WO2014178271A1 - ポリブチレンテレフタレート樹脂組成物及び成形体 - Google Patents
ポリブチレンテレフタレート樹脂組成物及び成形体 Download PDFInfo
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- WO2014178271A1 WO2014178271A1 PCT/JP2014/060469 JP2014060469W WO2014178271A1 WO 2014178271 A1 WO2014178271 A1 WO 2014178271A1 JP 2014060469 W JP2014060469 W JP 2014060469W WO 2014178271 A1 WO2014178271 A1 WO 2014178271A1
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- polybutylene terephthalate
- terephthalate resin
- resin composition
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
Definitions
- the present invention relates to a polybutylene terephthalate resin composition and a molded body formed by molding the resin composition.
- Polyester resins are widely used in automobile parts, films, electrical / electronic parts, etc. because they have excellent mechanical properties, heat resistance, and moldability.
- polybutylene terephthalate resin which is a kind of polyester resin, has a high reinforcing effect by inorganic reinforcement and excellent chemical resistance. Therefore, industrial molded products such as connectors, relays and switches for automobiles and electrical / electronic devices can be used. Widely used as a raw material for manufacturing.
- the polybutylene terephthalate resin has a phenomenon in which gas generated by decomposition of the resin during molding is released when the molded body is used. Among the generated gases, the release of a low molecular weight organic compound (volatile organic compound (VOC)) that easily volatilizes at room temperature becomes a problem.
- VOC volatile organic compound
- Patent Document 1 describes that when the amount of terminal hydroxyl groups of the polybutylene terephthalate resin is large, the amount of THF generated during molding increases.
- the use of a polybutylene terephthalate resin having a low terminal hydroxyl group concentration is disclosed. And it is disclosed that the hydroxyl group at the terminal of the polybutylene terephthalate resin can be stabilized by adding an alkali metal salt to the polybutylene terephthalate resin.
- the terminal hydroxyl group concentration is obtained by subtracting the number of COOH terminals from the total number of terminals”, so “the terminal hydroxyl group concentration is low” also means “there are many COOH terminals”
- polybutylene terephthalate resin is disadvantageous in hydrolysis resistance.
- Patent Document 2 discloses that when a polybutylene terephthalate resin is polymerized, generation of THF is prevented by adding a titanium catalyst, a phosphorus compound, and an alkali or alkaline earth metal. However, this method has a problem that the polymerization rate becomes slow depending on the type and amount of the alkaline metal compound used.
- Patent Document 3 discloses a method of reducing the concentration of foreign substances and terminal carboxyl groups while suppressing delay in the polymerization rate by adding an organic titanium compound or an alkali metal salt when polymerizing a polybutylene terephthalate resin. Has been. However, since this method divides the addition step of the organic titanium compound or the alkali metal salt, the management becomes complicated. Furthermore, this method requires addition of an addition device, so that it is difficult to divert existing equipment, which requires further investment and is economically disadvantageous.
- VOC occurs during molding of a polybutylene terephthalate resin composition containing a polybutylene terephthalate resin
- VOC is likely to be released from the molded body when a molded body formed by molding the resin composition is used.
- the present invention has been made in order to solve the above-mentioned problems, and its purpose is to make it difficult to release VOC from a molded body obtained by molding a polybutylene terephthalate resin composition, including VOC other than THF. Is to provide.
- the polybutylene terephthalate resin composition containing the produced polybutylene terephthalate resin and the alkali compound added during the production of the polybutylene terephthalate resin, but is produced by a direct esterification method without adding an alkali compound.
- Polybutylene terephthalate resin and aluminum By using the polybutylene terephthalate resin composition produced by melt-kneading with a compound, a problem with the aldehyde can be efficiently suppressed by a simple method, and the amount of VOC released during use of the molded body can be reduced. As a result, the present invention has been completed. More specifically, the present invention provides the following.
