular weight of 100,000 to 1,000,000, more preferably 100,000 to 700,000, and 100,000 to 500,000. More preferably. It is preferable in terms of moldability and mechanical strength that the weight average molecular weight of the polyester resin (C) is within the above range.
- the method for producing the polyester resin (C) includes a step of reacting the aliphatic polyester resin (A) and the polyisocyanate compound (B) in the presence of an amidation catalyst.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- the aliphatic polyester resin (A) is not particularly limited as long as it does not impair the object of the present invention.
- an existing aliphatic polyester resin may be used, but an aliphatic polyester resin obtained from hydroxycarboxylic acid is preferable.
- Examples of the method for obtaining the aliphatic polyester resin (A) from the hydroxycarboxylic acid include the following two methods. That is, there are a direct method of directly dehydrating and condensing hydroxycarboxylic acid and a method of once synthesizing a cyclic dimer from hydroxycarboxylic acid and ring-opening polymerization of the dimer.
- the polycondensation reaction may be performed in the presence of a catalyst.
- the catalyst examples include metals of Groups 2, 12, 13, 14, or 15 of the periodic table, or oxides or salts thereof.
- metals such as zinc powder, tin powder, aluminum or magnesium, metal oxides such as antimony oxide, zinc oxide, tin oxide, aluminum oxide, magnesium oxide or titanium oxide, stannous chloride, stannic chloride , Stannous bromide, stannic bromide, antimony fluoride, zinc chloride, magnesium chloride or aluminum chloride, etc., carbonates such as magnesium carbonate or zinc carbonate, tin acetate, tin octoate, tin lactate , Organic carboxylates such as zinc acetate or aluminum acetate, or organic sulfonates such as tin trifluoromethanesulfonate, zinc trifluoromethanesulfonate, magnesium trifluoromethanesulfonate, tin methanesulfonate or tin p-toluenesulfonate Can be given
- organometallic oxides of the above metals such as dibutyltin oxide, metal alkoxides of the above metals such as titanium isopropoxide, alkyl metals of the above metals such as diethyl zinc, ion exchange resins such as dowex or amberlite, or the like
- a protonic acid such as sulfuric acid, methanesulfonic acid, or p-toluenesulfonic acid, and a tin or zinc metal or a metal compound thereof, which can obtain a high molecular weight polymer at a high polymerization rate, is preferable.
- metal tin or a tin compound is particularly preferable.
- the aliphatic polyester resin (A) thus obtained may be used in the above step as it is, or the terminal hydroxyl group of the resin (A) may be converted into a carboxyl group and then used in the above step. Good.
- Examples of the method for converting the terminal hydroxyl group of the resin (A) into a carboxyl group include a method of adding an acid anhydride.
- Examples of the acid anhydride include succinic anhydride, phthalic anhydride, maleic anhydride, tetrabromophthalic anhydride, tetrahydrophthalic anhydride, trimellitic anhydride or dodecyl succinic anhydride, and succinic anhydride is particularly preferable.
- the addition amount of the acid anhydride is 0.1 to 10 parts by weight, preferably 0.5 to 8 parts by weight, based on 100 parts by weight of the aliphatic polyester resin (A) before conversion. The amount is preferably 0.5 to 5 parts by weight.
- a resin obtained by further hydrolyzing the aliphatic polyester resin (A) obtained by any of the above methods may be used in the above step.
- the hydroxycarboxylic acid is not particularly limited as long as it does not impair the object of the present invention.
- lactic acid, glycolic acid, or an aqueous solution thereof is particularly preferable because the increase in polymerization rate during use is particularly remarkable, and lactic acid is particularly preferable.
- the hydroxycarboxylic acid is lactic acid.
- polylactic acid is obtained as the aliphatic polyester resin (A).
- Lactic acid has an L-form and a D-form, and a larger L-form content or D-form content is preferable.
- the L-form content or the D-form content is preferably 90% or more, more preferably 95% or more, and particularly preferably 98% or more.
- the resulting resin tends to exhibit high crystallinity.
- aliphatic polyester resin (A) examples include polylactic acid, polyglycolic acid, poly (3-hydroxybutyric acid), poly (4-hydroxybutyric acid), and poly (2-hydroxy-butyric acid), depending on the raw hydroxycarboxylic acid.
- n-butyric acid poly (2-hydroxy-3,3-dimethylbutyric acid), poly (2-hydroxy-3-methylbutyric acid), poly (2-methyllactic acid), poly (2-hydroxycaproic acid), poly ( 2-hydroxy-3-methylbutyric acid), poly (2-cyclohexyl-2-hydroxyacetic acid), poly (mandelic acid) or polycaprolactone, or a copolymer or mixture thereof.
- the weight average molecular weight of the aliphatic polyester resin (A) is preferably 5,000 to 100,000, more preferably 10,000 to 80,000, and 10,000 to 50,000. It is particularly preferred that When the weight average molecular weight of the aliphatic polyester resin (A) is within the above range, it is preferable in that the polymerization time of the aliphatic polyester resin is shortened and the process time can be shortened.
- the content of the heavy metal derived from the catalyst in the aliphatic polyester resin (A) is preferably 300 ppm or less, more preferably 100 ppm or less, and most preferably 30 ppm or less.
- the lower limit of the content is not particularly limited.
- a high molecular weight polyester resin (C) tends to be obtained.
- the Sn content of the aliphatic polyester resin (A) is preferably 300 ppm or less, more preferably 100 ppm or less, and particularly preferably 30 ppm or less.
- a high molecular weight polyester resin (C) can be obtained.
- the lower limit of the Sn content is not particularly limited.
- a high molecular weight polyester resin (C) tends to be obtained.
- a known method can be used, for example, a method of treating with hydrochloric acid / 2-propanol.
- the measuring method of content of heavy metals, such as Sn is as follows.
- the production method according to the present invention includes a step of reacting the aliphatic polyester resin (A) and the polyisocyanate compound (B) in the presence of an amidation catalyst.
- the aliphatic polyester resin (A) and a solvent are mixed, and the mixture is heated to a predetermined temperature under normal pressure and nitrogen atmosphere.
- a polyisocyanate compound (B) is further added and reacted at a predetermined temperature.
- the polyester resin (C) can be obtained by decarboxylating the obtained reaction product.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- the reaction temperature in this step is preferably 40 to 180 ° C, more preferably 60 to 160 ° C, and particularly preferably 80 to 150 ° C. It is preferable that the reaction temperature in the step is in the above-mentioned range because the reaction rate is high and gelation hardly occurs. Moreover, when the reaction temperature in the said process exceeds the said upper limit, a crosslinking reaction may advance and gelatinization may occur easily, and when it is less than the said lower limit, reaction rate may become slow and time may be required for molecular weight increase.
- Solvents used in this step include aromatic hydrocarbons such as toluene, xylene, ethylbenzene, mesitylene and cumene; aliphatic hydrocarbons such as propane, hexane, heptane and cyclohexane; methylene chloride, chloroform, 1, 2 -Halogenated hydrocarbons such as dichloroethane and 1,2-dichlorobenzene.
- aromatic hydrocarbons such as toluene, xylene, ethylbenzene, mesitylene and cumene
- aliphatic hydrocarbons such as propane, hexane, heptane and cyclohexane
- methylene chloride, chloroform, 1, 2 -Halogenated hydrocarbons such as dichloroethane and 1,2-dichlorobenzene.
- the polyisocyanate compound used in the step is a compound having two or more isocyanate groups, and is not particularly limited as long as the object of the present invention is not impaired.
