JP2001089603A - Reclaimed rubber composition - Google Patents
Reclaimed rubber compositionInfo
- Publication number
- JP2001089603A JP2001089603A JP27271399A JP27271399A JP2001089603A JP 2001089603 A JP2001089603 A JP 2001089603A JP 27271399 A JP27271399 A JP 27271399A JP 27271399 A JP27271399 A JP 27271399A JP 2001089603 A JP2001089603 A JP 2001089603A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- reclaimed
- rubber composition
- weight
- less
- 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
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
- Y02W30/52—Mechanical processing of waste for the recovery of materials, e.g. crushing, shredding, separation or disassembly
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はタイヤなどの加硫ゴ
ムを再生した再生ゴムを配合したゴム組成物に関し、更
に詳しくはシート加工性及び破断特性などの加硫物性に
優れた再生ゴム配合ゴム組成物に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber composition containing a reclaimed rubber obtained by reclaiming a vulcanized rubber such as a tire, and more particularly to a reclaimed rubber compounded rubber excellent in vulcanized properties such as sheet workability and breaking characteristics. Composition.
【０００２】[0002]
【従来の技術】タイヤなどの加硫されたゴム製品の廃棄
物からゴムを回収して再使用することは行われており、
例えばリクレームゴム、粉末ゴムなどの再生ゴムが市販
されている。しかし、現在市販されている、これらの再
生ゴムを未加硫ゴム組成物に配合して再使用した場合に
は、得られるゴム組成物のシート加工性と破断特性等の
加硫物性とを両立させることができないという問題があ
り、工場でシート切れを起こすことがある。2. Description of the Related Art It has been practiced to recover and reuse rubber from the waste of vulcanized rubber products such as tires.
For example, recycled rubber such as reclaim rubber and powder rubber is commercially available. However, when these reclaimed rubbers, which are currently commercially available, are blended with an unvulcanized rubber composition and reused, the resulting rubber composition achieves both the sheet processability and the vulcanized properties such as breaking characteristics. There is a problem that it is not possible to cause the sheet to run out at the factory.
【０００３】加硫ゴムの再生方法についてはいくつかの
提案があり、特に、粉砕方法について種々の工夫がなさ
れていいる。例えば特開昭５６−２４１２２号公報には
１，４−ポリブタジエン加硫ゴムに温度５０〜１８０℃
で、機械的せん断力により、加硫ゴムを細断することが
提案されている。[0003] There are several proposals for a method for regenerating vulcanized rubber. In particular, various measures have been devised for a pulverizing method. For example, JP-A-56-24122 discloses that 1,4-polybutadiene vulcanized rubber has a temperature of 50 to 180 ° C.
It has been proposed to shred vulcanized rubber by mechanical shearing force.
【０００４】[0004]
【発明が解決しようとする課題】従って、本発明はシー
ト加工性を破断特性などの加硫物性とに優れた、再生ゴ
ムを配合したゴム組成物を提供することを目的とする。SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a rubber composition containing recycled rubber, which is excellent in vulcanizability such as breakability and sheet processability.
【０００５】[0005]
【課題を解決するための手段】本発明に従えば、カーボ
ンブラックを含み、スチレンブタジエン共重合体ゴム
（ＳＢＲ）もしくはＳＢＲを７０重量％以上含むジエン
系ゴムの加硫ゴムをロール粉砕した再生ゴムを含むゴム
組成物であって、再生ゴムのポリマーゲル膨潤度が３５
０％以上５００％未満で、且つポリマーゾル分率が５重
量％未満、更に、再生ゴム粒子の切断面を光学顕微鏡で
観察した時の再生ゴムの平均粒径が１５０μｍ以下で、
粒径分布σが６０μｍである再生ゴム組成物が提供され
る。According to the present invention, a reclaimed rubber obtained by roll-pulverizing a styrene-butadiene copolymer rubber (SBR) or a vulcanized rubber of a diene rubber containing 70% by weight or more of SBR containing carbon black. A rubber composition comprising a recycled rubber having a polymer gel swelling degree of 35
0% or more and less than 500%, and the polymer sol fraction is less than 5% by weight, and the average particle size of the reclaimed rubber when the cut surface of the reclaimed rubber particles is observed with an optical microscope is 150 μm or less,
A recycled rubber composition having a particle size distribution σ of 60 μm is provided.
