JP3467370B2 - Foam resin composition, foam and vibration damping sound absorbing member - Google Patents

Foam resin composition, foam and vibration damping sound absorbing member

Info

Publication number
JP3467370B2
JP3467370B2 JP24085296A JP24085296A JP3467370B2 JP 3467370 B2 JP3467370 B2 JP 3467370B2 JP 24085296 A JP24085296 A JP 24085296A JP 24085296 A JP24085296 A JP 24085296A JP 3467370 B2 JP3467370 B2 JP 3467370B2
Authority
JP
Japan
Prior art keywords
foam
polyolefin polyol
sound absorbing
water
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.)
Expired - Fee Related
Application number
JP24085296A
Other languages
Japanese (ja)
Other versions
JPH1087776A (en
Inventor
修治 伊香賀
伸輔 小山内
伸二 宮川
清美 西田
裕 安藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tokai Chemical Industries Ltd
Sumitomo Riko Co Ltd
Original Assignee
Tokai Chemical Industries Ltd
Sumitomo Riko Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tokai Chemical Industries Ltd, Sumitomo Riko Co Ltd filed Critical Tokai Chemical Industries Ltd
Priority to JP24085296A priority Critical patent/JP3467370B2/en
Publication of JPH1087776A publication Critical patent/JPH1087776A/en
Application granted granted Critical
Publication of JP3467370B2 publication Critical patent/JP3467370B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Polyurethanes Or Polyureas (AREA)

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、発泡樹脂組成物
と、その発泡樹脂組成物から形成された発泡体と、その
発泡樹脂組成物から形成され制振性及び吸音性に優れた
制振吸音部材に関する。
TECHNICAL FIELD The present invention relates to a foamed resin composition, a foam formed from the foamed resin composition, and a vibration-damping / sound-absorbing material formed from the foamed resin composition and having excellent vibration damping and sound absorbing properties. Regarding members.

【0002】[0002]

【従来の技術】例えば自動車においては、オイルパンカ
バーの内面に発泡ゴムからなる制振吸音部材を被覆する
ことが行われている。こうすることにより、エンジンか
らの振動を吸収してオイルパン表面を制振することがで
きる。またエンジンからの放射音を吸収して放射音を低
減することができ、静粛性を確保することができる。
2. Description of the Related Art In automobiles, for example, the inner surface of an oil pan cover is covered with a vibration damping and sound absorbing member made of foamed rubber. By doing so, the vibration from the engine can be absorbed and the surface of the oil pan can be damped. Further, the sound emitted from the engine can be absorbed to reduce the sound emitted, and the quietness can be ensured.

【0003】また、走行する車両による道路からの騒音
が、高架道路あるいは道路近傍の建造物の壁面に反射す
ることにより一層増幅されるのを防止する手段として、
高架道路の下面や建物の壁に吸音板を貼着することも提
案されている。ところで高い制振性をもつ材質として
は、粘弾性の高いゴムや樹脂が好ましく、高い吸音性を
得るには発泡体が好ましいことが従来より知られてい
る。そこで発泡ゴムや発泡ウレタンからなる制振吸音部
材が用いられているが、制振性と吸音性の両立を図るこ
とが困難であった。
Further, as a means for preventing noise from a road caused by a traveling vehicle from being further amplified by being reflected on a wall surface of an elevated road or a building near the road,
It has also been proposed to attach a sound absorbing plate to the lower surface of the elevated road or the wall of the building. By the way, it has been conventionally known that rubber or resin having high viscoelasticity is preferable as a material having high vibration damping property, and foam is preferable in order to obtain high sound absorbing property. Therefore, a vibration damping and sound absorbing member made of foamed rubber or urethane foam is used, but it has been difficult to achieve both vibration damping and sound absorbing properties.

【0004】また従来のポリエーテルポリオールを用い
た発泡ウレタンは、吸水率が高いために雨などに触れる
部分には用いられない。また耐熱性があまり優れていな
いため、オイルパンカバーなど高熱が作用する部位には
用いることが困難である。そのためオイルパンカバーに
用いられる制振吸音部材としては、吸水率が低く耐熱性
の高い発泡ゴムが用いられている。
Further, the conventional urethane foam using a polyether polyol cannot be used in a portion exposed to rain because of its high water absorption. In addition, since the heat resistance thereof is not so excellent, it is difficult to use it in a place where high heat acts such as an oil pan cover. Therefore, as the vibration damping and sound absorbing member used for the oil pan cover, foamed rubber having a low water absorption rate and a high heat resistance is used.

【0005】しかし発泡ゴムにおいても制振性と吸音性
を両立させることは困難であり、制振性と吸音性とが共
にある程度の性能となる発泡倍率の発泡ゴムが用いられ
ている。そのため制振性と吸音性のどちらも十分満足で
きるものではなく、両性能のさらなる向上が求められて
いる。なお、発泡ウレタンにアスファルトなどの撥水材
を含浸付着させた発泡体、ポリブタジエンと有機イソシ
アネートを反応発泡させた発泡体、あるいはヒマシ油、
ダイマー酸変成ポリオールと有機イソシアネートを反応
発泡させた発泡体が知られている。
However, even in foamed rubber, it is difficult to achieve both vibration damping and sound absorbing properties, and foaming rubber having a foaming ratio that provides both vibration damping and sound absorbing properties to some extent is used. Therefore, neither the vibration damping property nor the sound absorbing property is sufficiently satisfied, and further improvement of both performances is required. It should be noted that a foam obtained by impregnating and adhering a water repellent material such as asphalt to urethane foam, a foam obtained by reacting and foaming polybutadiene and an organic isocyanate, or castor oil,
A foam obtained by reacting and foaming a dimer acid-modified polyol and an organic isocyanate is known.

