JP2002089253A - Holding seal material of catalytic converter for exhaust emission control - Google Patents
Holding seal material of catalytic converter for exhaust emission controlInfo
- Publication number
- JP2002089253A JP2002089253A JP2000275361A JP2000275361A JP2002089253A JP 2002089253 A JP2002089253 A JP 2002089253A JP 2000275361 A JP2000275361 A JP 2000275361A JP 2000275361 A JP2000275361 A JP 2000275361A JP 2002089253 A JP2002089253 A JP 2002089253A
- Authority
- JP
- Japan
- Prior art keywords
- catalytic converter
- exhaust gas
- holding
- sealing material
- seal material
- 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
Abstract
Description
【０００１】[0001]
【技術分野】本発明は，自動車の排ガスを浄化するため
に用いられる排ガス浄化用触媒コンバーターの保持シー
ル材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalytic converter used for purifying exhaust gas from automobiles.
【０００２】[0002]
【従来技術】一般的に，自動車の排気管には，排ガスを
浄化するための排ガス浄化用触媒コンバーターが装備さ
れている。排ガス浄化用触媒コンバーターは，排ガスを
浄化する触媒を担持した触媒保持体と，その外方を覆う
金属シェルと，触媒保持体と金属シェルとの間に介設さ
れた保持シール材とからなる。保持シール材は，自動車
の走行中などに触媒保持体が外周の金属シェルと当接す
ることによる破損を防ぎ，また金属シェルと触媒保持体
との間から排ガスがリークすることを防ぐために用いら
れている。2. Description of the Related Art Generally, an exhaust pipe of an automobile is equipped with an exhaust gas purifying catalytic converter for purifying exhaust gas. The catalytic converter for purifying exhaust gas comprises a catalyst holding body carrying a catalyst for purifying exhaust gas, a metal shell covering the outside thereof, and a holding sealing material interposed between the catalyst holding body and the metal shell. The holding sealing material is used to prevent the catalyst holder from being damaged due to contact with the outer metal shell during driving of an automobile and to prevent exhaust gas from leaking between the metal shell and the catalyst holder. I have.
【０００３】保持シール材は，バーミキュライトとセラ
ミックファイバー等との混合物である熱膨張性保持シー
ル材が主であるが，近年，排ガス規制強化により排ガス
温度が著しく上昇しているため，従来の熱膨張性保持シ
ール材では，耐熱性が不足する。そこで，近年，結晶質
アルミナ繊維のマット状物からなる無膨張性保持シール
材が用いられつつある。[0003] The holding seal material is mainly a heat-expandable holding seal material which is a mixture of vermiculite and ceramic fiber. However, in recent years, the exhaust gas temperature has been significantly increased due to the tightening of exhaust gas regulations. The heat-resistant seal material has insufficient heat resistance. Therefore, in recent years, a non-expandable holding seal material made of a mat-like crystalline alumina fiber has been used.
【０００４】保持シール材を用いて排ガス浄化用触媒コ
ンバーターを製造する方法としては，外周の金属シェル
を予め二分割しておいて，触媒保持体に保持シール材を
巻き付けたものを挟み込む方法（キャニング）が一般的
である。また，作業性向上のため，金属シェルを最初か
らパイプ状にしておき，保持シール材を触媒保持体に巻
き付けたものを，金属シェル内に圧入する方法や，ステ
ンレス鋼板を断面形状がＣ字形状またはＵ字形状の筒状
に成型して金属シェルとし，その中に，保持シール材を
巻き付けた触媒保持体を装着し，その後金属シェルを締
めつけてから溶接接合する方法などが実施されている。[0004] As a method of manufacturing a catalytic converter for purifying exhaust gas using a holding seal material, a method in which an outer metal shell is divided into two parts in advance, and a catalyst holding body wound with the holding seal material is sandwiched (canning). ) Is common. In order to improve workability, the metal shell is made into a pipe shape from the beginning, and the holding sealing material is wound around the catalyst holder, and then pressed into the metal shell. Alternatively, a method of forming a metal shell by molding into a U-shaped cylindrical shape, mounting a catalyst holder around which a holding sealing material is wound, and then welding and joining the metal shell after tightening the metal shell has been implemented.
