WO2005079607A1 - 酸素吸収剤およびその製造方法ならびにそれを用いた酸素吸収性組成物および包装材 - Google Patents
酸素吸収剤およびその製造方法ならびにそれを用いた酸素吸収性組成物および包装材 Download PDFInfo
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- WO2005079607A1 WO2005079607A1 PCT/JP2005/002333 JP2005002333W WO2005079607A1 WO 2005079607 A1 WO2005079607 A1 WO 2005079607A1 JP 2005002333 W JP2005002333 W JP 2005002333W WO 2005079607 A1 WO2005079607 A1 WO 2005079607A1
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- oxygen
- group
- organic compound
- inorganic particles
- oxygen absorbent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L3/00—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs
- A23L3/34—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals
- A23L3/3409—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor
- A23L3/3418—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
- A23L3/3427—Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O in which an absorbent is placed or used
- A23L3/3436—Oxygen absorbent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3202—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the carrier, support or substrate used for impregnation or coating
- B01J20/3204—Inorganic carriers, supports or substrates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/32—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating
- B01J20/3231—Impregnating or coating ; Solid sorbent compositions obtained from processes involving impregnating or coating characterised by the coating or impregnating layer
- B01J20/3242—Layers with a functional group, e.g. an affinity material, a ligand, a reactant or a complexing group
Definitions
- Oxygen absorbent method for producing the same, and oxygen-absorbing composition and packaging material using the same
- the present invention relates to an oxygen absorbent, a method for producing the same, and an oxygen-absorbing composition and a packaging material using the same.
- the present invention provides an oxygen absorbent capable of constituting a resin composition having a high oxygen absorbing ability, a method for producing the same, and an oxygen-absorbing resin composition using the same.
- One of the purposes is to provide packaging materials.
- the oxygen absorbent of the present invention includes inorganic particles, an organic compound (organic group) chemically adsorbed to the inorganic particles, and an oxygen absorption promoter.
- the organic compound is such that at least one organic compound (A) selected from the group consisting of a carboxylic acid, an ester, an aldehyde, an alkoxysilane derivative, and an amine is reacted with the inorganic particles. May be an organic compound formed thereby.
- the organic compound may be an unsaturated organic compound.
- the organic compound may include a structure represented by the following formula (1).
- R 3 is one selected from the group consisting of an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkylaryl group, and an alkylaryl group having a substituent.
- the organic compound may include a structure represented by the following formula (2).
- R 4 and R 5 each independently represent a hydrogen atom, an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkyl aryl group, an alkyl group having a substituent;
- R 3 is one selected from the group consisting of an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkylaryl group, and an alkylaryl group having a substituent.
- the organic compound may have an unsaturated alicyclic structure.
- the formula weight of the organic compound may be 3000 or less.
- the inorganic particles may be composed of a layered inorganic compound.
- the inorganic particles may have a hydroxyl group on the surface.
- the inorganic particles may be particles of hydrated talcite.
- the oxygen absorption promoter may be at least one selected from a transition metal salt, a radical generator, and a photocatalytic power.
- the production method of the present invention is a method for producing an oxygen absorbent containing inorganic particles and an oxygen absorption promoter, and includes a step of chemically adsorbing an organic compound to the inorganic particles.
- the organic compound may be an unsaturated organic compound.
- the inorganic particles may have a hydroxyl group on the surface, and the organic compound may have a functional group that reacts with the hydroxyl group.
- the organic compound may be at least one organic compound selected from the group consisting of a carboxylic acid, an ester, an aldehyde, an alkoxysilane derivative, and an amine.
- the production method of the present invention includes: (i) a step of preparing a mixture containing the organic compound, the inorganic particles, and an organic solvent; and (ii) a step of removing the organic solvent from the mixture. May be.
- the method may include a step of heating the mixture at a temperature equal to or higher than the boiling point of water after the step (ii).
- the production method of the present invention includes: (I) a step of preparing a mixture containing the organic compound and the inorganic particles; and (II) a step of heating the mixture to chemically convert the organic compound to the inorganic particles. And adsorbing.
- the step (ii) may include a step of heating the mixture at a temperature equal to or higher than the boiling point of water.
- the mixture may be heated under a nitrogen atmosphere or under reduced pressure.
- the inorganic particles may be composed of a layered inorganic compound.
- another oxygen absorbent of the present invention is an oxygen absorbent produced by the production method of the present invention.
- the oxygen-absorbing composition of the present invention is an oxygen-absorbing composition comprising a resin and an oxygen-absorbing agent dispersed in the resin, wherein the oxygen-absorbing agent is the oxygen-absorbing composition of the present invention. Agent.
- the resin may include an ethylene butyl alcohol copolymer.
- the packaging material of the present invention includes a portion composed of the oxygen-absorbing composition of the present invention.
- the oxygen absorbent of the present invention is in the form of particles, it is easy to uniformly disperse it in resin. Further, the oxygen absorbent of the present invention exhibits high oxygen absorbing ability because the organic compound to be oxidized is chemically adsorbed on the inorganic particles.
- an oxygen absorbent in which an organic compound to be oxidized is chemically adsorbed to inorganic particles can be easily obtained.
- the oxygen-absorbing resin composition of the present invention uses the oxygen-absorbing agent of the present invention, it exhibits high oxygen-absorbing ability and can suppress occurrence of bleed-out. Further, when the oxygen absorbent is blended with the resin, the organic compound to be oxidized can be prevented from volatilizing from the vent. Further, even when the oxygen absorbent is washed before blending the oxygen absorbent with the resin, the removal of the oxidized organic compound can be prevented.
- a resin composition it is possible to obtain a packaging material having high oxygen absorbing ability, excellent moldability, and high safety in food hygiene. Further, by using such a packaging material, it is possible to reduce oxygen inside the package formed using the packaging material.