【０００６】本発明に従えば、ジエン系ゴム１００重量
部を含む未加硫ゴム組成物に、前記再生ゴム組成物に式
（Ｉ）及び（II）According to the present invention, an unvulcanized rubber composition containing 100 parts by weight of a diene rubber is added to the reclaimed rubber composition by the formulas (I) and (II).
【数２】 を満足する硫黄及び加硫促進剤の加硫系を配合して成る
加硫系マスターバッチを、再生ゴム配合ゴム組成物中の
再生ゴム量が５〜３０重量部となる量で配合してなる再
生ゴム配合ゴム組成物が提供される。(Equation 2) A vulcanization masterbatch comprising a vulcanization system of sulfur and a vulcanization accelerator satisfying the above is blended in such an amount that the amount of the reclaimed rubber in the reclaimed rubber compounded rubber composition is 5 to 30 parts by weight. A recycled rubber compounded rubber composition is provided.
【０００７】[0007]
【発明の実施の形態】以上の通り、本発明に従えば、加
硫廃棄ゴムをある条件下でロールで粉砕することによ
り、ポリマーゲル膨潤度が３５０％以上５００％未満、
好ましくは４００〜４５０％で、ポリマーゾル分率が５
％未満で、好ましくは１％未満で且つコンパウンド中で
再生ゴム粒子の切断面を光学顕微鏡で観測したときの粒
径実測値が１５０μｍ以下、粒径分布がσ＝６０μｍ以
下の再生ゴム組成物を得ることができる。この粉砕法
で、得られる再生ゴムを配合したゴム組成物は、高い物
性保持率と良好なシート加工性を両立させることができ
る。As described above, according to the present invention, the vulcanized waste rubber is pulverized with a roll under a certain condition to obtain a polymer gel swelling degree of 350% or more and less than 500%.
Preferably it is 400 to 450% and the polymer sol fraction is 5
%, Preferably less than 1%, and a reclaimed rubber composition having a measured particle size of 150 μm or less and a particle size distribution of σ = 60 μm or less when a cut surface of the reclaimed rubber particles is observed in an optical microscope with a compound. Obtainable. The rubber composition containing the reclaimed rubber obtained by this pulverization method can achieve both high physical property retention and good sheet processability.
【０００８】本発明によれば、更に再生されたゴムを加
硫系マスターバッチにした後に、未加硫のジエン系ゴム
へ配合することによって、更にシート加工性が改善され
たゴムシートを得ることができ、また少ない加硫剤の量
で室温物性を改良でき、高温、老化後の物性への悪影響
も少ない。According to the present invention, a rubber sheet having further improved sheet processability can be obtained by forming a regenerated rubber into a vulcanized masterbatch and then compounding it with an unvulcanized diene rubber. The properties at room temperature can be improved with a small amount of vulcanizing agent, and the adverse effects on the properties after high temperature and aging are small.
【０００９】本発明において使用する再生ゴムの原料と
なる加硫廃棄物ゴムはカーボンブラック（通常２０〜５
０重量％）を含み、ゴム分としてＳＢＲ１００重量％又
はＳＢＲ７０重量％以上、好ましくは９０重量％以上を
他のジエン系ゴム（例えば天然ゴム（ＮＲ）、各種ポリ
ブタジエンゴム（ＢＲ）、合成ポリイソプレンゴム（Ｉ
Ｒ））３０重量％以下を含むものである。使用するゴム
分のＳＢＲ含量が７０重量％未満では粉砕処理時間が長
くなるおそれがあるので好ましくない。The vulcanized waste rubber used as the raw material of the recycled rubber used in the present invention is carbon black (usually 20 to 5).
0% by weight), and 100% by weight or more of SBR or 70% by weight or more of SBR, preferably 90% by weight or more of other diene rubbers (for example, natural rubber (NR), various polybutadiene rubbers (BR), and synthetic polyisoprene rubber). (I
R)) not more than 30% by weight. If the SBR content of the rubber used is less than 70% by weight, the pulverization treatment time may be long, which is not preferable.