【０００５】結晶質アルミナ繊維のマット状物などの無
膨張性保持シール材は，嵩高いため，触媒保持体への組
み付け性を改善するため，特開昭５７−１４６９５４
号，特開昭５９−１２６０２３号などに開示されている
ように，有機フィルムを用いて真空パックする方法や，
無機繊維のマット状物に，有機分を塗布，含浸させるこ
とにより，マット状物の厚みを小さくする試みがなされ
ている。含浸させる有機分としては，一般的にはアクリ
ル系エマルジョンラテックスなどが用いられる。[0005] A non-expandable holding sealing material such as a mat-like material of crystalline alumina fiber is bulky, and is disclosed in Japanese Patent Application Laid-Open No. 57-146954 in order to improve the assemblability to the catalyst holding body.
Japanese Patent Application Laid-Open No. 59-126023, etc., a method of vacuum packing using an organic film,
Attempts have been made to reduce the thickness of the mat-like material by applying and impregnating an organic component to the mat-like material of inorganic fibers. As the organic component to be impregnated, generally, an acrylic emulsion latex or the like is used.
【０００６】[0006]
【解決しようとする課題】しかしながら，アクリル系エ
マルジョンラテックスなどは燃焼温度が３５０℃以上で
あるため，触媒保持体側の有機分は高温に晒され，短時
間で焼失するが，その反対側は焼失しにくく異臭が発生
する。その理由は，保持シール材は，それ自体が断熱材
であるため，触媒保持体からの熱が伝播しにくいため，
有機バインダーが不完全燃焼を起こし，異臭が発生して
しまう。However, since acrylic emulsion latex and the like have a combustion temperature of 350 ° C. or higher, the organic components on the catalyst support side are exposed to high temperatures and burn out in a short time, but the other side burns down. Difficult smell is generated. The reason is that the holding seal material itself is a heat insulating material, so the heat from the catalyst holding body is difficult to propagate.
The organic binder causes incomplete combustion and produces an odor.
【０００７】本発明はかかる従来の問題点に鑑み，組み
付け性がよく，保持シール材からの異臭を抑制した排ガ
ス浄化用触媒コンバーターの保持シール材を提供しよう
とするものである。The present invention has been made in view of the above-mentioned conventional problems, and has as its object to provide a holding seal material of an exhaust gas purifying catalytic converter which has good assemblability and suppresses an odor from the holding seal material.
【０００８】[0008]
【課題の解決手段】請求項１の発明は，触媒保持体と金
属シェルとの間に組み付ける，排ガス浄化用触媒コンバ
ーターの保持シール材において，該保持シール材は，組
み付け後の充填密度が０．１〜０．６ｇ／ｃｍ３の範囲
内になるように調整されている耐熱無機繊維のマット状
物と，該マット状物に対して０．１〜２０重量％の有機
分と，該有機分に対する重量比が０．０１〜３の酸素供
給物質とを有することを特徴とする排ガス浄化用触媒コ
ンバーターの保持シール材である。According to a first aspect of the present invention, there is provided a holding seal material for a catalytic converter for purifying exhaust gas, which is assembled between a catalyst holding body and a metal shell. A mat of heat-resistant inorganic fibers adjusted to fall within the range of 1 to 0.6 g / cm 3 , an organic content of 0.1 to 20% by weight based on the mat, And an oxygen supply material having a weight ratio of 0.01 to 3 with respect to the weight of the catalytic converter for exhaust gas purification.
