JPH0830137B2 - Polyacetal resin composition - Google Patents
Polyacetal resin compositionInfo
- Publication number
- JPH0830137B2 JPH0830137B2 JP62329238A JP32923887A JPH0830137B2 JP H0830137 B2 JPH0830137 B2 JP H0830137B2 JP 62329238 A JP62329238 A JP 62329238A JP 32923887 A JP32923887 A JP 32923887A JP H0830137 B2 JPH0830137 B2 JP H0830137B2
- Authority
- JP
- Japan
- Prior art keywords
- polyacetal resin
- inorganic filler
- resin composition
- acid
- weight
- 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.)
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- Compositions Of Macromolecular Compounds (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ポリアセタール樹脂が本来有する強度及び
靱性等の優れた性質をバランス良く保持し、かつ光沢が
抑えられたポリアセタール樹脂組成物に関する。TECHNICAL FIELD The present invention relates to a polyacetal resin composition in which excellent properties such as strength and toughness inherent in a polyacetal resin are retained in a well-balanced manner and gloss is suppressed.
周知の如く、ポリアセタール樹脂は、機械的性質、電
気的特性などの物理的特性、或いは耐薬品性、耐熱性な
どの化学的特性が優れた代表的なエンジニアリング樹脂
として、近年極めて広汎な分野において利用されてい
る。しかしポリアセタール樹脂が利用される分野の拡大
に伴い、その材料としての性質にも、更に特殊性が要求
される。As is well known, polyacetal resins have been used in an extremely wide range of fields in recent years as a representative engineering resin with excellent physical properties such as mechanical properties and electrical properties, or chemical properties such as chemical resistance and heat resistance. Has been done. However, with the expansion of fields in which polyacetal resins are used, the properties of the materials are required to be more specific.
このような性質の一つとして、自動車の内装部品、光
学機械等の分野においては、光の反射による目に対する
刺激を抑え、高級感を出すこと、光の反射による機器の
誤動作を防止すること等を目的として光沢の少ない、即
ち光の反射の少ないものが要求される場合がある。この
要求に応えるため、従来よりポリアセタール樹脂に対し
て炭酸カルシウム、タルク等の無機フィラーを添加する
方法が知られている。As one of these properties, in the field of automobile interior parts, optical machinery, etc., it suppresses eye irritation due to light reflection, gives a high-class feeling, prevents malfunction of equipment due to light reflection, etc. For that purpose, there may be a case where a material having low gloss, that is, light reflection is required. In order to meet this demand, conventionally known is a method of adding an inorganic filler such as calcium carbonate or talc to a polyacetal resin.
しかし、これらの従来から提案されている方法でも光
沢低減の面では望ましい性質を有するポリアセタール樹
脂組成物が得られるものの、反面、機械的特性、特に伸
度、靱性が低下し、成形品の後加工や組立時の応力或い
は成形品の取り扱い時に落下させる等の衝撃が加えると
容易に破損するという欠点を有するものであり、その改
善が望まれていた。However, even with these conventionally proposed methods, a polyacetal resin composition having desirable properties in terms of gloss reduction can be obtained, but on the other hand, mechanical properties, particularly elongation and toughness are decreased, and post-processing of molded products It also has a drawback that it is easily damaged when subjected to stress during assembly or impact such as dropping during handling of a molded product, and its improvement has been desired.
本発明者らは、これらの欠点を解消したポリアセター
ル樹脂組成物を得るべく鋭意研究の結果、特定の処理剤
で予め表面処理を施した粉粒状無機充填材の配合が、極
めて好適であることを見出し、本発明を完成するに至っ
たものである。As a result of intensive research to obtain a polyacetal resin composition in which these drawbacks have been solved, the present inventors have found that the blending of a powdery or granular inorganic filler that has been surface-treated with a specific treatment agent is extremely suitable. It was found that the present invention has been completed.