【００１０】本発明に従えば、前記した加硫廃棄物ゴム
をロールで粉砕して得ることができる。ロール粉砕方法
には特に限定はないが、例えば８×２８（インチ）ロー
ルなどの適当なロールを用いて、例えば６０℃程度に冷
却しながら、ロール間隔を好ましくはゼロとして通常の
方法で粉砕することができる。According to the present invention, the above-mentioned vulcanized waste rubber can be obtained by grinding with a roll. Although there is no particular limitation on the roll grinding method, for example, a suitable roll such as an 8 × 28 (inch) roll is used, and the roll is preferably cooled to, for example, about 60 ° C., and the roll interval is preferably set to zero. be able to.
【００１１】本発明に従った再生ゴム組成物は、ジエン
系ゴム１００重量％を含む未加硫ゴム組成物に、式
（Ｉ）及び（II）The reclaimed rubber composition according to the present invention is obtained by adding an unvulcanized rubber composition containing 100% by weight of a diene rubber to a compound of the formula (I) or (II).
【００１２】[0012]
【数３】 (Equation 3)
【００１３】を構造する硫黄及び加硫促進剤の加硫系を
配合して得られる加硫系マスターバッとして、この再生
ゴム配合ゴム組成物中のゴム量が５〜３０重量部、好ま
しくは１０〜２０重量部となる量で配合して再生ゴム配
合ゴム組成物を得ることができる。As a vulcanized masterbatch obtained by compounding a vulcanizing system of sulfur and a vulcanization accelerator, the amount of rubber in the reclaimed rubber compounded rubber composition is 5 to 30 parts by weight, preferably 10 to 10 parts by weight. By blending in an amount of up to 20 parts by weight, a recycled rubber compounded rubber composition can be obtained.
【００１４】ここで用いるジエン系ゴムとしては、従来
から各種ゴム組成物に一般的に配合されている任意のジ
エン系ゴム、例えば天然ゴム（ＮＲ）、ポリイソプレン
ゴム（ＩＲ）、各種スチレン−ブタジエン共重合体ゴム
（ＳＢＲ）、各種ポリブタジエンゴム（ＢＲ）、アクリ
ロニトリル−ブタジエン共重合体ゴム（ＮＢＲ）、ブチ
ルゴム（ＩＩＲ）などのジエン系ゴムを単独又は任意の
ブレンドとして使用することができる。The diene rubber used here may be any diene rubber conventionally compounded in various rubber compositions, for example, natural rubber (NR), polyisoprene rubber (IR), various styrene-butadiene. Diene rubbers such as copolymer rubber (SBR), various polybutadiene rubbers (BR), acrylonitrile-butadiene copolymer rubber (NBR) and butyl rubber (IIR) can be used alone or as an arbitrary blend.
【００１５】本発明に係るゴム組成物には更に一般的な
補強剤が配合される。補強剤としては、例えばカーボン
ブラック、シリカなどがあげられ、ジエン系ゴム１００
重量部に対し、補強剤として好ましくは５０重量部以
上、更に好ましくは７０〜１００重量部配合する。この
配合量が少な過ぎるとゴム組成物として必要な補強性が
得られないので好ましくない。またシリカを使用する場
合には、従前通り、シランカップリング剤を併用するの
が好ましい。The rubber composition according to the present invention further contains a general reinforcing agent. Examples of the reinforcing agent include carbon black and silica.
Preferably 50 parts by weight or more, more preferably 70 to 100 parts by weight, of the reinforcing agent is blended with respect to parts by weight. If the amount is too small, the reinforcing properties required for the rubber composition cannot be obtained, which is not preferable. When silica is used, it is preferable to use a silane coupling agent in combination as before.
【００１６】本発明に係るゴム組成物には、前記した必
須成分に加えて、加硫又は架橋剤、加硫又は架橋促進
剤、各種オイル、老化防止剤、可塑性剤などのタイヤ
用、その他一般ゴム用に一般的に配合されている各種添
加剤を配合することができ、かかる配合物は一般的な方
法で混練、加硫して組成物とし、加硫又は架橋するのに
使用することができる。これらの添加剤の配合量も本発
明の目的に反しない限り、従来の一般的な配合量とする
ことができる。In the rubber composition according to the present invention, in addition to the above-mentioned essential components, vulcanizing or cross-linking agents, vulcanizing or cross-linking accelerators, various oils, anti-aging agents, plasticizers, etc. Various additives generally compounded for rubber can be compounded, and such compounds can be kneaded and vulcanized into a composition by a general method, and used for vulcanization or crosslinking. it can. The compounding amounts of these additives can also be conventional general compounding amounts as long as they do not contradict the object of the present invention.
【００１７】[0017]
【実施例】以下、実施例によって本発明を更に説明する
が、本発明の範囲をこれらの実施例に限定するものでな
いことは言うまでもない。参考例、実施例１〜６及び比較例１〜６ 以下の各例の配合に用いた表Ｉに示す配合成分（重量
部）は、粉砕ゴム（再生ゴム）を除いて以下の市販品を
使用した。また物性測定方法も以下に示す通りである。EXAMPLES The present invention will be further described with reference to the following examples, but it goes without saying that the scope of the present invention is not limited to these examples. The following commercially available products are used for the components (parts by weight) shown in Table I used in the formulations of Reference Examples, Examples 1 to 6 and Comparative Examples 1 to 6 except for ground rubber (recycled rubber). did. The physical property measurement method is as shown below.
【００１８】ＳＢＲ：日本ゼオン製乳化重合ＳＢＲ，Ｎ
ｉｐｏｌ １５０２（スチレン含量２３．５％） カーボンブラック：ＨＡＦ（東海カーボン製シースト
Ｎ） 老化防止剤：Ｓ−１３（大内信興製ノクラック６Ｃ） 加硫促進剤：ＮＳ（大内信興製ノクセラーＮＳ−Ｆ） リクレームゴム（再生ゴム）：（オカムラゴム工業製タ
イヤリクレームゴム）市販粉末ゴム（再生ゴム）（３０
メッシュ及び１００メッシュ）：３０メッシュ（アサヒ
再生ゴム製アサヒ３０）、１００メッシュ(Rouse Rubbe
r Industries製ＹＧＦ１００）SBR: Emulsion polymerization SBR, N manufactured by Zeon Corporation
ipol 1502 (styrene content 23.5%) Carbon black: HAF (Tokai Carbon Seast N) Antioxidant: S-13 (Nocrack 6C, Ouchi Shinko) Vulcanization accelerator: NS (Nouchira NS-, Ouchi Shinko) F) Reclaimed rubber (recycled rubber): (Okamura Rubber Industries tire reclaimed rubber) Commercial powder rubber (recycled rubber) (30)
Mesh and 100 mesh): 30 mesh (Asahi 30 made of Asahi recycled rubber), 100 mesh (Rouse Rubbe
r Industries YGF100)
【００１９】二軸粉末ゴム及びロール粉砕ゴムは以下の
通りにして製造した。The biaxial powder rubber and the roll pulverized rubber were produced as follows.
【００２０】二軸粉砕粉末ゴム（再生ゴム）の製造 参考例及び下表に示す配合の加硫ゴムをそれぞれ約７mm
に粗粉砕し、参考例と下表ゴムの重量比７０／３０でブ
レンドしたものを用いて、表Ｉに示す粉砕条件に従い、
二軸押出機により微粉砕した。 ＮＲ（ＲＳＳ＃１） ４５（phr) ＢＲ（Ｎｉｐｏｌ１２２０ 日本ゼオン） ５５ カーボンブラック（ＦＥＦ 東海カーボンシースト１１６） ５０ アロマ系プロセスオイル １０ 老化防止剤（Ｓ−１３ 大内信興ノクラック６Ｃ） ２．５ ステアリン酸 １ 酸化亜鉛 ２．５ ワックス ２ 硫黄 １．５ 加硫促進剤（ＣＺ 大内信興ノクセラーＣＺ−Ｇ） ０．５A biaxial ground powder rubber (reclaimed rubber) was prepared by mixing a reference example and a vulcanized rubber having the composition shown in the following table to about 7 mm each.
Using a material obtained by roughly pulverizing the mixture and blending the rubber in the reference example and the following table in a weight ratio of 70/30, according to the pulverization conditions shown in Table I,
It was pulverized with a twin screw extruder. NR (RSS # 1) 45 (phr) BR (Nipol 1220 Zeon) 55 Carbon black (FEF Tokai Carbon Seast 116) 50 Aroma-based process oil 10 Anti-aging agent (S-13 Ouchi Shinko Nocrack 6C) 2.5 Stearic acid 1 Zinc oxide 2.5 Wax 2 Sulfur 1.5 Vulcanization accelerator (CZ Ouchi Shinko Noxeller CZ-G) 0.5
【００２１】ロール粉砕ゴム（再生ゴム）の製造 参考例及び上表に示す配合の加硫ゴムをそれぞれ約７mm
に粗粉砕し、参考例と上表ゴムの重量比７０／３０でブ
レンドしたものを用いて、前記したロール粉砕機により
微粉砕した。なお、ロール粉砕回数は表Ｉに示した。 Rolled rubber (recycled rubber) Reference Example and vulcanized rubber having the composition shown in the above table were each about 7 mm.