- FIG. 1 is a graph showing an example of the oxygen absorbing ability of the oxygen absorbent of the present invention and a comparative example.
- FIG. 2 is a view showing one example of an infrared absorption spectrum of the oxygen absorbent of the present invention.
- FIG. 3 is a graph showing an example of the oxygen absorbing ability of the oxygen absorbent of the present invention.
- FIG. 4 is a graph showing another example of the oxygen absorbing ability of the oxygen absorbent of the present invention.
- FIG. 5 is a graph showing another example of the oxygen absorbing ability of the oxygen absorbent of the present invention.
- FIG. 6 is a graph showing an example of the oxygen absorbing ability of a press film according to the present invention which also has the oxygen absorbing composition strength.
- Embodiment 1 describes the oxygen absorbent of the present invention.
- the oxygen absorbent of the present invention contains inorganic particles, an organic compound (organic group) chemically adsorbed to the inorganic particles, and an oxygen absorption promoter.
- the organic compound is an unsaturated organic compound containing a carbon-carbon double bond. In that case, it is preferable that the methylene group adjacent to the unsaturated bond is not substituted. According to such a configuration, a high oxygen absorbing ability can be obtained, and generation of a low-molecular compound due to oxidation of the organic compound can be suppressed.
- the organic compound may include a structure represented by the following formula (1) or (2)!
- R 1 and R are each independently a hydrogen atom, an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkyl aryl group, an alkyl aryl having a substituent.
- R 3 is one selected from the group consisting of an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkylaryl group, and an alkylaryl group having a substituent.
- R 4 and R 5 each independently represent a hydrogen atom, an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkyl aryl group, an alkyl group having a substituent;
- R 3 is one selected from the group consisting of an alkyl group, an alkyl group having a substituent, an aryl group, an aryl group having a substituent, an alkylaryl group, and an alkylaryl group having a substituent.
- Rl, R2, R3, R4 and R5 are an alkyl group having a substituent, an aryl group having a substituent, or an alkylaryl group having a substituent
- the substituent is a parent to a resin.
- a hydroxyl group and an alkoxy group having 11 to 10 carbon atoms, which are preferable to improve the compatibility, can be exemplified.
- the organic compound chemically adsorbed on the inorganic particles includes an organic compound having a functional group that reacts with the surface of the inorganic particles (hereinafter, may be referred to as an organic compound (A)) and the surface of the inorganic particles. It is formed by reacting.
- the ratio of the inorganic particles, the organic compound (A) chemically adsorbed to the inorganic particles, and the oxygen absorption promoter is not particularly limited and is determined according to the material used and the purpose of use.
- the amount of the organic compound (A) adsorbed on 100 parts by weight of the inorganic particles is in the range of 1 part by weight to 100 parts by weight, preferably in the range of 1 part by weight to 50 parts by weight. .
- a transition metal salt as an oxygen absorption-promoting agent is an organic compound Contact
- it may amount to 10 4 range of parts by one 5 parts by weight of a transition metal salt.
- the amount of the oxygen absorption enhancer is 0.1% by weight based on 100 parts by weight of the organic compound (A). It may be in the range of 100 parts by weight.
- the average particle diameter of the inorganic particles is not particularly limited, for example, 100 nm or less, preferably 500 nm or less.
- the organic compound (A) can be efficiently chemically adsorbed by increasing the surface area. Further, the dispersibility in resin can be improved, and transparency can be imparted.
- the inorganic particles preferably have a reactive functional group on the surface, and particularly preferably have a hydroxyl group on the surface. Further, the inorganic particles are preferably made of a layered inorganic compound. Examples of the layered conjugate include layered double hydroxides such as talc and talc, layered clay minerals such as montmorillonite and kaolinite, layered silicates such as kanemaniite, and layered metal phosphates. And layered copper hydroxide. By layer-separating the particles composed of the layered product, it is possible to produce an oxygen-absorbing composition and a packaging material having high gas barrier properties.
- the surface area can be increased, a functional group having substantially high reactivity can be effectively used, and more organic compound (A) can be adsorbed.
- the amount of the organic compound (A) adsorbed on the talcite can be increased by using the talcite in the mouth as the inorganic particles.
- talcite at the mouth is a neutral compound having both acid and base sites, the composition can be stably formed without disturbing the resin itself even when dispersed in various resins. . For this reason, the talcite in the mouth opening and the mouth opening can exhibit stable oxygen absorption even when used in the oxygen absorbing composition.
- the organic compound (A) contains a functional group that reacts with the surface of the inorganic particle, and when the inorganic particle contains a hydroxyl group on the surface, it contains a functional group that reacts with the hydroxyl group.
- the functional group having high reactivity with a hydroxyl group include a carboxyl group, an ester group, an aldehyde group, an alkoxysilyl group, and an amino group. That is, the organic compound (A) includes, for example, at least one compound selected from the group consisting of carboxylic acids, esters, aldehydes, alkoxysilane derivatives and amines.
- a part of the organic compound (A) (for example, a hydrogen atom or a hydroxyl group) is contained in the inorganic particles.
- the functional group to be reacted is a carboxyl group, an ester group or an aldehyde group, it binds to the inorganic particles at such a Co— moiety.
- the reactive functional group is an alkoxysilyl group, it binds to the inorganic particles at the -Si-O- portion or the like.
- the reacting functional group is an amino group, it binds to the inorganic particles at the nitrogen portion or the like.
- the organic compound (A) and the organic compound chemically adsorbed to the inorganic particles include a carboxylic acid, an ester, an aldehyde, an alkoxysilane derivative, It may be at least one compound selected from the group consisting of amines.