即ち本発明は、ポリアセタール樹脂100重量部に平均
粒径100μｍ以下の粉粒状無機充填材１〜100重量部を配
合してなるポリアセタール樹脂組成物において、該粉粒
状無機充填材が炭素数12以上の脂肪酸、及びその金属塩
から選ばれた１種又は２種以上の表面処理剤又は付着剤
0.1〜20重量％（対該粉粒状無機充填材）で予め表面処
理されていることを特徴とするポリアセタール樹脂組成
物に関するものである。That is, the present invention is a polyacetal resin composition comprising 100 parts by weight of a polyacetal resin and 1 to 100 parts by weight of a particulate inorganic filler having an average particle size of 100 μm or less, wherein the particulate inorganic filler has a carbon number of 12 or more. One or more surface treatment agents or adhesives selected from fatty acids and metal salts thereof
The present invention relates to a polyacetal resin composition, which is previously surface-treated with 0.1 to 20% by weight (based on the powdery or granular inorganic filler).
本発明において用いられるポリアセタール樹脂として
は、ポリオキシメチレンホモポリマー、又は主鎖の大部
分がオキシメチレン連鎖よりなるポリアセタールコポリ
マー、ターポリマー等のいずれをも利用することができ
る。重合度等にも特に制限はない。As the polyacetal resin used in the present invention, any of polyoxymethylene homopolymers, polyacetal copolymers in which the main chain is mostly oxymethylene chains, terpolymers and the like can be used. The degree of polymerization is not particularly limited.
本発明においては斯かるポリアセタール樹脂に特定の
処理剤で表面処理が施された無機充填材が配合される。In the present invention, such a polyacetal resin is mixed with an inorganic filler surface-treated with a specific treating agent.
ここで用いられる粉粒状無機充填材は粒径が大きくな
るに伴い、フローマークの発生や凹凸の形成により、成
形品の外観を損ねる傾向があり、この傾向は、ある粒径
以上になると著しいものとなる。よって本発明において
は、無機充填材として平均粒径が100μｍ以下の粉粒状
のものが用いられる。好ましくは平均粒径が0.01〜50μ
ｍのもの、特に好ましくは0.05〜10μｍのものである。The particle-like inorganic filler used here tends to impair the appearance of the molded product due to the generation of flow marks and the formation of irregularities as the particle size increases, and this tendency is remarkable when the particle size exceeds a certain value. Becomes Therefore, in the present invention, an inorganic filler having an average particle diameter of 100 μm or less is used. Preferably the average particle size is 0.01-50μ
m, particularly preferably 0.05 to 10 μm.
また本発明においては、使用する粉粒状無機充填材の
種類については特に限定されるものではないが、本発明
の目的である光沢低減に対する効率或いは諸物性等を考
慮すると、周期律表II族又はIII族金属の酸化物、水酸
化物、炭酸塩、珪酸塩、硫酸塩もしくは二酸化珪素を主
たる構成成分とするものが好ましい。その例としては、
酸化カルシウム、酸化亜鉛、アルミナ、水酸化カルシウ
ム、炭酸カルシウム、炭酸マグネシウム、硫酸カルシウ
ム、硫酸バリウム、タルク、クレー、カオリン、ベント
ナイト、ドロマイト、シリカ等が挙げられる。特に炭酸
カルシウム、タルクを用いるのが好ましい。Further, in the present invention, the type of the powdery or granular inorganic filler to be used is not particularly limited, but in consideration of the efficiency for gloss reduction or various physical properties which is the object of the present invention, the periodic table group II or Those containing a Group III metal oxide, hydroxide, carbonate, silicate, sulfate or silicon dioxide as a main constituent are preferable. For example,
Examples thereof include calcium oxide, zinc oxide, alumina, calcium hydroxide, calcium carbonate, magnesium carbonate, calcium sulfate, barium sulfate, talc, clay, kaolin, bentonite, dolomite and silica. It is particularly preferable to use calcium carbonate or talc.
本発明において上記の如き粉粒状無機充填材は、特定
の有機化合物で予め表面処理されていることが必須であ
る。ここで表面処理に用いられる表面処理剤又は付着剤
とは、12個以上の炭素原子を有する飽和又は不飽和脂肪
酸及びその金属塩から選ばれるものである。In the present invention, it is essential that the above-mentioned powdery inorganic filler is surface-treated with a specific organic compound in advance. The surface treatment agent or adhesive used for the surface treatment is selected from saturated or unsaturated fatty acids having 12 or more carbon atoms and metal salts thereof.
