JPH04154854A - Polypropylene resin composition - Google Patents
Polypropylene resin compositionInfo
- Publication number
- JPH04154854A JPH04154854A JP28104890A JP28104890A JPH04154854A JP H04154854 A JPH04154854 A JP H04154854A JP 28104890 A JP28104890 A JP 28104890A JP 28104890 A JP28104890 A JP 28104890A JP H04154854 A JPH04154854 A JP H04154854A
- Authority
- JP
- Japan
- Prior art keywords
- polypropylene resin
- resin composition
- thermoplastic elastomer
- styrene
- vibration damping
- 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.)
- Pending
Links
- -1 Polypropylene Polymers 0.000 title claims abstract description 45
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 44
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 43
- 239000011342 resin composition Substances 0.000 title claims abstract description 16
- 239000011347 resin Substances 0.000 claims abstract description 27
- 229920005989 resin Polymers 0.000 claims abstract description 27
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 14
- 229920001195 polyisoprene Polymers 0.000 claims abstract description 6
- 229920000642 polymer Polymers 0.000 claims abstract description 6
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 5
- VSKJLJHPAFKHBX-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical group CC(=C)C=C.C=CC1=CC=CC=C1.C=CC1=CC=CC=C1 VSKJLJHPAFKHBX-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000013016 damping Methods 0.000 abstract description 14
- 239000000203 mixture Substances 0.000 abstract description 7
- 239000005977 Ethylene Substances 0.000 abstract description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 abstract description 3
- 229920001400 block copolymer Polymers 0.000 abstract description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract description 2
- 229920005604 random copolymer Polymers 0.000 abstract description 2
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000011256 inorganic filler Substances 0.000 description 3
- 229910003475 inorganic filler Inorganic materials 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 229910000019 calcium carbonate Inorganic materials 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000454 talc Substances 0.000 description 2
- 229910052623 talc Inorganic materials 0.000 description 2
- ROGIWVXWXZRRMZ-UHFFFAOYSA-N 2-methylbuta-1,3-diene;styrene Chemical group CC(=C)C=C.C=CC1=CC=CC=C1 ROGIWVXWXZRRMZ-UHFFFAOYSA-N 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Natural products C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 235000021189 garnishes Nutrition 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002667 nucleating agent Substances 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920005629 polypropylene homopolymer Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、優れた制振性能を有するポリプロピレン樹脂
組成物に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a polypropylene resin composition having excellent vibration damping performance.
〔従来技術］
近年、自動車に関しては、燃費向上、軽量化という社会
的要請に応えて、その構成部品の一部が金属からゾラス
チ、りに変換されつつあり、その実用化も進んでいる。[Prior Art] In recent years, in response to social demands for improved fuel economy and weight reduction, some of the component parts of automobiles are being converted from metal to Zolast, and their practical use is also progressing.
プラスチック材料のうちポリプロピレン樹脂は。Polypropylene resin is a plastic material.
名種の物性バランスがとれた材料であり、かつ比較的安
価であるため自動車の内装用、外装用の部品に大量に使
用されている。そして、特にタルク１ガラス繊維、炭酸
カルシウム等の無機充填剤及びこれらの混合物を、ポリ
プロピレン樹脂に充填した強化ポリプロピレン樹脂は１
強度、耐熱性に優れているため、タイミングへルトカハ
ー、ブロワーケース、クーラーハウジング、ダクト等に
使用されている。It is a material with well-balanced physical properties and is relatively inexpensive, so it is used in large quantities for interior and exterior parts of automobiles. In particular, reinforced polypropylene resin made by filling polypropylene resin with talc 1 glass fiber, inorganic fillers such as calcium carbonate, and mixtures thereof is 1
Because of its excellent strength and heat resistance, it is used for timing helmets, blower cases, cooler housings, ducts, etc.
一方、最近では自動車に対して、軽量化の他に。On the other hand, recently, in addition to reducing the weight of automobiles.