- the organic compound (A) and the organic compound chemically adsorbed to the inorganic particles include a carboxylic acid, an ester, an aldehyde, and an alkoxyl compound having the structure represented by the above formula (2). It may be at least one compound selected from the group consisting of a silane derivative and an amine.
- the organic compound (A) and the organic compound chemically adsorbed to the inorganic particles have an unsaturated alicyclic structure of up to 10-membered ring, such as a carboxylic acid or an ester. And at least one compound selected from the group consisting of aldehydes, derivatives, and amines.
- an unsaturated alicyclic structure such as a carboxylic acid or an ester.
- at least one compound selected from the group consisting of aldehydes, derivatives, and amines By using a compound having an unsaturated alicyclic structure, it is possible to suppress the decomposition of the organic compound (A) and the generation of low-molecular substances during the absorption of oxygen, thereby reducing the odor associated with the absorption of oxygen. Can be suppressed.
- the hydrogen bonded to the carbon constituting the cyclic structure may be substituted by another substituent.
- substituents When a plurality of substituents are present, they may be the same or different.
- substituents include a hydrogen atom, an alkyl group which may have a substituent, an alkoxy group which may have a substituent, a halogen atom, a cyclic substituent including a methylene group, and an oxymethylene group. Including cyclic substituents.
- carboxylic acids applicable as the organic compound (A) include, for example, palmitoleic acid, oleic acid, linoleic acid, linolenic acid, arachidonic acid, docosahexanoic acid, eicosapentaenoic acid, parinaric acid, dimer And unsaturated carboxylic acids such as acids, flax oil fatty acids, soybean oil fatty acids, tung oil fatty acids, sugar oil fatty acids, sesame oil fatty acids, cottonseed oil fatty acids, rapeseed oil fatty acids, fish oil fatty acids, and tall oil fatty acids.
- an oxygen absorbent having a high oxygen absorption capacity and a high oxygen absorption capacity per molecule can be obtained.
- unsaturated carboxylic acids for example, saturated aliphatic monocarboxylic acids such as formic acid, acetic acid, propionic acid, butyric acid, and stearic acid; oxalic acid, malonic acid, and succinic acid Saturated aliphatic dicarboxylic acids such as acids, glutaric acid, adipic acid, and sebacic acid; benzoic acid, phthalic acid, terephthalic acid and / or aromatic carboxylic acids can also be used.
- esters applicable as the organic compound (A) include the esters of the above carboxylic acids.
- Typical aldehydes applicable as the organic compound (A) include, for example, crotonaldehyde, senesionaldehyde, pentenal, hexenal, 7-otatenal, nonenal, desenal, 2,4-hexagenal, 3 — Cyclohexenecarboxaldehyde, 5-norbornene-2 carbotasaldehyde, acrolein, methacrolein and the like.
- unsaturated aldehydes for example, acetoaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, valeraldehyde, isovaleraldehyde, hexanal, octanal, Saturated aliphatic aldehydes such as nonanal, decanal and nonandial can also be applied.
- Examples of a typical alkoxysilane derivative applicable as the organic compound (A), that is, a compound having an alkoxysilyl group include a compound containing a trimethoxysilyl group, a triethoxysilyl group, or the like.
- the portion other than the alkoxysilyl group is not particularly limited, but may be, for example, halogen, an alkyl group optionally having a substituent, an alkyl group optionally having a substituent, or a group having a substituent.
- Typical amines applicable as the organic compound (A) include, for example, arylamine, oleylamine, N-methylallylamine, diarylamine, N, N'-ethyl-2-butene-1,4-diamine , N-arylcyclopentylamine, arylcyclohexylamine, 2- (1-cyclohexyl) ethylamine and the like.
- Photocatalyst for oxygen absorption promoter When used, in addition to the above unsaturated amines, for example, methylamine, ethylamine, propylamine, isopropylamine, butylamine, isobutylamine, secondary butylamine, tertiary butylamine, amylamine, isoamylamine, tertiary amylamine, Hexylamine, heptylamine, octylamine, norlamine, decylamine, dimethylamine, getylamine, dipropylamine, dibutylamine, diisobutylamine, dipentylamine, dihexylamine, dioctylamine, ethylenediamine,
- unsaturated amines for example, methylamine, ethylamine, propylamine, isopropylamine, butylamine, isobutylamine, secondary butylamine, tertiary butylamine, amy
- carboxylic acids are preferable because they can be strongly chemically adsorbed on the surface of the inorganic particles.
- the molecular weight of the organic compound (A) is not particularly limited. However, by setting the formula weight of the organic compound chemically adsorbed to the inorganic particles to 3000 or less (for example, 500 or less), dispersion into the resin can be prevented. It will be easier. Therefore, the molecular weight of the organic compound (A) is preferably 3000 or less (for example, 500 or less).
- the oxygen absorption promoter is an additive for promoting oxygen absorption.
- the oxygen absorption promoter promotes the oxidation of the organic compound (A) chemically adsorbed on the inorganic particles, and as a result, oxygen in the atmosphere is consumed. Since the oxygen absorbent of the present invention contains an oxygen absorption promoter, the inorganic particles need not have a photocatalytic function.
- the oxygen absorption promoter for example, at least one selected from the group consisting of an oxidation catalyst (eg, a transition metal salt), a radical generator, and a photocatalyst can be used.
- a transition metal salt can be used as the oxidation catalyst.
- the transition metal constituting the salt include iron, nickel, copper, manganese, conoreto, rhodium, titanium, chromium, vanadium, and ruthenium. Of these, iron, nickel, copper, manganese, and cobalt are preferred.
- the aron constituting the transition metal salt include an aron derived from an organic acid or a salted product.