- Examples of the polyisocyanate compound having 3 or more isocyanate groups include triisocyanates such as 1,6,11-undecane triisocyanate and polyisocyanate substituted compounds such as polyphenylmethane polyisocyanate.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- Diisocyanate compounds include 2,4-tolylene diisocyanate, a mixture of 2,4-tolylene diisocyanate and 2,6-tolylene diisocyanate, diphenylmethane diisocyanate, 1,5-naphthylene diisocyanate, xylylene diisocyanate, hexamethylene Diisocyanate, isophorone diisocyanate, 1,3- (bisisocyanatomethyl) cyclohexane, 1,4-bis (isocyanatomethyl) cyclohexane, bis (isocyanatomethyl) bicyclo- [2,2,1] -heptane or bis (4 -Isocyanatocyclohexyl) methane, and more preferred examples include 1,3-xylylene diisocyanate, hexamethylene diisocyanate, isophorone diisocyanate, 1,3- (bisisocyanatomethyl) silane.
- Rohekisan 1,4-bis (isocyanatomethyl) cyclohexane, bis (isocyanatomethyl) bicyclo - [2,2,1] - heptane, or bis (4-isocyanatocyclohexyl) methane, and the like.
- hexamethylene diisocyanate isophorone diisocyanate, 1,3- (bisisocyanatomethyl) cyclohexane, bis (isocyanatomethyl) bicyclo- [2,2,1] -heptane and bis (4-isocyanatocyclohexyl) methane
- it is 1 type of compound chosen from the group which consists of, It is preferable that it is an aliphatic diisocyanate compound, and it is especially preferable that it is a hexamethylene diisocyanate.
- the polyisocyanate compound (B) is the compound.
- the amount of the polyisocyanate compound (B) added is determined based on the number average molecular weight (hereinafter also referred to as “Mn”) obtained from the carboxylic acid value of the aliphatic polyester resin (A).
- Mn number average molecular weight obtained from the carboxylic acid value of the aliphatic polyester resin (A).
- the method for obtaining the number average molecular weight of the aliphatic polyester resin (A) from the carboxylic acid value is calculated on the assumption that one or two carboxyl groups exist at the end of one molecule of the aliphatic polyester resin (A). In addition, a carboxylic acid value is measured by the method described in the Example mentioned later.
- the addition amount of the polyisocyanate compound (B) is preferably 0.8 to 2.0 times mol, and 0.8 to 1.5 times mol for the aliphatic polyester resin (A). Is more preferable, and 0.8 to 1.3 times mole is particularly preferable.
- “fold mole” is a unit of a value calculated by “number of moles of target substance / 1 mole of reference substance”.
- the addition amount of the polyisocyanate compound (B) is less than the lower limit, the addition effect of the polyisocyanate compound (B) is small and it is difficult to obtain a high molecular weight polyester resin (C).
- the upper limit is exceeded, side reactions such as a crosslinking reaction may occur in the isocyanate, and a gel-like polyester resin (C) may be generated.
- amidation catalyst refers to a catalyst that preferentially reacts the terminal carboxyl group portion of the aliphatic polyester resin (A) with the polyisocyanate compound (B) to form an amide bond.
- the amidation catalyst used in the step preferably contains at least one metal selected from the group of metals in Groups 1, 2 and 3 of the periodic table, and is selected from the group of potassium, magnesium, calcium and ytterbium. More preferably, it contains at least one metal, and particularly preferably contains magnesium or calcium. The inclusion of such a metal is preferable in terms of catalytic effect and color tone.
- amidation catalyst containing Group 1 metal of the periodic table examples include organic metal compounds such as organic acid salts, metal alkoxides or metal complexes (acetylacetonate, etc.) of lithium, sodium, potassium, rubidium or cesium; Inorganic metal compounds such as compounds, metal hydroxides, carbonates, phosphates, sulfates, nitrates, chlorides or fluorides, and as amidation catalysts containing Group 2 metals of the above periodic table, Organometallic compounds such as organic acid salts, metal alkoxides or metal complexes (such as acetylacetonate) of beryllium, magnesium, calcium, strontium or barium; metal oxides, metal hydroxides, carbonates, phosphates, sulfates Inorganic metal compounds such as nitrates, chlorides and fluorides.
- organic metal compounds such as organic acid salts, metal alkoxides or metal complexes (acetylacetonate, etc.) of lithium, sodium,
- amidation catalyst containing the Group 3 metal of the periodic table organometallic compounds such as scandium, ytterbium, yttrium or other rare earth organic acid salts, metal alkoxides or metal complexes (acetylacetonate, etc.)
- organometallic compounds such as scandium, ytterbium, yttrium or other rare earth organic acid salts, metal alkoxides or metal complexes (acetylacetonate, etc.
- Inorganic metal compounds such as metal oxides, metal hydroxides, carbonates, phosphates, sulfates, nitrates, chlorides or fluorides; These may be used alone or in combination.
- metal compound catalysts bis (acetylacetonato) magnesium, magnesium stearate, calcium stearate, magnesium chloride, ytterbium triflate and the like are preferable, and magnesium compounds, particularly bis (acetylacetonato) magnesium, magnesium stearate. Is preferred. Two or more of these catalysts can be used in combination.
- the amount of the amidation catalyst added is 0.01 to 2 parts by weight, preferably 0.01 to 1 part by weight, more preferably 0.01 to 0 parts by weight with respect to 100 parts by weight of the aliphatic polyester resin (A). .5 parts by mass.
- the polyisocyanate compound (B) is preferably a diisocyanate compound.
- Catalysts for forming such urethane bonds include dibutyltin dilaurate, dibutyltin dichloride, dibutyltin oxide, dibutyltin dibromide, dibutyltin dimaleate, dibutyltin diacetate, dibutyltin sulfide, tributyltin sulfide, tributyltin oxide, Tributyltin acetate, triethyltin ethoxide, tributyltin ethoxide, dioctyltin oxide, tributyltin chloride, tributyltin trichloroacetate, tin 2-ethylhexanoate, dibutyltitanium dichloride, tetrabutyltitanate, butoxytitanium trichloride, olein Lead such as lead acid, lead 2-ethylhexanoate,
- the addition amount of the catalyst for forming the urethane bond is 0.01 to 2 parts by mass, preferably 0.01 to 1 part by mass, more preferably 0.001 parts by mass with respect to 100 parts by mass of the aliphatic polyester resin (A). 01 to 0.5 parts by mass.
- the viscosity rapidly increases as the molecular weight of the reaction product increases. Therefore, in addition to the method of reacting while stirring with a solution as described above, the method of extruding the product by kneading and reacting without a solvent using an extruder, particularly a twin-screw kneading extruder, is produced without using a solvent. Post-treatment of the product is simple and effective.
- the polyester resin (C) of the present invention is a polyester resin having as a main component a constituent unit represented by at least one formula selected from the group consisting of the following formulas (2) to (4). Also good. Such a polyester resin has biodegradability.
- the “main component” means that 60% by weight or more, more preferably 90% by weight of the structural unit represented by at least one selected from the group consisting of the following formulas (2) to (4) in all resins. It means to contain more than%.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms, and n is 20 to 1500, preferably 25 to 1500, more preferably 30 to An integer of 1500 is represented.
- the substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms is a residue of the aliphatic polyester resin (A), and examples thereof include ethylidene and propylidene.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms
- R 2 represents a substituted or unsubstituted aliphatic group having 1 to 20 carbon atoms.
- n represents an integer of 20 to 1500, preferably 25 to 1500, more preferably 30 to 1500.
- the substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms is a residue of the above acid anhydride, and includes ethylene and the like.
- the unsaturated hydrocarbon group having 2 to 20 carbon atoms is a residue of the above acid anhydride, and examples thereof include vinylene.
- the aromatic hydrocarbon group is a residue of the above-mentioned acid anhydride, and examples thereof include 1,2-phenylene.
- each R 1 independently represents a substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms
- R 2 represents a substituted or unsubstituted aliphatic group having 1 to 20 carbon atoms.
- n and m are each independently an integer of 20 to 1500, preferably 25 to 1500, more preferably 30 to 1500.
- the substituted or unsubstituted aliphatic hydrocarbon group having 1 to 20 carbon atoms is a residue of the above acid anhydride, and includes ethylene and the like.