車室内の快適環境化を図るため、騒音の低減が強□く望
まれている。In order to create a more comfortable environment inside the vehicle, there is a strong desire to reduce noise.
騒音の対策法としては制振、遮音、防振、吸音等があり
、空調機器の騒音が固体伝搬音の寄与が大きいか、或い
は空気透過音の寄与が大きいかによって対策法が異なる
。そごで、材料置換によって騒音低減を図るためには、
材料の制振性能を向」ニさせることが必要である。Countermeasures against noise include vibration damping, sound insulation, vibration proofing, sound absorption, etc., and countermeasures differ depending on whether the noise of air conditioning equipment is largely contributed by solid-borne sound or air-transmitted sound. So, in order to reduce noise by replacing materials,
It is necessary to improve the vibration damping performance of materials.
従来、制振性能を向上させたポリプロピレン樹脂組成物
としては、特開昭６２−４３４４３号公報に記載された
発明がある。Conventionally, as a polypropylene resin composition with improved vibration damping performance, there is an invention described in JP-A-62-43443.
しかしながら５上記ポリプロピレン樹脂組成物は２例え
ば常温〜８０°Ｃという比較的広い温度範囲において使
用する際には、その制振性能は未だ不十分である。However, when the above-mentioned polypropylene resin composition is used in a relatively wide temperature range of, for example, room temperature to 80°C, its vibration damping performance is still insufficient.
本発明は、上記問題点に鑑み鋭意研究を重ねた結果なさ
れたもので、低温から高温に至るまでの広い温度範囲で
優れた制振性能を発揮するポリプロピレン樹脂組成物を
提供しようとするものである。The present invention was made as a result of intensive research in view of the above problems, and aims to provide a polypropylene resin composition that exhibits excellent vibration damping performance over a wide temperature range from low to high temperatures. be.
本発明は、ポリプロピレン樹脂５０〜９５重量％と熱可
塑性エラストマー５〜５０重量％とを混合してり、かつ
上記熱可塑性エラストマーは、ビニル構造のポリイソプ
レンブロックを有するスチレン−イソプレン−スチレン
構造のブロックポリマーを主体とするものであることを
特徴とするポリプロピレン樹脂組成物にある。In the present invention, 50 to 95% by weight of a polypropylene resin and 5 to 50% by weight of a thermoplastic elastomer are mixed, and the thermoplastic elastomer is a block having a styrene-isoprene-styrene structure having a polyisoprene block having a vinyl structure. A polypropylene resin composition characterized in that it is mainly composed of a polymer.
本発明において最も注目すべきことは、ポリプロピレン
樹脂と、上記ポリイソプレンブロックを有する特定の熱
可塑性エラストマーとを上記割合に混合したポリプロピ
レン樹脂組成物としたことである。The most noteworthy feature of the present invention is that a polypropylene resin composition is prepared by mixing a polypropylene resin and the specific thermoplastic elastomer having the above polyisoprene block in the above ratio.
上記ポリプロピレン樹脂としては、結晶性ポリプロピレ
ン樹脂を用いることが好ましい。結晶性ポリプロピレン
樹脂としては、いわゆるポリプロピレン樹脂と変性ポリ
プロピレン樹脂とがある。As the polypropylene resin, it is preferable to use a crystalline polypropylene resin. Crystalline polypropylene resins include so-called polypropylene resins and modified polypropylene resins.
前者のポリプロピレン樹脂としては、ホモポリプロピレ
ンの他にプロピレン−エチレンランダム共重合体（エチ
レン含量２０重量％以下）、プロピレン−エチレンブロ
ック共重合体（エチレン含量２０重量％以下）及びこれ
らの混合物が用いられる。また、後者の変性ポリプロピ
レン樹脂は。As the former polypropylene resin, in addition to homopolypropylene, propylene-ethylene random copolymers (ethylene content of 20% by weight or less), propylene-ethylene block copolymers (ethylene content of 20% by weight or less), and mixtures thereof are used. . Also, the latter modified polypropylene resin.