【0006】これらの発泡体は、いずれも吸水率は低い
ものの、発泡ウレタンにアスファルトなどの撥水材を含
浸付着させた発泡体は硬化時に肉痩せし、ポリブタジエ
ンと有機イソシアネートを反応発泡させた発泡体、ある
いはヒマシ油、ダイマー酸変成ポリオールと有機イソシ
アネートを反応発泡させた発泡体は、二重結合を有する
ため耐候性が悪いという欠点を有している。
Although all of these foams have a low water absorption, the foam obtained by impregnating and adhering a water repellent material such as asphalt to urethane foam becomes thin when cured, and foamed by reacting and foaming polybutadiene and organic isocyanate. A body, or a foamed body obtained by reacting and foaming castor oil, a dimer acid-modified polyol and an organic isocyanate has a drawback that it has poor weather resistance because it has a double bond.

【0007】そこで特開平2−298574号公報に
は、飽和炭化水素樹脂骨格を有するポリオールと有機イ
ソシアネートを、反応性シリコンオイルの存在下で反応
させた発泡シーリング材が開示されている。この発泡シ
ーリング材は、良好な止水性を示し、かつ肉痩せ現象が
生じず耐候性にも優れている。
Japanese Unexamined Patent Publication (Kokai) No. 2-298574 discloses a foam sealing material obtained by reacting a polyol having a saturated hydrocarbon resin skeleton with an organic isocyanate in the presence of reactive silicone oil. This foamed sealing material exhibits good waterproofness, does not cause a phenomenon of thinning, and is also excellent in weather resistance.

【0008】[0008]

【発明が解決しようとする課題】ところが上記公報に開
示された方法で発泡体を形成する場合には、発泡剤とし
ての水の分散性がきわめて悪く、均質な発泡体が形成で
きないという問題があった。デスパーなどで一時的に均
一に分散することはできても、型内への注入時あるいは
注入後にすぐ分離が始まり、得られる発泡体は不均質と
なってしまう。
However, when forming a foam by the method disclosed in the above publication, there is a problem that the dispersibility of water as a foaming agent is extremely poor and a uniform foam cannot be formed. It was Although it is possible to temporarily and uniformly disperse with a despar or the like, separation starts at the time of injection into the mold or immediately after the injection, and the obtained foam becomes heterogeneous.

【0009】本発明はこのような事情に鑑みてなされた
ものであり、高い制振性と高い吸音性及び低い吸水率を
確保できる均質な発泡体を形成し、その発泡体を用いる
ことで制振性と吸音性に優れ止水性にも優れた制振吸音
部材を提供することを目的とする。
The present invention has been made in view of the above circumstances, and a uniform foam capable of ensuring high vibration damping property, high sound absorbing property and low water absorption is formed, and the foam is used to control the foam. It is an object of the present invention to provide a vibration damping and sound absorbing member which is excellent in vibration damping property and sound absorbing property and is also excellent in water stopping property.

【0010】[0010]

【課題を解決するための手段】上記課題を解決する請求
項1に記載の発泡樹脂組成物の特徴は、飽和炭化水素樹
脂骨格を有するポリオレフィンポリオールと、発泡剤と
しての水と、鎖中に親水性基を有する脂肪酸エステルを
基本骨格とする界面活性剤とからなるA液と、有機ポリ
イソシアネートを主成分とするB液と、からなることに
ある。
The foaming resin composition according to claim 1 for solving the above-mentioned problems is characterized in that a polyolefin polyol having a saturated hydrocarbon resin skeleton, water as a foaming agent, and hydrophilicity in a chain. It is composed of a liquid A composed of a surfactant having a fatty acid ester having a functional group as a basic skeleton and a liquid B composed mainly of an organic polyisocyanate.

【0011】また請求項3に記載の発泡体の特徴は、上
記発泡樹脂組成物から形成された均質発泡組成であるこ
とを特徴とし、請求項5に記載の制振吸音部材の特徴
は、上記発泡樹脂組成物から形成された均質発泡組成の
発泡体から構成されたことにある。さらに請求項2,
4,6に記載の発明は、請求項1,3,5に記載の発明
においてポリオレフィンポリオールは側鎖をもち、かつ
分子末端に反応性の一級水酸基をもつことを特徴として
いる。
Further, the characteristic of the foam according to claim 3 is that it is a homogeneous foaming composition formed from the foamed resin composition, and the characteristic of the vibration damping and sound absorbing member according to claim 5 is that It is composed of a foam having a homogeneous foaming composition formed from the foaming resin composition. Further, claim 2
The inventions described in claims 4 and 6 are characterized in that, in the inventions described in claims 1, 3 and 5, the polyolefin polyol has a side chain and has a reactive primary hydroxyl group at the molecular end.

【0012】[0012]

【発明の実施の形態】従来の発泡ポリウレタンは、ポリ
エーテルポリオールを用いていたため、均一に発泡して
高い吸音特性は得られるものの、吸水率が大きいという
欠点があった。そこで水との親和性の低いポリオレフィ
ンポリオールを用いることが想起されたが、ポリオレフ
ィンポリオールは発泡剤である水とのなじみが悪く、発
泡成形するとセル崩壊により均質な発泡体が得られない
という不具合があることが明らかとなった。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Since conventional foamed polyurethane uses a polyether polyol, it has a drawback that it has a large water absorption rate although it foams uniformly and has a high sound absorbing property. Therefore, it was conceived to use a polyolefin polyol having a low affinity with water, but the polyolefin polyol is not well compatible with water as a foaming agent, and there is a problem that a homogeneous foam cannot be obtained due to cell collapse when foam-molding. It became clear that there is.