- the unsaturated hydrocarbon group having 2 to 20 carbon atoms is a residue of the above acid anhydride, and examples thereof include vinylene.
- the aromatic hydrocarbon group is a residue of the above-mentioned acid anhydride, and examples thereof include 1,2-phenylene.
- the polyester resin (C) having as a main component a constituent unit represented by at least one formula selected from the group consisting of the above formulas (2) to (4) is, for example, an aliphatic polyester resin (A) and / or
- the aliphatic polyester resin (A) in which the terminal hydroxyl group is converted to a carboxylic acid and the polyisocyanate compound (B) are reacted in the presence of an amidation catalyst, and can be produced by the method described above.
- Use of the amidation catalyst described above is preferable because the amidation reaction can be performed under mild conditions and side reactions can be suppressed, so that the target polyester resin (C) can be produced with high purity. It is an aspect.
- the aliphatic polyester resin (A) and the aliphatic polyester resin (A) obtained by converting the terminal hydroxyl group into a carboxylic acid preferably have a weight average molecular weight of 5,000 to 100,000. More preferably, it is 000. Such a weight average molecular weight is preferable in terms of biodegradability, thermophysical properties, and process time.
- the weight average molecular weight of the polyester resin (C) having as a main component at least one structural unit represented by the formula selected from the group consisting of the above formulas (2) to (4) is 100,000 to 1 It is preferably 1,000,000,000, more preferably 100,000 to 700,000, and even more preferably 100,000 to 500,000. It is preferable in terms of moldability and mechanical strength that the weight average molecular weight of the polyester resin (C) is within the above range. Further, the weight average molecular weight of the polyester resin (C) is within the above range, and is preferably 3 to 200 times the weight average molecular weight of the aliphatic polyester resin (A), preferably 4 times or more. It is more preferably 100 times or less, and particularly preferably 5 times or more and 50 times or less. Within such a range, the polyester resin (C) can be made higher in molecular weight, which is preferable in terms of the physical properties of the resin such as mechanical properties.
- the Sn content of the aliphatic polyester resin (A) and the aliphatic polyester resin (A) obtained by converting the terminal hydroxyl group into a carboxylic acid is preferably 300 ppm or less, more preferably 100 ppm or less, and 30 ppm or less. It is particularly preferred. In particular, by controlling the Sn content within the above range, a high molecular weight polyester resin (C) can be obtained. Moreover, the lower limit of the Sn content is not particularly limited. When the Sn content of the aliphatic polyester resin (A) and the aliphatic polyester resin (A) obtained by converting the terminal hydroxyl group into a carboxylic acid is within the above range, a high molecular weight polyester resin (C) tends to be obtained.
- the degree of crystallinity of the polyester resin (C) having as a main component a structural unit represented by at least one formula selected from the group consisting of the above formulas (2) to (4) is 10 to 70%. Is preferably 10 to 60%, more preferably 10 to 50%.
- the polyester resin (C) having as a main component a structural unit represented by at least one type selected from the group consisting of the above formulas (2) to (4) has the following formula (a) and an amide bond biodegraded: Therefore, it is a biodegradable resin.
- the polyester resin (C) of the present invention can be produced by various methods.
- a polyester resin (C) is produced by extrusion reaction of the aliphatic polyester resin (A) and the polyisocyanate compound (B) in the presence of the amidation catalyst using a twin-screw extruder.
- a method is mentioned.
- an example of the method of performing reaction with a twin screw extruder will be described in detail.
- a mixture of the aliphatic polyester resin (A) and the amidation catalyst is charged into a twin screw extruder. Furthermore, the polyisocyanate compound (B) is charged from the middle of the twin-screw extruder, and the aliphatic polyester resin (A) and the polyisocyanate compound (B) are subjected to an extrusion reaction to obtain a polyester resin (C ) Can be suitably produced.
- the barrel temperature is preferably 160 to 200 ° C, more preferably 160 to 190 ° C, and further preferably 160 to 180 ° C.
- the residence time from raw material feed to discharge is preferably 1 to 30 minutes, and more preferably 1 to 10 minutes.
- the polyester-based resin (C) of the present invention can be molded by various molding methods. For example, after the extrusion reaction, the strand that has come out is air-cooled with a belt conveyor, and subsequently cut with a pelletizer. Pellets made of the polyester resin (C) can be obtained.
- the film of the present invention contains the polyester resin (C).
- C polyester resin
- molding method examples thereof include a method of forming a film by a T-die molding method, an inflation molding method, a calendar molding method, and a hot press molding method. These films may be stretched in at least one direction.
- the stretching method is not particularly limited, and examples thereof include a roll stretching method, a tenter method, and an inflation method.
- the molded product of the present invention contains the polyester resin (C).
- Specific examples of the molded body include trays, cups, transparent packs, housings for home appliances, and automobile members.
- the polyester-based resin (C) of the present invention can be molded by various molding methods as described above, and can be suitably used for various applications without being particularly limited.
- it can be used for automobile parts, home appliance material parts, electrical / electronic parts, building members, civil engineering members, agricultural materials, daily necessities, various films, breathable films or sheets.
- it is used as a foam suitable for general industrial use and recreation use.
- it can be used for various uses such as yarns, textiles, medical or hygiene products.
- it can be suitably used for automobile material parts, home appliance material parts, or electric / electronic material parts that require heat resistance and impact resistance.
- plastic parts such as front doors and foil caps
- household appliance material parts applications it is a housing for products such as personal computers, headphone stereos, and mobile phones.
- parts and electrical / electronic parts examples include the development of reflective material films and sheets and polarizing films and sheets.
- the polyester resin (C) having as a main component a structural unit represented by at least one formula selected from the group consisting of the above formulas (2) to (4) has biodegradability and mechanical properties. Therefore, it is suitable for various fields where biodegradability is required.
- ⁇ Crystallinity> It calculated
- the crystal melting enthalpy ( ⁇ Hm) at the second temperature increase was measured, and [[( ⁇ Hm) / ( ⁇ H 0 )] ⁇ 100] was determined and used as the crystallinity.
- ⁇ H 0 represents a perfect ideal crystal melting enthalpy, and a numerical value of 93 J / g of polylactic acid was used.
- ⁇ Melting point> It calculated
- TG-DTA DSC device TG-DTA-320 manufactured by SII. Weigh 5 to 6 mg of sample, weigh it in an aluminum pan, put it in a TG-DTA measuring part set at 30 ° C in advance under a nitrogen atmosphere, and then raise the temperature to 500 ° C at a rate of 10 ° C / min. did.
- Terminal carboxylic acid ratio (%) terminal carboxylic acid number ⁇ 100 / (terminal carboxylic acid number + terminal hydroxyl group number) ⁇ Ratio of urethane bond and amide bond in the chain extension polymer>
- a 13 C-NMR (device: ECA500 manufactured by JEOL Ltd., internal standard chloroform-d: ⁇ 77 ppm) of a sample (chain extension polymer) obtained by reacting polylactic acid and hexamethylene diisocyanate was measured.
- LACEA H400 (Mitsui Chemicals, Mw; 240,000) was obtained by synthesizing a cyclic lactide (dimer) from lactic acid as a raw material and subjecting the lactide to ring-opening polymerization.
- a 2 liter round bottom flask was charged with 300 g of LACEA H400 and 600 g of xylene. After the atmosphere in the flask was replaced with nitrogen, the temperature was raised to 140 ° C. under normal pressure and nitrogen atmosphere. Distilled water (30 g) was added to the flask using a dropping funnel over 5 hours, and the mixture was kept at 140 ° C. and normal pressure for 30 hours.
- PLA polylactic acid
- the weight average molecular weight was measured by the measurement method, and it was 40,000.
- the carboxylic acid value determined by the above measurement method was 9.09 ⁇ 10 ⁇ 5 (mol / g).
- the number average molecular weight Mn calculated from the carboxylic acid value was 11,000.
