WO2010090331A1 - 金属超微粒子含有樹脂組成物の製造方法 - Google Patents
金属超微粒子含有樹脂組成物の製造方法 Download PDFInfo
- Publication number
- WO2010090331A1 WO2010090331A1 PCT/JP2010/051887 JP2010051887W WO2010090331A1 WO 2010090331 A1 WO2010090331 A1 WO 2010090331A1 JP 2010051887 W JP2010051887 W JP 2010051887W WO 2010090331 A1 WO2010090331 A1 WO 2010090331A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fatty acid
- resin composition
- ultrafine
- metal salt
- ultrafine metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/201—Pre-melted polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/09—Carboxylic acids; Metal salts thereof; Anhydrides thereof
- C08K5/098—Metal salts of carboxylic acids
Definitions
- the present invention relates to a method for producing a resin composition containing ultrafine metal particles, and more specifically, an ultrafine metal particle-containing resin composition capable of suppressing aggregation of ultrafine metal particles and exhibiting excellent adsorption performance. It relates to a manufacturable method.
- fatty acid metal salts have been widely used in many fields such as electronic printing, powder metallurgy, cosmetics, paints, and resin processing.
- magnesium salts and calcium salts of fatty acids are used in cosmetics.
- it is used for the purpose of improving the lubricity and adhesion to the skin
- resin processing field it is used for the purpose of improving the dispersibility of the pigment.
- fatty acid silver salts have been conventionally used as photothermographic and medical heat-developable image recording materials.
- the average particle diameter is 1 to 100 nm. The use as a precursor for obtaining ultrafine metal particles is disclosed.
- Patent Document 1 an average of silver and gold whose surfaces are protected by fatty acids by thermally decomposing organometallic compounds such as fatty acid silver and fatty acid gold salt by solid phase reaction in an inert gas atmosphere. Ultrafine metal particles with a particle size of 1 to 100 nm are synthesized.
- Patent Document 2 a mixture of a fatty acid silver or gold salt and a resin is heat-molded at a temperature not lower than the thermal decomposition start temperature of the fatty acid metal salt and lower than the deterioration temperature of the resin to obtain an average particle size of 1 to 100 nm.
- the ultrafine metal particles are produced in a resin molded product.
- these metallic ultra particles exhibit unique properties different from the bulk, they are applied to inkjet materials, recording materials, catalysts, etc., materials for electronic devices such as conductive pastes, and coloring materials using plasmon absorption. Applications are being studied in various fields such as the use of In addition, resin molded products in which these ultrafine metal particles are stably dispersed have been widely studied such as conductive materials, magnetic materials, and electromagnetic wave absorbing materials.
- a resin compound containing ultrafine metal particles whose surface is modified with an organic acid produced by the method described in Patent Document 2, for example, by the present applicant is a malodorous component such as methyl mercaptan, or a volatile organic compound such as formaldehyde ( Volatile Organic Compounds (hereinafter referred to as “VOC”) have been shown to have adsorption performance, and have antibacterial properties and properties to inactivate microproteins such as allergenic substances (Patent Documents 3 and 4) .
- VOC Volatile Organic Compounds
- metal ultrafine particles As described above, the application of metal ultrafine particles in various fields has been studied.
- a production method for obtaining such metal ultrafine particles a vapor of metal evaporated at a high temperature in a gas phase is supplied.
- the vapor phase method in which fine particles are formed by rapid cooling by collision with gas molecules, and the liquid phase method in which a reducing agent is added to a solution containing metal ions to reduce metal ions are generally used.
- a resin compound containing ultrafine metal particles having a narrow particle size distribution and excellent dispersion stability can be obtained by a very simple and general method. This is a highly productive manufacturing method.
- an object of the present invention is to provide a method for producing a resin composition containing metal ultrafine particles in which the metal ultrafine particles are efficiently dispersed uniformly without aggregation of the metal ultrafine particles in the resin.
- Another object of the present invention is to effectively exhibit excellent properties such as adsorptivity of the resin composition containing ultrafine metal particles, and to improve the manufacturing or working environment by suppressing smoke generated by decomposition.
- An object of the present invention is to provide a method for producing a resin composition containing ultrafine metal particles that can be produced.
- the fatty acid metal salt in the method for producing a resin composition containing ultrafine metal particles, in which ultrafine metal particles are produced and dispersed in a thermoplastic resin by mixing and heating the fatty acid metal salt and the thermoplastic resin, the fatty acid metal salt
- a method for producing a resin composition containing ultrafine metal particles characterized in that mixing and heating of a thermoplastic resin and a thermoplastic resin are performed at a temperature lower than the decomposition start temperature of the fatty acid metal salt.