【0013】そして本願発明者らは、鋭意研究の結果、
特殊な組成とすることによりポリオレフィンポリオール
の均質発泡成形が可能となることを見出し、かつ得られ
た発泡体は高い制振性と吸音性とを兼ね備えていること
を発見して本発明を完成したものである。飽和炭化水素
樹脂骨格を有するポリオレフィンポリオールとは、例え
ば化1式に記載されたようなアタクチック・ブタジエン
オリゴマー、あるいは水添ポリブタジエンなどをいう。
このポリオレフィンポリオールは、例えばブタジエンを
アニオン・リビング重合することによって製造すること
ができる。
As a result of earnest research, the inventors of the present invention have found that
The present invention has been completed by discovering that the polyolefin foam can be homogeneously foam-molded by using a special composition, and that the obtained foam has both high vibration damping property and sound absorbing property. It is a thing. The polyolefin polyol having a saturated hydrocarbon resin skeleton means, for example, atactic butadiene oligomer as described in Chemical formula 1 or hydrogenated polybutadiene.
This polyolefin polyol can be produced, for example, by subjecting butadiene to anion-living polymerization.

【0014】[0014]

【化1】 [Chemical 1]

【0015】このポリオレフィンポリオールは、側鎖を
もち、かつ分子末端に反応性の一級水酸基をもつことが
望ましい。側鎖をもつことにより、形成されるフォーム
部材及び吸音部材の制振性が一層向上する。また、この
ポリオレフィンポリオールは、数平均分子量が1000
〜9000の範囲のものが好適である。数平均分子量が
1000より小さいと発泡体が固くて脆くなり、900
0より大きくなると粘度が高くなりすぎて発泡成形が困
難となる場合がある。特に望ましいのは、1500〜3
000の範囲である。数平均分子量を1000〜900
0の範囲とするには、水酸基価を10〜140とするの
がよい。
This polyolefin polyol preferably has a side chain and has a reactive primary hydroxyl group at the molecular end. By having the side chains, the vibration damping properties of the foam member and the sound absorbing member to be formed are further improved. This polyolefin polyol has a number average molecular weight of 1,000.
Those in the range of up to 9000 are preferable. If the number average molecular weight is less than 1000, the foam becomes hard and brittle,
If it is greater than 0, the viscosity may be too high and foam molding may be difficult. Particularly desirable is 1500 to 3
The range is 000. Number average molecular weight of 1,000 to 900
To make the range 0, the hydroxyl value is preferably 10 to 140.

【0016】有機ポリイソシアネートとしては、通常の
ポリエーテルポリオールを使用した発泡ウレタンに用い
られるものをそのまま利用することができる。このよう
な有機ポリイソシアネートとしては、MDI系、TDI
系、XDI系、HMDI系、IPDI系などが例示され
る。本発明者らは、ポリオレフィンポリオールに水を均
一に分散させるために、種々の界面活性剤を用いて実験
を行った。その結果、鎖中に親水性基を有する脂肪酸エ
ステルを基本骨格とする界面活性剤が特に好ましい結果
を与えることを見出したのである。この界面活性剤とし
ては、HLB値で10以上のものが好ましい。
As the organic polyisocyanate, those used for urethane foam using a normal polyether polyol can be used as they are. Examples of such organic polyisocyanates include MDI type and TDI type.
Examples include systems, XDI systems, HMDI systems, IPDI systems, and the like. The present inventors conducted experiments using various surfactants in order to uniformly disperse water in the polyolefin polyol. As a result, they have found that a surfactant having a basic skeleton of a fatty acid ester having a hydrophilic group in the chain gives particularly preferable results. As this surfactant, one having an HLB value of 10 or more is preferable.

【0017】脂肪酸エステルの鎖中に親水性基を導入す
るには、水酸基又は二重結合を有する脂肪酸エステルを
用い、その水酸基又は二重結合に親水性基を置換あるい
は付加して導入することができる。このような脂肪酸エ
ステルとしては、ヒマシ油が代表的に例示されるが、ヒ
マシ油に限られず落花生油、オリーブ油、魚油、鯨油な
どの脂肪酸エステルも用いることができる。
In order to introduce a hydrophilic group into the chain of a fatty acid ester, a fatty acid ester having a hydroxyl group or a double bond is used, and the hydrophilic group is substituted or added to the hydroxyl group or the double bond and introduced. it can. Typical examples of such fatty acid ester include castor oil, but not limited to castor oil, fatty acid esters such as peanut oil, olive oil, fish oil, and whale oil can also be used.

【0018】なかでも鎖中に水酸基をもつ脂肪酸エステ
ルを用いて親水性基を導入すれば、親水性基の置換が容
易となり水の均一分散が可能となる。また親水性基で置
換されなかった水酸基が残ったとしても、イソシアネー
トとの反応により発泡体の一部として一体化するため、
発泡体が一層疎水化し吸水率を大きく低減することがで
きる。
In particular, when the hydrophilic group is introduced by using a fatty acid ester having a hydroxyl group in the chain, the substitution of the hydrophilic group is facilitated and the water can be uniformly dispersed. Further, even if the hydroxyl group which is not substituted by the hydrophilic group remains, because it is integrated as a part of the foam by the reaction with isocyanate,
The foam can be made more hydrophobic and the water absorption can be greatly reduced.