- the method for obtaining the number average molecular weight (Mn) of PLA from the carboxylic acid value was calculated on the assumption that one carboxyl group and one hydroxyl group exist at the end of one molecule of PLA.
- PLLA (1) transparent poly (L-lactic acid)
- the weight average molecular weight was measured by the above measurement method. As a result, it was 22,000. Moreover, it was 1.25 * 10 ⁇ -4 > (mol / g) when the carboxylic acid value was calculated
- the number average molecular weight Mn calculated from the carboxylic acid value was 8,000.
- PLLA (2) poly (L-lactic acid)
- succinic anhydride was added to the flask, and the mixture was stirred at 150 ° C. for 2 hours to convert poly (L-lactic acid) (hereinafter referred to as “PLLA (2) ) "). Thereafter, the inside of the flask was released to normal pressure, 160 g of xylene was added for dilution, the resulting solution was extracted, and xylene was air-dried under a nitrogen stream. The PLLA (2) was washed twice with 0.5 L of 2-propanol containing 1% of 33% hydrochloric acid, filtered, and further washed several times with methanol to obtain white PLLA (2).
- the terminal carboxylic acid ratio was determined by the above measuring method and found to be 91%. Moreover, when the carboxylic acid value of the PLLA (2) was determined by the above measurement method, it was 2.27 ⁇ 10 ⁇ 4 (mol / g). The number average molecular weight Mn calculated from the carboxylic acid value and the terminal carboxylic acid ratio was 8,000. With respect to the PLLA (2), the Sn content was measured and found to be 5 ppm or less.
- the weight average molecular weight was measured by the measurement method, and it was 20,000. Moreover, when the carboxylic acid value was calculated
- the number average molecular weight Mn calculated from the carboxylic acid value was 7,500.
- Example 1 6.00 g (5.45 ⁇ 10 ⁇ 4 mol) of PLA synthesized in Production Example 1 and 17.02 g of orthodichlorobenzene (hereinafter also referred to as “ODCB”) were charged into a 100 ml round bottom flask. After the atmosphere in the flask was replaced with nitrogen, the temperature was raised to 150 ° C. under normal pressure and nitrogen atmosphere. Next, 0.005 g of bis (acetylacetonato) magnesium and 0.005 g of dibutyltin dilaurate were added into the flask, and then 0.12 g (7.13 ⁇ 10 ⁇ 4 mol) of hexamethylene diisocyanate was added.
- ODCB orthodichlorobenzene
- the reaction was carried out at 150 ° C. for 6 hours. Thereafter, chloroform was added and a precipitation operation with methanol was performed to obtain a white powdery resin.
- the resin was measured for 13 C-NMR by the above measurement method, and the ratio of urethane bond to amide bond (urethane bond / amide bond) was calculated to be 53/47.
- the obtained spectrum data is shown in FIG. With respect to the resin, the weight average molecular weight was measured by the measurement method, and it was 140,000. The resin was allowed to stand in the atmosphere for 1 week, and the weight average molecular weight was measured again by the above measurement method. As a result, it was 140,000 and no change was observed.
- Example 2 A white powder resin was obtained in the same manner as in Example 1 except that bis (acetylacetonato) magnesium was changed to magnesium stearate. The weight average molecular weight of the resin was measured by the above measurement method and found to be 130,000. The resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 130,000, and no change was observed.
- Example 3 A white powder resin was obtained in the same manner as in Example 1 except that bis (acetylacetonato) magnesium was changed to calcium stearate. The weight average molecular weight of the resin was measured by the above measurement method and found to be 130,000. The resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 130,000, and no change was observed.
- Example 4 6.00 g (5.45 ⁇ 10 ⁇ 4 mol) of PLA synthesized in Production Example 1 and 17.02 g of orthodichlorobenzene (hereinafter also referred to as “ODCB”) were charged into a 100 ml round bottom flask. After the atmosphere in the flask was replaced with nitrogen, the temperature was raised to 150 ° C. under normal pressure and nitrogen atmosphere. Next, 0.20 g of succinic anhydride was added to the flask and reacted at 150 ° C. for 5 hours to convert the terminal hydroxyl group of the PLA into a carboxyl group.
- ODCB orthodichlorobenzene
- the weight average molecular weight was measured by the measurement method, and it was 140,000. After being allowed to stand for 1 week in the atmosphere, the weight average molecular weight was measured again by the above measuring method. As a result, it was 140,000 and no change was observed.
- Example 6 Transparent PLLA was obtained in the same manner as in Example 5.
- the PLLA was measured to have a weight average molecular weight of 20,400 by the above measurement method. Further, 4,000 g of succinic anhydride was added and stirred at 150 ° C. for 4 hours to convert the terminal hydroxyl group of the PLLA into a carboxyl group.
- the carboxylic acid value of the PLLA was determined by the above measurement method, it was 3.17 ⁇ 10 ⁇ 4 (mol / g).
- the number average molecular weight Mn calculated from the carboxylic acid value was 6,300.
- Example 7 PLLA (2) synthesized in Production Example 2 (15.00 g, 1.87 ⁇ 10 ⁇ 3 mol), bis (acetylacetonato) magnesium (0.0038 g) and xylene (5.22 g) were charged into a 50 ml round bottom flask. After the atmosphere in the flask was replaced with nitrogen, the temperature was raised to 160 ° C. under normal pressure and nitrogen atmosphere. Hexamethylene diisocyanate 0.43 g (2.6 ⁇ 10 ⁇ 3 mol, 1.3 equivalents) was added and reacted at 160 ° C. for 1 hour. Thereafter, xylene was added for crystallization, followed by filtration and washing with methanol to obtain a white powdery resin.
- the 13 C-NMR of the resin was measured by the above measurement method, and the ratio of urethane bond to amide bond (urethane bond / amide bond) was calculated to be 9/91.
- the ratio of the amide bond coincided with 91% of the terminal carboxylic acid ratio of PLLA (2) synthesized in Production Example 2.
- the weight average molecular weight of the resin was measured by the above measuring method, and was 200,000.
- the crystallinity of the resin was 15%, the melting point was 153 ° C., the glass transition temperature was 60 ° C., and the 5% weight loss temperature was 310 ° C.
- Example 8 A white powdery resin was obtained in the same manner as in Example 7 except that bis (acetylacetonato) magnesium was changed to magnesium chloride. With respect to the resin, the weight average molecular weight was measured by the above measuring method, and it was 259,000. The resin had a crystallinity of 15%, a melting point of 153 ° C., a glass transition temperature of 60 ° C., and a 5% weight loss temperature of 306 ° C.
- Example 9 A white powdery resin was obtained in the same manner as in Example 7 except that bis (acetylacetonato) magnesium was changed to ytterbium triflate. With respect to the resin, the weight average molecular weight was measured by the measurement method, and it was 180,000.
- Example 10 Production Example 2 and a twin-screw segment extruder (2D30W2 manufactured by Toyo Seiki Seisakusho Co., Ltd., inner diameter: 25 mm, L / D; 40) connected to a lab plast mill (4C150-01 manufactured by Toyo Seiki Seisakusho) A mixture of 100 parts by weight of PLLA (2) ′ (1.79 ⁇ 10 ⁇ 4 mol / g) and 0.24 parts by weight of magnesium stearate obtained by the same method was charged at 1 kg / hour.
- hexamethylene diisocyanate was charged at a rate of 0.6 ml / min from the middle of the extruder, and PLLA (2) ′ and hexamethylene diisocyanate were subjected to an extrusion reaction.
- the residence time from feed to discharge was 12 minutes at a screw speed of 140 rpm and a barrel temperature of 180 ° C.
- the strand that emerged was air-cooled with a belt conveyor and then cut with a pelletizer to obtain pellets.
- the weight average molecular weight was measured by the measurement method, and it was 200,000. Further, the melting point by the above measurement method was 155 ° C., and the crystallization temperature was 115 ° C.
- the pellets were preheated at 180 ° C. for 5 minutes and then hot pressed at 10 MPa for 5 minutes to obtain a film having a thickness of 100 ⁇ m. When the tensile strength and elongation of this film were measured, they were 74 MPa and 5%, respectively.