- the metal component of the fatty acid metal salt compounded in the thermoplastic resin is silver, and the fatty acid present in the produced resin composition and the thermoplastic resin It is preferable that the molar ratio of the fatty acid silver blended in is in the range of 0.4 to 1.0.
- the metal composition containing a metal ultrafine particle manufactured by the said manufacturing method is provided.
- the fatty acid metal salt and the thermoplastic resin are mixed and heated at a temperature lower than the decomposition start temperature of the fatty acid metal salt, and the fatty acid metal salt is contained in the resin composition. It is an important feature to leave a part of In this way, by partially leaving the fatty acid metal salt in the resin composition containing ultrafine metal particles, the resulting ultrafine metal particle-containing resin composition has the ultrafine metal particles such as adsorptive and microprotein inactivation effects. Excellent performance is effectively expressed. That is, when heated above the thermal decomposition start temperature of the fatty acid metal salt, substantially the entire amount of the fatty acid metal salt blended is reduced to metal. Under such heating and mixing conditions, as described above, the ultrafine metal particles are likely to aggregate, and the detached fatty acid volatilizes outside the resin composition, resulting in fuming that is undesirable in the working environment.
- part of the fatty acid metal salt remains in the resin composition without being reduced to metal by heating and mixing at a temperature lower than the decomposition start temperature of the fatty acid metal salt. To do. Under such heating conditions, the remaining fatty acid metal salt suppresses the aggregation of the ultrafine metal particles, so that the aggregation is difficult to proceed. As a result, as described later, the ultrafine metal particles such as adsorptivity and microprotein inactivation effect It is possible to effectively exhibit the superior performance of the.
- the metal component of the fatty acid metal salt is silver
- the molar ratio of fatty acid / mixed fatty acid silver in the ultrafine metal particle-containing resin composition obtained by the production method of the present invention is 0.4 to 1. It is preferable to set it to 0 because the progress of particle aggregation can be suppressed.
- the ultrafine metal particle-containing resin composition in which the fatty acid metal salt remains obtained by the production method of the present invention has superior performance as compared to the ultrafine metal particle-containing resin composition in which the fatty acid metal salt does not remain. It is clear from the results of the working examples. That is, in the examples to be described later, a film is formed from a resin composition containing ultrafine metal particles produced under the same conditions except that the heating temperature and the residence time in the twin screw extruder are different, and the absorbance of this film is measured spectrophotometrically. It was measured with a total (manufactured by Shimadzu Corporation).
- ultrafine particles of silver or copper exhibit a color caused by plasmon absorption caused by free electrons undergoing vibration due to an optical magnetic field.
- This absorption wavelength is specific to the type of metal, and in the case of silver ultrafine particles, the absorption is in the vicinity of a wavelength of 420 nm. 1 that the film of Example 4 has absorption due to silver plasmon absorption at around 420 nm, and it can be confirmed that silver ultrafine particles are produced and dispersed in the resin.
- the film obtained by the production method of the present invention has a higher absorbance near 420 nm, and it can be seen that the silver ultrafine particles are uniformly dispersed.
- the production method of the present invention is uniformly dispersed without aggregation of silver ultrafine particles in the composition as compared with the conventional production method, and has excellent adsorption performance for odorous substances such as methyl mercaptan, This indicates that there is no smoke during molding and that the manufacturing environment is excellent.
- an ultrafine metal particle-containing resin in which ultrafine metal particles having an average particle diameter of 1 to 100 nm are uniformly dispersed without aggregation of ultrafine metal particles in the resin.
- a composition can be obtained efficiently.
- the ultrafine metal particle-containing resin composition obtained by the production method of the present invention can effectively adsorb odor components and VOC, can exhibit excellent deodorizing performance or VOC adsorption performance, and It becomes possible to effectively inactivate pollen and mite-derived allergen substances, enzymes, or microproteins such as viruses.
- smoke is not generated as in the conventional method, and the metal ultrafine particle-containing resin composition can be produced without impairing the production or working environment.
- the type of metal in the fatty acid metal salt used in the present invention is at least one selected from the group consisting of Cu, Ag, Au, In, Pd, Pt, Fe, Ni, Co, Zn, Nb, Ru, and Rh.
- Cu, Ag, Co, and Ni are desirable because of their high deodorizing and antibacterial performance.
- a plurality of metals may be included. In this case, it is desirable to use Ag as an essential component and to combine at least one other metal other than Ag.