このような脂肪酸の例としては、ラウリン酸、トリデ
シル酸、ミリスチン酸、ペンタデシル酸、パルミチン
酸、ヘプタデシル酸、ステアリン酸、ノナデカン酸、ア
ラキン酸、ベヘン酸、リグノセリン酸、セロチン酸、ヘ
プタコサン酸、モンタン酸、メリシン酸、ラクセル酸、
オレイン酸、エライジン酸、リノール酸、リノレン酸、
アラキドン酸、セトレイン酸、エルカ酸等がある。Examples of such fatty acids include lauric acid, tridecyl acid, myristic acid, pentadecyl acid, palmitic acid, heptadecyl acid, stearic acid, nonadecanoic acid, arachidic acid, behenic acid, lignoceric acid, cerotic acid, heptacosanoic acid, montanic acid. , Melissic acid, laxeric acid,
Oleic acid, elaidic acid, linoleic acid, linolenic acid,
Examples include arachidonic acid, cetoleic acid and erucic acid.
また、これらの脂肪酸の金属塩としては、カルシウム
塩、マグネシウム塩、亜鉛塩、バリウム塩、ナトリウム
塩、アルミニウム塩等が挙げられる。Examples of metal salts of these fatty acids include calcium salts, magnesium salts, zinc salts, barium salts, sodium salts and aluminum salts.
本発明においては、上記の内、特に脂肪酸が好適であ
り、中でも12〜30個の炭素原子数の飽和脂肪酸は極めて
有効である。In the present invention, of the above, fatty acids are particularly preferable, and among them, saturated fatty acids having 12 to 30 carbon atoms are extremely effective.
本発明において斯かる表面処理剤又は付着剤による無
機充填材の処理法としては、特に限定はなく、公知の方
法で処理することが可能である。例えば、処理剤の融点
以上の温度で無機充填材と処理剤を撹拌混合する方法、
表面処理剤を溶剤に溶解させ、これを無機充填材と撹拌
混合した後、溶剤を揮発除去させる方法等がいずれも可
能である。In the present invention, the method of treating the inorganic filler with such a surface treating agent or an adhesive is not particularly limited, and a known method can be used. For example, a method of stirring and mixing the inorganic filler and the treating agent at a temperature equal to or higher than the melting point of the treating agent,
Any method of dissolving the surface treating agent in a solvent, stirring and mixing this with the inorganic filler, and then volatilizing and removing the solvent is possible.
本発明において用いられる粉粒状無機充填材は上記の
如き化合物を用い、無機充填材に対し0.1〜20重量％の
量の表面処理剤又は付加剤を有する様に表面処理された
ものである。The powdery inorganic filler used in the present invention is a surface-treated one using the compound as described above so as to have a surface treating agent or an additive in an amount of 0.1 to 20% by weight based on the inorganic filler.
表面処理剤の量が0.1重量％未満では本発明者の目的
である機械的強度、特に伸度、靱性の向上効果は得られ
ず、逆に20重量％を越えると成形品の強度低下、組成物
の熱安定性の悪化を招くため好ましない。好ましい表面
処理剤の量は、粉粒状無機充填材に対し0.5〜10重量％
であり、より好ましくは１〜７重量％である。If the amount of the surface treatment agent is less than 0.1% by weight, the effect of improving the mechanical strength, particularly elongation and toughness, which is the object of the present inventor, cannot be obtained, while if it exceeds 20% by weight, the strength of the molded article decreases and the composition It is not preferable because it causes deterioration of thermal stability of the product. The preferable amount of the surface treatment agent is 0.5 to 10% by weight based on the particulate inorganic filler.
And more preferably 1 to 7% by weight.
