JP3272623B2 - Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded product - Google Patents
Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded productInfo
- Publication number
- JP3272623B2 JP3272623B2 JP35296596A JP35296596A JP3272623B2 JP 3272623 B2 JP3272623 B2 JP 3272623B2 JP 35296596 A JP35296596 A JP 35296596A JP 35296596 A JP35296596 A JP 35296596A JP 3272623 B2 JP3272623 B2 JP 3272623B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- reclaimed
- desulfurized
- carbon black
- producing
- 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 - Lifetime
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/62—Plastics recycling; Rubber recycling
Description
【０００１】[0001]
【技術分野】本発明は，廃棄加硫ゴムを再利用するため
の再生脱硫ゴム，その製造方法及び再生ゴム成形品の製
造方法に関する。TECHNICAL FIELD The present invention relates to a reclaimed desulfurized rubber for reusing waste vulcanized rubber, a method for producing the same, and a method for producing a reclaimed rubber molded product.
【０００２】[0002]
【従来技術】古タイヤ等の加硫ゴムよりなるゴム成形品
の廃棄物，ゴム成形品の製造工程において生じる端材，
不良品等の廃棄加硫ゴムの再利用に当たっては，まず，
該廃棄加硫ゴムを粗粉砕した後，該廃棄加硫ゴム中の硫
黄架橋結合を切断する脱硫処理を行い，再生脱硫ゴムと
なす。その後，上記再生脱硫ゴムを加硫，成形し，再生
ゴム成形品となす方法が一般的に行なわれている。2. Description of the Related Art Waste rubber products made of vulcanized rubber such as old tires, scraps generated in the process of manufacturing rubber products,
When reusing waste vulcanized rubber such as defective products,
After roughly pulverizing the waste vulcanized rubber, a desulfurization treatment for breaking the sulfur cross-linking in the waste vulcanized rubber is performed to obtain a regenerated desulfurized rubber. Thereafter, a method of vulcanizing and molding the reclaimed desulfurized rubber to form a reclaimed rubber molded product is generally performed.
【０００３】従来の脱硫処理の方法としては，パン法と
呼ばれる方法がある。これは，廃棄加硫ゴムに分解剤と
再生油を加えた後，オートクレーブ中で２００℃，水蒸
気圧１４．５ｋｇ／ｃｍ2 で処理する方法である。As a conventional desulfurization method, there is a method called a pan method. This is a method in which a decomposing agent and a regenerated oil are added to waste vulcanized rubber, followed by treatment in an autoclave at 200 ° C. and a steam pressure of 14.5 kg / cm 2 .
【０００４】[0004]
【解決しようとする課題】しかしながら，従来方法にて
得られた再生脱硫ゴムは品質が悪く，該再生脱硫ゴムに
再度加硫，成形を施し，再生ゴム成形品としても，実用
的なゴム特性が得られない。このため，通常の上記再生
ゴム成形品の製造方法としては，新材未加硫ゴム１００
重量部に対し，再生脱硫ゴムを２０〜３０重量部程度添
加し再生ゴム原料となし，該再生ゴム原料を加硫，成形
し，再生ゴム成形品とする。上記再生ゴム成形品は実用
的なゴム特性を有している。しかし，例えば自動車用タ
イヤのように多量の廃棄加硫ゴムを生じる廃棄物のリサ
イクルについては，該廃棄脱硫ゴムの消化可能量に限界
がある。However, the reclaimed desulfurized rubber obtained by the conventional method is of poor quality, and the reclaimed desulfurized rubber is again vulcanized and molded to have practical rubber properties even as a reclaimed rubber molded product. I can't get it. For this reason, the usual method for producing the above-mentioned recycled rubber molded product is a new unvulcanized rubber 100%.
About 20 to 30 parts by weight of reclaimed desulfurized rubber is added to parts by weight to form a reclaimed rubber raw material, and the reclaimed rubber raw material is vulcanized and molded to obtain a reclaimed rubber molded product. The recycled rubber molded article has practical rubber properties. However, for recycling of waste that generates a large amount of waste vulcanized rubber, for example, for automobile tires, the digestible amount of the waste desulfurized rubber is limited.
【０００５】本発明は，かかる問題点に鑑み，実用的な
ゴム特性を有する再生ゴム成形品の再生ゴム原料とし
て，それ単独で使用可能な再生脱硫ゴム，その製造方法
及び再生ゴム成形品の製造方法を提供しようとするもの
である。[0005] In view of the above problems, the present invention provides a reclaimed desulfurized rubber that can be used alone as a reclaimed rubber raw material for a reclaimed rubber molded product having practical rubber properties, a method for producing the same, and a process for producing the reclaimed rubber molded product. It seeks to provide a way.
【０００６】[0006]
【課題の解決手段】請求項１の発明は，廃棄加硫ゴムに
せん断応力１０〜１５０ｋｇ／ｃｍ ２ を加えて脱硫処理
を行うことにより硫黄架橋結合が切断されているととも
に，粒径が１００ｎｍ以下であるカーボンブラックを含
有していることを特徴とする再生脱硫ゴムにある。According to the first aspect of the present invention, there is provided a waste vulcanized rubber.
Desulfurization treatment by applying a shear stress of 10 to 150 kg / cm 2
Tomo the sulfur crosslinking it is cleaved by performing
To, in reproducing desulfurization rubber, wherein the particle size contains a carbon black is 100nm or less.
【０００７】本発明の作用につき，以下に説明する。本
発明の再生脱硫ゴムは，内部に上記のごとき微細なカー
ボンブラックを分散状態にて含有している。そして，上
記カーボンブラックは再生脱硫ゴムを加硫，成形するこ
とにより得られる再生ゴム成形品のゴム特性の品質維持
に大きく寄与している。The operation of the present invention will be described below. The reclaimed desulfurized rubber of the present invention contains fine carbon black as described above in a dispersed state. The carbon black greatly contributes to maintaining the quality of the rubber properties of the reclaimed rubber molded product obtained by vulcanizing and molding the reclaimed desulfurized rubber.
【０００８】その理由は，明確ではないが，１００ｎｍ
以下の微細なカーボンブラックがゴム分子間の架橋中継
点となるためである，と推定される。上記カーボンブラ
ックの粒径が１００ｎｍより大きい場合には，多数のゴ
ム分子がそこに集中するため，却って構造的に脆くなる
おそれがある。Although the reason is not clear, 100 nm
It is presumed that this is because the following fine carbon blacks serve as bridging relay points between rubber molecules. When the particle size of the carbon black is larger than 100 nm, a large number of rubber molecules are concentrated there, and the structure may be rather brittle.
【０００９】また，上記カーボンブラックの粒径は，小
さければ小さい程好ましい。但し，５ｎｍ以下である場
合には，架橋中継点としての大きさが不足気味となり，
ベストではない。よって，上記再生脱硫ゴムよりなる再
生ゴム成形品は，新材ゴム１００％よりなるゴム成形品
並のゴム特性を有する（表１，表３参照）。The smaller the particle size of the carbon black, the better. However, if it is 5 nm or less, the size as a cross-linking relay point tends to be insufficient, and
Not the best. Therefore, the reclaimed rubber molded product made of the reclaimed desulfurized rubber has rubber characteristics comparable to those of a rubber molded product made of 100% new rubber (see Tables 1 and 3).