- the fatty acid in the fatty acid metal salt used in the present invention is a fatty acid having 3 to 30 carbon atoms and may be either saturated or unsaturated.
- Examples of such include caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, oleic acid, linoleic acid, linolenic acid, stearic acid, arachidic acid, and behenic acid. Moreover, multiple fatty acids may be contained.
- thermoplastic resin in the present invention, any conventionally known resin can be used as long as it is a thermoplastic resin that can be melt-molded.
- low-, medium-, high-density polyethylene linear Low density polyethylene, linear ultra low density polyethylene, isotactic polypropylene, syndiotactic polypropylene, propylene-ethylene copolymer, polybutene-1, ethylene-butene-1 copolymer, propylene-butene-1 copolymer, Olefin resin such as ethylene-propylene-butene-1 copolymer, polyester resin such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyamide resin such as nylon 6, nylon 6,6, nylon 6,10, polycarbonate resin, etc.
- thermoplastic resin has various compounding agents known per se, for example, a filler, a plasticizer, a leveling agent, a thickening agent, a thickening agent, a stabilizer, an antioxidant, and an ultraviolet absorber.
- a filler for example, a filler, a plasticizer, a leveling agent, a thickening agent, a thickening agent, a stabilizer, an antioxidant, and an ultraviolet absorber.
- An agent or the like can also be contained in the resin according to a known formulation.
- a fatty acid metal salt and a thermoplastic resin are mixed and heated to produce a metal ultrafine particle-containing resin composition in which ultrafine metal particles are produced and dispersed in a thermoplastic resin. It is important that the mixed heating of the metal salt and the thermoplastic resin is performed at a temperature lower than the decomposition start temperature of the fatty acid metal salt.
- the temperature lower than the decomposition start temperature of the fatty acid metal salt is not particularly limited as long as the fatty acid desorbed from the ultrafine metal particles and the fatty acid metal salt is present in the produced resin composition.
- the preparation of a resin composition containing ultrafine metal particles is generally carried out by mixing and heating a fatty acid metal salt and a thermoplastic resin as raw materials in a twin-screw extruder.
- a temperature equal to or higher than the decomposition start temperature of the fatty acid metal salt it is necessary to heat at a temperature equal to or higher than the decomposition start temperature of the fatty acid metal salt.
- the decomposition start temperature of the fatty acid metal salt is a temperature at which the fatty acid portion begins to desorb or decompose from the metal portion, and the start temperature is generally defined by JIS K 7120.
- thermogravimetry TG
- the decomposition start temperature is calculated from the thermogravimetric curve (TG curve) obtained by the measurement. It is defined that the temperature at the point where the line parallel to the horizontal axis passing through the mass before the start of test heating and the tangent line at which the gradient between the bending points in the TG curve becomes maximum is the starting temperature.
- the present invention does not require heating at a temperature higher than the decomposition start temperature of the fatty acid metal salt defined above.
- the fatty acid metal salt is decomposed to form ultrafine metal particles by adjusting processing conditions such as residence time, heating time, and screw rotation speed.
- the processing conditions of the fatty acid metal salt cannot be generally limited.
- stearic acid having a decomposition start temperature of 220 ° C. as a fatty acid is used as a fatty acid according to JIS definition, 140 ° C. to 220 ° C.
- the fatty acid metal salt in an amount of 0.001 to 5 parts by weight per 100 parts by weight of the thermoplastic resin.
- the amount is larger than the above range, the ultrafine metal particles are aggregated and uniform dispersion may be difficult, which is not preferable.
- a two-roll method from a molten resin obtained by mixing and heating a thermoplastic resin and a fatty acid metal salt at a temperature lower than the decomposition start temperature of the fatty acid metal salt, a two-roll method, injection molding, extrusion molding, compression molding, etc.
- a resin molded body such as a shape, for example, a granular shape, a pellet shape, a fiber shape, a film, a sheet, or a container can be formed according to the use of the final molded product.
- the resin composition containing a fatty acid metal salt obtained by the present invention can be used alone to form a resin molded article containing ultrafine metal particles, it can also have a multilayer structure in combination with other resins.
- Liquid A was prepared by dissolving 76.6 g of sodium stearate in 3000 g of water at 90 ° C.
- liquid B was prepared by dissolving 40.3 g of silver nitrate in 600 g of water.
- the B liquid was thrown into the A liquid while stirring the A liquid.
- the mixture was stirred for 15 minutes and thoroughly washed with deionized water while performing solid-liquid separation by suction filtration.