【０００９】耐熱無機繊維のマット状物は一般に嵩高い
ため，本発明のように有機分を添加することにより厚み
が低減し，組み付け性が向上する。また，繊維の飛散を
抑制でき，製造中の作業性が向上する。またマット状物
には酸素供給物質が添加されているため，２００℃以下
の低温でも有機分が焼失する。そのため，保持シール材
からの異臭の発生を抑制できる。Since the mat-like material of heat-resistant inorganic fibers is generally bulky, the thickness is reduced and the assembling property is improved by adding an organic component as in the present invention. In addition, scattering of fibers can be suppressed, and workability during manufacturing is improved. Further, since the oxygen-supplying substance is added to the mat-like material, organic components are burned off even at a low temperature of 200 ° C. or less. Therefore, generation of an unusual odor from the holding sealing material can be suppressed.
【００１０】保持シール材を触媒保持体とともに金属シ
ェル内に組み付けたときのマット状物の充填密度は，
０．１〜０．６ｇ／ｃｍ３である。０．１ｇ／ｃｍ３で
未満の場合には，振動などによる触媒保持体のズレ防止
に必要な保持力を確保することが困難となるおそれがあ
り，０．６ｇ／ｃｍ３を超える場合には，過剰面圧によ
り繊維が折損してしまい，保持力の低下及び耐風蝕性の
低下につながる。When the holding sealing material is assembled together with the catalyst holding body in the metal shell, the packing density of the mat-like material is as follows:
Is a 0.1~0.6g / cm 3. If it is less than 0.1 g / cm 3 , it may be difficult to secure a holding force necessary for preventing displacement of the catalyst holder due to vibration or the like, and if it exceeds 0.6 g / cm 3 , In addition, the fibers are broken due to excessive surface pressure, leading to a decrease in holding power and a decrease in wind erosion resistance.
【００１１】上記有機分は，耐熱無機繊維のマット状物
に対して０．１〜２０重量％含まれている。これによ
り，繊維の飛散を防止し，金属シェル内への組み付け性
が向上する。一方，０．１重量％未満の場合には，耐熱
無機繊維が飛散し，組み付け作業環境が悪化する恐れが
ある。一方，含有量が２０重量％を超える場合には，保
持シール材の柔軟性が損なわれ，触媒保持体に巻きつけ
にくくなる。また，保持シール材から発生する燃焼ガス
が増加し，環境に与える影響が大きくなる。The organic component is contained in an amount of 0.1 to 20% by weight based on the heat-resistant inorganic fiber mat. Thereby, scattering of the fiber is prevented, and the assembling property in the metal shell is improved. On the other hand, if it is less than 0.1% by weight, the heat-resistant inorganic fibers may be scattered, and the assembling work environment may be deteriorated. On the other hand, if the content exceeds 20% by weight, the flexibility of the holding sealing material is impaired, and it becomes difficult to wind the holding sealing material around the catalyst holding body. Further, the amount of combustion gas generated from the holding sealing material increases, and the influence on the environment increases.
【００１２】保持シール材の中の酸素供給物質の含有量
は，有機分に対する重量比で，０．０１〜３である。
０．０１未満の場合には，有機分が早期焼失するに必要
な酸素を充分供給できず，早期に焼失する目的が達成さ
れなくなるおそれがある。３を超える場合には，有機分
添加による本発明の効果を損い，過剰な酸素供給により
異常発熱のおそれがある。The content of the oxygen-supplying substance in the holding sealing material is 0.01 to 3 in terms of the weight ratio to the organic component.
If it is less than 0.01, oxygen required for early burning out of organic components cannot be supplied sufficiently, and the purpose of early burning out may not be achieved. If it exceeds 3, the effect of the present invention due to the addition of an organic component is impaired, and an excessive supply of oxygen may cause abnormal heat generation.
【００１３】マット状物に添着される有機分は，請求項
４の発明のように，上記有機分は，アクリル系エマルジ
ョンラテックスまたは／及びポリビニルアルコールを含
むことが好ましい。これにより，組み付け時に耐熱無機
繊維の厚み低減及び飛散を防止することができる。It is preferable that the organic component attached to the mat-like material includes an acrylic emulsion latex and / or polyvinyl alcohol. This can reduce the thickness of the heat-resistant inorganic fiber and prevent the heat-resistant inorganic fiber from scattering at the time of assembly.