【００１０】また，上記再生脱硫ゴムは，廃棄加硫ゴム
の状態において保有していた硫黄架橋結合は切断されて
いるが，ゴム分子の主鎖は切断されていない。なお，す
べての硫黄架橋結合が切断されている必要はない。[0010] Further, in the above-mentioned reclaimed desulfurized rubber, the sulfur cross-linking bond held in the state of waste vulcanized rubber is cut, but the main chain of the rubber molecule is not cut. Not all sulfur cross-links need to be broken.
【００１１】なお，上記ゴム特性とは，上記再生脱硫ゴ
ムより得られた再生ゴム成形品の状態において，引張強
度，破断伸び等により示すことができる，通常のゴム成
形品に要求される弾力性等の性質である。なお，上記カ
ーボンブラックは，廃棄加硫ゴムが含有していた粗粒の
カーボンブラックが，後述する脱硫処理の際に微細化し
たものである。[0011] The above-mentioned rubber characteristics are defined as the elasticity required for ordinary rubber molded products, which can be expressed by tensile strength, elongation at break, etc. in the state of a recycled rubber molded product obtained from the above-mentioned reclaimed desulfurized rubber. And the like. The carbon black is obtained by coarsening carbon black contained in the waste vulcanized rubber during the desulfurization treatment described later.
【００１２】また，元来カーボンブラックを含有してい
ない廃棄加硫ゴムに対しては，上記脱硫処理前にカーボ
ンブラックを添加すればよい。この時添加されるカーボ
ンブラックは，一次粒子が凝集して粒径が１００ｎｍを
越えている。しかし，後述する脱硫処理の際に加えられ
る剪断応力によって微細化する。Further, carbon black may be added to the waste vulcanized rubber originally containing no carbon black before the desulfurization treatment. The carbon black added at this time has primary particles aggregated and the particle size exceeds 100 nm. However, they are refined by the shear stress applied during the desulfurization treatment described later.
【００１３】次に，上記廃棄加硫ゴムは，例えば，炭素
主鎖からなる長い鎖状有機化合物の集合体である生ゴム
に，硫黄または硫黄化合物を混合し，上記生ゴム中の炭
素主鎖間等に−Ｓ−結合，−Ｓ−Ｓ−結合，−Ｓ−Ｓ−
Ｓ−結合等の多種の硫黄架橋結合を形成させ，エラスト
マまたはゴムの性状を呈するようにした物質よりなる。Next, the waste vulcanized rubber is prepared, for example, by mixing sulfur or a sulfur compound with raw rubber, which is an aggregate of long chain organic compounds composed of a carbon main chain, to form a mixture between carbon main chains in the raw rubber. -S- bond, -S-S- bond, -S-S-
It is made of a substance that forms various kinds of sulfur cross-links such as S-bonds to exhibit properties of an elastomer or rubber.
【００１４】上記鎖状有機化合物としては，例えば，天
然ゴム，ブタジエンゴム，イソプレンゴム，ブチルゴ
ム，エチレン−プロピレンゴム，スチレン−ブタジエン
ゴム，クロロプレンゴム，ニトリルゴム，アクリルゴ
ム，エピクロルヒドリンゴム，クロロスルホン化ポリエ
チレン，塩素化ポリエチレン，ＥＰＤＭ等が挙げられ
る。Examples of the chain organic compound include natural rubber, butadiene rubber, isoprene rubber, butyl rubber, ethylene-propylene rubber, styrene-butadiene rubber, chloroprene rubber, nitrile rubber, acrylic rubber, epichlorohydrin rubber, and chlorosulfonated polyethylene. , Chlorinated polyethylene, EPDM and the like.
【００１５】また，上記廃棄加硫ゴムは，例えば，炭素
鎖を含む天然ゴムに硫黄または硫黄化合物を混合し，上
記天然ゴムの炭素鎖間等に上記同様の多種の硫黄架橋結
合を形成させ，エラストマまたはゴムの性状を呈するよ
うにした物質もある。[0015] The waste vulcanized rubber is prepared, for example, by mixing sulfur or a sulfur compound with a natural rubber containing a carbon chain to form various kinds of sulfur cross-links between the carbon chains of the natural rubber. Some substances have been adapted to exhibit the properties of an elastomer or rubber.
【００１６】請求項２の発明のように，上記カーボンブ
ラックは，粒径が６０ｎｍ以下であることが好ましい。
次に，請求項３の発明は，カーボンブラックを含む，又
はカーボンブラックを予め添加した廃棄加硫ゴムを温度
１８０〜３５０℃，剪断応力１０〜１５０ｋｇ／ｃｍ2
の条件にて脱硫処理することにより溶融状態とすること
を特徴とする再生脱硫ゴムの製造方法にある。以上の条
件にて脱硫処理を行うことにより，廃棄加硫ゴム中の硫
黄架橋結合は切断されるが，ゴム分子の主鎖の切断は回
避することができる。[0016] As the invention of claim 2, the carbon black is arbitrarily preferred that the particle size is 60nm or less.
Next, a third aspect of the present invention is to provide a waste vulcanized rubber containing carbon black or to which carbon black is added in advance at a temperature of 180 to 350 ° C. and a shear stress of 10 to 150 kg / cm 2.
A method for producing a reclaimed desulfurized rubber, which is in a molten state by desulfurizing under the following conditions. By performing the desulfurization treatment under the above conditions, the sulfur cross-linking in the waste vulcanized rubber is broken, but the breaking of the main chain of the rubber molecule can be avoided.
【００１７】また，廃棄加硫ゴムに含まれるカーボンブ
ラックの粒径が１００ｎｍ以下に，微細化される。これ
により，上記再生脱硫ゴムを用いた再生ゴム成形品のゴ
ム特性の低下を防止することができる。Further, the particle size of carbon black contained in the waste vulcanized rubber is reduced to 100 nm or less. As a result, it is possible to prevent a reduction in the rubber characteristics of a recycled rubber molded product using the above-described recycled desulfurized rubber.
【００１８】次に，上記脱硫処理における温度が１８０
℃未満である場合には，硫黄架橋結合の切断の進行が遅
くなり，脱硫処理に長時間かかるおそれがある。一方，
３５０℃より高い場合には，ゴム分子における主鎖が切
断され，得られたこの再生脱硫ゴムを用いた再生ゴム成
形品のゴム特性が大きく低下するおそれがある。Next, the temperature in the desulfurization treatment is set to 180.
If the temperature is lower than 0 ° C., the progress of the breaking of the sulfur cross-linking becomes slow, and the desulfurization treatment may take a long time. on the other hand,
If the temperature is higher than 350 ° C., the main chain of the rubber molecule is cut, and the rubber properties of a reclaimed rubber molded product using the reclaimed desulfurized rubber thus obtained may be greatly reduced.