【0019】ポリオレフィンポリオールと界面活性剤及
び有機イソシアネートは、NCO/OHが60〜150
となる範囲で混合されるのが望ましい。NCO/OHが
60未満の場合には架橋密度が低下し、得られる発泡体
及び制振吸音部材の制振性と吸音性が低下する。またN
CO/OHが150を超えると、発泡体が脆くなるとい
う不具合が生じる。特に望ましい範囲はNCO/OHが
80〜120の範囲である。
The polyolefin polyol, the surfactant and the organic isocyanate have an NCO / OH ratio of 60 to 150.
It is desirable that they be mixed within the range. When NCO / OH is less than 60, the crosslink density is lowered, and the vibration damping property and the sound absorbing property of the obtained foam and the vibration damping and sound absorbing member are lowered. Also N
When CO / OH exceeds 150, a problem that the foam becomes brittle occurs. A particularly desirable range is NCO / OH in the range of 80 to 120.

【0020】さらに界面活性剤は、使用する水100重
量部に対して20〜200重量部となるように添加する
ことが望ましい。界面活性剤が20重量部より少ないと
水の混合が不均一となり均質な発泡成形が困難となる。
また200重量部より多くなると、発泡体の特性が低下
する。なお、ポリオレフィンポリオールの粘度が高くて
発泡成形が困難な場合には、可塑剤を添加することも好
ましい。可塑剤により系の粘度を低下させることがで
き、常温における発泡成形を可能とすることができる。
この可塑剤としては、フタル酸エステル系、リン酸系な
ど公知の可塑剤を用いることができる。また、上記した
成分以外に、整泡剤、難燃剤などを用いることもでき
る。
Further, it is desirable to add the surfactant in an amount of 20 to 200 parts by weight based on 100 parts by weight of water used. If the amount of the surfactant is less than 20 parts by weight, the mixing of water will be non-uniform and uniform foam molding will be difficult.
On the other hand, if the amount is more than 200 parts by weight, the properties of the foam will be deteriorated. When the viscosity of the polyolefin polyol is high and foam molding is difficult, it is also preferable to add a plasticizer. The viscosity of the system can be reduced by the plasticizer, and foam molding can be performed at room temperature.
As the plasticizer, known plasticizers such as phthalic acid ester type and phosphoric acid type can be used. In addition to the above-mentioned components, a foam stabilizer, a flame retardant, etc. can be used.

【0021】本発明の発泡体及び制振吸音部材を製造す
るには、上記成分を混合することにより、ポリオレフィ
ンポリオールと有機イソシアネートとが反応するととも
に、水と有機イソシアネートとの反応により二酸化炭素
が発生して発泡するので、通常の発泡成形法を用いるこ
とができる。つまり、この反応を成形型内で行うことに
より、キャビティ内を充填した発泡成形体が形成され
る。なお、この反応は液状で行う必要があるが、ポリオ
レフィンポリオールの粘度が高い場合には、加熱により
粘度を下げて反応させてもよいし、上記したように可塑
剤で粘度を下げて反応させることもできる。
To produce the foam and the vibration-damping and sound-absorbing member of the present invention, by mixing the above components, the polyolefin polyol and the organic isocyanate react with each other, and carbon dioxide is generated by the reaction between water and the organic isocyanate. Then, foaming is performed, and thus a usual foaming molding method can be used. In other words, by performing this reaction in the molding die, a foamed molded body that fills the inside of the cavity is formed. It should be noted that this reaction needs to be performed in a liquid state, but when the viscosity of the polyolefin polyol is high, the viscosity may be lowered by heating to cause the reaction, or as described above, the viscosity may be lowered with a plasticizer to cause the reaction. You can also

【0022】このようにして製造された本発明の発泡体
及び制振吸音部材では、発泡セルが細かく通気抵抗が上
昇するため、比較的低周波数の音から高周波数の音まで
高い吸音特性が得られる。またポリオレフィンポリオー
ルに起因して疎水性であるため、吸水率が小さい。そし
て同じ発泡密度で比較した場合に、ポリエーテルポリオ
ールを用いた発泡ウレタンに比べてtanδ及び損失係
数が大きく制振性に優れ、かつ耐熱性にも優れている。
In the foam and vibration-damping sound-absorbing member of the present invention manufactured as described above, since the foam cells are finely divided and the ventilation resistance increases, a high sound-absorbing characteristic can be obtained from a relatively low-frequency sound to a high-frequency sound. To be Further, since it is hydrophobic due to the polyolefin polyol, the water absorption rate is small. When compared at the same foaming density, tan δ and loss coefficient are large and the vibration damping property is excellent, and also the heat resistance is excellent, as compared with urethane foam using a polyether polyol.

【0023】また本発明の制振吸音部材では、上記した
混合物が2〜30倍の発泡倍率で発泡したものであるこ
とが望ましい。発泡倍率が2倍より低いと吸音性がほと
んど得られず、30倍より高くなると制振性が急激に低
下する。
Further, in the vibration damping and sound absorbing member of the present invention, it is desirable that the above mixture is foamed at a foaming ratio of 2 to 30 times. When the expansion ratio is lower than 2 times, almost no sound absorption is obtained, and when the expansion ratio is higher than 30 times, the vibration damping property is rapidly lowered.