- the addition amount of the said calcium carbonate in a polybutylene terephthalate resin composition is 0.01 mass% or more and 12.0 mass% or less with respect to the whole said polybutylene terephthalate resin composition.
- Polybutylene terephthalate resin composition is 0.01 mass% or more and 12.0 mass% or less with respect to the whole said polybutylene terephthalate resin composition.
- the molded body formed by molding the polybutylene terephthalate resin composition of the present invention has a small amount of VOC released from the molded body during use.
- the polybutylene terephthalate resin composition of the present invention contains a polybutylene terephthalate resin and calcium carbonate.
- the polybutylene terephthalate resin used in the present invention is a general polybutylene terephthalate resin, and is a repeating unit derived from at least a repeating unit derived from terephthalic acid and an alkylene glycol (1,4-butanediol) having at least 4 carbon atoms. Including units.
- the polybutylene terephthalate resin used in the present invention is a polybutylene terephthalate resin produced by a direct esterification method.
- a direct esterification method and a transesterification method are known.
- a polybutylene terephthalate resin is produced by a direct esterification method. The amount of VOC generated from the body can be reduced.
- the direct esterification method is a method in which terephthalic acid and 1,4-butanediol are reacted as main raw materials in the presence of an esterification reaction catalyst.
- the transesterification method is a method in which dialkyl terephthalate and 1,4-butanediol are used as main raw materials, and terephthalic acid and 1,4-butanediol are reacted in the presence of a transesterification reaction catalyst.
- the polybutylene terephthalate resin may be one produced by a direct esterification method, and the production conditions are not particularly limited.
- the esterification reaction catalyst for example, an antimony compound, a germanium compound, a titanium compound, a tin compound, an alkaline earth metal compound, a manganese compound, a zinc compound, or the like can be used. Further, the amount of the catalyst used is not particularly limited, and may be set as appropriate.
- reaction conditions such as reaction temperature, reaction pressure, reaction time and the like are not particularly limited, and may be set as appropriate according to the desired molecular weight.
- the polybutylene terephthalate resin thus produced has a repeating unit derived from terephthalic acid and a repeating unit derived from 1,4-butanediol.
- the polybutylene terephthalate resin of the present invention is not limited to a homopolybutylene terephthalate resin composed of butylene terephthalate units, but is a copolymer containing 60 mol% or more (particularly 75 mol% or more and 95 mol% or less) of butylene terephthalate units. There may be.
- These dicarboxylic acid components can be used alone or in combination of two or more.
- glycol components (comonomer components) other than 1,4-butanediol include, for example, ethylene glycol, propylene glycol, trimethylene glycol, 1,3-butylene glycol, hexamethylene glycol, neopentyl glycol, and 1,3-octanediol.
- C 2-10 alkylene glycol such as diethylene glycol, triethylene glycol, dipropylene glycol and the like; alicyclic diol such as cyclohexanedimethanol and hydrogenated bisphenol A; bisphenol A, 4,4′-dihydroxy aromatic diols biphenyl, ethylene oxide 2 mol adduct of bisphenol a, propylene oxide 3 mol adduct of bisphenol a, Al of C 2-4 of bisphenol a Alkylene oxide adducts thereof.
- These glycol components can be used alone or in combination of two or more.
- the amount of terminal carboxyl groups of the polybutylene terephthalate resin used in the present invention is not particularly limited, but the present invention generates from the molded article even if a polybutylene terephthalate resin having a small amount of terminal carboxyl groups, that is, a large amount of terminal hydroxyl groups is used.
- the amount of VOC can be reduced.
- THF tetrahydrofuran
- the above VOC emission can be achieved even when using polybutylene terephthalate resin having a large amount of terminal hydroxyl groups. The amount can be reduced.
- polybutylene terephthalate resin with a small amount of terminal carboxyl groups is excellent in hydrolysis resistance.
- the molded object manufactured using the polybutylene terephthalate resin composition of this invention is excellent in hydrolysis resistance, and there are also few releases of VOC.