本発明において、斯かる如く表面処理された粉粒状無
機フィラーのポリアセタール樹脂への添加量は、ポリア
セタール樹脂100重量部に対して１〜100重量部である。
これより少ない量では十分な光沢低減効果を得ることが
できず、これより多い量では機械的物性の低下や熱安定
性の悪化等を招く場合がある。好ましい添加量は５〜70
重量部であり、特に10〜45重量部の範囲が好適である。In the present invention, the amount of the powdery inorganic filler surface-treated as described above is added to the polyacetal resin in an amount of 1 to 100 parts by weight based on 100 parts by weight of the polyacetal resin.
If the amount is smaller than this, a sufficient gloss reduction effect cannot be obtained, and if the amount is larger than this, mechanical properties may be deteriorated or thermal stability may be deteriorated. The preferred addition amount is 5 to 70
Parts by weight, particularly preferably in the range of 10 to 45 parts by weight.
尚、粉粒状無機充填材を予め表面処理することなく、
脂肪酸等と無機フィラーを単にポリアセタール樹脂に配
合したのでは好ましい物性は得られず、かかる物質で予
め表面処理された無機フィラーを配合した本発明の方法
によって初めて好ましい物性が得られるのである。Incidentally, without prior surface treatment of the powdery inorganic filler,
The preferred physical properties cannot be obtained by simply blending the fatty acid and the inorganic filler in the polyacetal resin, and the preferred physical properties can be obtained only by the method of the present invention in which the inorganic filler preliminarily surface-treated with such a substance is blended.
本発明の組成物は、さらに公知の各種安定剤を添加し
て安定性を補強することができる。また、目的とする用
途に応じてその物性を改善するため、更に公知の各種の
添加物を配合し得る。添加物の例を示せば、各種の着色
剤、滑剤、離型剤、核剤、界面活性剤、異種ポリマー、
有機高分子改良剤及び無機、有機、金属等の繊維状、粉
粒状、板状のフィラーが挙げられ、これらの１種又は２
種以上混合使用できる。The composition of the present invention may be added with various known stabilizers to enhance the stability. Moreover, in order to improve the physical properties depending on the intended use, various known additives may be further added. Examples of additives include various colorants, lubricants, release agents, nucleating agents, surfactants, different polymers,
Examples include organic polymer modifiers and fibrous, powdery, and plate-like fillers of inorganic, organic, metal, etc., and one or two of these.
A mixture of two or more species can be used.
本発明の組成物の調製は、従来の樹脂組成物調製法と
して一般に用いられる公知の方法により容易に調製され
る。例えば、各成分を混合した後押出機により練込押出
してペレットを調製し、しかる後、成形する方法、一旦
組成の異なるペレットを調製し、そのペレットを所定量
混合して成形に供し、成形後に目的組成の成形品を得る
方法、成形機に各成分の１又は２以上を直接仕込む方法
等、いずれも使用できる。The composition of the present invention can be easily prepared by a known method generally used as a conventional resin composition preparation method. For example, after mixing each component to prepare pellets by kneading and extruding with an extruder, then, a method of molding, once preparing pellets having a different composition, and mixing the pellets in a predetermined amount and subjected to molding, after molding, Any method such as a method of obtaining a molded article having a desired composition, a method of directly charging one or more of each component into a molding machine, and the like can be used.
以下本発明を実施例について説明するが、本発明はこ
れらの実施例に限定されるものではない。Hereinafter, the present invention will be described with reference to examples, but the present invention is not limited to these examples.
実施例１〜８及び比較例１〜５ ポリアセタール樹脂〔ポリプラスチックス（株）製、
商品名「ジュラコン−M270」〕100重量部に表−１に示
す脂肪酸又はその金属塩で予め表面処理された炭酸カル
シウム又はタルクを表−１に示す割合で添加し、リボン
ブレダーで混合後、二軸押出機を用いて溶融混練し、ペ
レット状の組成物を調製した。次いでこのペレットから
射出成形機を用いて試験片を成形し、各種の性状を測定
した。比較のため、表面処理されていない炭酸カルシウ
ム又はタルクを添加したもの、予め脂肪酸で表面処理を
行うことなく単に炭酸カルシウムもしくはタルクと脂肪
酸を併用添加したもの、及び無機フィラーを添加しない
ものを同様に調製し評価した。Examples 1 to 8 and Comparative Examples 1 to 5 Polyacetal resin [manufactured by Polyplastics Co., Ltd.,
Trade name "Duracon-M270"] 100 parts by weight of calcium carbonate or talc surface-treated with the fatty acid or its metal salt shown in Table-1 at a ratio shown in Table-1 is added, and after mixing with a ribbon bladder, biaxial Melt kneading was performed using an extruder to prepare a pelletized composition. Then, test pieces were molded from the pellets using an injection molding machine, and various properties were measured. For comparison, the one to which calcium carbonate or talc not surface-treated was added, the one to which calcium carbonate or talc and a fatty acid were simply added together without surface treatment with a fatty acid in advance, and the one to which an inorganic filler was not added were similarly used. It was prepared and evaluated.
結果を表−１に示す。尚、測定方法は次の如くであ
る。The results are shown in Table 1. The measuring method is as follows.
光沢の測定 カーボンブラック0.5重量％配合により黒に着色し、
成形された試験片を用い、光沢計（スガ試験機社製MGV4
D型）により入射角45°、反射角45°で測定した。Gloss measurement Colored black by blending 0.5% by weight of carbon black,
Gloss meter (MGV4 manufactured by Suga Test Instruments Co., Ltd.)
D type) was measured at an incident angle of 45 ° and a reflection angle of 45 °.
引張特性 試験片を温度23℃、湿度50％の条件下に48時間放置
し、その雰囲気下で引張試験機（オリエンテック社製、
テンシロン）を用いてASTM D638に準じて測定した。Tensile properties The test piece is left for 48 hours under the conditions of temperature of 23 ° C and humidity of 50%, and the tensile tester (Orientec Co.,
(Tensilon) according to ASTM D638.
〔発明の効果〕 以上の説明及び実施例により明らかなように、粉粒状
無機充填材を特定の脂肪酸又はその金属塩で予め表面処
理した無機充填材を配合してなる本発明のポリアセター
ル樹脂組成物は、成形品表面の光沢を効果的に低減する
ことができ、しかも一般に粉粒状無機充填材配合時に見
られる伸度、靱性の低下もなく、バランスのとれた物性
を有するものである。このため、成形品による光の反射
が嫌われる自動車内装品、光学機械等の特定用途に対し
て好適に用いられる。 [Effects of the Invention] As is clear from the above description and Examples, the polyacetal resin composition of the present invention is prepared by blending a powdery inorganic filler with an inorganic filler which is surface-treated in advance with a specific fatty acid or a metal salt thereof. Has a well-balanced physical property, which can effectively reduce the gloss of the surface of the molded product, and does not have a decrease in elongation and toughness generally found when a powdery inorganic filler is compounded. Therefore, it can be suitably used for specific applications such as automobile interior parts and optical machines, where the reflection of light by molded products is disliked.
Claims (4)
00μｍ以下の粉粒状無機充填材１〜100重量部を配合し
てなるポリアセタール樹脂組成物において、該粉粒状無
機充填材が炭素数12以上の脂肪酸、及びその金属塩から
選ばれた１種又は２種以上の表面処理剤又は付着剤0.1
〜20重量％（対該粉粒状無機充填材）で予め表面処理さ
れていることを特徴とするポリアセタール樹脂組成物。1. An average particle size of 1 per 100 parts by weight of a polyacetal resin.
In a polyacetal resin composition containing 1 to 100 parts by weight of a granular inorganic filler of 00 μm or less, the granular inorganic filler is one or two selected from fatty acids having 12 or more carbon atoms and a metal salt thereof. One or more surface treatment agents or adhesives 0.1
A polyacetal resin composition, which has been previously surface-treated with 20 to 20% by weight (based on the powdery or granular inorganic filler).
族金属の酸化物、水酸化物、炭酸塩、珪酸塩、硫酸塩も
しくは二酸化珪素を主たる構成成分とするものである特
許請求の範囲第１項に記載のポリアセタール樹脂組成
物。2. The powdery or granular inorganic filler is a group II or III of the periodic table.