【００１９】次に，上記脱硫処理における剪断応力が１
０ｋｇ／ｃｍ2 未満である場合には，カーボンブラック
の微細化及び再生脱硫ゴム中へのカーボンブラックの分
散が発生しないおそれがある。このような脱硫処理によ
り製造された再生脱硫ゴムを用いた再生ゴム成形品で
は，実用的なゴム特性が得られないおそれがあり，か
つ，新材未加硫ゴムを混合しなくては再生ゴム成形品を
得ることができないため，廃棄加硫ゴムを使用する量，
即ち消化可能量が低くなる。更に，硫黄架橋結合の切断
の進行も遅くなり，脱硫処理が長時間となるおそれがあ
る。Next, the shear stress in the desulfurization treatment is 1
If it is less than 0 kg / cm 2 , the carbon black may not be finely divided and the carbon black may not be dispersed in the reclaimed desulfurized rubber. Recycled rubber molded products using the reclaimed desulfurized rubber produced by such desulfurization treatment may not be able to obtain practical rubber properties, and must be mixed with new unvulcanized rubber. Since molded products cannot be obtained, the amount of waste vulcanized rubber used,
That is, the digestible amount decreases. Furthermore, the progress of the breaking of the sulfur cross-linking is slowed down, and the desulfurization treatment may take a long time.
【００２０】一方，１５０ｋｇ／ｃｍ2 より大きい場合
には，ゴム分子における主鎖が切断され，この条件にて
得られた再生脱硫ゴムを用いた再生ゴム成形品のゴム特
性が大きく低下するおそれがある。On the other hand, if it is larger than 150 kg / cm 2 , the main chain of the rubber molecule is cut, and the rubber properties of the reclaimed rubber molded article using the reclaimed desulfurized rubber obtained under these conditions may be greatly reduced. is there.
【００２１】上記廃棄加硫ゴムに剪断応力を加える際に
は，剪断応力を加えると同時に，廃棄加硫ゴムを加熱す
ることができる装置を使用することができる。上記装置
としては，例えば，２軸押出機，ゴムロール等が挙げら
れる。また，上記脱硫処理は，特に制約はないが，例え
ば１〜５分間行うことができる。When a shear stress is applied to the waste vulcanized rubber, an apparatus capable of heating the waste vulcanized rubber while applying the shear stress can be used. Examples of the above device include a twin screw extruder and a rubber roll. The desulfurization treatment is not particularly limited, but can be performed, for example, for 1 to 5 minutes.
【００２２】次に，請求項４のように，上記廃棄加硫ゴ
ムには分解剤を添加して上記脱硫処理を行うことが好ま
しい。上記分解剤は，廃棄加硫ゴムにおける硫黄架橋結
合を切断する作用を有する。従って，上記分解剤を添加
することにより，脱硫処理における温度を２０℃程度下
げることができ，よって，ゴム分子の主鎖の切断を防止
することができる。Next, as claimed in claim 4, it is preferable that by adding a decomposing agent to the waste vulcanized rubber performs the desulfurization process. The decomposer has an action of breaking sulfur cross-links in waste vulcanized rubber. Therefore, by adding the above-mentioned decomposing agent, the temperature in the desulfurization treatment can be lowered by about 20 ° C., so that the breaking of the main chain of the rubber molecule can be prevented.
【００２３】なお，上記分解剤としては，例えば，ジア
リールジスルフィド，ジキシルジスルフィド，チオフェ
ノール−酸化鉄等のグループより選ばれる少なくとも一
種を用いることができる。As the decomposing agent, for example, at least one selected from the group consisting of diaryl disulfide, dixyl disulfide, thiophenol-iron oxide and the like can be used.
【００２４】次に，請求項５のように，上記廃棄加硫ゴ
ムには再生油を添加して上記脱硫処理を行うことが好ま
しい。上記再生油は，加硫ゴムとの相溶性が高い物質で
ある。従って，上記再生油を廃棄加硫ゴムに加えること
により，該加硫ゴムは膨潤する。このため，廃棄加硫ゴ
ムにおける硫黄架橋結合の切断が促進される。従って，
上記再生油を使用することにより，短時間で脱硫処理が
完了し，よってゴム分子の主鎖の切断を防止することが
できる。Next, as claimed in claim 5, in the waste vulcanized rubber it is preferable to perform the desulfurization process by adding reclaimed oil. The recycled oil is a substance having high compatibility with the vulcanized rubber. Therefore, by adding the reclaimed oil to the waste vulcanized rubber, the vulcanized rubber swells. For this reason, the breaking of sulfur cross-links in the waste vulcanized rubber is promoted. Therefore,
By using the above-mentioned reclaimed oil, desulfurization treatment can be completed in a short period of time, so that the main chain of the rubber molecule can be prevented from being cut.
【００２５】なお，上記再生油としては，例えば，パラ
フィン系プロセスオイル，ナフテン系プロセスオイル等
のグループより選ばれる少なくとも一種を用いることが
できる。As the reclaimed oil, for example, at least one selected from the group consisting of paraffinic process oil, naphthenic process oil and the like can be used.
【００２６】なお，以上の脱硫処理においては，従来の
脱硫処理の際に使用される各種の添加剤を使用すること
もできる。上記添加剤としては，カーボンブラック，酸
化亜鉛，ステアリン酸等が挙げられる。In the above desulfurization treatment, various additives used in the conventional desulfurization treatment can be used. Examples of the additives include carbon black, zinc oxide, and stearic acid.
【００２７】次に，請求項６の発明のように，上記廃棄
加硫ゴムがＥＰＤＭであり，これを温度２８０〜３３０
℃，剪断応力１０〜３０ｋｇ／ｃｍ2 の条件にて脱硫処
理することが好ましい。Next, as in the sixth aspect of the present invention, the waste vulcanized rubber is EPDM, which is heated to a temperature of 280 to 330.
The desulfurization treatment is preferably carried out at a temperature of 10 ° C. and a shear stress of 10 to 30 kg / cm 2 .
【００２８】この条件にかかる脱硫処理より得られた再
生脱硫ゴムの網目濃度，即ち，未切断の架橋密度は，脱
硫前の１／４〜１／１０程度である。即ち，上記再生脱
硫ゴムは網目構造が残留した状態にある。このような再
生脱硫ゴムを加硫し，成形した再生ゴム成形品は，新材
未加硫ゴムを加硫，成形することにより得られたゴム成
形品と比較して，上記網目構造が複雑かつ密となる。こ
のため，上記再生ゴム成形品の特性は，単なるゴム成形
品と比較して高い。以上により，上記製造方法により，
優れたゴム特性を有する再生ゴム成形品の再生ゴム原料
として，それ単独で使用可能な再生脱硫ゴムを得ること
ができる。The network density of the reclaimed desulfurized rubber obtained by the desulfurization treatment under these conditions, that is, the uncut crosslink density is about 1/4 to 1/10 of that before desulfurization. That is, the regenerated desulfurized rubber is in a state where the network structure remains. A reclaimed rubber molded product obtained by vulcanizing and molding such reclaimed desulfurized rubber has a more complicated network structure than the rubber molded product obtained by vulcanizing and molding new unvulcanized rubber. Be dense. Therefore, the characteristics of the recycled rubber molded product are higher than those of a mere rubber molded product. As described above, according to the above manufacturing method,
A reclaimed desulfurized rubber that can be used alone can be obtained as a reclaimed rubber raw material for a reclaimed rubber molded product having excellent rubber properties.