ポリプロピレン樹脂と不飽和カルボン酸またはその誘導
体とを、有機過酸化物の存在下で変性したものである。Polypropylene resin and unsaturated carboxylic acid or its derivatives are modified in the presence of an organic peroxide.
しかしで、結晶性ポリプロピレン樹脂としては。However, as a crystalline polypropylene resin.
上記ポリプロピレン樹脂と変性ポリプロピレン樹脂とを
混合して用いることが好ましい。この際１変性ポリプロ
ピレン樹脂は、樹脂成分中に１〜２０％（重量比以下同
じ）含まれることが好ましい。It is preferable to use a mixture of the above polypropylene resin and modified polypropylene resin. In this case, it is preferable that the 1-modified polypropylene resin is contained in the resin component in an amount of 1 to 20% (the same applies below the weight ratio).
また、結晶性ポリプロピレン樹脂のメルトフローインデ
ックスは５〜５０が好ましく、これらが５未満の場合に
は成形加工性及び成形品の外観が悪くなり、５０を越え
る場合は耐衝撃性の低下が著しくなる。In addition, the melt flow index of the crystalline polypropylene resin is preferably 5 to 50; if it is less than 5, the moldability and appearance of the molded product will be poor, and if it exceeds 50, the impact resistance will be significantly reduced. .
また、上記熱可塑性エラストマーは、上記のごとく、ビ
ニル構造のポリイソプレンブロックを有するスチレン−
イソプレン−スチレン構造（ＳＩＳ構造）のブロックポ
リマーを主体とするものである。該ブロックポリマーは
、下記の一般式で示され、ポリイソプレンブロックがビ
ニル構造である。Further, as mentioned above, the thermoplastic elastomer is a styrene-based material having a polyisoprene block with a vinyl structure.
It is mainly composed of a block polymer having an isoprene-styrene structure (SIS structure). The block polymer is represented by the following general formula, and the polyisoprene block has a vinyl structure.
そして、上記「主体」とは、上記ブロックポリマーが熱
可塑性エラストマー中に６０％以上含有されていること
をいう。また、上記熱可塑性エラストマーは、熱可塑性
を有すると共にゴム弾性を有し、各種プラスチックとの
相客性を有する上記ポリプロピレン樹脂は、５０〜９５
％含有させる。５０％未満では機械的強度、耐熱性が低
下し、一方９５％を越えると制振性能が低下する。The term "mainly" means that the block polymer is contained in the thermoplastic elastomer in an amount of 60% or more. Further, the thermoplastic elastomer has thermoplasticity and rubber elasticity, and the polypropylene resin which has compatibility with various plastics has a 50 to 95
%. If it is less than 50%, mechanical strength and heat resistance will decrease, while if it exceeds 95%, vibration damping performance will decrease.
また、上記熱可塑性エラストマーは、５〜５０％含有さ
せる。５％未満では、制振性能が低く。Further, the thermoplastic elastomer is contained in an amount of 5 to 50%. If it is less than 5%, the damping performance is low.
一方５０％を越えると耐熱性及び機械的強度が低下する
おそれがある。On the other hand, if it exceeds 50%, heat resistance and mechanical strength may decrease.
更に、ポリプロピレン樹脂は６０〜９０％、上記熱可塑
性エラストマーは１０〜４０％とすることが好ましい。Furthermore, it is preferable that the polypropylene resin be 60 to 90% and the thermoplastic elastomer be 10 to 40%.
これにより、制振性能９機械的強度のバランスがとれた
材料が得られる。As a result, a material with well-balanced vibration damping performance and mechanical strength can be obtained.
次に、上記ポリプロピレン樹脂組成物は、−軸押出機、
二軸押出機、ニーダ−、ブラヘンダー。Next, the polypropylene resin composition is processed using a -screw extruder,
Twin screw extruder, kneader, brahender.