The polyacetal resin composition according to claim 1, which comprises a group metal oxide, hydroxide, carbonate, silicate, sulfate or silicon dioxide as a main constituent.
ルクである特許請求の範囲第１項に記載のポリアセター
ル樹脂組成物。3. The polyacetal resin composition according to claim 1, wherein the powdery inorganic filler is calcium carbonate or talc.
和脂肪酸である特許請求の範囲第１項〜第３項のいずれ
か１項に記載のポリアセタール樹脂組成物。4. The polyacetal resin composition according to any one of claims 1 to 3, wherein the surface treatment agent or the adhesive agent is a saturated fatty acid having 12 to 30 carbon atoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62329238A JPH0830137B2 (en) | 1987-12-25 | 1987-12-25 | Polyacetal resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62329238A JPH0830137B2 (en) | 1987-12-25 | 1987-12-25 | Polyacetal resin composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01170641A JPH01170641A (en) | 1989-07-05 |
| JPH0830137B2 true JPH0830137B2 (en) | 1996-03-27 |
Family
ID=18219193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62329238A Expired - Fee Related JPH0830137B2 (en) | 1987-12-25 | 1987-12-25 | Polyacetal resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0830137B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010270232A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
| JP2010270231A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
| JP2010270234A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04318051A (en) * | 1991-04-16 | 1992-11-09 | Polyplastics Co | Molding material and substrate |
| EP0519429B1 (en) * | 1991-06-21 | 1997-11-26 | Hoechst Aktiengesellschaft | Polyoxymethylene composition and its use |
| JP2561881B2 (en) * | 1992-02-26 | 1996-12-11 | 旭化成工業株式会社 | Polyacetal resin composition |
| DE19723592A1 (en) * | 1997-06-05 | 1998-12-17 | Hoechst Ag | Colored polyacetal molding compound with reduced emission of fission products |
| US6815479B1 (en) * | 1999-02-19 | 2004-11-09 | E. I. Du Pont De Nemours And Company | Toughened high modulus mineral filled polyoxymethylene polymers |
| DE60026536T2 (en) * | 2000-08-17 | 2007-01-18 | E.I. Dupont De Nemours And Co., Wilmington | REINFORCED POLYACETALE WITH HIGH MODULE |
| DE10135658B4 (en) * | 2001-07-21 | 2005-03-17 | Stranz, Andreas H., Dipl.-Ing.(FH) | Method and device for cleaning the surface of a rotating body |
| US6936651B2 (en) * | 2002-12-17 | 2005-08-30 | E. I. Du Pont De Nemours And Company | Compatibility improvement in crystalline thermoplastics with mineral fillers |
| KR100755985B1 (en) | 2004-01-21 | 2007-09-06 | 아사히 가세이 케미칼즈 가부시키가이샤 | Polyacetal resin composition |
| JP4730948B2 (en) * | 2005-08-03 | 2011-07-20 | 旭化成ケミカルズ株式会社 | Polyacetal resin composition |
| JP6762762B2 (en) * | 2016-05-30 | 2020-09-30 | 三菱エンジニアリングプラスチックス株式会社 | Polyacetal resin composition, its manufacturing method and molded product |
| JP2019006974A (en) * | 2017-06-20 | 2019-01-17 | 三菱エンジニアリングプラスチックス株式会社 | Polyacetal resin composition and molding |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59207943A (en) * | 1983-05-12 | 1984-11-26 | Sumitomo Electric Ind Ltd | Wear-resistant resin composition filled with ceramic |
| JPS60104152A (en) * | 1983-11-10 | 1985-06-08 | Mitsubishi Gas Chem Co Inc | Acetal resin composition |
-
1987
- 1987-12-25 JP JP62329238A patent/JPH0830137B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010270232A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
| JP2010270231A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
| JP2010270234A (en) * | 2009-05-22 | 2010-12-02 | Asahi Kasei Chemicals Corp | Polyacetal resin composition and method for producing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01170641A (en) | 1989-07-05 |
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