- Example 11 In a round bottom flask, 12 g of xylene and then 0.0012 g of bis (acetylacetonato) magnesium are added to 30 g (5.36 ⁇ 10 ⁇ 3 mol) of PLLA (2) ′ obtained in the same manner as in Production Example 2. I was charged. Furthermore, 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was added and reacted at 130 ° C. for 3 hours. Thereafter, chloroform was added and a precipitation operation with methanol was performed to obtain a white powdery resin. The resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond.
- the weight average molecular weight was measured by the above measurement method, which was 185,000. After being allowed to stand in the atmosphere for 1 week, the weight average molecular weight was measured again by the above measurement method. As a result, it was 185,000 and no change was observed.
- Example 12 Example 11 was repeated except that 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was changed to 1.0308 g (6.13 ⁇ 10 ⁇ 3 mol) of 1,3-xylylene diisocyanate. A white powdery resin was obtained. The resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond. With respect to the resin, the weight average molecular weight was measured by the measurement method, and it was 280,000. The resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 280,000, and no change was observed.
- Example 13 Example 11 except that 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was changed to 1.0357 g (5.33 ⁇ 10 ⁇ 3 mol) of 1,3-bis (isocyanatomethyl) cyclohexane.
- a white powdery resin was obtained.
- the resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond.
- the weight average molecular weight was measured by the measurement method, and it was 280,000.
- the resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 280,000, and no change was observed.
- Example 14 Example 11 except that 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was changed to 1.0297 g (5.30 ⁇ 10 ⁇ 3 mol) of 1,4-bis (isocyanatomethyl) cyclohexane.
- a white powdery resin was obtained.
- the resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond.
- the weight average molecular weight was measured by the measurement method, and it was 160,000.
- the resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 160,000 and no change was observed.
- Example 15 Example 11 except that 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was changed to 1.4117 g (5.38 ⁇ 10 ⁇ 3 mol) of bis (4-isocyanatocyclohexyl) methane.
- a white powdery resin was obtained.
- the resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond.
- the weight average molecular weight was measured by the measurement method, and it was 80,000.
- the resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the measurement method. As a result, it was 80,000 and no change was observed.
- Example 16 Hexamethylene diisocyanate 0.9018 g (5.36 ⁇ 10 ⁇ 3 mol) was changed to 1.1058 g (5.36 ⁇ 10 ⁇ 3 mol) bis (isocyanatomethyl) bicyclo- [2,2,1] -heptane
- a white powder resin was obtained in the same manner as in Example 11 except that.
- the resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond. With respect to the resin, the weight average molecular weight was measured by the measurement method, and it was 140,000.
- the resin was allowed to stand in the atmosphere for 1 week, and the weight average molecular weight was measured again by the above measurement method. As a result, it was 140,000 and no change was observed.
- Example 17 To 30 g (3.95 ⁇ 10 ⁇ 3 mol) of PLLA (4) synthesized in Production Example 3, 12 g of xylene and then 0.0012 g of bis (acetylacetonato) magnesium were charged into a round bottom flask. Furthermore, 0.7651 g (4.55 ⁇ 10 ⁇ 3 mol) of hexamethylene diisocyanate was added and reacted at 130 ° C. for 3 hours. Thereafter, chloroform was added and a precipitation operation with methanol was performed to obtain a white powdery resin. The resin was measured for 13 C-NMR by the above measurement method to confirm the amide bond. The weight average molecular weight of the resin measured by the above measurement method was 330,000. After being allowed to stand for 1 week in the atmosphere, the weight average molecular weight was measured again by the above measuring method. As a result, it was 330,000 and no change was observed.
- Example 1 A white powdery resin was obtained in the same manner as in Example 1 except that bis (acetylacetonato) magnesium was not used. With respect to the resin, the weight average molecular weight was measured by the measurement method, and it was 150,000. The resin was allowed to stand in the atmosphere for 1 week, and then the weight average molecular weight was measured again by the above measuring method.
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Abstract
