PROBLEM TO BE SOLVED: To provide a method for producing a wet master batch capable of reducing the Mooney viscosity of a wet master batch and further reducing the pyrogenicity of a rubber composition using a wet master batch.SOLUTION: Provided is a method for producing a wet master batch comprising: a solidification step where a reinforcement filler-containing slurry solution and a rubber latex solution are charged to the same mixed solution, is thereafter mixed and is solidified to produce a reinforcement filler-containing rubber solidified matter; and a dehydration-plasticization step where the reinforcement filler-containing rubber solidified matter is dehydrated and plasticized. In the dehydration-plasticization step, at least one kind of hydrazine compound with a fundamental skeleton in which benzothiazole and hydrazine are coupled and a hydrazine compound with a fundamental skeleton in which benzothiazone and a hydrazone are coupled, particularly, preferably, 2-hydrazinobenzothiazole or acetonebenzothiazolyl-2-hydrazone is added.SELECTED DRAWING: None

    【課題】ウエットマスターバッチのムーニー粘度を低減し、ウエットマスターバッチを用いたゴム組成物の発熱性を更に低減できるウエットマスターバッチの製造方法の提供。【解決手段】補強性充填剤を含有するスラリー溶液とゴムラテックス溶液を、同一の混合容器に仕込んだ後、混合し凝固させて補強性充填剤含有ゴム凝固物を製造する凝固工程と、前記補強性充填剤含有ゴム凝固物を脱水し可塑化する脱水・可塑化工程を含み、前記脱水・可塑化工程において、ベンゾチアゾールとヒドラジンが結合した基本骨格を持つヒドラジン化合物化合物及びベンゾチアゾールとヒドラゾンが結合した基本骨格を持つヒドラジン化合物から選択された少なくとも1種のヒドラジン化合物、特に好ましくは2−ヒドラジノベンゾチアゾール又はアセトンベンゾチアゾリル−2−ヒドラゾンを添加するウエットマスターバッチの製造方法。【選択図】なし


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    Title :

    METHOD FOR PRODUCING WET MASTER BATCH, METHOD FOR PRODUCING RUBBER COMPOSITION AND METHOD FOR PRODUCING PNEUMATIC TIRE


    Additional title:

    ウエットマスターバッチの製造方法、ゴム組成物の製造方法及び空気入りタイヤの製造方法


    Contributors:

    Publication date :

    2017-06-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    C08J Verarbeitung , WORKING-UP / B60C VEHICLE TYRES , Fahrzeugreifen



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