- the amount of terminal carboxyl groups is small means that it is 40 meq / kg or less. From the viewpoint of further improving hydrolysis resistance, the amount of terminal carboxyl groups is more preferably 25 meq / kg or less. Thus, even if the amount of terminal carboxyl group of the polybutylene terephthalate resin is set to 25 meq / kg or less so that the molded body is less susceptible to strength reduction due to hydrolysis in a moist heat environment, Can significantly reduce the amount of VOC generated.
- the amount of terminal carboxyl groups can be obtained by dissolving a ground sample of polybutylene terephthalate in benzyl alcohol at 215 ° C. for 10 minutes, and titrating with a 0.01N aqueous sodium hydroxide solution for measurement.
- the intrinsic viscosity of the polybutylene terephthalate resin used in the present invention is not particularly limited as long as the object of the present invention is not impaired.
- the intrinsic viscosity (IV) of the polybutylene terephthalate resin is preferably 0.65 dL / g or more and 1.4 dL / g or less.
- the intrinsic viscosity can also be adjusted by blending polybutylene terephthalate resins having different intrinsic viscosities.
- a polybutylene terephthalate resin having an intrinsic viscosity of 0.9 dL / g is prepared by blending a polybutylene terephthalate resin having an intrinsic viscosity of 1.0 dL / g and a polybutylene terephthalate resin having an intrinsic viscosity of 0.7 dL / g. Can do.
- the intrinsic viscosity (IV) of the polybutylene terephthalate resin can be measured in o-chlorophenol at a temperature of 35 ° C.
- the content of the polybutylene terephthalate resin in the polybutylene terephthalate resin composition of the present invention is not particularly limited, but is preferably 10% by mass or more and less than 99.99% by mass. Moreover, if the said content is 30 mass% or more, since the improvement of the physical property by containing polybutylene terephthalate resin appears in a molded object, it is especially preferable. More preferably, the content is 50% by mass or more and less than 99.99% by mass.
- the polybutylene terephthalate resin composition of the present invention contains calcium carbonate. By containing calcium carbonate, the amount of VOC released from the molded product obtained by molding the resin composition of the present invention can be suppressed.
- the shape of calcium carbonate that can be used in the present invention is not particularly limited, and examples thereof include powdery, granular, lump, and tablet shapes.
- the content of calcium carbonate contained in the polybutylene terephthalate resin composition of the present invention is not particularly limited because it may be set according to the desired VOC emission amount, etc., but is 0 for the entire polybutylene terephthalate resin composition. It is preferable that it is 0.01 mass% or more and 12.0 mass% or less, and it is more preferable that it is 0.1 mass% or more and 10.0 mass% or less. It is preferable that the content is 0.01% by mass or more because the generation of VOC derived from the monomer component can be sufficiently suppressed, and the content is 12.0% by mass or less.
- the content is more than 0.1% by mass and 5.0% by mass or less, particularly preferably 0.2% by mass or more and 3.0% by mass or less, and most preferably 0.25% by mass or more. 2.5% by mass or less. Setting the content of calcium carbonate in the polybutylene terephthalate resin composition to be in such a range can suppress the decrease in impact resistance of the polybutylene terephthalate resin composition in addition to lowering the amount of VOC generated.
- the content is 3.0% by mass or less from the viewpoint of suppressing a decrease in hydrolysis resistance of the polybutylene terephthalate resin.
- the polybutylene terephthalate resin type is different (for example, when the molecular weight, terminal carboxyl group amount, and copolymerization component included are different) even if it is outside the above preferred range, the VOC emission amount falls within the desired range. Such cases are also within the scope of the present invention.
- the polybutylene terephthalate resin composition of the present invention may contain other components other than the essential components.
- other components include fillers (inorganic fillers, etc.), nucleating agents, pigments, antioxidants, stabilizers, plasticizers, lubricants, release agents, flame retardants, and other resins, and other resins. Can be mentioned.
- a resin composition can be prepared by a known equipment and method as a method for preparing a resin composition.