【0024】[0024]

【実施例】以下、試験例及び実施例により本発明を具体
的に説明する。 (試験例)
EXAMPLES The present invention will be specifically described below with reference to test examples and examples. (Test example)

【0025】[0025]

【化2】 [Chemical 2]

【0026】化2式に示す、側鎖をもつ飽和炭化水素系
ポリオレフィンポリオール(水酸基価48、数平均分子
量2000)100重量部と、水3.5重量部を混合
し、ヒマシ油の水酸基を親水性基である硫酸エステルナ
トリウム塩(SO4 Na)基で置換した界面活性剤(伊
藤製油(株)製)と、シリコーンオイル系整泡剤(「S
Z−1313」日本ユニカー(株)製)の2種類の界面
活性剤をそれぞれ3.5重量部攪拌混合した。
100 parts by weight of a saturated hydrocarbon polyolefin polyol having a side chain (a hydroxyl value of 48 and a number average molecular weight of 2000) represented by the formula 2 is mixed with 3.5 parts by weight of water to make the hydroxyl groups of castor oil hydrophilic. A surfactant (made by Ito Oil Co., Ltd.) substituted with a sulfate group sodium sulfate (SO 4 Na) group and a silicone oil type foam stabilizer (“S
Z-1313 "manufactured by Nippon Unicar Co., Ltd. was mixed with 3.5 parts by weight of two kinds of surfactants by stirring.

【0027】攪拌混合後の試料を所定時間放置し、その
後有機イソシアネート(Pure/Crud=80/2
0、NCO%=32.2、住友バイエルウレタン(株)
製)をNCOインデックス(100×NCO当量/OH
当量)が100となるように混合して、カップ発泡試験
を行った。そしてセル状態及び発泡性を評価し、結果を
表1に示す。
The sample after stirring and mixing was allowed to stand for a predetermined time, and then an organic isocyanate (Pure / Crud = 80/2) was used.
0, NCO% = 32.2, Sumitomo Bayer Urethane Co., Ltd.
Manufactured by NCO Index (100 x NCO equivalent / OH
A cup foaming test was carried out by mixing so that the (equivalent weight) was 100. Then, the cell state and the foamability were evaluated, and the results are shown in Table 1.

【0028】[0028]

【表1】 表1より、ヒマシ油変成の界面活性剤が特にセル状態が
安定し、フォームの安定性に優れていることがわかる。
[Table 1] From Table 1, it can be seen that the castor oil-modified surfactant has a particularly stable cell state and is excellent in foam stability.

【0029】(実施例1)前記化2式に示す、側鎖をも
つ飽和炭化水素系ポリオレフィンポリオール(水酸基価
48、数量平均分子量2000)100重量部と、脂肪
酸エステルであるヒマシ油の水酸基を親水性基である硫
酸エステルナトリウム塩(SO4 Na)基で置換した界
面活性剤3.5重量部と、水3.5重量部と、可塑剤
(DUP)40重量部と、難燃剤などが20重量部とを
攪拌混合し、それに有機イソシアネート(Pure/C
rud=80/20、NCO%=32.2、住友バイエ
ルウレタン(株)製)をNCOインデックス(100×
NCO当量/OH当量)が100となるように混合し
た。
Example 1 100 parts by weight of a saturated hydrocarbon polyolefin polyol having a side chain (a hydroxyl value of 48 and a number average molecular weight of 2000) represented by the above chemical formula 2 and a hydroxyl group of castor oil, which is a fatty acid ester, were made hydrophilic. 20 parts by weight of a surfactant substituted with a sulfuric acid ester sodium salt (SO 4 Na) group as a functional group, 3.5 parts by weight of water, 40 parts by weight of a plasticizer (DUP) and a flame retardant. Stir-mix with 1 part by weight, and add organic isocyanate (Pure / C
rud = 80/20, NCO% = 32.2, Sumitomo Bayer Urethane Co., Ltd. NCO index (100 ×
The mixture was mixed so that NCO equivalent / OH equivalent) was 100.

【0030】そして、混合物の所定量を直ちに所定の金
型内に注入し、発泡成形して所定形状の試験片を作製し
た。得られた試験片のフォーム密度は0.12である。
得られた試験片について、定法により引張強度と破断伸
びを測定した。また試験片を175℃で24時間加熱し
た後、同様に引張強度と破断伸びを測定し、耐熱劣化後
の引張強度と破断伸びとした。
Then, a predetermined amount of the mixture was immediately poured into a predetermined mold and foam-molded to prepare a test piece having a predetermined shape. The foam density of the obtained test piece is 0.12.
The tensile strength and the elongation at break of the obtained test piece were measured by the usual methods. After heating the test piece at 175 ° C. for 24 hours, the tensile strength and the elongation at break were measured in the same manner to obtain the tensile strength and the elongation at break after heat deterioration.

【0031】また、試験片を室温にて水中に24時間浸
漬し、増加重量から吸水率を求めた。さらに、厚さ30
mmの試験片を用い、垂直入射吸音測定法(JISA1
405)に従って、500Hz、1000Hz、200
0Hz及び5000Hzの音波の吸音率を測定した。
The test piece was immersed in water at room temperature for 24 hours, and the water absorption rate was calculated from the increased weight. Furthermore, thickness 30
Measurement method for normal incidence sound absorption using a mm test piece (JIS A1
405), 500 Hz, 1000 Hz, 200
The sound absorption coefficient of sound waves of 0 Hz and 5000 Hz was measured.

【0032】また短冊状の鋼板に両面テープで厚さ10
mmの試験片を貼り、片持ち梁状に保持して損失係数を
求めた。さらに粘弾性スペクトロメータ(「レオスペク
トラDVE4」(株)レオロジー製)により25℃にお
けるtanδを求めた。これらの測定結果を表2にまと
めて示す。 (実施例2)界面活性剤の添加量を0.5重量部とした
こと以外は実施例1と同様にして試験片を作製し、同様
に各種物性を測定した結果を表2に示す。
A strip-shaped steel plate with a double-sided tape having a thickness of 10
A mm test piece was attached and held in a cantilever shape to obtain a loss coefficient. Further, tan δ at 25 ° C. was obtained using a viscoelastic spectrometer (“Rheospectra DVE4” manufactured by Rheology Co., Ltd.). The results of these measurements are summarized in Table 2. (Example 2) A test piece was prepared in the same manner as in Example 1 except that the amount of the surfactant added was 0.5 part by weight, and various physical properties were similarly measured.