- the obtained silver stearate was dried with a hot air dryer (manufactured by Tabai Espec).
- Example 2 A film was prepared in the same manner as in Example 1 except that the extruder set temperature was 180 ° C., confirmation of plasmon absorption, confirmation of fuming and analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 3 A film was prepared in the same manner as in Example 1 except that the extruder set temperature was 190 ° C., confirmation of plasmon absorption, confirmation of smoke generation, analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 4 A film was produced in the same manner as in Example 1 except that the temperature set for the extruder was 200 ° C., confirmation of plasmon absorption, confirmation of smoke generation, analysis of volatiles, measurement of the amount of methyl mercaptan, amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 5 A film was prepared in the same manner as in Example 1 except that the extruder set temperature was 210 ° C., confirmation of plasmon absorption, confirmation of smoke generation, analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 9 A film was prepared in the same manner as in Example 1 except that silver myristate was changed to 0.5 wt% and the extruder was set at 180 ° C., confirmation of plasmon absorption, confirmation of fuming and analysis of volatiles, methyl mercaptan The amount was measured and the amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 10 A film was prepared in the same manner as in Example 1 except that silver behenate was changed to 0.5 wt% and the extruder set temperature was 180 ° C., confirmation of plasmon absorption, confirmation of fuming, analysis of volatiles, methyl mercaptan The amount was measured and the amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 1 A film was prepared in the same manner as in Example 1 except that the extruder set temperature was set to 130 ° C., confirmation of plasmon absorption, confirmation of smoke generation, analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 2 A film was produced in the same manner as in Example 1 except that the temperature set at the extruder was 240 ° C., confirmation of plasmon absorption, confirmation of fuming and analysis of volatiles, measurement of the amount of methyl mercaptan, amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 3 A film was prepared in the same manner as in Example 1 except that the extruder set temperature was set to 260 ° C., confirmation of plasmon absorption, confirmation of smoke generation, analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 4 A film was produced in the same manner as in Example 1 except that the extruder set temperature was 280 ° C., confirmation of plasmon absorption, confirmation of smoke generation and analysis of volatiles, measurement of methyl mercaptan amount, deodorization amount