The mixture was then coarsely pulverized and finely pulverized with the above-mentioned roll pulverizer using a blend obtained by blending the reference example and the upper rubber in a weight ratio of 70/30. Table I shows the number of times the rolls were crushed.
【００２２】加硫系マスター：粉末ゴムに表Ｉに示す硫
黄量を添加し、ロールにて数切り返す事により混合して
作成した。なお、調整硫黄量（重量部）は式（Ｉ）及び
（II）：Vulcanized master: A vulcanized master was prepared by adding the amount of sulfur shown in Table I to powdered rubber and cutting it back with a roll to mix. The adjusted sulfur amount (parts by weight) is determined by the formulas (I) and (II):
【数４】 に従って決定した。(Equation 4) Determined according to
【００２３】Ｋ1 値：加硫系マスターバッチを作成する
際に、マスターバッチに添加する硫黄量を調整するとき
の係数を表す。例えば硫黄量２phr の未加硫ゴム中へ硫
黄マスターバッチ２０phr を添加する場合、マスターバ
ッチとして添加する硫黄量が０．０４phr 以上（Ｋ1 が
０．２以上）０．４phr 以下（Ｋ1 が２以下）であれ
ば、満足できる加硫物性が得られる。少なすぎると粉砕
（再生）ゴムを添加した事による破断強度の低下が大き
く、逆に多すぎると熟時物性低下が大きくなってしま
う。K 1 value: A coefficient for adjusting the amount of sulfur to be added to the vulcanized master batch when preparing the vulcanized master batch. For example, when 20 phr of a sulfur master batch is added to an unvulcanized rubber having a sulfur content of 2 phr, the amount of sulfur added as a master batch is 0.04 phr or more (K 1 is 0.2 or more) and 0.4 phr or less (K 1 is 2 phr). If below), satisfactory vulcanization properties can be obtained. If the amount is too small, the rupture strength due to the addition of the pulverized (regenerated) rubber is large, and if it is too large, the deterioration in physical properties at the time of ripening becomes large.
【００２４】ポリマーゲル膨潤度（％）及びゾル分率
（％）の測定法 サンプル再生ゴム粉末粒子約０．３ｇをハリス籠（１０
０メッシュ）へ投入し、これをトルエン２００mLで満た
した密閉ガラス容器に侵してゴム粒子を膨潤せしめ、ト
ルエンに不溶のゴム粒子の膨潤後の重量（ｇ）及びそれ
を乾燥させた後の重量（ｇ）を測定し、以下の式に従っ
てポリマーゲル膨潤度及びゾル分率を求めた。 ポリマーゲル膨潤度（％）＝（膨潤後のポリマー重量−
乾燥後のポリマー重量）／乾燥後のポリマー重量×１０
０ ゾル分率（％）＝（全ポリマー重量／乾燥後のポリマー
重量）／全ポリマー重量＊１００ Polymer gel swelling degree (%) and sol fraction
(%) Measurement method About 0.3 g of the sample reclaimed rubber powder particles was
0 mesh), and infiltrate a sealed glass container filled with 200 mL of toluene to swell the rubber particles. The weight (g) of the rubber particles insoluble in toluene after swelling and the weight after drying (g) g) was measured, and the degree of swelling of the polymer gel and the sol fraction were determined according to the following equations. Swelling degree of polymer gel (%) = (weight of polymer after swelling−
(Weight of polymer after drying) / weight of polymer after drying × 10
0 Sol fraction (%) = (total polymer weight / polymer weight after drying) / total polymer weight * 100
【００２５】シート加工性の評価 １）ゴム肌 得られたゴム組成物を未加硫の状態でロールにかけてシ
ートにし、そのゴム表面肌の粗さを走査型レーザー顕微
鏡によって求め、元のゴムに対する変化率（ゴム組成物
粗さ／元ゴム粗さ＊１００）によって以下の基準で評価
した。指数 元のゴムに対する変化率 ５ ５０％未満 ４ ５０％以上１００％未満 ３ １００％以上１５０％未満 ２ １５０％以上２００％未満 １ ２００％以上 Evaluation of sheet processability 1) Rubber skin The obtained rubber composition was rolled in an unvulcanized state to form a sheet, and the roughness of the rubber surface skin was determined by a scanning laser microscope to determine the change from the original rubber. The ratio was evaluated based on the following criteria (roughness of rubber composition / roughness of original rubber * 100). Index change rate relative to original rubber 5 Less than 50% 4 50% or more and less than 100% 3 100% or more and less than 150% 2 150% or more and less than 200% 1 200% or more
【００２６】２）耳切れ上の方法で得られたゴムシート
１ｍ当りの耳切れ数を数え、以下の基準で評価した。評価 耳切れ数 ○ ５以下 △ ６〜10 × 11以上加硫物性（室温２５℃） 加硫後のゴムＴｂ（破断時引張純度）及びＥｂ（破断時
伸び）をそれぞれの温度でＪＩＳ−Ｋ−６２５１に記載
の方法によって測定し、元のゴムに対する保持率から以
下の基準で評価した。指数 元のゴムに対する保持率 ５ ９５％以上 ４ ９０％以上９５％未満 ３ ８５％以上９０％未満 ２ ８０％以上８５％未満 １ ８０％未満2) The number of cuts per meter of the rubber sheet obtained by the above method was counted and evaluated according to the following criteria. Evaluation number of cuts ○ 5 or less △ 6 to 10 × 11 or more Vulcanization physical properties (room temperature 25 ° C.) After vulcanization, the rubber Tb (tensile purity at break) and Eb (elongation at break) at each temperature according to JIS-K- It was measured by the method described in No. 6251, and was evaluated based on the following criteria based on the retention to the original rubber. Retention rate for rubber of index original 5 95% or more 4 90% or more and less than 95% 3 85% or more and less than 90% 2 80% or more and less than 85% 1 Less than 80%
【００２７】表１に示す配合（重量部）に従って、硫黄
及び加硫促進剤を除いて、常法に従ってバンバリーミキ
サーで混練し、これに実施例５〜６及び比較例６では加
硫系マスターバッチを加え、続いてオープンロールにて
硫黄及び加硫促進剤を加えて１５０℃で３０分間加硫し
た。得られた組成物の物性は前記方法で評価し、結果を
表Ｉに示す。According to the composition (parts by weight) shown in Table 1, except for sulfur and the vulcanization accelerator, the mixture was kneaded with a Banbury mixer according to a conventional method. , Followed by adding sulfur and a vulcanization accelerator using an open roll, followed by vulcanization at 150 ° C. for 30 minutes. The physical properties of the obtained composition were evaluated by the above methods, and the results are shown in Table I.
【００２８】[0028]
【表１】 [Table 1]
【００２９】[0029]
【表２】 [Table 2]
【００３０】[0030]
【発明の効果】以上の実施例に示したように、本発明に
従えば、再生ゴム配合ゴム組成物のシート加工性が改善
されるので、従来の市販再生粉末ゴムで発生したような
シート切れの問題が起こらない。また従来のリクレーム
ゴム配合物、二軸粉砕ゴム配合物のような加硫物性の低
下もなく、充填剤として、ゴム屑、廃棄タイヤを再利用
することが可能になる。As shown in the above examples, according to the present invention, since the sheet processability of the reclaimed rubber compounded rubber composition is improved, the sheet breakage as occurs with the conventional commercially available reclaimed powder rubber is obtained. Problem does not occur. Also, there is no decrease in vulcanization properties as in conventional reclaimed rubber compounds and biaxially ground rubber compounds, and it is possible to reuse rubber scraps and waste tires as fillers.