【0033】(実施例3)ポリオールとして、実施例1
と同様の飽和炭化水素系ポリオレフィンポリオールを7
0重量部と、脂肪酸エステル系ポリオール(水酸基価5
3、数平均分子量2000、東亜合成(株)製)30重
量部とを用いたこと以外は実施例1と同様にして試験片
を作製し、同様に各種物性を測定した結果を表2に示
す。
Example 3 As a polyol, Example 1 was used.
The same saturated hydrocarbon polyolefin polyol as
0 parts by weight and fatty acid ester-based polyol (hydroxyl value 5
3, a number average molecular weight of 2,000, and 30 parts by weight of Toagosei Co., Ltd. were used to prepare test pieces in the same manner as in Example 1, and various physical properties were similarly measured. .

【0034】(実施例4)可塑剤を20重量部とし、界
面活性剤を2.5重量部、水を2.5重量部用いたこと
以外は実施例1と同様にして試験片を作製し、同様に各
種物性を測定した結果を表2に示す。 (実施例5)可塑剤を用いず、混合物を60℃に加熱し
て金型に注入したこと以外は実施例1と同様にして試験
片を作製し、同様に各種物性を測定した結果を表2に示
す。
Example 4 A test piece was prepared in the same manner as in Example 1 except that the plasticizer was 20 parts by weight, the surfactant was 2.5 parts by weight, and the water was 2.5 parts by weight. Table 2 shows the results obtained by similarly measuring various physical properties. Example 5 A test piece was prepared in the same manner as in Example 1 except that the mixture was heated to 60 ° C. and poured into a mold without using a plasticizer, and the results of various physical properties were measured. 2 shows.

【0035】(実施例6)飽和炭化水素系ポリオレフィ
ンポリオールに代えて水添ポリブタジエン(水酸基価4
7、数平均分子量2100、日本曹達(株)製)を10
0重量部用いたこと以外は実施例1と同様にして試験片
を作製し、同様に各種物性を測定した結果を表2に示
す。
Example 6 Hydrogenated polybutadiene (having a hydroxyl value of 4) was used in place of the saturated hydrocarbon polyolefin polyol.
7, number average molecular weight 2100, manufactured by Nippon Soda Co., Ltd. 10
A test piece was prepared in the same manner as in Example 1 except that 0 part by weight was used, and various physical properties were similarly measured.

【0036】(比較例1)飽和炭化水素系ポリオレフィ
ンポリオールに代えて、ポリエーテルポリオール(水酸
基価28、数平均分子量6000、「スミフェン306
3」住友バイエルウレタン(株)製)を100重量部用
い、界面活性剤としてシリコーンオイル系整泡剤(「S
Z−1313」日本ユニカー(株)製)を0.5重量
部、水2.0重量部を用い、可塑剤を用いなかったこと
以外は実施例1と同様にして試験片を作製し、同様に各
種物性を測定した結果を表2に示す。
(Comparative Example 1) Instead of the saturated hydrocarbon polyolefin polyol, a polyether polyol (hydroxyl value 28, number average molecular weight 6000, "Sumiphen 306") was used.
3 "Sumitomo Bayer Urethane Co., Ltd. 100 parts by weight, and a silicone oil type foam stabilizer (" S
Z-1313 "manufactured by Nippon Unicar Co., Ltd.) was used in the same manner as in Example 1 except that 0.5 parts by weight of water and 2.0 parts by weight of water were used, and a plasticizer was not used. Table 2 shows the results of measuring various physical properties.

【0037】(比較例2)飽和炭化水素系ポリオレフィ
ンポリオールに代えて、不飽和炭化水素系ポリオレフィ
ンポリオール(水酸基価47、数平均分子量2800、
出光石油化学(株)製)を100重量部用いたこと以外
は実施例1と同様にして試験片を作製し、同様に各種物
性を測定した結果を表2に示す。
Comparative Example 2 Instead of the saturated hydrocarbon polyolefin polyol, an unsaturated hydrocarbon polyolefin polyol (hydroxyl value 47, number average molecular weight 2800,
Table 2 shows the results of measuring various physical properties similarly prepared in the same manner as in Example 1 except that 100 parts by weight of Idemitsu Petrochemical Co., Ltd. was used.

【0038】(比較例3)界面活性剤を用いなかったこ
と以外は実施例1と同様にして試験片を作製し、同様に
各種物性を測定した結果を表2に示す。 (比較例4)ヒマシ油系の界面活性剤に代えて、シリコ
ーンオイル系整泡剤(「SZ−1313」日本ユニカー
(株)製)を3重量部用いたこと以外は実施例1と同様
にして試験片を作製し、同様に各種物性を測定した結果
を表2に示す。
Comparative Example 3 A test piece was prepared in the same manner as in Example 1 except that the surfactant was not used, and various physical properties were measured in the same manner as shown in Table 2. (Comparative Example 4) In the same manner as in Example 1 except that 3 parts by weight of a silicone oil type foam stabilizer ("SZ-1313" manufactured by Nippon Unicar Co., Ltd.) was used in place of the castor oil type surfactant. Table 2 shows the results of preparing various test pieces and measuring various physical properties in the same manner.

【0039】(評価)(Evaluation)

【0040】[0040]

【表2】 [Table 2]

【0041】表2より、従来のウレタンフォームである
比較例1では、ある程度の制振性は示すものの、吸水率
が高く水と接触する部分には用いられないことがわか
る。また高周波数の音の吸音率は高いものの、低周波数
の音の吸音率が低いこともわかる。また不飽和炭化水素
系ポリオレフィンポリオールを用いた比較例2では、吸
水率は低いものの、耐熱性に劣り、tanδも低い。そ
して界面活性剤を用いなかった比較例3、及び界面活性
剤がシリコーン系の比較例4では、水が均一に分散しな
かったためセルが崩壊し、発泡体を形成することが困難
であった。
It can be seen from Table 2 that Comparative Example 1, which is a conventional urethane foam, has a high degree of water absorption but cannot be used in a portion that comes into contact with water, although it exhibits some damping properties. It can also be seen that the sound absorption coefficient of high frequency sound is high, but the sound absorption coefficient of low frequency sound is low. Further, in Comparative Example 2 using the unsaturated hydrocarbon-based polyolefin polyol, the water absorption is low, but the heat resistance is poor and the tan δ is also low. In Comparative Example 3 in which no surfactant was used and Comparative Example 4 in which the surfactant was silicone-based, water was not uniformly dispersed, so that the cells collapsed and it was difficult to form a foam.

【0042】一方、本発明の発泡体及び制振吸音部材で
ある各実施例の試験片は、吸水性が低く耐熱性に優れ、
低周波数から高周波数まで安定した吸音率を示し、かつ
tanδも大きく制振性にも優れていることが明らかで
ある。 (実施例7)上記試験結果に基づき、実施例4と同様の
組成の発泡体層をもつオイルパンカバーを製造した。図
1に示すこのオイルパンカバーは、ガラス繊維で強化さ
れたポリプロピレンからなる基体1と、基体1のオイル
パンに対向する表面に一体的に形成された発泡体層2と
から構成され、発泡体層2が実施例4と同様の組成の混
合物から形成されている。
On the other hand, the test pieces of each of the examples of the foam and the vibration damping and sound absorbing member of the present invention have low water absorption and excellent heat resistance,
It is clear that the sound absorption coefficient is stable from low frequency to high frequency, tan δ is large, and the vibration damping property is excellent. (Example 7) Based on the above test results, an oil pan cover having a foam layer having the same composition as in Example 4 was produced. This oil pan cover shown in FIG. 1 comprises a base body 1 made of polypropylene reinforced with glass fibers, and a foam layer 2 integrally formed on the surface of the base body 1 facing the oil pan. Layer 2 is formed from a mixture having the same composition as in Example 4.

【0043】このオイルパンカバーは、先ずプレス成形
により基体1を形成し、基体1を成形型内に配置して発
泡体層2を一体成形することで製造された。オイルパン
カバーとして必要な条件は、耐熱性に優れていること、
吸水性が低いこと、tanδが0.128以上の制振性
を示すことであるが、本実施例のオイルパンカバーはこ
の全ての条件を満足している。さらに、本実施例のオイ
ルパンカバーは、実施例4と同様に低周波数から高周波
数まで安定した吸音率を示し、吸音特性に優れているの
で、エンジンからの騒音が外部に漏れるのを確実に防止
することができる。
This oil pan cover was manufactured by first forming the base body 1 by press molding, placing the base body 1 in a molding die, and integrally molding the foam layer 2. The conditions required for the oil pan cover are excellent heat resistance,
The oil pan cover of this example satisfies all of these conditions, although it has low water absorption and exhibits damping with a tan δ of 0.128 or more. Furthermore, the oil pan cover of this embodiment exhibits a stable sound absorption coefficient from low frequency to high frequency as in the case of the fourth embodiment and has excellent sound absorption characteristics, so that noise from the engine is surely leaked to the outside. Can be prevented.

【0044】(実施例8)上記実施例では、基体1を型
内に配置して発泡体層2を形成したが、発泡体のみを形
成することもできる。この場合、発泡体を板状に形成す
れば、両面テープなどを用いて所望の場所に貼着するこ
とができ、吸音部材として種々の分野に容易に利用する
ことができる。もちろん、必要に応じて吸音性能を阻害
しないような表面材を発泡体に積層して吸音部材とし、
それを所望の場所に配置することもできる。
(Embodiment 8) In the above embodiment, the foam layer 2 is formed by disposing the substrate 1 in the mold, but it is also possible to form only the foam. In this case, if the foam is formed into a plate shape, it can be attached to a desired place by using a double-sided tape or the like, and can be easily used as a sound absorbing member in various fields. Of course, if necessary, a surface material that does not impair the sound absorbing performance is laminated on the foam to form a sound absorbing member,
It can be placed in any desired location.

【0045】例えば高架道路の下面や、高架道路に沿う
建造物の壁面などにこのような吸音部材を配置すれば、
道路を走行する車両からの音が反射するのを防止するこ
とができ、沿道騒音を低減することが可能となる。また
この吸音部材は、吸水率が小さいので止水性に優れ、こ
のような外装部材として用いても何ら問題がない。
For example, if such a sound absorbing member is arranged on the lower surface of an elevated road or the wall surface of a structure along the elevated road,
It is possible to prevent the sound from the vehicle traveling on the road from being reflected, and it is possible to reduce roadside noise. Further, since this sound absorbing member has a small water absorption rate, it is excellent in water stopping property, and there is no problem even if it is used as such an exterior member.