【００１４】請求項２の発明のように，マット状物に添
加される酸素供給物質は，過酸化物からなることが好ま
しい。これにより，比較的低温で早期に有機分を焼失さ
せ，本願の課題を解決するための最適な材料であるとい
える。As in the second aspect of the present invention, it is preferable that the oxygen supply material added to the mat-like material is made of a peroxide. Accordingly, it can be said that this is an optimal material for quickly burning out organic components at a relatively low temperature and solving the problem of the present invention.
【００１５】請求項３の発明のように，上記過酸化物
は，過酸化ベンゾイル（以下，ＢＰＯともいう。），ク
メンヒドロキシパーオキサイド（以下，ＣＨＰともい
う。），アゾビスイソブチロニトリル（以下，ＡＩＢＮ
ともいう。），ブチルパーオキシジメチルヘキサン（以
下，ＤＨＢＰともいう。）及びジクミルパーオキサイド
（以下，ＤＣＰともいう。）の群から選ばれる１種また
は２種以上からなることが好ましい。これらは，特に酸
素濃度が低い排ガス浄化用触媒コンバーターにおいて酸
素を充分に供給し，有機分の焼失，酸化分解を促進させ
る。According to the third aspect of the present invention, the peroxide is benzoyl peroxide (hereinafter also referred to as BPO), cumene hydroxy peroxide (hereinafter also referred to as CHP), azobisisobutyronitrile (hereinafter referred to as CHP). Hereafter, AIBN
Also called. ), Butylperoxydimethylhexane (hereinafter, also referred to as DHBP) and dicumyl peroxide (hereinafter, also referred to as DCP). They supply a sufficient amount of oxygen, particularly in an exhaust gas purifying catalytic converter having a low oxygen concentration, and promote the burning and oxidative decomposition of organic components.
【００１６】耐熱無機繊維のマット状物への有機分及び
酸素供給物質の添着量は，焼失ガスを低減し環境問題へ
配慮する観点から極力少なくする必要があるが，組み付
け性及び作業上の繊維飛散防止のためには，最小限量が
必要となる。耐熱無機繊維への有機分及び酸素供給物質
の添着方法は，たとえば，エマルジョン状態の有機分と
酸素供給物質の溶液をマット状物へスプレーするか，ま
たは上記溶液にディップする方法がある。添着後は，乾
燥を行うことが好ましい。有機分によりマット状物の厚
みを調整するには，たとえば，圧縮状態で乾燥する。It is necessary to minimize the amount of the organic component and the oxygen-supplying substance attached to the mat-like material of the heat-resistant inorganic fiber from the viewpoint of reducing burnout gas and considering environmental issues. A minimum amount is required to prevent scattering. As a method of applying the organic component and the oxygen supply substance to the heat-resistant inorganic fiber, for example, there is a method in which a solution of the organic substance and the oxygen supply substance in an emulsion state is sprayed on a mat-like material or dipped in the above solution. After the attachment, drying is preferably performed. In order to adjust the thickness of the mat-like material according to the organic content, for example, it is dried in a compressed state.
【００１７】請求項５の発明のように，上記保持シール
材の耐熱無機繊維は，結晶質アルミナ繊維，アルミナ−
シリカ繊維，シリカ繊維，ガラスファイバー，及びロッ
クウールの群から選ばれる１種または２種以上からなる
ことが好ましい。これにより，保持シール材の耐久性が
向上する。高温環境下で使用される排ガス浄化用触媒コ
ンバーターや，振動，背圧が高く保持力が必要な触媒コ
ンバーターについては，マット状物に対する面圧が大き
く耐熱性が高い結晶質アルミナファーバーが望ましい。According to a fifth aspect of the present invention, the heat-resistant inorganic fiber of the holding sealing material is made of a crystalline alumina fiber or an alumina fiber.
It is preferable to be composed of one or more selected from the group consisting of silica fiber, silica fiber, glass fiber and rock wool. Thereby, the durability of the holding sealing material is improved. For a catalytic converter for purifying exhaust gas used in a high-temperature environment or a catalytic converter that requires high holding force with high vibration and back pressure, a crystalline alumina fiber having a large surface pressure against a mat-like material and high heat resistance is desirable.