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 4F301 AA06 AB02 BA21 BC16 BE30 BF12 BF31 4J002 AC012 AC022 AC062 AC072 AC081 AC082 AC131 BB182 BC051 BC052 BG102 DA036 DA047 DJ016 FA081 FD016 FD025 FD147 FD158 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 4F301 AA06 AB02 BA21 BC16 BE30 BF12 BF31 4J002 AC012 AC022 AC062 AC072 AC081 AC082 AC131 BB182 BC051 BC052 BG102 DA036 DA047 DJ016 FA081 FD016 FD025 FD147 FD158
Claims (2)
ジエン共重合体ゴム（ＳＢＲ）もしくはＳＢＲを７０重
量％以上含むジエン系ゴムの加硫ゴムをロール粉砕した
再生ゴムを含むゴム組成物であって、再生ゴムのポリマ
ーゲル膨潤度が３５０％以上５００％未満で、且つポリ
マーゾル分率が５重量％未満、更に、再生ゴム粒子の切
断面を光学顕微鏡で観察した時の再生ゴムの平均粒径が
１５０μｍ以下で、粒径分布σが６０μｍである再生ゴ
ム組成物。1. A rubber composition comprising recycled rubber obtained by roll-milling styrene-butadiene copolymer rubber (SBR) or vulcanized rubber of diene rubber containing 70% by weight or more of SBR containing carbon black. The polymer gel swelling degree of the rubber is 350% or more and less than 500%, the polymer sol fraction is less than 5% by weight, and the average particle size of the reclaimed rubber is 150 μm when the cut surface of the reclaimed rubber particles is observed with an optical microscope. In the following, a recycled rubber composition having a particle size distribution σ of 60 μm.
ゴム組成物に、請求項１に記載の再生ゴム組成物に式
（Ｉ）及び（II） 【数１】 を満足する硫黄及び加硫促進剤の加硫系を配合して成る
加硫系マスターバッチを、再生ゴム配合ゴム組成物中の
再生ゴム量が５〜３０重量部となる量で配合してなる再
生ゴム配合ゴム組成物。2. An unvulcanized rubber composition containing 100 parts by weight of a diene rubber and a reclaimed rubber composition according to claim 1 having formulas (I) and (II). A vulcanization masterbatch comprising a vulcanization system of sulfur and a vulcanization accelerator satisfying the above is blended in such an amount that the amount of the reclaimed rubber in the reclaimed rubber compounded rubber composition is 5 to 30 parts by weight. Recycled rubber compounded rubber composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27271399A JP2001089603A (en) | 1999-09-27 | 1999-09-27 | Reclaimed rubber composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27271399A JP2001089603A (en) | 1999-09-27 | 1999-09-27 | Reclaimed rubber composition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001089603A true JP2001089603A (en) | 2001-04-03 |
Family
ID=17517760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27271399A Pending JP2001089603A (en) | 1999-09-27 | 1999-09-27 | Reclaimed rubber composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001089603A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006213803A (en) * | 2005-02-02 | 2006-08-17 | Toyo Tire & Rubber Co Ltd | Rubber composition for pneumatic tire |
| WO2008099763A1 (en) * | 2007-02-02 | 2008-08-21 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire thread |
| JP2009269961A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Rubber composition for bead filler |
| JP2009269962A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Rubber composition for sidewall |
| WO2014124441A1 (en) * | 2013-02-11 | 2014-08-14 | Lehigh Technologies, Inc. | Elastomeric compositions comprising reclaimed elastomer material |
| US11714220B2 (en) | 2015-10-30 | 2023-08-01 | Transitions Optical, Inc. | Optical article with gradient light influencing properties and method of making the same |
-
1999
- 1999-09-27 JP JP27271399A patent/JP2001089603A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006213803A (en) * | 2005-02-02 | 2006-08-17 | Toyo Tire & Rubber Co Ltd | Rubber composition for pneumatic tire |
| WO2008099763A1 (en) * | 2007-02-02 | 2008-08-21 | The Yokohama Rubber Co., Ltd. | Rubber composition for tire thread |
| JPWO2008099763A1 (en) * | 2007-02-02 | 2010-05-27 | 横浜ゴム株式会社 | Rubber composition for tire tread |
| JP2009269961A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Rubber composition for bead filler |
| JP2009269962A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Rubber composition for sidewall |
| WO2014124441A1 (en) * | 2013-02-11 | 2014-08-14 | Lehigh Technologies, Inc. | Elastomeric compositions comprising reclaimed elastomer material |
| US11714220B2 (en) | 2015-10-30 | 2023-08-01 | Transitions Optical, Inc. | Optical article with gradient light influencing properties and method of making the same |
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