of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 5 A film was prepared in the same manner as in Example 1 except that silver myristate was changed to 0.5 wt% and the extruder set temperature was set to 260 ° C., confirmation of plasmon absorption, confirmation of fuming and analysis of volatiles, methyl mercaptan The amount was measured and the amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- Example 6 A film was prepared in the same manner as in Example 1 except that silver behenate was changed to 0.5 wt% and the extruder set temperature was set to 260 ° C., confirmation of plasmon absorption, confirmation of fuming, analysis of volatiles, methyl mercaptan The amount was measured and the amount of deodorization of methyl mercaptan was calculated. The results are shown in Table 1.
- the method for producing a resin composition containing ultrafine metal particles according to the present invention is capable of producing an ultrafine metal particle-containing resin composition in which ultrafine metal particles are efficiently dispersed without aggregation of ultrafine metal particles in the resin.
- the ultrafine metal particle-containing resin composition having excellent properties such as adsorptivity can be efficiently produced in various forms such as granular, pellet-like, fibrous, film, sheet, and container. It can be used in the industrial field.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
Description
一方、脂肪酸の銀塩は従来、写真製版や医療用途の熱現像画像記録材料として使用されてきたが、最近では、下記特許文献1や2に記載されているように、平均粒径1~100nmの金属超微粒子を得るための前駆体としての用途が開示されている。
また本出願人により、例えば特許文献2記載の手法により製造した、表面が有機酸によって修飾された金属超微粒子を含む樹脂化合物は、メチルメルカプタン等の悪臭成分、或いはホルムアルデヒド等の揮発性有機化合物(Volatile Organic Compounds 以下「VOC」という)の吸着性能を有することや、抗菌性、アレルゲン物質などの微小蛋白質を不活性化する性質を有することが明らかにされている(特許文献3及び特許文献4)。
更に、金属含有有機化合物の分解開始温度以上で加熱を行うと、金属含有有機化合物の分解により脱離した脂肪酸が揮発して煙を発生するという問題もある。
また本発明の他の目的は、金属超微粒子含有樹脂組成物が有する吸着性等の優れた特性を効果的に発現可能であり、分解により発生する煙を抑制することにより製造または作業環境を改善することが可能である金属超微粒子含有樹脂組成物の製造方法を提供することである。
本発明の金属超微粒子含有樹脂組成物の製造方法においては、金属超微粒子含有樹脂組成物が、プラズモン吸収を有することが重要な特徴であり、前記脂肪酸金属塩を熱可塑性樹脂100重量部当たり0.001乃至5重量部の量で配合すること、及び熱可塑性樹脂中に配合した脂肪酸金属塩の金属成分が銀であって、製造された樹脂組成物中に存在する脂肪酸と、熱可塑性樹脂中に配合した脂肪酸銀のモル比が0.4~1.0の範囲にあること、が好適である。
また本発明によれば、上記製造方法により製造された金属超微粒子含有樹脂組成物が提供される。
すなわち、脂肪酸金属塩の熱分解開始温度以上で加熱した場合、配合した前記脂肪酸金属塩の実質的にほぼ全量が金属に還元する。このような加熱混合条件においては、上述した通り、金属超微粒子が凝集しやすく、且つ脱離した脂肪酸は樹脂組成物外に揮発するので、作業環境上好ましくない発煙を生じる。
すなわち、後述する実施例においては、加熱温度及び二軸押出機中の滞留時間が異なる以外は同じ条件で製造された金属超微粒子含有樹脂組成物からフィルム成形を行い、このフィルムの吸光度を分光光度計(島津製作所製)にて測定した。銀や銅の超微粒子は、自由電子が光磁場による振動を受けて生じるプラズモン吸収に起因する発色を示すことが知られている。この吸収波長は金属の種類に固有のものであり、銀超微粒子の場合には、波長420nm付近に吸収をもっている。
図1より、実施例4のフィルムは420nm付近に銀のプラズモン吸収に起因する吸収をもつことが分かり、銀超微粒子が樹脂中に生成分散されていることが確認できる。また、比較例4のフィルムと比べ、本発明の製造方法により得られたフィルムの方が420nm付近の吸光度が高くなっており、銀超微粒子が均一に分散していることが分かる。
この結果は本発明の製造方法による金属超微粒子含有樹脂組成物から成る成形品中には、特定の粒度分布をもった銀超微粒子が凝集することなく安定分散して生成していることを示すものであり、このような成形品は、メチルメルカプタンなどの臭気物質の吸着性能においても、脂肪酸金属塩の分解開始温度以上の温度で加熱することにより得られた金属超微粒子含有樹脂組成物よりも優れていることが明らかである。
上述した結果から、本発明の製造方法は、従来の製造方法に比べ、銀超微粒子が組成物中に凝集することなく均一に分散しており、メチルメルカプタンなどの臭気物質の吸着性能に優れ、成形時の発煙がなく製造環境に優れていることを示すものである。
また本発明の製造方法により得られる金属超微粒子含有樹脂組成物は、臭気成分、VOCを効果的に吸着することができ、優れた消臭性能或いはVOC吸着性能を発現することができると共に、スギ花粉やダニ由来のアレルゲン物質や酵素、あるいはウィルス等の微小蛋白質を有効に不活性化することが可能となる。
更に、金属超微粒子含有樹脂組成物の生成の際に、従来の方法のように煙が発生することなく、製造または作業環境を損なわずに金属超微粒子含有樹脂組成物を製造することができる。
本発明に用いる脂肪酸金属塩における金属の種類は、Cu、Ag、Au、In、Pd、Pt、Fe、Ni、Co、Zn、Nb、Ru及びRhからなる群より選択される少なくとも1種であり、特にCu、Ag、Co、Niが消臭や抗菌等の性能が高い点から望ましい。また、含まれる金属は複数であってもよく、この場合には、Agを必須成分とし、Ag以外の他の金属を少なくとも1種組み合わせることが望ましい。
また本発明に用いる脂肪酸金属塩における脂肪酸は、炭素数3~30の脂肪酸で、飽和、不飽和のいずれであってもよい。このようなものとしては、例えばカプロン酸、カプリル酸、カプリン酸、ラウリン酸、ミリスチン酸、パルミチン酸、オレイン酸、リノール酸、リノレン酸、ステアリン酸、アラキジン酸、ベヘン酸等を挙げることができる。また、含まれる脂肪酸が複数であってもよい。
本発明において、脂肪酸金属塩を配合し得る樹脂としては、溶融成形が可能な熱可塑性樹脂であれば従来公知のものをすべて使用でき、例えば、低-,中-,高-密度ポリエチレン、線状低密度ポリエチレン、線状超低密度ポリエチレン、アイソタクティックポリプロピレン、シンジオタクティックポリプロピレン、プロピレン-エチレン共重合体、ポリブテン-1、エチレン-ブテン-1共重合体、プロピレン-ブテン-1共重合体、エチレン-プロピレン-ブテン-1共重合体等のオレフィン樹脂、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタエート等のポリエステル樹脂、ナイロン6、ナイロン6,6、ナイロン6,10等のポリアミド樹脂、ポリカーボネート樹脂等を挙げることができ、特にポリエチレン、ポリプロピレン、ポリエステルを用いることが好適である。
また上記熱可塑性樹脂には、その用途に応じて、それ自体公知の各種配合剤、例えば、充填剤、可塑剤、レベリング剤、増粘剤、減粘剤、安定剤、酸化防止剤、紫外線吸収剤等を公知の処方に従って樹脂に含有することもできる。
本発明においては、脂肪酸金属塩と熱可塑性樹脂を混合加熱することにより、熱可塑性樹脂中に金属超微粒子が生成分散されて成る金属超微粒子含有樹脂組成物を製造するが、前述した通り、脂肪酸金属塩と熱可塑性樹脂の混合加熱を脂肪酸金属塩の分解開始温度未満の温度で行うことが重要である。
本発明において、脂肪酸金属塩の分解開始温度未満の温度は、生成された樹脂組成物中に金属超微粒子及び脂肪酸金属塩から脱離した脂肪酸が存在する限り、特に制限はない。
すなわち、金属超微粒子含有樹脂組成物の調製は、一般に二軸押出機で原料である脂肪酸金属塩と熱可塑性樹脂を混合加熱することにより行われており、一般に脂肪酸金属塩が分解し、金属超微粒子を形成するためには、脂肪酸金属塩の分解開始温度以上の温度で加熱することが必要である。脂肪酸金属塩の分解開始温度は、脂肪酸部分が金属部分から脱離あるいは分解し始める温度であり、一般的に開始温度はJIS K 7120により定義されている。これによれば、有機化合物(脂肪酸金属塩)の質量を計測し、熱重量測定装置を用いて不活性雰囲気下で昇温した際の重量変化を測定する熱重量測定(TG)を行う。測定により得られた熱重量曲線(TG曲線)から分解開始温度を算出する。試験加熱開始前の質量を通る横軸に平行な線とTG曲線における屈曲点間の勾配が最大になるような接線とが交わる点の温度を開始温度とすると定義づけられている。しかし、本発明は上記に定義される脂肪酸金属塩の分解開始温度以上の温度で加熱することを必要としない。なぜならば、実際には二軸押出機の設定温度以外にスクリューによる剪断発熱、或いは滞留時間等による影響を受けるため、本発明においては、脂肪酸金属塩の分解開始温度未満の温度で加熱する一方で、滞留時間や加熱時間、スクリュー回転数等の加工条件を調整することで、脂肪酸金属塩を分解し、金属超微粒子を形成する。
本発明においては、前述したように、脂肪酸金属塩の分解開始温度未満の温度で熱可塑性樹脂及び脂肪酸金属塩を混合加熱した溶融樹脂から、二本ロール法、射出成形、押出成形、圧縮成形等の従来公知の溶融成形を経て、最終成形品の用途に応じた形状、例えば、粒状、ペレット状、繊維状、フィルム、シート、容器等の樹脂成形体を成形することができる。
また本発明により得られる、脂肪酸金属塩を含有する樹脂組成物単独で金属超微粒子含有樹脂成形品を構成することもできるが、他の樹脂との組み合わせで多層構造とすることもできる。
(脂肪酸銀の作製)
ステアリン酸ナトリウム76.6gを90℃の水3000gに溶解させてA液を、硝酸銀40.3gを水600gに溶解させてB液をそれぞれ調整した。次に、A液を撹拌しながら、B液をA液に投入した。投入後15分撹拌し、吸引ろ過により固液分離を行いながら、脱イオン水を用いて十分に洗浄を行った。得られたステアリン酸銀を熱風乾燥機(タバイエスペック社製)にて乾燥した。
JIS K7120に従い、ステアリン酸銀の質量を計測し、熱重量測定装置(パーキンエルマー社製)を用い、窒素雰囲気下10℃/minの昇温速度で30~600℃までの重量減少を測定した。測定により得られたTG曲線から試験加熱開始前の質量を通る横軸(温度)に平行な線と屈曲点間の勾配が最大となるような接線とが交わる点の温度を算出し、ステアリン酸銀の分解開始温度とした。
脂肪酸銀と熱可塑性樹脂とを混合加熱して得られた樹脂組成物を分光光度計(島津製作所社製UV―3100PC)にて測定し、吸光度を求めた。なお、銀や銅などの超微粒子は、自由電子が光磁場による振動を受けて生じるプラズモン吸収に起因する発色を示すことが知られている。この吸収波長は金属の種類に固有するものであり、樹脂中に銀超微粒子が含有している場合には、波長420nm付近にプラズモン吸収は観測される。
樹脂組成物の成形時の発煙を目視により確認し、発生した煙を収集し揮発物を得た。揮発物をメチルエステル化、ヘキサン抽出し、GC-MSにより分析を行った。分析により得られたリテンションタイムの異なる各ピークの面積比から成分比を算出し、主成分を特定した。
口部をゴム栓で密封した窒素ガス置換した500mlガラス製瓶内に、悪臭物質メチルメルカプタン5μlをマイクロシリンジにて注入し、室温(25℃)で1日放置した。1日放置後、瓶中へガステック製検知管を挿入し残存メチルメルカプタン量を測定し消臭前メチルメルカプタン量(A)とした。
実施例1~10及び比較例1~6により作成されたフィルムを5cm四方(重量0.1g)に切り出し、窒素ガス置換した500mlガラス製瓶内に入れてゴム栓で密封した後、前記瓶内に悪臭物質メチルメルカプタン5μlをマイクロシリンジにて注入し、室温(25℃)で1日放置した。1日放置後、瓶中へガステック製検知管を挿入し残存メチルメルカプタン量を測定し、消臭後メチルメルカプタン量(B)とした。
前記消臭前メチルメルカプタン量(A)から消臭後メチルメルカプタン量(B)を引いた値を消臭前メチルメルカプタン量(A)で割り百分率で表した値を消臭率とした。
低密度ポリエチレン樹脂3kgに、前述の手法により作製し、分解開始温度を算出したステアリン酸銀を0.5wt%の含有率になるように配合し、押出成形機設定温度160℃、Q(吐出量)/N(スクリュー回転数)=3/150=0.02の成形条件で二軸押出機((株)東洋精機製作所製)にて押し出して厚み50μmのフィルムを作製し、前述したプラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を180℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を190℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を200℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を210℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
樹脂をポリオレフィンに変更し、押出成形機設定温度を180℃、Q(吐出量)/N(スクリュー回転数)=3/100=0.03にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ステアリン酸銀を0.2wt%にし、押出成形機設定温度を180℃、Q(吐出量)/N(スクリュー回転数)=3/50=0.06にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ステアリン酸銀を1.5wt%にし、押出成形機設定温度を180℃、Q(吐出量)/N(スクリュー回転数)=3/100=0.03にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ミリスチン酸銀を0.5wt%にし、押出成形機設定温度を180℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ベヘン酸銀を0.5wt%にし、押出成形機設定温度を180℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を130℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を240℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を260℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
押出成形機設定温度を280℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ミリスチン酸銀を0.5wt%にし、押出成形機設定温度を260℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
ベヘン酸銀を0.5wt%にし、押出成形機設定温度を260℃にした以外は、実施例1と同様にフィルムを作製し、プラズモン吸収の確認、発煙の確認及び揮発物の分析、メチルメルカプタン量の測定、メチルメルカプタンの消臭量の算出を行った。結果を表1に示す。
Claims (5)
- 脂肪酸金属塩と熱可塑性樹脂を混合加熱することにより、熱可塑性樹脂中に金属超微粒子が生成分散されて成る金属超微粒子含有樹脂組成物の製造方法において、前記脂肪酸金属塩と熱可塑性樹脂の混合加熱を前記脂肪酸金属塩の分解開始温度未満の温度で行うことを特徴とする金属超微粒子含有樹脂組成物の製造方法。
- 前記樹脂組成物が、プラズモン吸収を有する請求項1記載の金属超微粒子含有樹脂組成物の製造方法。
- 前記脂肪酸金属塩を熱可塑性樹脂100重量部当たり0.001乃至5重量部の量で配合する請求項1記載の金属超微粒子含有樹脂組成物の製造方法。
- 熱可塑性樹脂中に配合した脂肪酸金属塩の金属成分が銀であって、樹脂組成物中に存在する脂肪酸と脂肪酸銀のモル比が0.4~1.0である請求項1記載の金属超微粒子含有樹脂組成物の製造方法。
- 請求項1記載の製造方法により製造されてなる金属超微粒子含有樹脂組成物。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201080007177.4A CN102307934B (zh) | 2009-02-09 | 2010-02-09 | 含金属超微粒子的树脂组合物的制造方法 |
| JP2010549543A JP5693974B2 (ja) | 2009-02-09 | 2010-02-09 | 金属超微粒子含有樹脂組成物の製造方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-027266 | 2009-02-09 | ||
| JP2009027266 | 2009-02-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2010090331A1 true WO2010090331A1 (ja) | 2010-08-12 |
Family
ID=42542215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2010/051887 Ceased WO2010090331A1 (ja) | 2009-02-09 | 2010-02-09 | 金属超微粒子含有樹脂組成物の製造方法 |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP5693974B2 (ja) |
| CN (1) | CN102307934B (ja) |
| WO (1) | WO2010090331A1 (ja) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3693102A4 (en) | 2017-10-03 | 2021-06-02 | Toyo Seikan Group Holdings, Ltd. | COPPER METAL FINE PARTICLES AND METHOD OF MANUFACTURING THEREOF |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005048145A (ja) * | 2003-07-31 | 2005-02-24 | Ishizuka Glass Co Ltd | 難燃性および抗菌性付与用材料、抗菌難燃性樹脂 |
| JP2005048031A (ja) * | 2003-07-31 | 2005-02-24 | Ishizuka Glass Co Ltd | 抗菌剤、抗菌性樹脂および抗菌性繊維 |
| WO2005085358A1 (ja) * | 2004-03-03 | 2005-09-15 | Kaneka Corporation | 超微粒子含有熱可塑性樹脂組成物の製造方法 |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8106228B2 (en) * | 2006-12-08 | 2012-01-31 | Toyo Seikan Kaisha, Ltd. | Microprotein-inactivating ultrafine metal particles |
-
2010
- 2010-02-09 WO PCT/JP2010/051887 patent/WO2010090331A1/ja not_active Ceased
- 2010-02-09 JP JP2010549543A patent/JP5693974B2/ja active Active
- 2010-02-09 CN CN201080007177.4A patent/CN102307934B/zh active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005048145A (ja) * | 2003-07-31 | 2005-02-24 | Ishizuka Glass Co Ltd | 難燃性および抗菌性付与用材料、抗菌難燃性樹脂 |
| JP2005048031A (ja) * | 2003-07-31 | 2005-02-24 | Ishizuka Glass Co Ltd | 抗菌剤、抗菌性樹脂および抗菌性繊維 |
| WO2005085358A1 (ja) * | 2004-03-03 | 2005-09-15 | Kaneka Corporation | 超微粒子含有熱可塑性樹脂組成物の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5693974B2 (ja) | 2015-04-01 |
| CN102307934B (zh) | 2014-04-02 |
| JPWO2010090331A1 (ja) | 2012-08-09 |
| CN102307934A (zh) | 2012-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2009107721A1 (ja) | 金属超微粒子形成用脂肪酸金属塩 | |
| JP4820416B2 (ja) | 吸着性金属超微粒子含有吸着剤 | |
| CN101959537B (zh) | 吸附性组合物和吸附性成型制品 | |
| JP4835435B2 (ja) | 超微粒子含有熱可塑性樹脂組成物の製造方法 | |
| KR101544259B1 (ko) | 은 초미립자 함유 수지 조성물 | |
| JP4948556B2 (ja) | マスターバッチ及びその製造方法、並びに成形物の成形方法 | |
| JP5629428B2 (ja) | 金属超微粒子形成用脂肪酸金属塩 | |
| JP2009209052A (ja) | 金属超微粒子形成用脂肪酸金属塩 | |
| JP5693974B2 (ja) | 金属超微粒子含有樹脂組成物の製造方法 | |
| JP5629425B2 (ja) | 金属超微粒子形成用脂肪酸金属塩 | |
| JP5519525B2 (ja) | 銅超微粒子の製造方法、及び銅超微粒子含有樹脂組成物 | |
| JP2012077248A (ja) | 銀含有樹脂組成物及びその製造方法 | |
| JP5656540B2 (ja) | 銀含有樹脂組成物及びその製造方法 | |
| JP2010132774A (ja) | 吸着性成形体の製造方法 | |
| EP4378986A1 (en) | Self-migrating germicidal additives | |
| WO2008103560A2 (en) | Improved process for the manufacture of polymer additive granules containing silica antiblock agents |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WWE | Wipo information: entry into national phase |
Ref document number: 201080007177.4 Country of ref document: CN |
|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10738659 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2010549543 Country of ref document: JP Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 10738659 Country of ref document: EP Kind code of ref document: A1 |