【００１８】触媒保持体としては，たとえば，コージェ
ライト，アルミナ，炭化珪素などの担体に触媒を担持さ
せたものである。触媒保持体の形状は，たとえば，ハニ
カム状である。担持されている触媒は，排ガス浄化作用
を持つものであれば特に限定されないが，たとえば，白
金などを用いる。金属シェルは，たとえば，断面が楕円
形，円形のパイプ状，または二分割されたシェル型形
状，もしくは断面形状がＣ字型，Ｕ字型などの筒状であ
る。金属シェルは，たとえば，ステンレス鋼などの耐熱
性金属を用いることができる。The catalyst holder is, for example, a catalyst carrier carried on a carrier such as cordierite, alumina, or silicon carbide. The shape of the catalyst holder is, for example, a honeycomb shape. The supported catalyst is not particularly limited as long as it has an exhaust gas purifying function. For example, platinum is used. The metal shell has, for example, an elliptical cross section, a circular pipe shape, or a two-part shell shape, or a cylindrical shape having a C-shaped or U-shaped cross-section. For the metal shell, for example, a heat-resistant metal such as stainless steel can be used.
【００１９】[0019]
【発明の実施の形態】実施形態例１ 本発明の排ガス浄化用触媒コンバーターの保持シール材
について，図１〜図２を用いて説明する。本例の保持シ
ール材は，図１に示すごとく，触媒保持体３と金属シェ
ル２との間に配置する，排ガス浄化用触媒コンバーター
５の保持シール材１である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 A holding sealing material for a catalytic converter for purifying exhaust gas according to the present invention will be described with reference to FIGS. As shown in FIG. 1, the holding sealing material of the present embodiment is a holding sealing material 1 of a catalytic converter 5 for purifying exhaust gas, which is disposed between a catalyst holding body 3 and a metal shell 2.
【００２０】保持シール材は，セラミックス繊維のマッ
ト状物に４重量％の有機分と酸素供給物質とを添着させ
たものである。セラミックス繊維のマット状物は，組み
付け前の充填密度が０．０５ｇ／ｃｍ３で厚みが２５ｍ
ｍの結晶質アルミナ繊維のマット状物である。有機分
は，アクリル系ラテックスである。酸素供給物質は，Ｂ
ＰＯであり，保持シール材中の含有量は，有機分重量比
に対して０．５である。The holding sealing material is obtained by adhering a 4% by weight organic component and an oxygen supply substance to a mat-like material of ceramic fibers. The mat of ceramic fibers has a packing density of 0.05 g / cm 3 and a thickness of 25 m before assembly.
m is a mat-like material of crystalline alumina fibers. The organic component is an acrylic latex. Oxygen supplier is B
PO, and the content in the holding sealing material is 0.5 with respect to the organic content weight ratio.
【００２１】図１に示すごとく，触媒保持体３は，セラ
ミックの一種であるコージェライトモノリスであり，排
ガスの排気成分を浄化し得る白金などの触媒が担持され
ている。触媒担持体３の外形は１３０ｍｍであり，長さ
は１００ｍｍである。金属シェル２はＳＵＳ３０４から
なり，その形状は，外径１４１ｍｍ，板厚１．５ｍｍの
円筒径状である。排ガス浄化用触媒コンバータ５は，エ
ンジン９の排気管９１の途中に設けられている。As shown in FIG. 1, the catalyst holder 3 is a cordierite monolith, which is a kind of ceramic, and carries a catalyst such as platinum capable of purifying exhaust components of exhaust gas. The outer shape of the catalyst carrier 3 is 130 mm, and the length is 100 mm. The metal shell 2 is made of SUS304 and has a cylindrical shape with an outer diameter of 141 mm and a plate thickness of 1.5 mm. The exhaust gas purifying catalytic converter 5 is provided in the exhaust pipe 91 of the engine 9.