【0046】[0046]

【発明の効果】すなわち本発明の発泡樹脂組成物によれ
ば、ポリオレフィンポリオールを用いて水と均一に混合
することができるので、均質な発泡体を容易にかつ安定
して形成することができる。また本発明の発泡体及び制
振吸音部材によれば、耐熱性と止水性に優れるととも
に、高い制振性と高い吸音性を両立して有しているの
で、各種分野に広く利用することができる。
That is, according to the foamed resin composition of the present invention, the polyolefin polyol can be uniformly mixed with water, so that a homogeneous foam can be easily and stably formed. Further, according to the foam and the vibration-damping and sound-absorbing member of the present invention, it has excellent heat resistance and water-stopping property, and has both high vibration-damping property and high sound-absorbing property, so that it can be widely used in various fields. it can.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例の発泡体をもつオイルパンカ
バーをオイルパンに装着した状態で示す断面図である。
FIG. 1 is a cross-sectional view showing an oil pan cover having a foam according to an embodiment of the present invention attached to an oil pan.

【符号の説明】[Explanation of symbols]

1:基体 2:発泡体層 1: substrate 2: foam layer

───────────────────────────────────────────────────── フロントページの続き (72)発明者 宮川 伸二 愛知県小牧市大字北外山字哥津3600番地 東海ゴム工業株式会社内 (72)発明者 西田 清美 愛知県小牧市大字北外山字下小管4203番 地の1東海化成工業株式会社内 (72)発明者 安藤 裕 愛知県小牧市大字北外山字下小管4203番 地の1東海化成工業株式会社内 (56)参考文献 特開 昭63−27583(JP,A) 特開 昭58−162626(JP,A) (58)調査した分野(Int.Cl.7,DB名) C08G 18/00 - 18/87 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Miyagawa 3600 Amigazu, Kita Sotoyama, Komaki City, Aichi Prefecture Tokai Rubber Industry Co., Ltd. No. 1 Tokai Kasei Kogyo Co., Ltd. (72) Inventor Yutaka Ando Komaki City, Aichi Oita Kita Toyama Yamashita Komitsukan 4203 No. 1 Tokai Kasei Kogyo Co., Ltd. (56) Reference JP-A-63-27583 ( JP, A) JP 58-162626 (JP, A) (58) Fields investigated (Int. Cl. 7 , DB name) C08G 18 / 00-18 / 87

Claims (6)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】 飽和炭化水素樹脂骨格を有するポリオレ
フィンポリオールと、発泡剤としての水と、鎖中に親水
性基を有する脂肪酸エステルを基本骨格とする界面活性
剤とからなるA液と、 有機ポリイソシアネートを主成分とするB液と、からな
ることを特徴とする発泡樹脂組成物。
1. A liquid comprising a polyolefin polyol having a saturated hydrocarbon resin skeleton, water as a foaming agent, and a surfactant having a fatty acid ester having a hydrophilic group in the chain as a basic skeleton, and an organic poly. A foamed resin composition comprising liquid B containing isocyanate as a main component.
【請求項2】 前記ポリオレフィンポリオールは側鎖を
もち、かつ分子末端に反応性の一級水酸基をもつことを
特徴とする請求項1記載の発泡樹脂組成物。
2. The foamed resin composition according to claim 1, wherein the polyolefin polyol has a side chain and has a reactive primary hydroxyl group at the molecular end.
【請求項3】 飽和炭化水素樹脂骨格を有するポリオレ
フィンポリオールと、発泡剤としての水と、有機ポリイ
ソシアネートとよりなる混合物を、鎖中に親水性基を有
する脂肪酸エステルを基本骨格とする界面活性剤の存在
下で反応させてなる均質発泡組成であることを特徴とす
る発泡体。
3. A surfactant comprising, as a basic skeleton, a mixture of a polyolefin polyol having a saturated hydrocarbon resin skeleton, water as a foaming agent, and an organic polyisocyanate and having a fatty acid ester having a hydrophilic group in the chain as a basic skeleton. A foam having a homogeneous foam composition obtained by reacting in the presence of
【請求項4】 前記ポリオレフィンポリオールは側鎖を
もち、かつ分子末端に反応性の一級水酸基をもつことを
特徴とする請求項3記載の発泡体。
4. The foam according to claim 3, wherein the polyolefin polyol has a side chain and has a reactive primary hydroxyl group at the molecular end.
【請求項5】 飽和炭化水素樹脂骨格を有するポリオレ
フィンポリオールと、発泡剤としての水と、有機ポリイ
ソシアネートとからなる混合物を、鎖中に親水性基を有
する脂肪酸エステルを基本骨格とする界面活性剤の存在
下で反応させてなる均質発泡組成の発泡体から構成され
たことを特徴とする制振吸音部材。
5. A surfactant comprising, as a basic skeleton, a mixture of a polyolefin polyol having a saturated hydrocarbon resin skeleton, water as a foaming agent, and an organic polyisocyanate, having a fatty acid ester having a hydrophilic group in the chain as a basic skeleton. A vibration-damping and sound-absorbing member, which is composed of a foam having a homogeneous foaming composition which is made to react in the presence of.
【請求項6】 前記ポリオレフィンポリオールは側鎖を
もち、かつ分子末端に反応性の一級水酸基をもつことを
特徴とする請求項5記載の制振吸音部材。
6. The vibration damping and sound absorbing member according to claim 5, wherein the polyolefin polyol has a side chain and has a reactive primary hydroxyl group at a molecular end.
JP24085296A 1996-09-11 1996-09-11 Foam resin composition, foam and vibration damping sound absorbing member Expired - Fee Related JP3467370B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11993708B2 (en) 2018-04-10 2024-05-28 Stepan Company Polyol blends and rigid foams with improved low-temperature R-values

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11993708B2 (en) 2018-04-10 2024-05-28 Stepan Company Polyol blends and rigid foams with improved low-temperature R-values

Also Published As

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JPH1087776A (en) 1998-04-07

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