【００２９】上記ＥＰＤＭとは，エチレンプロピレンジ
エンターポリマーであり，その炭化水素主鎖はエチレン
とプロピレンとジエン成分の共重合体よりなり，加硫に
関与する二重結合は上記炭化水素主鎖にはなく，側鎖に
存在するポリマーである。なお，上記ジエン成分として
は，エチリデンノルボルネン，ジシクロペンタジエン等
が使用されている。The above EPDM is an ethylene propylene diene terpolymer whose hydrocarbon main chain is composed of a copolymer of ethylene, propylene and a diene component, and a double bond involved in vulcanization is added to the above hydrocarbon main chain. Is a polymer present in the side chain. As the diene component, ethylidene norbornene, dicyclopentadiene and the like are used.
【００３０】また，上記ＥＰＤＭは，上述した炭素主鎖
よりなる生ゴムに硫黄または硫黄化合物を混合し，上記
生ゴム中の炭素主鎖間等に−Ｓ−結合，−Ｓ−Ｓ−結
合，−Ｓ−Ｓ−Ｓ−結合等の多種の硫黄架橋結合を形成
させ，エラストマまたはゴムの性状を呈するようにした
物質である。そして，上記網目構造とは，ゴムの炭素主
鎖が−Ｓ−，−Ｓ−Ｓ−，−Ｓ−Ｓ−Ｓ−等の結合によ
り３次元的に網目状になっている構造である。In the EPDM, sulfur or a sulfur compound is mixed with the above-described raw rubber having a carbon main chain, and -S-bond, -SS-bond, -S It is a substance in which various kinds of sulfur cross-links such as -S-S- bonds are formed to exhibit properties of an elastomer or rubber. The above-mentioned network structure is a structure in which the carbon main chain of rubber is three-dimensionally formed by bonding of -S-, -SS-, -S-S-S-, and the like.
【００３１】また，上記温度が２８０℃未満である場合
には，得られた再生脱硫ゴムの脱硫度が若干低下するこ
とから，これより得られた再生ゴム成形品の伸びが低下
するおそれがある。一方，上記温度が３３０℃より高い
場合には，網目濃度が脱硫前の１／１０以下となるおそ
れがある。このため，得られた再生脱硫ゴムより作成し
た再生ゴム成形品のゴム特性が，通常の新材未加硫ゴム
より作成したゴム成形品と変わらなくなるおそれがあ
る。If the above temperature is lower than 280 ° C., the degree of desulfurization of the obtained reclaimed desulfurized rubber is slightly reduced, and the elongation of the reclaimed rubber molded article obtained therefrom may be reduced. . On the other hand, if the temperature is higher than 330 ° C., the mesh concentration may be 1/10 or less of that before desulfurization. For this reason, the rubber properties of the reclaimed rubber molded product made from the obtained reclaimed desulfurized rubber may not be the same as the rubber molded product made from ordinary new unvulcanized rubber.
【００３２】また，上記剪断応力が１０ｋｇ／ｃｍ2 未
満である場合には，請求項３において述べたのと同様
に，カーボンブラックの微細化及び再生脱硫ゴム中への
カーボンブラックの分散が発生しないおそれがある。こ
のような脱硫処理により製造された再生脱硫ゴムを用い
た再生ゴム成形品では，実用的なゴム特性が得られない
おそれがある。また，新材未加硫ゴムを混合しなくては
再生ゴム成形品を得ることができないため，廃棄加硫ゴ
ムを使用する量，即ち消化可能量が低くなるおそれがあ
る。更に，硫黄架橋結合の切断の進行も遅くなり，脱硫
処理が長時間となるおそれがある。When the shear stress is less than 10 kg / cm 2 , the fineness of the carbon black and the dispersion of the carbon black in the reclaimed desulfurized rubber do not occur, as described in the third aspect . There is a risk. A reclaimed rubber molded product using the reclaimed desulfurized rubber produced by such desulfurization treatment may not provide practical rubber properties. Also, since a recycled rubber molded product cannot be obtained without mixing new unvulcanized rubber, the amount of waste vulcanized rubber, that is, the digestible amount may be reduced. Furthermore, the progress of the breaking of the sulfur cross-linking is slowed down, and the desulfurization treatment may take a long time.
【００３３】一方，上記剪断応力が３０ｋｇ／ｃｍ2 よ
り大きい場合には，網目密度が脱硫前の１／１０以下と
なるおそれがある。このため，上述と同様，これにより
得られた再生脱硫ゴムを加硫，成形し生成ゴム成形品と
した場合，そのゴム特性は通常の新材未加硫ゴムより加
硫，成形されたゴム成形品と変わらなくなるおそれがあ
る。On the other hand, when the shear stress is larger than 30 kg / cm 2 , the mesh density may be 1/10 or less of that before desulfurization. Therefore, as described above, when the reclaimed desulfurized rubber thus obtained is vulcanized and molded to produce a rubber molded product, its rubber characteristics are determined by vulcanization and molding of a rubber vulcanized and molded from ordinary new unvulcanized rubber. There is a possibility that it will not be different from the product.
【００３４】次に，請求項７の発明は，カーボンブラッ
クを含む，又はカーボンブラックを予め添加した廃棄加
硫ゴムにせん断応力１０〜１５０ｋｇ／ｃｍ２を加えて
脱硫処理を行うことにより硫黄架橋結合を切断するとと
もに上記カーボンブラックの粒径を１００ｎｍ以下にし
てなる再生脱硫ゴムを得，該再生脱硫ゴムを単独で用い
るか，または該再生脱硫ゴムと新材未加硫ゴムとを添加
混合して再生ゴム原料となし，次いで，該再生ゴム原料
を所望形状に加硫，成形することを特徴とする再生ゴム
成形品の製造方法にある。上記製造方法は，上記請求項
１に示した再生脱硫ゴムの利用方法の一例である。Next, a seventh aspect of the present invention is to provide a sulfur cross-linking by applying a shear stress of 10 to 150 kg / cm 2 to waste vulcanized rubber containing carbon black or to which carbon black has been previously added to carry out desulfurization treatment. To obtain a reclaimed desulfurized rubber having a particle size of the carbon black of 100 nm or less. The reclaimed desulfurized rubber is used alone, or the reclaimed desulfurized rubber is mixed with a new unvulcanized rubber. A method for producing a reclaimed rubber molded article characterized by forming a reclaimed rubber raw material, and then vulcanizing and molding the reclaimed rubber raw material into a desired shape. The above manufacturing method is an example of a method of using the reclaimed desulfurized rubber described in the first aspect.
【００３５】上記再生脱硫ゴムは，単独で加硫，成形す
ることにより，新材未加硫ゴムのみよりなるゴム成形品
と同等のゴム特性を有する再生ゴム成形品となる。ま
た，上記再生脱硫ゴムを新材未加硫ゴムに任意の割合で
混合した再生ゴム原料も，新材未加硫ゴムのみよりなる
ゴム成形品と同等のゴム特性を有する再生ゴム成形品と
なる。このため，例えば自動車用タイヤのように多量の
廃棄加硫ゴムを生じる廃棄物のリサイクルについては，
該廃棄脱硫ゴムの消化可能量を大きく増大することがで
きる。The above-mentioned reclaimed desulfurized rubber is vulcanized and molded alone to produce a reclaimed rubber molded product having the same rubber properties as a rubber molded product composed of only new unvulcanized rubber. A recycled rubber raw material obtained by mixing the above-mentioned recycled desulfurized rubber with a new material unvulcanized rubber at an arbitrary ratio also becomes a recycled rubber molded product having the same rubber properties as a rubber molded product composed of only the new material unvulcanized rubber. . For this reason, for recycling of waste that produces a large amount of waste vulcanized rubber, such as for automobile tires,
The digestible amount of the waste desulfurized rubber can be greatly increased.