- Organic acids include, for example, acetic acid, stearic acid, dimethyldithiocarbamic acid, palmitic acid, 2-ethylhexanoic acid, neodecanoic acid, linoleic acid, tallic acid, oleic acid, fatty acid, lactic acid, And naphthenic acid I can get lost.
- Representative transition metal salts include, for example, cobalt 2-ethylhexanoate, cobalt neodecanoate, cobalt naphthenate, and cobalt stearate.
- an ionomer may be used as the transition metal salt.
- radical generator examples include N-hydroxysuccinimide, N-hydroxymaleimide, N, N, dihydroxycyclohexanetetracarboxylic diimide, N-hydroxyphthalimide, N-hydroxy Tetrachlorophthalimide, N-hydroxytetrabromophthalimide, N-hydroxyhexahydrophthalimide, 3-sulfol-N-hydroxyphthalimide, 3-methoxycarboxy-N-hydroxyphthalimide, 3-Methyl-N-hydroxyphthalimide, 3-Hydroxy-N-hydroxyphthalimide, 4-TorN-hydroxyphthalimide, 4-Chloro-N-hydroxyphthalimide, 4-Methoxy-N-hydroxyphthalimide, 4- Dimethylamino-N-hydroxyphthalimide, 4 Carboxy-N-hydroxyhexahydrophthalimide, 4-methyl-N-hydroxyhexahydrophthalimide, N-hydroxyhettimide, N-hydroxyhymic imide, N-hydroxytrimellitic imide, N, N-
- N-hydroxysuccinimide, N-hydroxymaleimide, N-hydroxyhexahydrophthalimide, N, N, dihydroxycyclohexanetetracarboxylic diimide, N-hydroxyphthalimide, N-hydroxyphthalimide —Hydroxytetrabromophthalimide and N-hydroxytetralalophthalimide are particularly preferred.
- Examples of the photocatalyst include titanium dioxide, tungsten oxide, zinc oxide, cerium oxide, strontium titanate, and potassium niobate. These are usually used in the form of a powder.
- titanium dioxide is preferred because it is recognized as a food additive having a high photocatalytic function and is safe and inexpensive. It is preferable that the titanium dioxide is an anatase type. Preferably, 30% by weight or more (more preferably 50% by weight or more) of the titanium dioxide powder is anatase type titanium dioxide. By using an anatase-type titanium dioxide, a high photocatalytic action can be obtained.
- the oxygen absorption promoter may be simply mixed with the inorganic particles, or may be adsorbed to the inorganic particles. Further, the inorganic particles and the oxygen absorption promoter may be dispersed in a dispersion medium such as resin. [0057] In the oxygen absorbent of the first embodiment, it is important that the organic compound (A) chemically adsorbs (chemically bonds) to the surface of the inorganic particles. Such chemisorption can be realized, for example, by the method of Embodiment 2.
- the oxygen absorbent of the present invention can be used in the form of a powder, it is easy to uniformly disperse it in resin. Therefore, a uniform oxygen-absorbing composition can be easily obtained. Further, in the oxygen absorbent of the present invention, since the organic compound (A) is chemically adsorbed on the surface of the inorganic particles, the following is compared with the conventional oxygen absorbent in which the organic compound is not chemically adsorbed on the inorganic particles. The effect is obtained. (1) Oxygen absorption ability higher than that of physical adsorption can be obtained by chemical adsorption. (2) Unlike the case of physical adsorption, bleed-out hardly occurs. (3) The organic compound (A) can be prevented from volatilizing from the vent when blended with the fat.
- Embodiment 2 describes a method of the present invention for producing an oxygen absorbent. Note that the oxygen absorbent produced by the method of Embodiment 2 is one of the oxygen absorbents of the present invention.
- the production method of the present invention includes a step of chemically adsorbing an unsaturated organic compound to inorganic particles.
- the organic compound (A) and the inorganic particles described in Embodiment 1 can be applied to the unsaturated organic compound and the inorganic particles.
- the inorganic particles are usually used in the form of a powder, which is an aggregate of the inorganic particles.
- a mixture of the organic compound (A), the inorganic particles, and the organic solvent is prepared (step la).
- the organic solvent may be any as long as it can uniformly disperse or dissolve the organic compound and the inorganic particles.
- Such organic solvents include, for example, toluene, xylene , Diisopropyl ether, tetrahydrofuran (THF), methylene chloride, chloroform, methyl acetate, ethyl acetate and the like.
- THF tetrahydrofuran
- hexane and toluene are preferable because water generated when the organic compound (A) reacts with the hydroxyl group on the surface of the inorganic particles can be removed by azeotropic dehydration.
- the organic solvent is removed from the mixture (Step 2a).
- the method for removing the organic solvent is not particularly limited, and for example, at least one of filtration, drying under reduced pressure, and heating can be applied.
- a part of the organic compound (A) can be chemically adsorbed to the inorganic particles in the step 2a in some cases.
- step lb a mixture containing the organic compound (A) and the inorganic particles is prepared.
- step 2b the organic compound (A) is chemically adsorbed to the inorganic particles by heating the mixture.
- step 2a and step 2b it is particularly preferable to remove water generated by the reaction between the functional group and the hydroxyl group.
- the reaction between the functional group of the organic compound and the hydroxyl group on the surface of the inorganic particles can be promoted, and the ratio of the chemically adsorbed organic compound (A) can be increased. Therefore, when the heating is performed in Step 2a and Step 2b, it is preferable to perform the heating in an atmosphere from which water is easily removed, such as under a nitrogen atmosphere such as a nitrogen stream or under reduced pressure.
- step 2a and step 2b preferably include heating the mixture at a temperature above the boiling point of water.
- the heating is preferably performed at a temperature lower than the decomposition temperature of the organic compound (A).
- the organic solvent and water may be removed separately or simultaneously.