Description
また、前記脂肪族ポリエステル樹脂(A)は、ヒドロキシカルボン酸から得られることが好ましく、ポリ乳酸であることがより好ましい。前記ポリ乳酸は、乳酸から得られ、該乳酸におけるL体またはD体の含有率が90%以上であることが好ましい。
前記脂肪族ポリエステル樹脂(A)の重量平均分子量が5,000~100,000であり、得られるポリエステル系樹脂(C)の重量平均分子量が、100,000~1,000,000であり、かつ前記脂肪族ポリエステル樹脂(A)の重量平均分子量の3倍以上200倍以下であることが好ましい。
前記ヒドロキシカルボン酸としては、本発明の目的を損なわないものであれば特に限定されないが、例えば、乳酸、グリコール酸、3-ヒドロキシ酪酸、4-ヒドロキシ酪酸、2-ヒドロキシ-n-酪酸、2-ヒドロキシ-3,3-ジメチル酪酸、2-ヒドロキシ-3-メチル酪酸、2-メチル乳酸、2-ヒドロキシ吉草酸、2-ヒドロキシカプロン酸、2-ヒドロキシラウリン酸、2-ヒドロキシミリスチン酸、2-ヒドロキシパルミチン酸、2-ヒドロキシステアリン酸、リンゴ酸、クエン酸、酒石酸、2-ヒドロキシ-3-メチル酪酸、2-シクロヘキシル-2-ヒドロキシ酢酸、マンデル酸、サリチル酸もしくはカプロラクトン等のラクトン類を開環させたもの、またはこれらの混合物などが挙げられる。これらの中でも、使用時の重合速度の増大が特に顕著で、なおかつ入手容易な乳酸、もしくはグリコール酸またはこれらの水溶液が好ましく、乳酸が特に好ましい。前記ヒドロキシカルボン酸が乳酸であると操作性の点で好ましい。また、上記ヒドロキシカルボン酸が乳酸である場合、上記脂肪族ポリエステル樹脂(A)としてポリ乳酸が得られる。また、乳酸にはL体とD体とが存在するが、L体含有率またはD体含有率が大きい方が好ましい。具体的には、L体含有率またはD体含有率は、好ましくは90%以上、より好ましくは95%以上、特に好ましくは98%以上である。L体含有率またはD体含有率が前記範囲内であると、得られる樹脂は高い結晶性を発現する傾向がある。
前記脂肪族ポリエステル樹脂(A)としては、原料の上記ヒドロキシカルボン酸に応じて、ポリ乳酸、ポリグリコール酸、ポリ(3-ヒドロキシ酪酸)、ポリ(4-ヒドロキシ酪酸)、ポリ(2-ヒドロキシ-n-酪酸)、ポリ(2-ヒドロキシ-3,3-ジメチル酪酸)、ポリ(2-ヒドロキシ-3-メチル酪酸)、ポリ(2-メチル乳酸)、ポリ(2-ヒドロキシカプロン酸)、ポリ(2-ヒドロキシ-3-メチル酪酸)、ポリ(2-シクロヘキシル-2-ヒドロキシ酢酸)、ポリ(マンデル酸)もしくはポリカプロラクトン、またはこれらの共重合体もしくは混合物などが挙げられる。
試料を硫酸および過酸化水素により湿式分解後、得られた分解物を1ml定容し、塩酸で40倍に希釈したものを検液として、ICP発光分光分析装置(SHIMADZU社製 ICPS-8100型)によりSn等の重金属の含有量を測定する。該測定方法によるSn等の重金属の含有量の検出限界は、4ppm未満である。
当該工程に用いるポリイソシアネート化合物は、イソシアネート基を2個以上有している化合物であり、本発明の目的を阻害しなければ特に限定されない。イソシアネート基を3個以上有するポリイソシアネート化合物としては、1,6,11-ウンデカントリイソシアネートなどのトリイソシアネート類やポリフェニルメタンポリイソシアネート等の多イソシアネート置換化合物類が挙げられる。前記ポリイソシアネート化合物(B)は、ジイソシアネート化合物であることが好ましい。
本発明においてアミド化触媒とは、上記脂肪族ポリエステル樹脂(A)の末端カルボキシル基部分を優先的に上記ポリイソシアネート化合物(B)と反応させて、アミド結合を形成させる触媒をいう。
本発明のポリエステル系樹脂(C)は、上述のとおり種々の成形加工方法により成形することができ、特に限定されることなく様々な用途に好適に使用することができる。例えば、自動車部品、家電材料部品、電気・電子部品、建築部材、土木部材、農業資材、日用品、各種フィルム、通気性フィルムまたはシートなどに使用することができる。また、一般産業用途及びレクリエーション用途に好適な発泡体として用いられる。さらに、糸やテキスタイル、医療又は衛生用品などの各種用途にも使用することができる。中でも、耐熱性、耐衝撃性が必要とされる自動車材料部品、家電材料部品または電気・電子材料部品に好適に使用することができる。具体的には、自動車部品材料用途では、フロントドア、ホイルキャップなどのこれまで樹脂部品が用いられている部品への展開、家電材料部品用途ではパソコン、ヘッドホンステレオ、携帯電話などの製品の筐体部品への展開、電気・電子部品では、反射材料フィルム・シート、偏光フィルム・シートへの展開が挙げられる。
ゲルパーミエーションクロマトグラフィー(GPC、SHODEX社製GPC-100、カラム:SHODEX社製LF-G、LF-804)(カラム温度40℃、流速1mL/min、クロロホルム溶媒)により、ポリスチレン標準サンプルとの比較で求めた。
DSC(SII社製DSC装置RDC220)により求めた。試料を5~6mg秤量し、窒素シールしたパンに計り込み、窒素シールされた予め30℃に設定されたDSC測定部に装入した後、10℃/minの昇温速度で200℃まで昇温した。その後、99℃/minの降温速度で10℃まで降温した。さらに、10℃/minの昇温速度で200℃まで昇温した。2回目の昇温時の結晶融解エンタルピー(ΔHm)を測定し、[[(ΔHm)/(ΔH0)]×100]を求め、結晶化度とした。ここでΔH0は完全理想結晶融解エンタルピーを表し、ポリ乳酸の数値93J/gを使用した。
DSC(SII社製DSC装置RDC220)により求めた。試料を5~6mg秤量し、窒素シールしたパンに計り込み、窒素シールされた予め30℃に設定されたDSC測定部に装入した後、10℃/minの昇温速度で200℃まで昇温した。
DSC(SII社製DSC装置RDC220)により求めた。試料を5~6mg秤量し、窒素シールしたパンに計り込み、窒素シールされた予め30℃に設定されたDSC測定部に装入した後、10℃/minの昇温速度で200℃まで昇温した。
TG-DTA(SII社製DSC装置TG-DTA-320)により求めた。試料を5~6mg秤量し、アルミパンに計り込み、窒素雰囲気下で予め30℃に設定されたTG-DTA測定部に装入した後、10℃/minの昇温速度で500℃まで昇温した。
測定対象ポリマー0.5gに対してクロロホルム/メタノール=7/3の混合溶媒を20mL加え、完全にポリマーを溶解させた。その後、指示薬としてブロムチモールブルー/フェノールレッド混合のエタノール溶液を2滴加えると、黄色を呈した。0.1Nアルコール性水酸化カリウム溶液で滴定を行い、色が黄色から薄紫色に変化した点を終点とし、ポリマーのカルボン酸価を求めた。
ポリ乳酸と無水コハク酸とを反応させて得られた試料の1H-NMR(装置:日本電子製ECA500、内部標準テトラメチルシラン:δ=0ppm)を測定した。このスペクトルにおいて、
δ=2.2ppm(マルチプレット):
ポリ乳酸末端に反応したコハク酸ユニットのメチレン鎖水素由来(4H)
δ=4.5ppm(カルテット):
ポリ乳酸鎖末端ヒドロキシル基のα位のメチン水素由来(1H)
δ=4.9ppm(マルチプレット):
ポリ乳酸鎖内部のメチン水素由来(重合乳酸数H)
以上3種の積分値の比率より、末端カルボン酸数(=ポリ乳酸カルボキシル基数+コハク酸化された末端カルボキシル基数)と末端ヒドロキシル基数(未反応のポリ乳酸末端ヒドロキシル基数)から、末端カルボン酸率を計算した。
<鎖延長ポリマーにおけるウレタン結合とアミド結合との比率>
ポリ乳酸とヘキサメチレンジイソシアネートとを反応させて得られた試料(鎖延長ポリマー)の13C-NMR(装置:日本電子製ECA500、内部標準クロロホルム-d:δ=77ppm)を測定した。このスペクトルにおいて、
δ=39ppm:
アミド結合に隣接したヘキサメチレンユニットのα位の炭素由来
δ=41ppm:
ウレタン結合に隣接するヘキサメチレンユニットのα位の炭素由来
以上2種の積分値の比率より、鎖延長ポリマーにおけるウレタン結合とアミド結合との比率(ウレタン結合/アミド結合)を求めた。この比率は、鎖延長ポリマーにおける末端ヒドロキシル基数と末端カルボン酸数との比率とほぼ一致した。
原料の乳酸から環状ラクチド(二量体)を合成し、該ラクチドを開環重合することにより、LACEA H400(三井化学社製、Mw;240,000)が得られた。2リットルの丸底フラスコにLACEA H400を300gとキシレンを600g装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、140℃まで昇温した。該フラスコ内に蒸留水30gを、滴下漏斗を用いて5時間かけて加え、140℃、常圧で30時間保持した。その後、クロロホルムを加え、メタノールで沈殿操作を行うことで白色粉末のポリ乳酸(以下「PLA」とも記す。)が得られた。該PLAについて、上記測定方法により重量平均分子量を測定したところ、40,000であった。また、上記測定方法によりカルボン酸価を求めたところ、9.09×10-5(mol/g)であった。カルボン酸価から計算した数平均分子量Mnは11,000であった。カルボン酸価からPLAの数平均分子量(Mn)を求める方法は、1分子のPLAの末端に、カルボキシル基とヒドロキシル基が一つずつあるとして計算した。すなわち、カルボン酸価が9.09×10-5(mol/g)の場合、1gのPLA中には、9.09×10-5(mol)のPLA分子があることになるので、Mnは、1/(9.09×10-5)=11,000となった。
Purac社の90%L-乳酸(L体が99.5%の乳酸)333.00g(3.327mol)と試薬の塩化スズ(II)二水和物(和光純薬社製)1.82gをディーンスタークトラップが備え付けられた500mlの丸底フラスコに装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、140℃まで昇温した。140℃、常圧、窒素雰囲気下で1時間保持した後、該フラスコ内を減圧し、140℃、50mmHgで2時間保持した。次に、該フラスコ内を常圧まで放圧した後、該フラスコ内にキシレンを17.02g加えた。次に、ディーンスタークトラップを、キシレンが充満されたディーンスタークトラップに交換した。次に該フラスコ内を500mmHgに減圧してから昇温し、155℃、500mmHgで10時間保持し、透明なポリ(L-乳酸)(以下「PLLA(1)」とも記す。)が得られた。該PLLA(1)について、上記測定方法により重量平均分子量を測定したところ、22,000であった。また、上記測定方法によりカルボン酸価を求めたところ、1.25×10-4(mol/g)であった。カルボン酸価から計算した数平均分子量Mnは8,000であった。