【００３６】なお，上記加硫に際しては，硫黄，過酸化
物よりなる各種加硫剤を用いて加硫，成形を行うことが
できる。上記加硫，成形は，通常の新材未加硫ゴムの加
硫，成形と同様の方法で行うことができる。In the above vulcanization, vulcanization and molding can be performed using various vulcanizing agents consisting of sulfur and peroxide. The vulcanization and molding can be performed in the same manner as in the vulcanization and molding of ordinary unvulcanized new rubber.
【００３７】[0037]
実施形態例 本発明の実施形態例にかかる再生脱硫ゴム，その製造方
法及びこれを用いた再生ゴム成形品の製造方法につき説
明する。本例の再生脱硫ゴムは，硫黄架橋結合が切断さ
れ，粒径が１００ｎｍ以下であるカーボンブラックを含
有している。Embodiment A reclaimed desulfurized rubber according to an embodiment of the present invention, a method for producing the same, and a method for producing a reclaimed rubber molded product using the same will be described. The reclaimed desulfurized rubber of this example contains carbon black having a particle diameter of 100 nm or less, in which sulfur cross-linking is broken.
【００３８】次に，上記再生脱硫ゴムの製造方法につい
て説明する。まず，廃棄加硫ゴムを粉砕する。これによ
り得られた粉砕物を２軸押出機（スクリュ径３０ｍｍ，
スクリュ長さ１２６０ｍｍ）に投入し，加熱しつつ，剪
断応力を加え，脱硫し，その後冷却する。以上により，
ストランド状の再生脱硫ゴムを得る。Next, a method for producing the above-described reclaimed desulfurized rubber will be described. First, the waste vulcanized rubber is pulverized. The pulverized material obtained in this way is twin-screw extruder (screw diameter 30 mm,
(Screw length: 1260 mm), heated, subjected to shear stress, desulfurized, and then cooled. From the above,
A strand-like reclaimed desulfurized rubber is obtained.
【００３９】次に，上記再生脱硫ゴムを用いた再生ゴム
成形品の製造方法としては，まず，上記再生脱硫ゴム１
００重量部に対し，硫黄を０．５重量部，酸化亜鉛を
１．７重量部，ステアリン酸を０．３重量部，ノクセラ
ーＴＴを０．６７重量部，ノクセラーＭを０．１７重量
部を加え，混合し，再生ゴム原料となす。その後，上記
再生ゴム原料をプレス成形することにより，再生ゴム成
形品を得る。Next, as a method of manufacturing a reclaimed rubber molded product using the reclaimed desulfurized rubber, first, the reclaimed desulfurized rubber 1
0.5 parts by weight of sulfur, 1.7 parts by weight of zinc oxide, 0.3 parts by weight of stearic acid, 0.67 parts by weight of Noxeller TT, and 0.17 parts by weight of Noxeller M are added to 00 parts by weight. In addition, mix to form a recycled rubber material. Thereafter, the recycled rubber raw material is press-molded to obtain a recycled rubber molded product.
【００４０】次に，本発明にかかる再生脱硫ゴムである
試料１〜７を従来品である比較試料Ｃ１，Ｃ２と共に表
１〜表３を用いて説明する。また，試料１〜７及び比較
試料Ｃ１，Ｃ２を用いた再生ゴム成形品のゴム特性につ
き同様に説明する。なお，試料１〜試料３，試料７，比
較試料Ｃ１はＥＰＤＭよりなる廃棄加硫ゴムが原料であ
った。試料４〜試料６，比較試料Ｃ２はブチルゴムより
なる廃棄加硫ゴムが原料であった。Next, Samples 1 to 7 which are reclaimed and desulfurized rubbers according to the present invention will be described with reference to Tables 1 to 3 together with Comparative Samples C1 and C2 which are conventional products. The rubber characteristics of the recycled rubber molded products using the samples 1 to 7 and the comparative samples C1 and C2 will be described similarly. Samples 1 to 3, Sample 7, and Comparative Sample C1 were made of waste vulcanized rubber made of EPDM. Samples 4 to 6 and Comparative Sample C2 were made from waste vulcanized rubber made of butyl rubber.
【００４１】試料１にかかる再生脱硫ゴムは，上述した
ごとく，廃棄加硫ゴムを粉砕し，これにより得られた粉
砕物を２軸押出機（スクリュ径３０ｍｍ，スクリュ長さ
１２６０ｍｍ）に投入し，加熱しつつ，剪断応力を加
え，処理能力５ｋｇ／時間にて脱硫処理することにより
製造した。As described above, the reclaimed desulfurized rubber according to Sample 1 is obtained by pulverizing waste vulcanized rubber, and the resulting pulverized product is put into a twin-screw extruder (screw diameter 30 mm, screw length 1260 mm). It was manufactured by applying a shear stress while heating and desulfurizing at a processing capacity of 5 kg / hour.
【００４２】また，試料２，試料３も，同様に製造し
た。ただし，試料２は脱硫処理の際に，予め廃棄加硫ゴ
ム１００重量部に対し，１重量部の分解剤（ジアリール
ジスルフィド）を混合，試料３は，予め廃棄加硫ゴム１
００重量部に対し，１０重量部の再生油（プロセスオイ
ル）を混合した。Samples 2 and 3 were manufactured in the same manner. However, in the case of Sample 2, 1 part by weight of a decomposing agent (diaryl disulfide) was previously mixed with 100 parts by weight of waste vulcanized rubber at the time of desulfurization treatment.
Recycled oil (process oil) of 10 parts by weight was mixed with 00 parts by weight.
【００４３】また，試料４は試料１と同様の条件，試料
５は試料２と同様の条件，試料６は試料３と同様の条件
にて製造した再生脱硫ゴムである。上述したごとく，試
料４〜試料６はブチルゴムよりなる廃棄加硫ゴムを原料
とした。なお，上記脱硫処理における剪断応力，温度，
時間は表１に示した。Sample 4 is a recycled desulfurized rubber manufactured under the same conditions as sample 1, sample 5 under the same conditions as sample 2, and sample 6 under the same conditions as sample 3. As described above, Samples 4 to 6 were made from waste vulcanized rubber made of butyl rubber. In addition, the shear stress, temperature,
The time is shown in Table 1.
【００４４】また，試料７は，試料１と同様に製造し
た。ただし，上記脱硫処理における剪断応力は２０ｋｇ
／ｃｍ2 であった。The sample 7 was manufactured in the same manner as the sample 1. However, the shear stress in the desulfurization treatment was 20 kg.
/ Cm 2 .