【００２２】触媒保持体３は，排気系の上流側及び下流
側の双方が開口した多数のセル３１の集合体からなるハ
ニカム構造体である。触媒保持体３のセル３１に排ガス
を通過させると，セル壁に担持されている触媒の作用に
より，排ガス成分が浄化される。The catalyst holder 3 is a honeycomb structure composed of an aggregate of a large number of cells 31 that are open on both the upstream and downstream sides of the exhaust system. When the exhaust gas passes through the cell 31 of the catalyst holder 3, the exhaust gas component is purified by the action of the catalyst carried on the cell wall.
【００２３】次に，本例の排ガス浄化用触媒コンバータ
の製造方法について説明する。結晶質アルミナ繊維のマ
ット状物（厚み２５ｍｍ，充填密度０．０５ｇ／ｃ
ｍ ３）にアクリル系ラテックスとＢＰＯとを含浸させ
て，保持シール材を得る。アクリル系ラテックスの含浸
量は，マット状物に対して４重量％とし，ＢＰＯの含浸
量は，アクリル系ラテックスの重量比に対して０．５と
する。アクリル系エマルジョン及びＢＰＯの含浸は，こ
れらを水で希釈した水溶液を作成し，耐熱無機繊維マッ
トにスプレーまたはディッピングして行う。次に，吸引
脱水を行い，残留有機溶液重量を調整する。次に，圧縮
状態で乾燥を行う。Next, the catalytic converter for purifying exhaust gas of this embodiment
A method of manufacturing the device will be described. Crystalline alumina fiber
(25mm thick, packing density 0.05g / c
m 3) Impregnated with acrylic latex and BPO
To obtain a holding sealing material. Acrylic latex impregnation
The amount shall be 4% by weight based on the mat-like material, and impregnated with BPO.
The amount was 0.5 with respect to the weight ratio of the acrylic latex.
I do. Acrylic emulsion and BPO impregnation
An aqueous solution was prepared by diluting them with water,
Spray or dipping on Next, suction
Dehydrate and adjust the residual organic solution weight. Next, compress
Dry in the state.
【００２４】次に，保持シール材を切断して，略長尺体
とする。位置合わせのため，巻き始め端部と巻き終わり
端部に，凹部１１と凸部１２とを形成してもよい。図２
（ａ），（ｂ）に示すごとく，金属シェル２の中に，保
持シール材１を巻き付けた触媒保持体３を圧入する。こ
れにより，保持シール材１の充填密度を０．３１ｇ／ｃ
ｍ３とする。その後，図１に示すごとく，金属シェル２
の両端部にスピニング加工を施して縮管させ，排気管９
１接続用のフランジ部２９を形成する。以上により，排
ガス浄化用触媒コンバータ５を得る。Next, the holding sealing material is cut into a substantially elongated body. For alignment, a concave portion 11 and a convex portion 12 may be formed at the winding start end and the winding end end. FIG.
As shown in (a) and (b), the catalyst holder 3 around which the holding sealing material 1 is wound is pressed into the metal shell 2. Thereby, the packing density of the holding sealing material 1 is reduced to 0.31 g / c.
and m 3. Then, as shown in FIG.
The spinning process is applied to both ends of the pipe and the pipe is contracted.
(1) A flange portion 29 for connection is formed. Thus, the exhaust gas purifying catalytic converter 5 is obtained.
【００２５】得られた排ガス浄化用触媒コンバーターに
ついて３５０℃×１時間の熱処理を実施したところ，熱
処理開始後１０分程度は若干異臭が感じられたが，それ
以降については異臭を感じられなかった。なお，熱処理
を１時間実施した後，排気ガス浄化用触媒コンバーター
を分解し，保持シール材の有機減少率を測定した。その
結果，有機分の重量減少率は９０％であった。保持シー
ル材は，元のアルミナ繊維の状態（白色）になってい
た。When the obtained catalytic converter for purifying exhaust gas was subjected to a heat treatment at 350 ° C. × 1 hour, a slight odor was sensed for about 10 minutes after the start of the heat treatment, but after that, no strange odor was sensed. After the heat treatment was performed for one hour, the catalytic converter for purifying exhaust gas was disassembled, and the organic reduction rate of the holding sealing material was measured. As a result, the weight loss rate of the organic component was 90%. The holding sealing material was in the original alumina fiber state (white).