Purac社のL-ラクチド500.00g(3.469mol)を1000mlの丸底フラスコに装入し窒素置換した。その後、キシレン200mlを装入し、常圧、窒素雰囲気下で、140℃まで昇温した。Purac社の90%L-乳酸(L体が99.8%の乳酸)3.15g(0.032mol)、ついでオクタン酸スズ0.1300g(0.32mmol)を加え、140℃で2時間保持することで透明なポリ(L-乳酸)(以下「PLLA(3)」とも記す。)が得られた。該PLLA(3)について、上記測定方法により重量平均分子量を測定したところ、20,000であった。また、上記測定方法によりカルボン酸価を求めたところ、1.31×10-4(mol/g)であった。カルボン酸価から計算した数平均分子量Mnは7,600であった。
製造例1で合成したPLA6.00g(5.45×10-4mol)とオルトジクロロベンゼン(以下「ODCB」とも記す。)17.02gとを100mlの丸底フラスコに装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、150℃まで昇温した。次に、該フラスコ内に、ビス(アセチルアセトナト)マグネシウム0.005g、ジブチルスズジラウリレート0.005gを加えた後、ヘキサメチレンジイソシアネート0.12g(7.13×10-4 mol)を加え、150℃で6時間反応させた。その後、クロロホルムを加え、メタノールで沈殿操作を行うことで白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、ウレタン結合とアミド結合との比率(ウレタン結合/アミド結合)を算出したところ、53/47であった。得られたスペクトルデータを図1に示す。該樹脂について、上記測定方法により重量平均分子量を測定したところ、140,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、140,000であり変化が見られなかった。
ビス(アセチルアセトナト)マグネシウムを、ステアリン酸マグネシウムに変更した以外は実施例1と同様にして白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、130,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、130,000であり変化が見られなかった。
ビス(アセチルアセトナト)マグネシウムを、ステアリン酸カルシウムに変更した以外は実施例1と同様にして白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、130,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、130,000であり変化が見られなかった。
製造例1で合成したPLA6.00g(5.45×10-4mol)とオルトジクロロベンゼン(以下「ODCB」とも記す。)17.02gとを100mlの丸底フラスコに装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、150℃まで昇温した。次に、該フラスコ内に無水コハク酸を0.20g加え、150℃で5時間反応を行い、前記PLAの末端ヒドロキシル基をカルボキシル基に変換した。次に、該フラスコ内に、ビス(アセチルアセトナト)マグネシウム0.005g、ジブチルスズジラウリレート0.005gを加えた後、ヘキサメチレンジイソシアネート0.12g(7.13×10-4 mol)を加え、150℃で4時間反応させた。その後、クロロホルムを加え、メタノールで沈殿操作を行うことで白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、100,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、100,000であり変化が見られなかった。
Purac社の90%L-乳酸(L体が99.9%の乳酸)333.00g(3.327mol)と試薬の塩化スズ(II)二水和物(和光純薬社製)0.137gをディーンスタークトラップが備え付けられた500mlの丸底フラスコに装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、140℃まで昇温した。140℃、常圧、窒素雰囲気下で1時間保持した後、該フラスコ内を減圧し、140℃、50mmHgで2時間保持した。次に、該フラスコ内を常圧まで放圧した後、該フラスコ内にODCBを17.02g加えた。次に、ディーンスタークトラップを、モレキュラーシーブ3A(和光純薬社製)30g入りのODCBが充満されたディーンスタークトラップに交換した。次に該フラスコ内を10mmHgに減圧してから昇温し、160℃、10mmHgで17時間保持し、透明なポリ(L-乳酸)(以下「PLLA」とも記す。)が得られた。該PLLAについて、上記測定方法により重量平均分子量を測定したところ、23,000であった。また、上記測定方法によりカルボン酸価を求めたところ、1.50×10-4(mol/g)であった。カルボン酸価から計算した数平均分子量Mnは6,700であった。
実施例5と同様にして透明なPLLAを得た。該PLLAについて、上記測定方法により重量平均分子量を測定したところ、20,400であった。さらに、無水コハク酸4.000gを加え、150℃で4時間攪拌し、前記PLLAの末端ヒドロキシル基をカルボキシル基に変換した。該PLLAについて、上記測定方法によりカルボン酸価を求めたところ、3.17×10-4(mol/g)であった。カルボン酸価から計算した数平均分子量Mnは6,300であった。カルボン酸価からPLLAの数平均分子量(Mn)を求める方法は、末端ヒドロキシル基をカルボキシル基に変換した場合、1分子のPLLAの末端に、二つのカルボキシル基があるとして計算した。すなわち、カルボン酸価が3.17×10-4(mol/g)の場合、1gのPLLA中には、3.17×10-4(mol)の半分量のPLLA分子があることになるので、Mnは、1/(3.17×10-4)×2=6300となった。
製造例2で合成したPLLA(2)15.00g(1.87×10-3mol)、ビス(アセチルアセトナト)マグネシウム0.0038gおよびキシレン5.22gを50mlの丸底フラスコに装入した。該フラスコ内を窒素置換後、常圧、窒素雰囲気下で、160℃まで昇温した。ヘキサメチレンジイソシアネート0.43g(2.6×10-3 mol、1.3当量)を加え、160℃で1時間反応させた。その後、キシレンを加え晶析させ、ろ過後、メタノールで洗浄することで白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、ウレタン結合とアミド結合との比率(ウレタン結合/アミド結合)を算出したところ、9/91であった。アミド結合の比率は製造例2で合成したPLLA(2)の末端カルボン酸率の91%と一致した。
ビス(アセチルアセトナト)マグネシウムを、塩化マグネシウムに変更した以外は実施例7と同様にして白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、259,000であった。該樹脂の結晶化度は15%、融点は153℃、ガラス転移温度は60℃、5%重量減少温度は306℃であった。
ビス(アセチルアセトナト)マグネシウムを、イッテルビウムトリフラートに変更した以外は実施例7と同様にして白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、180,000であった。
ラボプラストミル((株)東洋精機製作所製 4C150-01)に連結された二軸セグメント押出機((株)東洋精機製作所製2D30W2、内径;25mm、L/D;40)に、製造例2と同様の方法で得られたPLLA(2)'(1.79×10-4mol/g)100重量部とステアリン酸マグネシウム0.24重量部との混合物を、1kg/時間で装入した。さらに、前記押出機の途中よりヘキサメチレンジイソシアネートを0.6ml/分で装入し、PLLA(2)'とヘキサメチレンジイソシアネートとを押出反応させた。スクリューの回転数140rpm、バレル温度180℃で、原料フィードから吐出までの滞留時間は12分だった。出てきたストランドをベルトコンベアーで空冷し、続けてペレタイザーでカッティングすることでペレットを得た。該ペレットについて、上記測定方法により重量平均分子量を測定したところ、200,000であった。また、上記測定方法による融点は155℃、結晶化温度は115℃だった。また該ペレットを、180℃で5分間予熱した後、10MPaで5分間熱プレスすることにより、厚さ100μmのフィルムが得られた。このフィルムの引張強度、伸びを測定したところ、それぞれ74MPa、5%であった。
製造例2と同様の方法で得られたPLLA(2)'30g(5.36×10-3mol)に対して、キシレン12g、次いでビス(アセチルアセトナト)マグネシウム0.0012gを丸底フラスコに装入した。さらに、ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を加え130℃で3時間反応させた。その後、クロロホルムを加え、メタノールで沈殿操作を行うことで白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、185,000であった。大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、185,000であり変化が見られなかった。
ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を、1,3-キシリレンジイソシアネート1.0308g(6.13×10-3mol)に変更した以外は実施例11と同様にして白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、280,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、280,000であり変化が見られなかった。
ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を、1,3-ビス(イソシアナトメチル)シクロヘキサン1.0357g(5.33×10-3mol)に変更した以外は実施例11と同様にして白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、280,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、280,000であり変化が見られなかった。
ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を、1,4-ビス(イソシアナトメチル)シクロヘキサン1.0297g(5.30×10-3mol)に変更した以外は実施例11と同様にして白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、160,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、160,000であり変化が見られなかった。
ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を、ビス(4-イソシアナトシクロヘキシル)メタン1.4117g(5.38×10-3mol)に変更した以外は実施例11と同様にして白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、80,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、80,000であり変化が見られなかった。
ヘキサメチレンジイソシアネート0.9018g(5.36×10-3mol)を、ビス(イソシアナトメチル)ビシクロ-[2,2,1]-ヘプタン1.1058g(5.36×10-3mol)に変更した以外は実施例11と同様にして白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、140,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、140,000であり変化が見られなかった。
製造例3で合成したPLLA(4)30g(3.95×10-3mol)に対して、キシレン12g、次いでビス(アセチルアセトナト)マグネシウム0.0012gを丸底フラスコに装入した。さらに、ヘキサメチレンジイソシアネート0.7651g(4.55×10-3mol)を加え130℃で3時間反応させた。その後、クロロホルムを加え、メタノールで沈殿操作を行うことで白色粉末の樹脂が得られた。上記測定方法により該樹脂の13C-NMRを測定し、アミド結合を確認した。該樹脂について、上記測定方法により重量平均分子量を測定したところ、330,000であった。大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、330,000であり変化が見られなかった。
ビス(アセチルアセトナト)マグネシウムを用いなかったこと以外は実施例1と同様にして、白色粉末の樹脂が得られた。該樹脂について、上記測定方法により重量平均分子量を測定したところ、150,000であった。該樹脂について、大気下で1週間放置した後、再度上記測定方法により重量平均分子量を測定したところ、80,000まで低下していた。
Claims (21)
- 前記脂肪族ポリエステル樹脂(A)が、ヒドロキシカルボン酸から得られることを特徴とする請求項1に記載のポリエステル系樹脂(C)。
- 前記脂肪族ポリエステル樹脂(A)がポリ乳酸であることを特徴とする請求項1または2に記載のポリエステル系樹脂(C)。
- 前記ポリ乳酸が乳酸から得られ、該乳酸におけるL体またはD体の含有率が90%以上であることを特徴とする請求項3に記載のポリエステル系樹脂(C)。
- 結晶化度が10~70%であることを特徴とする請求項1~4のいずれか1項に記載のポリエステル系樹脂(C)。
- 前記ポリイソシアネート化合物(B)が、脂肪族ジイソシアネート化合物であることを特徴とする請求項1~5のいずれか1項に記載のポリエステル系樹脂(C)。
- 前記ポリイソシアネート化合物(B)が、ヘキサメチレンジイソシアネート、イソホロンジイソシアネート、1,3-(ビスイソシアナトメチル)シクロヘキサン、ビス(イソシアナトメチル)ビシクロ-[2,2,1]-ヘプタンおよびビス(4-イソシアナトシクロヘキシル)メタンからなる群より選ばれる1種の化合物であることを特徴とする請求項1~6のいずれか1項に記載のポリエステル系樹脂(C)。
- 重量平均分子量が100,000~1,000,000であることを特徴とする請求項1~7のいずれか1項に記載のポリエステル系樹脂(C)。
- 下記式(2)~(4)からなる群より選ばれる少なくとも1種の式で表される構成単位を主成分として有することを特徴とする請求項1~8のいずれか1項に記載のポリエステル系樹脂(C)。
- 前記脂肪族ポリエステル樹脂(A)の重量平均分子量が5,000~100,000であり、
得られるポリエステル系樹脂(C)の重量平均分子量が、100,000~1,000,000であり、かつ前記脂肪族ポリエステル樹脂(A)の重量平均分子量の3倍以上200倍以下であることを特徴とする請求項1~9のいずれか1項に記載のポリエステル系樹脂(C)。 - 脂肪族ポリエステル樹脂(A)およびポリイソシアネート化合物(B)をアミド化触媒の存在下で反応させる工程を含むことを特徴とする請求項1に記載のポリエステル系樹脂(C)の製造方法。
- 前記ポリイソシアネート化合物(B)が、ジイソシアネート化合物であることを特徴とする請求項11に記載のポリエステル系樹脂(C)の製造方法。
- 前記脂肪族ポリエステル樹脂(A)が、末端ヒドロキシル基をカルボキシル基に変換した脂肪族ポリエステル樹脂であることを特徴とする請求項11または12に記載のポリエステル系樹脂(C)の製造方法。
- 前記ポリイソシアネート化合物(B)の添加量が、前記脂肪族ポリエステル樹脂(A)に対して0.8~2.0倍モルであることを特徴とする請求項11~13のいずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 前記脂肪族ポリエステル樹脂(A)の重量平均分子量が5,000~100,000であることを特徴とする請求項11~14のいずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 前記脂肪族ポリエステル樹脂(A)のSn含有量が300ppm以下であることを特徴とする請求項11~15のいずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 前記アミド化触媒が、周期律表第1族、2族および3族における金属群より選ばれる少なくとも1種の金属を含むことを特徴とする請求項11~16のいずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 前記アミド化触媒が、マグネシウムまたはカルシウムを含むことを特徴とする請求項11~17のいずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 2軸押出機で反応を行うことを特徴とする請求項11~18いずれか1項に記載のポリエステル系樹脂(C)の製造方法。
- 請求請1~10のいずれか1項に記載のポリエステル系樹脂(C)を含有することを特徴とするフィルム。
- 請求項1~10のいずれか1項に記載のポリエステル系樹脂(C)を含有することを特徴とする成型体。
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2009
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Cited By (8)
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WO2011002004A1 (ja) | 2009-06-30 | 2011-01-06 | 三井化学株式会社 | ポリ乳酸系樹脂、ポリ乳酸系樹脂の製造方法、ポリ乳酸樹脂組成物、ステレオコンプレックスポリ乳酸樹脂組成物およびステレオコンプレックスポリ乳酸樹脂組成物の製造方法 |
KR101427459B1 (ko) | 2009-06-30 | 2014-08-08 | 미쓰이 가가쿠 가부시키가이샤 | 폴리락트산계 수지, 폴리락트산계 수지의 제조 방법, 폴리락트산 수지 조성물, 스테레오컴플렉스 폴리락트산 수지 조성물 및 스테레오컴플렉스 폴리락트산 수지 조성물의 제조 방법 |
JP2013189656A (ja) * | 2013-07-05 | 2013-09-26 | Mitsui Chemicals Inc | 熱成形品 |
JP2014088579A (ja) * | 2014-02-03 | 2014-05-15 | Mitsui Chemicals Inc | ブロー成型品 |
EP2944663A2 (en) | 2014-05-13 | 2015-11-18 | Ricoh Company, Ltd. | Aliphatic polyester, method of preparing the same, and polymer organizer |
JP2018532853A (ja) * | 2015-10-13 | 2018-11-08 | 中国石油化工股▲ふん▼有限公司 | 選択的レーザー焼結に好適な脂肪族ポリエステル樹脂粉末及びその調製方法 |
JP2019172756A (ja) * | 2018-03-27 | 2019-10-10 | 三菱ケミカル株式会社 | ポリエステル系樹脂組成物の製造方法及びポリエステル系樹脂組成物並びに成形体 |
JP7151122B2 (ja) | 2018-03-27 | 2022-10-12 | 三菱ケミカル株式会社 | ポリエステル系樹脂組成物の製造方法及びポリエステル系樹脂組成物並びに成形体 |
Also Published As
Publication number | Publication date |
---|---|
BRPI0908279A2 (pt) | 2018-05-29 |
TWI457365B (zh) | 2014-10-21 |
EP2251368A4 (en) | 2014-08-27 |
CN101945914B (zh) | 2012-12-26 |
KR101284931B1 (ko) | 2013-07-10 |
US8552138B2 (en) | 2013-10-08 |
EP2251368A1 (en) | 2010-11-17 |
TW200951161A (en) | 2009-12-16 |
JPWO2009110472A1 (ja) | 2011-07-14 |
CN101945914A (zh) | 2011-01-12 |
US20110040065A1 (en) | 2011-02-17 |
EP2251368B1 (en) | 2016-09-28 |
KR20100126780A (ko) | 2010-12-02 |
JP5391189B2 (ja) | 2014-01-15 |
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