【００４５】比較試料Ｃ１にかかる再生脱硫ゴムも，試
料１と同様に製造した。また，比較試料Ｃ２は，上述し
たごとく，ブチルゴムよりなる廃棄加硫ゴムを原料とし
た。なお，上記脱硫処理における剪断応力，温度，時間
は表２に示した。A reclaimed desulfurized rubber according to Comparative Sample C1 was produced in the same manner as in Sample 1. As described above, the comparative sample C2 was made from a waste vulcanized rubber made of butyl rubber. Table 2 shows the shear stress, temperature and time in the desulfurization treatment.
【００４６】以上により得られた試料１〜７及び比較試
料Ｃ１，Ｃ２について，ムーニー粘度を測定した。ま
た，電子顕微鏡にて観察し，カーボンブラックの平均粒
径を測定した。以上の結果は，表１及び表２に示した。The Mooney viscosities of the thus obtained Samples 1 to 7 and Comparative Samples C1 and C2 were measured. Further, the particles were observed with an electron microscope, and the average particle size of carbon black was measured. The above results are shown in Tables 1 and 2.
【００４７】次に，試料１〜７及び比較試料Ｃ１，Ｃ２
に対し，上述した各種添加剤を加え，再生ゴム原料とな
す。その後，上記再生ゴム原料をプレス成形し，再生ゴ
ム成形品である厚さ５ｍｍ，大きさ３０ｃｍ×３０ｃｍ
のシートを得た。上記シートより，ＪＩＳ−Ｋ６３０１
に準じ，ダンベル型試験片を切り出し，該ダンベル型試
験片において引張強度及び破断伸びの測定を行った。Next, samples 1 to 7 and comparative samples C1 and C2
In addition, the above-mentioned various additives are added to form a recycled rubber raw material. Thereafter, the above-mentioned recycled rubber raw material is press-molded, and the recycled rubber molded product is 5 mm thick, 30 cm × 30 cm in size.
Sheet was obtained. From the above sheet, JIS-K6301
A dumbbell-shaped test piece was cut out according to the above-mentioned method, and the tensile strength and the elongation at break of the dumbbell-shaped test piece were measured.
【００４８】なお，表３は，ＥＰＤＭ及びブチルゴムを
含有する新材未加硫ゴムを加硫，成形することにより製
造したゴム成形品の引張強度及び破断伸びである。上記
加硫，成形は，上記試料１〜７，比較試料Ｃ１，Ｃ２を
加硫，成形し，再生ゴム成形品となした場合と同様の条
件にて行う。Table 3 shows the tensile strength and elongation at break of a rubber molded product produced by vulcanizing and molding a new unvulcanized rubber containing EPDM and butyl rubber. The vulcanization and molding are carried out under the same conditions as in the case where the samples 1 to 7 and the comparative samples C1 and C2 are vulcanized and molded to form a recycled rubber molded product.
【００４９】上記測定結果につき表１〜表３を用いて説
明する。まず，試料１〜７にかかる再生脱硫ゴムはいず
れもムーニー粘度が低く，表１に示す条件の脱硫処理に
より，充分に硫黄架橋結合が切断されたことが分かっ
た。また，上記試料１〜７に含まれるカーボンブラック
の粒径は４０〜６０ｎｍのものが主であった。The above measurement results will be described with reference to Tables 1 to 3. First, it was found that the regenerated desulfurized rubbers of Samples 1 to 7 all had low Mooney viscosities, and that the sulfur cross-linking was sufficiently broken by the desulfurization treatment under the conditions shown in Table 1. In addition, the particle diameter of the carbon black contained in the samples 1 to 7 was mainly 40 to 60 nm.
【００５０】また，上記試料２，５は，試料１，４より
低い温度にて脱硫処理を行うことができることが分かっ
た。更に，試料３，６は，試料１，４より短時間で脱硫
処理を行うことができることが分かった。従って，分解
剤及び再生油のいずれかを脱硫処理に先立って廃棄加硫
ゴムに添加することにより，より効率良く脱硫処理を行
うことができることが分かった。It was also found that Samples 2 and 5 can be subjected to desulfurization at a lower temperature than Samples 1 and 4. Further, it was found that Samples 3 and 6 can be desulfurized more quickly than Samples 1 and 4. Therefore, it was found that the desulfurization treatment can be performed more efficiently by adding either the decomposing agent or the regenerated oil to the waste vulcanized rubber prior to the desulfurization treatment.
【００５１】次に，試料１〜３にかかる再生脱硫ゴムを
加硫，成形した再生ゴム成形品の引張強度及び破断伸び
は，表３における参考１とほぼ同様の値であった。即
ち，試料１にかかる再生ゴム成形品は新材未加硫ゴムを
加硫，成形したゴム成形品と同程度のゴム特性を有する
ことが分かった。また，試料４〜６を用いた再生ゴム成
形品の引張強度及び破断伸びについても，同様に表３に
おける参考２とほぼ同様の値であり，新材未加硫ゴムよ
り得られたゴム成形品と同程度のゴム特性を有すること
が分かった。Next, the tensile strength and the elongation at break of the reclaimed rubber molded product obtained by vulcanizing and molding the reclaimed desulfurized rubber according to Samples 1 to 3 were almost the same values as Reference 1 in Table 3. That is, it was found that the reclaimed rubber molded product according to Sample 1 had the same rubber properties as the rubber molded product obtained by vulcanizing and molding a new unvulcanized rubber. Also, the tensile strength and elongation at break of the recycled rubber molded products using Samples 4 to 6 are almost the same as those of Reference 2 in Table 3, and the rubber molded products obtained from the new unvulcanized rubber are also obtained. It was found to have rubber properties comparable to
【００５２】また，試料７を加硫，成形した再生ゴム成
形品は，破断伸びについては他の試料と同程度であっ
た。ただし，引張強度については，他の試料，また表３
における参考１に示したゴム成形品よりも大きかった。
即ち，試料７にかかる再生脱硫ゴムからは，新材未加硫
ゴムより作成したゴム成形品よりも優れた再生ゴム成形
品が得られたことが分かった。The reclaimed rubber molded product obtained by vulcanizing and molding Sample 7 had a breaking elongation comparable to that of the other samples. However, regarding the tensile strength, other samples and Table 3
The size was larger than the rubber molded product shown in Reference 1.
That is, it was found that from the reclaimed desulfurized rubber according to Sample 7, a reclaimed rubber molded product superior to the rubber molded product made from the new unvulcanized rubber was obtained.
【００５３】次に，比較試料Ｃ１，Ｃ２にかかる再生脱
硫ゴムは共にムーニー粘度が高く，表２に示す条件の脱
硫処理により，充分に硫黄架橋結合を切断することがで
きないことが分かった。また，カーボンブラックの粒径
は１９０〜２００ｎｍのものが主であった。更に，比較
試料Ｃ１，Ｃ２を用いた再生ゴム成形品は，参考１，参
考２のゴム成形品と比較して引張強度及び破断伸びが低
く，実用に耐えるゴム特性を有していないことが分かっ
た。Next, it was found that both of the reclaimed desulfurized rubbers of Comparative Samples C1 and C2 had high Mooney viscosities and could not sufficiently break the sulfur cross-linking by the desulfurization treatment under the conditions shown in Table 2. The particle size of the carbon black was mainly 190 to 200 nm. Furthermore, the recycled rubber molded products using the comparative samples C1 and C2 have lower tensile strength and elongation at break than those of the rubber molded products of Reference 1 and Reference 2, and do not have rubber characteristics that can withstand practical use. Was.