- necessary components can be mixed and kneaded using a single or twin screw extruder or other melt kneader to prepare pellets for molding.
- a plurality of extruders or other melt kneaders may be used.
- all the components may be charged simultaneously from the hopper, or some components may be charged from the side feed port.
- a molded product can be produced using the polybutylene terephthalate resin composition pellets produced as described above as a raw material by a conventionally known molding method such as injection molding.
- a conventionally known molding method such as injection molding.
- the molded body obtained as described above has a VOC emission amount of 50 ⁇ g C / g or less according to the VOC measurement method prescribed in the German Automobile Manufacturers Association VDA277. Therefore, the molded article formed by molding the polybutylene terephthalate resin composition of the present invention reduces the amount of VOC released during use. VOC released at the time of use is particularly problematic when used in a vehicle or indoors, such as when a molded body is used as an automobile interior part. If it is the molded object of this invention, it can use preferably also in the inside of a vehicle or indoor.
- the tensile test piece manufactured by the above method was allowed to stand for 500 hours under the condition of a temperature of 180 ° C. using a gear oven manufactured by Toyo Seiki Seisakusho, and then the tensile strength was measured in accordance with ISO527-1,2. (Tensile strength B).
- the tensile strength retention after heat treatment ((tensile strength B) / (tensile strength A) ⁇ 100 (%)) was determined from the tensile strengths A and B, and the heat resistance was evaluated according to the following criteria. The results are shown in Table 2.
- the tensile strength retention after wet heat treatment ((tensile strength C) / (tensile strength A) ⁇ 100 (%)) was determined, and hydrolysis resistance was evaluated according to the following criteria. The results are shown in Table 2. ⁇ : The tensile strength retention was 90% or more, and the hydrolysis resistance was good. X: The tensile strength retention was less than 90%, and the hydrolysis resistance was poor.
- a polybutylene terephthalate resin composition produced by combining a polybutylene terephthalate resin produced by direct esterification without adding an alkali compound and calcium carbonate, and melt-kneading the composition. It was confirmed that the amount of VOC released from the molded body is extremely low and the heat resistance is excellent. Further, it was confirmed that the polybutylene terephthalate resin composition in which the addition amount of calcium carbonate is 2.5% by mass or less is particularly excellent in impact resistance and hydrolysis resistance.
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Abstract
Description
本発明のポリブチレンテレフタレート樹脂組成物は、ポリブチレンテレフタレート樹脂と、炭酸カルシウムとを含む。
本発明で用いるポリブチレンテレフタレート樹脂は、一般的なポリブチレンテレフタレート樹脂であり、少なくともテレフタル酸に由来する繰り返し単位と、少なくとも炭素原子数4のアルキレングリコール(1,4-ブタンジオール)に由来する繰り返し単位とを含む。
本発明のポリブチレンテレフタレート樹脂組成物は炭酸カルシウムを含む。炭酸カルシウムが含まれることで、本発明の樹脂組成物を成形してなる成形体から放出されるVOC量を抑えることができる。
本発明のポリブチレンテレフタレート樹脂組成物には上記必須成分以外のその他の成分を含んでもよい。その他の成分としては、例えば、充填剤(無機充填剤等)、核剤、顔料、酸化防止剤、安定剤、可塑剤、滑剤、離型剤及び難燃剤等の添加剤、その他の樹脂等を挙げることができる。
本発明のポリブチレンテレフタレート樹脂組成物の製造方法は特に限定されない。一般に樹脂組成物の調製法として公知の設備と方法により、樹脂組成物を調製することができる。例えば、必要な成分を混合し、1軸又は2軸の押出機又はその他の溶融混練装置を使用して混練し、成形用ペレットとして調製することができる。また、押出機又はその他の溶融混練装置は複数使用してもよい。また、全ての成分をホッパから同時に投入してもよいし、一部の成分はサイドフィード口から投入してもよい。
射出成形等の従来公知の成形方法で、上記のようにして製造したポリブチレンテレフタレート樹脂組成物ペレットを原料とし、成形体を製造することができる。なお、一旦樹脂組成物ペレットにする必要はないため、各成分を押出機等の溶融混練装置に直接供給して成形体を製造してもよい。
直接エステル化法で製造されたポリブチレンテレフタレート樹脂:ウィンテックポリマー社製、「ジュラネックス(登録商標)」、IV=0.69dL/g、末端カルボキシル基量が23meq/kg、直接エステル化法による製造時にアルカリ化合物を添加せず
炭酸カルシウム:東洋ファインケミカル株式会社、ホワイトンP-30
酢酸カリウム:和光純薬工業株式会社、酢酸カリウム
直接エステル化法で製造されたポリブチレンテレフタレート樹脂に、炭酸カルシウム又は酢酸カリウムを表1に示す割合で混合したものを原料とし、この原料を二軸押出機(JSW製、TEX-30)に投入し、溶融混練してポリブチレンテレフタレート樹脂ペレットを製造した。なお、冷却時間以外の条件は下記の通りである。
(溶融混練条件)
シリンダー温度:260℃
スクリュー回転数:130rpm
押出量:12kg/hr
表1に示す成分を表1に示す割合で混合して調製した実施例及び比較例の樹脂ペレットを、射出成形機(JSW社製、「J75EP」)に供給して成形体(100mm×40mm×2mm)を下記成形条件で製造した。
(成形条件)
成形条件:シリンダー温度:250℃
射出圧力:60(MPa)
射出速度:1.0(m/min)
金型温度:60(℃)
実施例、比較例の成形体を10~25mgに切断したサンプル約2gをそれぞれ22mlのバイアル瓶に入れ、サンプル重量を精秤した後、密封してHS-GCで120℃、5時間加熱処理を行った。そして、ガスクロマトグラフィーで検出された揮発有機物成分のピーク積分面積を算出し、アセトンを標準に重量換算値として、成形体の重量当たりの揮発性有機化合物量(μgC/g)を求めた。結果を表1に示す。
表2に示す成分を表2に示す割合で混合して調製した実施例及び比較例の樹脂ペレットを、140℃で3時間乾燥後、樹脂温度260℃、金型温度80℃、射出時間15秒、冷却時間15秒で射出成形して、ISO3167引張試験片を得た。続いて、各引張試験片を用いて、温度23℃、湿度50%の条件下で、ISO527-1,2に準拠し引張強度を測定した(引張強度A)。
○:上記引張強度保持率が70%以上であり、耐熱性が良好であった。
×:上記引張強度保持率が70%未満であり、耐熱性が不良であった。
耐熱性の評価の項で製造した引張試験片を、プレッシャークッカー試験機で121℃、100%RHの条件で20時間湿熱処理した後、ISO527-1,2に準拠し引張強度を測定した(引張強度C)。
○:上記引張強度保持率が90%以上であり、耐加水分解性が良好であった。
×:上記引張強度保持率が90%未満であり、耐加水分解性が不良であった。
耐熱性の評価の項で調製した上記樹脂ペレットを、140℃で3時間乾燥後、成形温度260℃、金型温度80℃で射出成形して、シャルピー衝撃試験片を作製し、ISO179/1eAに準拠して、23℃でシャルピー衝撃強度を測定した。結果を表2に示す。
Claims (5)
- 直接エステル化法で製造されたポリブチレンテレフタレート樹脂と、
炭酸カルシウムと、を含むポリブチレンテレフタレート樹脂組成物であり、
前記ポリブチレンテレフタレート樹脂組成物を成形してなる成形体の、ドイツ自動車工業会VDA277に規定のVOC測定法によるVOC排出量が50μgC/g以下であるポリブチレンテレフタレート樹脂組成物。 - ポリブチレンテレフタレート樹脂組成物における、前記炭酸カルシウムの添加量が、前記ポリブチレンテレフタレート樹脂組成物全体に対して0.01質量%以上12.0質量%以下である請求項1に記載のポリブチレンテレフタレート樹脂組成物。
- 前記ポリブチレンテレフタレート樹脂は、末端カルボキシル基量が40meq/kg以下である請求項1又は2に記載のポリブチレンテレフタレート樹脂組成物。
- 請求項1から3のいずれかに記載のポリブチレンテレフタレート樹脂組成物を成形してなる成形体。
- 前記成形体が自動車内装部品である請求項4に記載の成形体。
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CN201480024166.5A CN105189647B (zh) | 2013-04-30 | 2014-04-11 | 聚对苯二甲酸丁二醇酯树脂组合物和成型体 |
DE112014002214.4T DE112014002214T5 (de) | 2013-04-30 | 2014-04-11 | Polybutylenterephthalat-Harz-Zusammensetzung und Formgegenstand |
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Cited By (3)
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CN106117861A (zh) * | 2015-05-04 | 2016-11-16 | 三星Sdi株式会社 | 耐热的热塑性树脂组合物和使用其制造的模制品 |
WO2017014239A1 (ja) * | 2015-07-22 | 2017-01-26 | ウィンテックポリマー株式会社 | ポリブチレンテレフタレート樹脂組成物の製造方法及びポリブチレンテレフタレート樹脂成形体の製造方法 |
JP2020516573A (ja) * | 2017-04-13 | 2020-06-11 | イメルテック ソシエテ パル アクシオン サンプリフィエ | 揮発性有機化合物の排出を削減するための沈降炭酸カルシウム |
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CN106221145B (zh) * | 2016-08-17 | 2018-06-15 | 广州市罗曼士乐器制造有限公司 | 一种改性材料及乐器弦 |
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- 2014-04-11 CN CN201480024166.5A patent/CN105189647B/zh active Active
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- 2014-04-11 WO PCT/JP2014/060469 patent/WO2014178271A1/ja active Application Filing
- 2014-04-16 TW TW103113809A patent/TW201500446A/zh unknown
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
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CN106117861A (zh) * | 2015-05-04 | 2016-11-16 | 三星Sdi株式会社 | 耐热的热塑性树脂组合物和使用其制造的模制品 |
WO2017014239A1 (ja) * | 2015-07-22 | 2017-01-26 | ウィンテックポリマー株式会社 | ポリブチレンテレフタレート樹脂組成物の製造方法及びポリブチレンテレフタレート樹脂成形体の製造方法 |
JP6113941B1 (ja) * | 2015-07-22 | 2017-04-12 | ウィンテックポリマー株式会社 | ポリブチレンテレフタレート樹脂組成物の製造方法及びポリブチレンテレフタレート樹脂成形体の製造方法 |
CN107849339A (zh) * | 2015-07-22 | 2018-03-27 | 胜技高分子株式会社 | 聚对苯二甲酸丁二醇酯树脂组合物的制造方法和聚对苯二甲酸丁二醇酯树脂成型体的制造方法 |
JP2020516573A (ja) * | 2017-04-13 | 2020-06-11 | イメルテック ソシエテ パル アクシオン サンプリフィエ | 揮発性有機化合物の排出を削減するための沈降炭酸カルシウム |
US11498848B2 (en) | 2017-04-13 | 2022-11-15 | Imerys Minerals Limited | Precipitated calcium carbonate for reducing emissions of volatile organic compounds |
JP7319926B2 (ja) | 2017-04-13 | 2023-08-02 | イメルテック ソシエテ パル アクシオン サンプリフィエ | 揮発性有機化合物の排出を削減するための沈降炭酸カルシウム |
Also Published As
Publication number | Publication date |
---|---|
CN105189647A (zh) | 2015-12-23 |
DE112014002214T5 (de) | 2016-01-28 |
TW201500446A (zh) | 2015-01-01 |
CN105189647B (zh) | 2019-03-01 |
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