【００２６】実施形態例２ 本例の保持シール材は，酸素供給物質としてＣＨＰを用
いた点以外は，実施形態例１と同様である。本例の保持
シール材を用いて排ガス浄化用触媒コンバーターを製造
し，実施形態例１と同様のテストを行ったところ，有機
分の重量減少率は９６％であった。保持シール材は，元
のアルミナ繊維の状態（白色）になっていた。Embodiment 2 The holding sealing material of this embodiment is the same as Embodiment 1 except that CHP is used as the oxygen supply material. A catalytic converter for purifying exhaust gas was manufactured using the holding sealing material of this example, and the same test as in Example 1 was performed. As a result, the weight loss rate of the organic component was 96%. The holding sealing material was in the original alumina fiber state (white).
【００２７】比較例１ 本比較例の保持シール材は，酸素供給物質を添着してい
ない点を除いて，実施形態例１と同様である。保持シー
ル材を用いて，実施形態例１と同様に排ガス浄化用触媒
コンバーターを製造し，同様のテストを行ったところ，
有機分の重量減少率は１０％と小さかった。保持シール
材の金属シェル側の表面には，有機分が炭化して茶色に
変色していた。Comparative Example 1 The holding sealing material of this comparative example is the same as that of Embodiment 1 except that no oxygen supply material is attached. Using the holding sealing material, an exhaust gas purifying catalytic converter was manufactured in the same manner as in Embodiment 1, and a similar test was performed.
The weight loss rate of the organic component was as small as 10%. On the metal shell side surface of the holding sealing material, the organic component was carbonized and turned brown.
【００２８】[0028]
【発明の効果】本発明によれば，組み付け性がよく，保
持シール材からの異臭を抑制した排ガス浄化用触媒コン
バーターの保持シール材を提供することができる。According to the present invention, it is possible to provide a holding sealing material for an exhaust gas purifying catalytic converter which has good assemblability and suppresses an odor from the holding sealing material.
【図１】実施形態例１の排ガス浄化用触媒コンバーター
の断面図。FIG. 1 is a sectional view of an exhaust gas purifying catalytic converter according to a first embodiment.
【図２】実施形態例１の排ガス浄化用触媒コンバーター
の製造方法を示す説明図（ａ），（ｂ）。FIGS. 2 (a) and 2 (b) are diagrams showing a method for manufacturing the exhaust gas purifying catalytic converter according to Embodiment 1. FIGS.
１．．．保持シール材， ２．．．金属シェル， ３．．．触媒保持体， ５．．．排ガス浄化用触媒コンバーター， 1. . . 1. holding sealing material, . . 2. metal shell; . . 4. catalyst holder, . . Catalytic converter for exhaust gas purification,
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3G091 AB01 BA39 GA06 GB01X GB01Z GB10X GB10Z GB16X GB16Z GB17X GB19Z HA27 HA28 HA29 3J040 AA01 AA11 BA01 EA16 FA06 FA20 HA03 HA06 HA16 4D048 AA06 AA13 AA18 AA21 BA03Y BA06Y BA10X BA30X BA41Y BA45X BB02 CA01 CC04 CC06 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference) CC04 CC06
Claims (5)
ける，排ガス浄化用触媒コンバーターの保持シール材に
おいて，該保持シール材は，組み付け後の充填密度が
０．１〜０．６ｇ／ｃｍ３の範囲内になるように調整さ
れている耐熱無機繊維のマット状物と，該マット状物に
対して０．１〜２０重量％の有機分と，該有機分に対す
る重量比が０．０１〜３の酸素供給物質とを有すること
を特徴とする排ガス浄化用触媒コンバーターの保持シー
ル材。1. A holding sealing material for an exhaust gas purifying catalytic converter to be assembled between a catalyst holding body and a metal shell, wherein the holding sealing material has a packing density of 0.1 to 0.6 g / cm 3 after assembling. A mat-like heat-resistant inorganic fiber adjusted to fall within the range of 0.1 to 20% by weight of an organic component relative to the mat-like product, and a weight ratio to the organic component of 0.01 to 20% by weight. 3. A holding seal material for an exhaust gas purifying catalytic converter, comprising: an oxygen supply material according to claim 3.
は，過酸化物からなることを特徴とする排ガス浄化用触
媒コンバーターの保持シール材。2. The holding seal material for an exhaust gas purifying catalytic converter according to claim 1, wherein the oxygen supply material is composed of a peroxide.
酸化ベンゾイル（以下，ＢＰＯともいう。），クメンヒ
ドロキシパーオキサイド（以下，ＣＨＰともいう。），
アゾビスイソブチロニトリル（以下，ＡＩＢＮともい
う。），ブチルパーオキシジメチルヘキサン（以下，Ｄ
ＨＢＰともいう。）及びジクミルパーオキサイド（以
下，ＤＣＰともいう。）の群から選ばれる１種または２
種以上からなることを特徴とする排ガス浄化用触媒コン
バーターの保持シール材。3. The method according to claim 2, wherein the peroxide is benzoyl peroxide (hereinafter also referred to as BPO), cumene hydroxy peroxide (hereinafter also referred to as CHP),
Azobisisobutyronitrile (hereinafter also referred to as AIBN), butylperoxydimethylhexane (hereinafter, D
Also called HBP. ) And dicumyl peroxide (hereinafter also referred to as DCP).
A holding seal material for an exhaust gas purifying catalytic converter, characterized by comprising at least one species.
上記有機分は，アクリル系エマルジョンラテックスまた
は／及びポリビニルアルコールを含むことを特徴とする
排ガス浄化用触媒コンバーターの保持シール材。4. The method according to claim 1, wherein:
A holding sealing material for an exhaust gas purifying catalytic converter, wherein the organic component contains an acrylic emulsion latex or / and polyvinyl alcohol.
上記保持シール材の耐熱無機繊維は，結晶質アルミナ繊
維，アルミナ−シリカ繊維，シリカ繊維，ガラスファイ
バー，及びロックウールの群から選ばれる１種または２
種以上からなることを特徴とする排ガス浄化用触媒コン
バーターの保持シール材。5. The method according to claim 1, wherein:
The heat-resistant inorganic fiber of the holding sealing material is one or two selected from the group consisting of crystalline alumina fiber, alumina-silica fiber, silica fiber, glass fiber, and rock wool.
A holding seal material for an exhaust gas purifying catalytic converter, characterized by comprising at least one species.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000275361A JP2002089253A (en) | 2000-09-11 | 2000-09-11 | Holding seal material of catalytic converter for exhaust emission control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000275361A JP2002089253A (en) | 2000-09-11 | 2000-09-11 | Holding seal material of catalytic converter for exhaust emission control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002089253A true JP2002089253A (en) | 2002-03-27 |
Family
ID=18760990
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000275361A Pending JP2002089253A (en) | 2000-09-11 | 2000-09-11 | Holding seal material of catalytic converter for exhaust emission control |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002089253A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100817532B1 (en) * | 2006-05-29 | 2008-03-31 | 구기연 | Rotation Advertisement Device |
| JP2013238171A (en) * | 2012-05-15 | 2013-11-28 | Nichias Corp | Gas treatment device and gas treatment method |
| JP2018119244A (en) * | 2017-01-27 | 2018-08-02 | 三菱ケミカル株式会社 | Manufacturing method of organic binder-containing inorganic fiber molding |
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| JP2013238171A (en) * | 2012-05-15 | 2013-11-28 | Nichias Corp | Gas treatment device and gas treatment method |
| JP2018119244A (en) * | 2017-01-27 | 2018-08-02 | 三菱ケミカル株式会社 | Manufacturing method of organic binder-containing inorganic fiber molding |
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