【００５４】[0054]
【表１】 [Table 1]
【００５５】[0055]
【表２】 [Table 2]
【００５６】[0056]
【表３】 [Table 3]
【００５７】[0057]
【発明の効果】上記のごとく，本発明によれば，実用的
なゴム特性を有する再生ゴム成形品の再生ゴム原料とし
て，それ単独で使用可能な再生脱硫ゴム，その製造方法
及び再生ゴム成形品の製造方法を提供することができ
る。As described above, according to the present invention, a reclaimed desulfurized rubber that can be used alone as a reclaimed rubber raw material for a reclaimed rubber molded product having practical rubber properties, a method for producing the same, and a reclaimed rubber molded product Can be provided.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ // Ｂ２９Ｋ 21:00 Ｂ２９Ｋ 21:00 Ｃ０８Ｌ 17:00 Ｃ０８Ｌ 17:00 (72)発明者 毛利 誠 愛知県愛知郡長久手町大字長湫字横道41 番地の１株式会社豊田中央研究所内 (72)発明者 臼杵 有光 愛知県愛知郡長久手町大字長湫字横道41 番地の１株式会社豊田中央研究所内 (72)発明者 村瀬 篤 愛知県愛知郡長久手町大字長湫字横道41 番地の１株式会社豊田中央研究所内 (72)発明者 佐藤 紀夫 愛知県愛知郡長久手町大字長湫字横道41 番地の１株式会社豊田中央研究所内 (72)発明者 鈴木 康之 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 大脇 雅夫 愛知県豊田市トヨタ町１番地 トヨタ自 動車株式会社内 (72)発明者 渡辺 一成 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (72)発明者 本多 秀亘 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (72)発明者 中島 克己 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (72)発明者 竹内 勝政 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (72)発明者 市川 昌好 愛知県西春日井郡春日町大字落合字長畑 １番地 豊田合成株式会社内 (56)参考文献 特開 平６−179215（ＪＰ，Ａ) 米国特許2461192（ＵＳ，Ａ) 欧州特許出願公開657263（ＥＰ，Ａ １) (58)調査した分野(Int.Cl.7，ＤＢ名) C08L 1/00 - 101/02 B29B 17/00 - 17/02 C08C 19/00 C08J 3/18 - 3/22 C08J 11/00 - 11/28 C08K 3/04 ────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 7 Identification code FI // B29K 21:00 B29K 21:00 C08L 17:00 C08L 17:00 (72) Inventor Makoto Mohri Nagakute-cho, Aichi-gun, Aichi-gun, Aichi Prefecture At 41, Chuo-Yokomichi, Toyota Central R & D Laboratories, Inc. (72) Inventor Arimitsu Usuki, at 41, Toyota-Chuo Research Laboratories, Ltd. 41 Toyota Chuo R & D Co., Ltd., No. 41, Nagachute-cho, Nagakute-cho, Aichi-gun (72) Inventor Norio Sato 41-41 Toyota Chuo Research Laboratories, Aichi-gun, Nagakute-cho, Ochi-cho, Aichi-gun, Japan Yasuyuki Suzuki 1 Toyota Town, Toyota City, Aichi Prefecture Within Toyota Motor Corporation (72) Inventor Masao Owaki 1 Toyota Town, Toyota City, Toyota City, Aichi Prefecture Automobile Co., Ltd. No. 1 Toyoda Gosei Co., Ltd. (72) Inventor Masayoshi Ichikawa 1 Ochiai Nagahata, Kasuga-cho, Nishi-Kasugai-gun, Aichi Prefecture Toyoda Gosei Co., Ltd. (56) References JP-A-6-179215 (JP, A) US Patent 2,461,192 (US , A) European Patent Application Publication 657263 (EP, A1) (58) Fields investigated (Int. Cl. 7 , DB name) C08L 1/00-101/02 B29B 17/00-17/02 C08C 19/00 C08J 3/18-3/22 C08J 11/00-11/28 C08K 3/04
Claims (7)
ｋｇ／ｃｍ２を加えて脱硫処理を行うことにより硫黄架
橋結合が切断されているとともに，粒径が１００ｎｍ以
下であるカーボンブラックを含有していることを特徴と
する再生脱硫ゴム。1. A waste vulcanized rubber having a shear stress of 10 to 150.
A reclaimed desulfurized rubber characterized in that sulfur crosslinking bonds are broken by desulfurization treatment by adding kg / cm 2 and carbon black having a particle size of 100 nm or less is contained.
クは，粒径が６０ｎｍ以下であることを特徴とする再生
脱硫ゴム。2. The reclaimed desulfurized rubber according to claim 1, wherein the carbon black has a particle size of 60 nm or less.
ブラックを予め添加した廃棄加硫ゴムを温度１８０〜３
５０℃，剪断応力１０〜１５０ｋｇ／ｃｍ2の条件にて
脱硫処理することにより溶融状態とすることを特徴とす
る再生脱硫ゴムの製造方法。3. A waste vulcanized rubber containing carbon black or having carbon black added thereto in advance at a temperature of 180 to 3
A method for producing a reclaimed desulfurized rubber, which is made into a molten state by performing desulfurization treatment under the conditions of 50 ° C. and a shear stress of 10 to 150 kg / cm 2 .
はジアリールジスルフィド，ジキシルジスルフィド，チ
オフェノール−酸化鉄のグループより選ばれる少なくと
も一種以上よりなる分解剤を添加して上記脱硫処理を行
うことを特徴とする再生脱硫ゴムの製造方法。4. The desulfurization treatment according to claim 3, wherein a decomposing agent comprising at least one selected from the group consisting of diaryl disulfide, dixyl disulfide, and thiophenol-iron oxide is added to the waste vulcanized rubber. A method for producing a reclaimed desulfurized rubber, comprising:
ゴムには再生油を添加して上記脱硫処理を行うことを特
徴とする再生脱硫ゴムの製造方法。5. A method according to claim 3 or 4, the manufacturing method of reproducing desulfurization rubber in the waste vulcanized rubber and performing the desulfurization process by adding reclaimed oil.
上記廃棄加硫ゴムがＥＰＤＭであり，これを温度２８０
〜３３０℃，剪断応力１０〜３０ｋｇ／ｃｍ2の条件に
て脱硫処理することを特徴とする再生脱硫ゴムの製造方
法。6. The one of the claims 3-5,
The waste vulcanized rubber is EPDM, which is heated to a temperature of 280.
A method for producing a reclaimed desulfurized rubber, wherein the desulfurization treatment is carried out at a temperature of from 330 to 330 ° C. and a shear stress of from 10 to 30 kg / cm 2 .