バンバリーミキサ−等の通常の混練機を用いて製造する
ことができる。通常は、各配合成分を所定の割合にてタ
ンブラ−式ブレンダー、ヘンシェルミキサー、リボンミ
キサー等により混合し、その後押出機等で混練してペレ
ット状のコンパウンドとなし、その後タイミングへルト
カハー、ニアブロワ−ケース、ヒータハウジング等の所
望する成形品の形状に成形する。It can be produced using a common kneader such as a Banbury mixer. Usually, each component is mixed in a predetermined ratio using a tumbler blender, Henschel mixer, ribbon mixer, etc., and then kneaded using an extruder etc. to form a pellet-like compound, which is then transferred to a timing belt, near blower case, etc. , molded into the shape of a desired molded product such as a heater housing.
また７本発明においては、前記成分以外に、無機充填剤
、酸化防止剤、紫外線吸収剤、滑剤、帯電防止剤、核剤
、顔料５難燃剤、増量剤５加工助剤等の添加剤を混合し
ても良い。上記無機充填剤としては、タルク、炭酸カル
シウム、ガラス繊維などがある。In addition to the above-mentioned components, in the present invention, additives such as inorganic fillers, antioxidants, ultraviolet absorbers, lubricants, antistatic agents, nucleating agents, pigments, flame retardants, extenders and processing aids are mixed. You may do so. Examples of the above-mentioned inorganic fillers include talc, calcium carbonate, and glass fiber.
本発明のポリプロピレン樹脂組成物は、自動車のエンジ
ンルーム内の各種部品、自動車用の内装品及び外装品、
或いはその他の電気部品１機械部品に使用することがで
きる。また、特に自動車のエンジンルーム内において振
動騒音が発生する部品７例えばタイミングへルトカハー
、ギヤカバー。The polypropylene resin composition of the present invention can be used for various parts in the engine compartment of an automobile, interior and exterior parts for automobiles,
Or it can be used for other electrical parts or mechanical parts. Parts that generate vibration and noise, especially in the engine room of automobiles, such as timing helmets and gear covers.
エアクリーナーケース等、或いはエヤブロワ−ケース、
ダクＩ−等の空調機器などに好適である。Air cleaner case, etc. or air blower case,
Suitable for air conditioning equipment such as Dak I-.
また、きしみ音等の騒音が発生するおそれのある部品２
例えばインスツルメントパネル、ガーニッシュ類、クラ
スター類、コンソールボックスなどにも好適である。In addition, parts 2 that may generate noise such as squeaks
For example, it is suitable for instrument panels, garnishes, clusters, console boxes, etc.
本発明は、前記組成によりポリプロピレン樹脂組成物を
構成している。The present invention constitutes a polypropylene resin composition with the above composition.
そのため９本発明のポリプロピレン樹脂組成物は、従来
問題とされていた常温〜８０°Ｃにおける 。Therefore, the polypropylene resin composition of the present invention has a high temperature resistance at room temperature to 80°C, which has been a problem in the past.
制振性能に関して、優れた性能（例えば、損失係数が０
．０５以上）を有する。そして、上記制振性能は特に常
温付近において優れている。In terms of vibration damping performance, it has excellent performance (for example, loss coefficient is 0).
．． 05 or higher). The vibration damping performance is particularly excellent near room temperature.
以上のごとく１本発明によれば、低温から高温に至るの
までの広い温度範囲において優れた制振性能を発揮する
ポリプロピレン樹脂組成物を提供することができる。As described above, according to the present invention, it is possible to provide a polypropylene resin composition that exhibits excellent vibration damping performance in a wide temperature range from low temperatures to high temperatures.
［実施例］
以下２本発明のポリプロピレン樹脂組成物にかかる実施
例及び比較例につき説明する。[Examples] Two examples and comparative examples of the polypropylene resin composition of the present invention will be described below.
諸物性の測定は、以下の方法により行った。また、各側
における成分の配合割合、試験片の測定結果は各表に示
した。The various physical properties were measured by the following methods. In addition, the mixing ratio of the components on each side and the measurement results of the test pieces are shown in each table.
上記配合−１合は２重量％で示す。The above formulation-1 is expressed as 2% by weight.
（ａ） 曲げ弾性率（ｋｇｆ／ｃ漬）ＡＳＴＭ Ｄ
７９０により行った。(a) Flexural modulus (kgf/c) ASTM D
790.
（ｂ） アイゾツト衝撃値（ｋｇ ｆ ｃ＋ｎ／ｃｍ
）ＡＳＴＭ Ｄ２５６により行った。(b) Izot impact value (kg f c + n/cm
) Performed according to ASTM D256.
（Ｃ） 熱変形温度（°Ｃ）
ＡＳＴＭ Ｄ６４Ｂに従い、４．６ｋｇ／ｃイ荷重に
より行った。(C) Heat distortion temperature (°C) Testing was carried out under a load of 4.6 kg/cm in accordance with ASTM D64B.
（ｄ）損失係数
縦、横がともに１５０ｍｍ、厚さ３ｒＭｌの正方形の平
板を射出成形にて作製し、室温から１００°Ｃまで昇温
可能な恒温槽中で平板の中心部を０．１Ｇで加振させ、
伝達関数を測定した。そして、１次共振点から半値幅法
にて損失係数を計算した。(d) Loss coefficient A square flat plate with both length and width of 150 mm and thickness of 3 rMl was produced by injection molding, and the center of the flat plate was heated at 0.1 G in a constant temperature bath that could be heated from room temperature to 100°C. Vibrate,
The transfer function was measured. Then, the loss coefficient was calculated from the first-order resonance point using the half-width method.
また、実施例、比較例に掲げる試験片の作製は。In addition, the preparation of test pieces listed in Examples and Comparative Examples.
所定割合に混合した組成物を長さＬ／直径Ｄり２７ｍｍ
、３０ｍｍの異方向回転２軸押出機で溶融混練しペレッ
トとした。次いで、このペレットを８０°Ｃ１３時間乾
燥した後、５０Ｚ射出成形機にて成形し、試験片を作製
した。The composition was mixed in a predetermined ratio and the length L/diameter D was 27 mm.
The mixture was melt-kneaded using a 30 mm twin-screw extruder rotating in different directions to form pellets. Next, this pellet was dried at 80° C. for 13 hours and then molded using a 50Z injection molding machine to prepare a test piece.
次に、各実施例１〜４．比較例につき１表１を用いて説
明する。なお、下記において、ＰＰは結晶性ポリプロピ
レン樹脂を、ＶＳは前記熱可塑性エラストマーを示す。Next, each of Examples 1 to 4. A comparative example will be explained using Table 1. In addition, in the following, PP shows a crystalline polypropylene resin, and VS shows the said thermoplastic elastomer.
上記熱可塑性エラストマーとしては、クラレ■のＶＳ−
１を用いた。As the thermoplastic elastomer mentioned above, Kuraray's VS-
1 was used.
表１より知られるごとく１本発明にかかる実施例１〜４
は、いずれも高い損失係数を示していることが分る。一
方、■Ｓを添加していない比較例は、損失係数が低いこ
とが分る。As can be seen from Table 1, Examples 1 to 4 according to the present invention
It can be seen that both have high loss coefficients. On the other hand, it can be seen that the loss coefficient of the comparative example in which ■S is not added is low.
また、実施例１〜４は、比較例１に比して、特に低温域
において高い制振性能を有することが分る。Furthermore, it can be seen that Examples 1 to 4 have higher vibration damping performance than Comparative Example 1, especially in the low temperature range.
Claims (1)
トマー５〜５０重量％とを混合してなり、かつ上記熱可
塑性エラストマーは、ビニル構造のポリイソプレンブロ
ックを有するスチレン−イソプレン−スチレン構造のブ
ロックポリマーを主体とするものであることを特徴とす
るポリプロピレン樹脂組成物。It is made by mixing 50 to 95% by weight of a polypropylene resin and 5 to 50% by weight of a thermoplastic elastomer, and the thermoplastic elastomer is mainly composed of a block polymer having a styrene-isoprene-styrene structure having a polyisoprene block having a vinyl structure. A polypropylene resin composition characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28104890A JPH04154854A (en) | 1990-10-18 | 1990-10-18 | Polypropylene resin composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28104890A JPH04154854A (en) | 1990-10-18 | 1990-10-18 | Polypropylene resin composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04154854A true JPH04154854A (en) | 1992-05-27 |
Family
ID=17633579
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28104890A Pending JPH04154854A (en) | 1990-10-18 | 1990-10-18 | Polypropylene resin composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04154854A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639808A (en) * | 1994-10-07 | 1997-06-17 | Minnesota Mining And Manufacturing Company | Flame retardant thermosettable resin compositions |
| US6576699B2 (en) | 1997-09-03 | 2003-06-10 | Toyoda Gosei Co., Ltd. | Damping resin composition and molded article using the same |
| US6646205B2 (en) | 2000-12-12 | 2003-11-11 | Sumitomo Wiring Systems, Ltd. | Electrical wire having a resin composition covering |
-
1990
- 1990-10-18 JP JP28104890A patent/JPH04154854A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5639808A (en) * | 1994-10-07 | 1997-06-17 | Minnesota Mining And Manufacturing Company | Flame retardant thermosettable resin compositions |
| US6576699B2 (en) | 1997-09-03 | 2003-06-10 | Toyoda Gosei Co., Ltd. | Damping resin composition and molded article using the same |
| US6646205B2 (en) | 2000-12-12 | 2003-11-11 | Sumitomo Wiring Systems, Ltd. | Electrical wire having a resin composition covering |
| US6756440B2 (en) | 2000-12-12 | 2004-06-29 | Sumitomo Wiring Systems, Ltd. | Fire resistant resin composition and electrical wire having fire resistant covering |
| US6809140B2 (en) | 2000-12-12 | 2004-10-26 | Sumitomo Wiring Systems, Ltd. | Fire resistant resin composition and electrical wire having fire resistant covering |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104530573A (en) | Low-gloss low-warpage soft-touch-feeling vehicle polypropylene composition as well as preparation method and application thereof | |
| JP2571964B2 (en) | Reinforced polypropylene resin composition | |
| JPS62115048A (en) | Polyolefin resin composition | |
| CA2144586A1 (en) | Reformed polypropylene resin composition and a method of preparing the same | |
| JPH0115526B2 (en) | ||
| JPH04154854A (en) | Polypropylene resin composition | |
| KR100387648B1 (en) | Composition of polypropylene resin | |
| JP2812550B2 (en) | Polypropylene resin composition | |
| JP4334630B2 (en) | Damping resin composition | |
| JP3077297B2 (en) | Intake system synthetic resin parts for internal combustion engines | |
| KR100302256B1 (en) | Polypropylene composition for timing belt cover of car | |
| US20020151642A1 (en) | Damping resin composition and molded article using the same | |
| JPH0559234A (en) | Vibration-damping resin | |
| JP2635908B2 (en) | Wood filler reinforced resin material | |
| JPH05112726A (en) | Resin composition for material of acoustic equipment | |
| JPH04202249A (en) | Polypropylene resin composition | |
| JPH04248856A (en) | Polypropylene resin composition | |
| JPH05255537A (en) | Resin composition for acoustic material | |
| JPH04323238A (en) | Propylene polymer composition | |
| JPH01263137A (en) | Reinforced polypropylene resin composition | |
| JP3409355B2 (en) | Polypropylene resin composition | |
| JPH0794135B2 (en) | Method for manufacturing reinforced polypropylene resin molded product | |
| JP2631385B2 (en) | Timing belt cover | |
| JP3028700B2 (en) | Polyethylene polymer alloy | |
| CN114276644A (en) | Green ABS (acrylonitrile-butadiene-styrene) material with damping function and preparation method thereof |