- the mixture from which the organic solvent has been removed may be heated at a temperature equal to or higher than the boiling point of water.
- inorganic particles to which the organic compound (A) is chemically adsorbed (chemically bonded) can be obtained.
- the oxygen absorption promoter described in the first embodiment may be adsorbed on the inorganic particles together with the organic compound (A) during the above step, or may be adsorbed on the inorganic particles after the above step.
- the inorganic particles obtained in the above step and the oxygen absorbent may be dry-blended.
- the inorganic particles and the oxygen absorbent obtained in the above step are separated from each other by a resin or the like. It may be dispersed in a dispersion medium.
- the oxygen absorbent described in the first embodiment is obtained.
- the oxygen absorbers of Embodiments 1 and 2 may be used alone or may be used by dispersing them in a resin or the like.
- Embodiment 3 describes the oxygen-absorbing composition of the present invention.
- the oxygen-absorbing composition of the third embodiment contains a resin (a polymer compound) and an oxygen absorbent dispersed in the resin.
- the oxygen absorbent is the oxygen absorbent described in the first or second embodiment.
- the amount of the oxygen absorbent contained in the composition of Embodiment 3 is not particularly limited, and is adjusted according to the purpose.
- the amount of the oxygen absorbent per 100 parts by weight of the resin is, for example, in the range of 1 part by weight to 30 parts by weight, and preferably in the range of 1 part by weight to 10 parts by weight.
- the resin is selected according to the use of the composition.
- Representative resins include, for example, synthetic resins such as polybutyl alcohol-based resins, polyamide-based resins, and polyacrylonitrile-based resins. Since these resins have high oxygen nobility, a composition suitable for a packaging material of an article in which deterioration by oxygen is a problem can be obtained.
- polyolefin such as polyethylene, polypropylene, poly 4-methyl-1 pentene, and poly 1-butene
- polyethylene propylene copolymer polyvinyl chloride, polyvinylidene, polyvinyl chloride, polystyrene, polycarbonate, or polyatalylate
- polyesters such as polyethylene terephthalate, polybutylene terephthalate and polyethylene naphthalate may be used.
- a copolymer of ethylene or propylene with another monomer may be used.
- ⁇ -olefins such as 1-butene, isobutene, 4-methyl-1-pentene, 1-hexene, and 1-octene
- itaconic acid methacrylic acid, acrylic acid, and maleic anhydride.
- Polyvinyl alcohol-based resin is obtained by using a homopolymer of bullet ester or a copolymer of bullet ester and another monomer (particularly, a copolymer of vinyl ester and ethylene) with an alkali catalyst or the like. And obtained by performing ken-dani using Examples of the vinyl ester include, for example, butyl acetate. Other fatty acid butyl esters (vinyl propionate, burival vivalate, etc.) may be used.
- the saponification degree of the butyl ester component of the polybutyl alcohol-based resin is preferably at least 90 mol%, for example, at least 95 mol%.
- the degree of Kendy can be determined by a nuclear magnetic resonance (NMR) method.
- melt flow rate (MFR) of the polybutyl alcohol-based resin 210 ° C, under a load of 2160 g, JIS K7210 [based on this]) 0.1 0.1 lOOg / 10 minutes, more preferred 0.5 to 50 g / 10 min, more preferably 1 to 30 g ZlO. If the melt flow rate is out of the range of 0.1 lg-100g / 10 minutes, the workability during melt molding often deteriorates.
- ethylene butyl alcohol copolymer is characterized in that it can be melt-molded and has good gas nori properties under high humidity.
- Ratio of ethylene units to total structural units of EVOH for example 5 to 60 mole 0/0 (preferably 10 55 mole 0/0) is in the range of.
- By 5 mol 0/0 or more and to Rukoto the proportion of ethylene units it is possible to suppress the deterioration of Gasuno barrier properties under high humidity.
- the ratio of ethylene units can be determined by nuclear magnetic resonance (NMR). Note that a mixture of two or more types of EVOH having different ratios of ethylene units may be used.
- EVOH may contain a small amount of another monomer as a copolymer component, as long as the effects of the present invention can be obtained.
- a monomer include ⁇ -olefins such as propylene, 1-butene, isobutene, 4-methyl-1-pentene, 1-hexene, and 1-otene; itaconic acid, methacrylic acid, acrylic acid, and maleic anhydride.
- Unsaturated carboxylic acids such as acids and their Derivatives
- Burrsilane-based compounds such as Burrtrimethoxysilane, Burrtriethoxysilane, Burr (e-methoxy-ethoxy) silane, ⁇ -methacryloxypropyltrimethoxysilane; Unsaturated sulfonic acids or salts thereof; Alkylthiols Burpyrrolidones;
- EVOH contains 0.0002 to 0.2 mol% of the silane compound as a copolymer component, it is easy to produce a homogeneous molded product when molding is performed by coextrusion molding or coinjection molding.
- the silane compound vinyltrimethoxysilane and butyltriethoxysilane are preferably used.
- a boron compound may be added to EVOH. This facilitates production of a homogeneous molded product when molding is performed by co-extrusion molding or co-injection molding.
- the boron compound include boric acids (for example, orthoboric acid), borate esters, borate salts, and borohydrides.
- an alkali metal salt eg, sodium acetate, potassium acetate, sodium phosphate
- a phosphoric acid conjugate eg, sodium dihydrogen phosphate, potassium dihydrogen phosphate, disodium hydrogen phosphate, and dihydrogen hydrogen phosphate
- EVOH to which a boron compound, an alkali metal salt, and a phosphorus compound are added, and an ivy additive can be produced by a known method.
- the type of the polyamide resin is not particularly limited.
- polycaprolamide (nylon 6), polydecaneamide (nylon 11), polylauryl ratatam (nylon 12), polyhexamethylene adipa Aliphatic polyamide homopolymers such as amide (nylon 6, 6) and polyhexamethylene sebacamide (nylon 6, 12); Kyprolonatam Z-lau mouth lactam copolymer Kylon — 6Z12), Kyokuprolatatam Z aminoundecane Acid copolymer (nylon 6Z11), Proproratam ⁇ Aminononanoic acid copolymer (Nylon 6Z9), Proproratam ⁇ hexamethylene azinamide copolymer (nylon 6 ⁇ 6, 6), Proproratatam ⁇ hexamethylene adipamide ⁇ Aliphatic polyamide copolymers such as hexamethylene sebacamide copolymer (nylon 6-6, 6/6, 10); polymethaxylylene a
- polyacrylonitrile-based resin examples include a homopolymer of acrylonitrile and a copolymer of acrylonitrile with a monomer such as acrylate ester.
- the composition of Embodiment 3 includes an antioxidant, a plasticizer, a heat stabilizer (melt stabilizer), a photoinitiator, a deodorant, an ultraviolet absorber, an antistatic agent, as long as the effects of the present invention can be obtained. May include at least one of additives such as agents, lubricants, colorants, fillers, fillers, pigments, dyes, processing aids, flame retardants, anti-fog agents, and desiccants.
- additives such as agents, lubricants, colorants, fillers, fillers, pigments, dyes, processing aids, flame retardants, anti-fog agents, and desiccants.
- melt stabilizer for example, one or two or more of a talcite-containing hydrated product and a metal salt of a higher aliphatic carboxylic acid (for example, calcium stearate / magnesium stearate) are used. be able to. By using these compounds, it is possible to prevent the occurrence of gels and fish eyes during the production of the composition.
- a talcite-containing hydrated product and a metal salt of a higher aliphatic carboxylic acid for example, calcium stearate / magnesium stearate
- Examples of the deodorant include zinc compounds, aluminum compounds, silicon compounds, iron (II) compounds, and organic acids.
- the composition of the present invention can be formed by mixing components such as an oxygen absorbent (that is, inorganic particles having an organic compound adsorbed thereon and an oxygen absorption promoter), a resin, and an additive.
- the method of mixing the components and the order of mixing are not particularly limited. For example, all components may be mixed simultaneously.
- the oxygen absorbent and the additive may be mixed with the resin after mixing, or the oxygen absorbent and the resin may be mixed with each other before mixing with the additive. Further, the additive and the resin may be mixed and then mixed with the oxygen absorbent.
- the inorganic particles having the organic compound adsorbed thereon and the oxygen absorption promoter may be mixed in advance, or may be separately mixed with other components at different stages.
- Specific mixing methods include, for example, dissolving each component in a solvent to prepare a plurality of solutions, mixing these solutions and evaporating the solvent, or adding another solution to the molten resin. There is a method of adding and kneading the components.
- the kneading can be performed using, for example, a ribbon blender, a high-speed mixer, a co-kneader, a mixing roll, an extruder, or an intensive mixer.
- the composition of the present invention can be formed into various forms, for example, films, sheets, containers and the like. These molded products can be used as packaging materials and oxygen scavengers.
- the composition of the present invention may be molded as pellets and may be directly molded by dry blending the components of the composition.
- Embodiment 4 describes a packaging material of the present invention.
- the packaging material of the present invention includes the oxygen-absorbing composition described in the third embodiment. This part may be of any shape, for example a layer, a bottle, or a cap.
- This packaging material can be formed by processing the composition of Embodiment 3 into various shapes.
- the composition of Embodiment 3 may be formed into a shape such as a film, a sheet, and a pipe by, for example, a melt extrusion molding method. Further, it may be formed into a container shape by an injection molding method. Further, the hollow container may be formed into a hollow container such as a bottle by a hollow molding method. As the hollow molding, for example, extrusion hollow molding or injection hollow molding can be applied.
- the packaging material of Embodiment 4 may be composed of only the layer made of the composition of Embodiment 3 (hereinafter, may be referred to as layer (A)), but may be made of a layer made of another material ( Hereinafter, it may be referred to as a layer (B)).
- layer (A) the layer made of the composition of Embodiment 3
- B a layer made of another material
- properties such as mechanical properties, water vapor barrier properties, and oxygen noria properties can be further improved.
- the material and number of layers (B) are selected according to the properties required for the packaging.
- the structure of the laminate is not particularly limited. Between the layer (A) and the layer (B), an adhesive resin layer (hereinafter, sometimes referred to as a layer (C)) for bonding the two may be arranged.
- the configuration of the laminate is, for example, layer (A) Z layer (B), layer (B) Z layer (A) Z layer (B), layer (A) Z layer (C) Z layer (B), layer ( B) Z layer (C) Z layer (A) Z layer (C) Z layer (B), layer (B) Z layer (A) Z layer (B) Z layer (A) Z layer (B), and layer (B) Z layer (C) Z layer (A) Z layer (C) Z layer (B) Z layer (C) Z layer (A) Z layer (C) / layer (B).
- the laminate When the laminate includes a plurality of layers (B), they may be the same or different.
- the thickness of each layer of the laminate is not particularly limited. By setting the ratio of the thickness of the layer (A) to the total thickness of the laminate in the range of 2 to 20%, it may be advantageous in terms of moldability and cost.
- the layer (B) can be formed of, for example, a thermoplastic resin or metal.
- Metal used for layer (B) examples thereof include steel and aluminum.
- the thermoplastic resin used for the layer (B) is not particularly limited.
- the resin exemplified for the layer (A) can be used.
- polyolefins such as polyethylene, polypropylene, poly 4-methyl-1 pentene, and poly 1-butene may be used.
- an ethylene propylene copolymer, a polychloride bilidene, a polychlorinated vinyl, a polystyrene, a polyacrylonitrile, a polycarbonate, a polyatalylate, and an ethylene vinyl alcohol copolymer may be used.
- polyesters such as polyethylene terephthalate, polybutylene terephthalate, and polyethylene naphthalate may be used.
- polyamides such as polycaprolamide, polyhexamethylene adipamide, and polymethaxylylene adipamide may be used.
- a copolymer of ethylene or propylene and another monomer may be used.
- Other monomers include, for example, ⁇ -olefins such as 1-butene, isobutene, 4-methyl-1-pentene, 1-hexene, and 1-octene; unsaturated powers such as itaconic acid, methacrylic acid, acrylic acid, and maleic anhydride.
- Acid its salt, its partial or complete ester, its tolyl, its amide, and its anhydrous form
- bur formate bur acetate, bur propionate, burptylate, buroktanoate, burddecanoate, vinyl stearate
- buronic acid butyl esters such as arachidonate
- bursilane compounds such as burtrimethoxysilane
- unsaturated sulfonic acids or salts thereof alkylthiols
- butylpyrrolidones butylpyrrolidones.
- the layer ( ⁇ ) and the layer ( ⁇ ) may be unstretched, or may be uniaxially or biaxially stretched or rolled! /.
- the adhesive resin used for the layer (C) is not particularly limited as long as it can bond the respective layers.
- polyurethane-based or polyester-based one-pack or two-pack curable adhesives, copolymers or graft-modified unsaturated carboxylic acids or their anhydrides (such as maleic anhydride) to olefin-based polymers (carboxylic acid-modified) Polyolefin resin) can be used.
- the layer ( ⁇ ) and the layer ( ⁇ ) contain a polyolefin resin, high adhesiveness can be realized by using a carboxylic acid-modified polyolefin resin.
- carboxylic acid-modified polyolefin resin examples include polyethylene, polypropylene, copolymerized polypropylene, ethylene-butyl acetate copolymer, and ethylene (meth) acrylate ester. And a resin obtained by modifying a polymer such as a copolymer with a carboxylic acid.
- a deodorant may be added to at least one of the layers constituting the laminate.
- the deodorant for example, the deodorant exemplified in Embodiment 3 can be used.
- the method for producing the laminate of Embodiment 4 is not particularly limited, and can be formed, for example, by a known method.
- methods such as extrusion lamination, dry lamination, solvent casting, co-injection molding, and co-extrusion molding can be applied.
- coextrusion molding method for example, a coextrusion laminating method, a coextrusion sheet molding method, a coextrusion inflation molding method, and a coextrusion blow molding method can be applied.
- the layer of the composition according to Embodiment 3 is disposed on a layer close to the inner surface of the container, for example, the innermost layer, so that the acid in the container is reduced. Element can be quickly absorbed.
- the present invention is suitably used for a multilayer container having a total thickness of 300 m or less, or a multilayer container manufactured by an extrusion blow molding method.
- a multilayer container having a total thickness of 300 m or less is a container having a relatively thin multilayer structure such as a multilayer film, and is usually used in the form of a voucher or the like. Since it is flexible, easy to manufacture, has excellent gas barrier properties, and has a continuous oxygen absorption function, it is extremely useful for packaging products that are sensitive to oxygen and easily deteriorate.
- the total thickness is set to 300 m or less, high flexibility can be obtained. Higher flexibility can be obtained by making the thickness of all layers 250 ⁇ m or less, especially 200 ⁇ m or less. In consideration of mechanical strength, the total thickness is more preferably 10 ⁇ m or more, more preferably 20 ⁇ m or more.
- At least one surface layer of the multilayer film is preferably a layer made of a heat-sealable resin.
- a resin include polyolefins such as polyethylene and polypropylene.
- the multilayer container manufactured by the extrusion blow molding method is usually used in the form of a bottle or the like.
- High productivity, excellent gas barrier properties, and continuous oxygen absorber It is extremely useful for packaging products that are sensitive to oxygen and easily deteriorate.
- the thickness of the body of a bottle-shaped container is generally in the range of 100 to 2000 ⁇ m, and is selected according to the application.
- the thickness of the layer composed of the composition of the second embodiment can be, for example, in the range of 211 to 200 ⁇ m.
- the packaging material of the present invention may be a packing (gasket) for a container, particularly a gasket for a cap of a container.
- a gasket is formed by the composition of the third embodiment.
- Example 1 shows the results of evaluating the oxygen absorbing ability of the oxygen absorbent of the present invention.
- Kyowado-500 manufactured by Kyowa Chemical Industry Co., Ltd. was used as the powder of talcite at the mouth.
- Linoleic acid (4.00 g) was dissolved in degassed hexane (150 mL), and talcite powder (16 Og) was dried.
- the hexane was distilled off under a nitrogen atmosphere at a bath temperature of 80 ° C.
- the powder was heated at 110 ° C. in a nitrogen atmosphere for 3 hours while stirring the powder.
- the powder was dried under reduced pressure to obtain a powder of talcite at a hydrated mouth with linolenic acid chemically adsorbed thereon (sample 1).
- Linolenic acid (2.00 g) was dissolved in hexane (100 mL), and hydrite talcite powder (8.00 g) was added, followed by stirring at room temperature for 2 hours. The liquid after mixing was subjected to suction filtration, and the obtained powder was dried under reduced pressure. In this way, a powder of talcite, which had adsorbed linolenic acid, was obtained (sample 3).
- the ordinate of FIG. 1 indicates the amount of oxygen absorbed per oxygen absorbent lg.
- Sample 13 exhibited higher oxygen absorption capacity than Comparative Sample 1 in which linolenic acid was physically adsorbed on activated carbon.
- Sample 3 was inferior to Samples 1 and 2 in oxygen absorption capacity.
- Sample 2 obtained by washing Sample 1 produced by heat treatment no significant deterioration was observed in comparison with Sample 1.
- the reason why the decrease in oxygen absorption capacity of Sample 2 due to washing is small is considered to be that a large amount of linolenic acid is chemically adsorbed on the hydrated talcite of Sample 1.
- Comparative Sample 2 showed almost no oxygen absorption.
- Example 2 describes another example in which the oxygen absorbent of the present invention was produced and evaluated.
- Example 3 describes another example in which the oxygen absorbent of the present invention was produced and evaluated.
- Linolenic acid 4.Dissolve OOg in degassed hexane 150mL, add synthetic mica powder Somasif ME (manufactured by Corp Chemical Co., Ltd.) 16.Add Og and hexane at 80 ° C bath temperature under nitrogen atmosphere. Was distilled off. Next, the powder obtained by distilling off hexane was heated for 3 hours while stirring at a nitrogen temperature of 110 ° C under a nitrogen atmosphere. Next, the powder was dried under reduced pressure to obtain a powder of Somasif ME to which linolenic acid was chemically adsorbed (sample 5).
- Example 4 describes another example of producing and evaluating the oxygen absorbent of the present invention.
- Eicosapentaenoic acid ethyl ester (4.00 g) was dissolved in degassed hexane (150 mL). Hydrate talcite powder (16 Og) was added, and the hexane was distilled off under a nitrogen atmosphere at a bath temperature of 80 ° C. Next, the powder obtained by distillation of hexane was heated under a nitrogen atmosphere at a bath temperature of 110 ° C. for 3 hours while stirring. Next, the powder was dried under reduced pressure to obtain a powder of a hydrated talcite to which eicosapentaenoic acid was chemically adsorbed (sample 6).
- Example 5 describes an example in which a press film made of an oxygen-absorbing composition was produced.
- Example 1 a powder (sample 1) of hydrated talcite to which linolenic acid was chemically adsorbed as described in Example 1 was produced. About 10 times the weight of degassed hexane was added to Sample 1, and cobalt naphthenate was added to 800 ppm in terms of cobalt and mixed. The solvent was distilled off from the liquid after mixing under reduced pressure, and the obtained powder was dried to obtain an oxygen absorbent. Next, 10 parts by weight of the oxygen absorbent thus obtained and 90 parts by weight of EVOH were mixed and melt-blended for 5 minutes. The blending was performed under a nitrogen atmosphere. And got The mixture was pressed with a compression molding machine to a thickness of about 100 / zm to produce a pressed film (Sample 7).
- the present invention can be applied to oxygen absorbers, oxygen-absorbing compositions, and packaging materials using them.
- it is suitably used as an article which is greatly affected by deterioration due to oxygen, for example, as a packaging material for food, medicine, medical equipment, machine parts, clothing and the like.
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Abstract
Description
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Cited By (3)
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WO2007040168A1 (ja) * | 2005-10-05 | 2007-04-12 | Kuraray Co., Ltd. | 酸素吸収剤、酸素吸収性組成物およびそれらの製造方法、ならびに当該酸素吸収性組成物を用いた積層体および包装材 |
WO2007040060A1 (ja) * | 2005-09-30 | 2007-04-12 | Kuraray Co., Ltd. | 酸素吸収性組成物およびそれを用いた容器 |
CN112545900A (zh) * | 2019-09-26 | 2021-03-26 | 株式会社松风 | 配合过渡金属吸附体的牙科用固化性组合物 |
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US11396486B2 (en) * | 2018-04-19 | 2022-07-26 | Kuraray Co., Ltd. | Compound containing unsaturated double bond, oxygen absorbent using same and resin composition |
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JP2961231B1 (ja) * | 1998-09-07 | 1999-10-12 | 工業技術院長 | 脱酸素剤の製造方法 |
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2005
- 2005-02-16 JP JP2006510210A patent/JP4926697B2/ja not_active Expired - Fee Related
- 2005-02-16 WO PCT/JP2005/002333 patent/WO2005079607A1/ja active Application Filing
- 2005-02-18 TW TW94104787A patent/TW200536488A/zh unknown
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JPH01202446A (ja) * | 1988-02-08 | 1989-08-15 | Mitsubishi Kasei Vinyl Co | 農業用積層フィルム |
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JPH05115776A (ja) * | 1991-04-02 | 1993-05-14 | W R Grace & Co | 酸素掃去のための配合物、製品及び方法 |
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JP5405021B2 (ja) * | 2005-09-30 | 2014-02-05 | 株式会社クラレ | 酸素吸収性組成物およびそれを用いた容器 |
WO2007040168A1 (ja) * | 2005-10-05 | 2007-04-12 | Kuraray Co., Ltd. | 酸素吸収剤、酸素吸収性組成物およびそれらの製造方法、ならびに当該酸素吸収性組成物を用いた積層体および包装材 |
CN112545900A (zh) * | 2019-09-26 | 2021-03-26 | 株式会社松风 | 配合过渡金属吸附体的牙科用固化性组合物 |
US20210189098A1 (en) * | 2019-09-26 | 2021-06-24 | Shofu Inc. | Curable composition containing transition metal adsorbent |
US11767411B2 (en) * | 2019-09-26 | 2023-09-26 | Shofu Inc. | Curable composition containing transition metal adsorbent |
CN112545900B (zh) * | 2019-09-26 | 2024-02-13 | 株式会社松风 | 配合过渡金属吸附体的牙科用固化性组合物 |
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JP4926697B2 (ja) | 2012-05-09 |
TW200536488A (en) | 2005-11-16 |
JPWO2005079607A1 (ja) | 2007-10-25 |
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