ブラックを予め添加した廃棄加硫ゴムにせん断応力１０
〜１５０ｋｇ／ｃｍ２を加えて脱硫処理を行うことによ
り硫黄架橋結合を切断するとともに上記カーボンブラッ
クの粒径を１００ｎｍ以下にしてなる再生脱硫ゴムを
得， 該再生脱硫ゴムを単独で用いるか，または該再生脱硫ゴ
ムと新材未加硫ゴムとを添加混合して再生ゴム原料とな
し， 次いで，該再生ゴム原料を所望形状に加硫，成形するこ
とを特徴とする再生ゴム成形品の製造方法。7. A waste vulcanized rubber containing carbon black or to which carbon black is added in advance has a shear stress of 10%.
１５０150 kg / cm 2 to perform desulfurization treatment to break sulfur cross-linking and obtain a reclaimed desulfurized rubber having a particle size of carbon black of 100 nm or less. The reclaimed desulfurized rubber may be used alone or A method for producing a reclaimed rubber molded product, comprising adding and mixing the reclaimed desulfurized rubber and a new unvulcanized rubber to produce a reclaimed rubber material, and then vulcanizing and molding the reclaimed rubber material into a desired shape. .
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP35296596A JP3272623B2 (en) | 1995-12-19 | 1996-12-12 | Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded product |
| US08/769,631 US6133413A (en) | 1995-12-19 | 1996-12-18 | Method of manufacturing devulcanized rubber using high temperature and shearing pressure |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34910995 | 1995-12-19 | ||
| JP7-349109 | 1995-12-19 | ||
| JP35296596A JP3272623B2 (en) | 1995-12-19 | 1996-12-12 | Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded product |
| EP97109846A EP0887372B1 (en) | 1995-12-19 | 1997-06-17 | Devulcanized rubber, method of manufacturing devulcanized rubber, and method of manufacturing reclaimed molded rubber products from devulcanized rubber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09227724A JPH09227724A (en) | 1997-09-02 |
| JP3272623B2 true JP3272623B2 (en) | 2002-04-08 |
Family
ID=27238234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP35296596A Expired - Lifetime JP3272623B2 (en) | 1995-12-19 | 1996-12-12 | Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded product |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3272623B2 (en) |
Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3308484B2 (en) * | 1998-02-19 | 2002-07-29 | 株式会社豊田中央研究所 | Rubber composition |
| JPH11209480A (en) * | 1998-01-27 | 1999-08-03 | Toyota Central Res & Dev Lab Inc | Rubber composite material |
| EP0931809B1 (en) * | 1998-01-26 | 2005-12-21 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Rubber composition and method for producing the same |
| JPH11235724A (en) * | 1998-02-19 | 1999-08-31 | Toyota Central Res & Dev Lab Inc | Manufacture of reclaimed rubber molded body |
| JP4104031B2 (en) * | 1998-10-28 | 2008-06-18 | 株式会社ブリヂストン | Recycled rubber |
| JP3982783B2 (en) * | 1998-10-28 | 2007-09-26 | 株式会社ブリヂストン | Recycling method of vulcanized rubber |
| DE69917733T2 (en) | 1998-10-28 | 2005-07-21 | Bridgestone Corp. | Regenerated rubber and process for regenerating vulcanized rubber |
| CA2375137C (en) | 1999-06-08 | 2006-11-07 | Kabushiki Kaisha Toyota Chuo Kenkyusho | Method of reclaiming crosslinked rubber |
| NL1015003C2 (en) * | 1999-09-28 | 2001-03-29 | Dsm Nv | Method for devulcanizing rubber with an amine. |
| JP4577801B2 (en) | 2000-02-29 | 2010-11-10 | 株式会社ブリヂストン | Recycled rubber and method for producing the same |
| JP2001323438A (en) * | 2000-05-12 | 2001-11-22 | Sumitomo Rubber Ind Ltd | Fender |
| JP2002020538A (en) * | 2000-07-13 | 2002-01-23 | Denki Kagaku Kogyo Kk | Powdery vulcanizable rubber composition |
| JP2002020544A (en) * | 2000-07-13 | 2002-01-23 | Denki Kagaku Kogyo Kk | Powdery vulcanized rubber composition |
| JP4338365B2 (en) * | 2002-07-02 | 2009-10-07 | 横浜ゴム株式会社 | Rubber composition for tire |
| JP5164384B2 (en) * | 2007-01-12 | 2013-03-21 | 株式会社ブリヂストン | Processed powder rubber, rubber composition and pneumatic tire using the same |
| PE20130987A1 (en) * | 2010-03-15 | 2013-09-26 | Phoenix Innovation Technology Inc | METHOD AND APPARATUS TO REGENERATE VULCANIZED RUBBER |
| KR101346667B1 (en) * | 2011-05-17 | 2014-01-02 | 이동원 | Method for recycling burr |
| JP6804203B2 (en) * | 2016-02-29 | 2020-12-23 | 株式会社ブリヂストン | Rubber composition and its manufacturing method |
-
1996
- 1996-12-12 JP JP35296596A patent/JP3272623B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09227724A (en) | 1997-09-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3272623B2 (en) | Reclaimed desulfurized rubber, method for producing the same, and method for producing recycled rubber molded product | |
| EP0931809B1 (en) | Rubber composition and method for producing the same | |
| US4481335A (en) | Rubber compositions and method | |
| RU2162475C2 (en) | Method of producing bitumen composition and bitumen composition | |
| De et al. | Processing and material characteristics of a reclaimed ground rubber tire reinforced styrene butadiene rubber | |
| US6133413A (en) | Method of manufacturing devulcanized rubber using high temperature and shearing pressure | |
| US5556888A (en) | Rubber compounds containing vulcanized scrap rubber, methods of manufacturing such rubber compounds | |
| EP0887372B1 (en) | Devulcanized rubber, method of manufacturing devulcanized rubber, and method of manufacturing reclaimed molded rubber products from devulcanized rubber | |
| EP1034220A1 (en) | Bituminous compositions prepared with process treated vulcanized rubbers | |
| JP2004536956A (en) | Method for recycling scrap-derived rubber | |
| KR910002439B1 (en) | Particulate elastomeric composition | |
| US6576680B2 (en) | Reclaimed rubber and process for producing the same | |
| KR100867417B1 (en) | Apparatus and Method for devulcanization and deodorization of Reclaimed Rubber Powder | |
| US11034822B2 (en) | Method for producing recycled thermoplastic rubber masterbatch with improved green strength and tack | |
| JP3308484B2 (en) | Rubber composition | |
| JP3319715B2 (en) | How to recycle hard-to-recycle rubber | |
| JP2001055472A (en) | Rubber composition containing reclaimed epdm rubber and production of the composition | |
| JPH11209512A (en) | Reclamation of rubber | |
| JP3404280B2 (en) | Rubber modification method | |
| JP3290923B2 (en) | Recycling method of composite vulcanized rubber | |
| JP2004035690A (en) | Rubber composition for tire | |
| JPH11209480A (en) | Rubber composite material | |
| JPH11228706A (en) | Manufacture of rubber-thermoplastic resin composite material | |
| JPH10212374A (en) | Rubber containing microdispersed filler and its production |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080125 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090125 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100125 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110125 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120125 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120125 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130125 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130125 Year of fee payment: 11 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313532 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130125 Year of fee payment: 11 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130125 Year of fee payment: 11 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140125 Year of fee payment: 12 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |