METHOD FOR PRODUCING RUBBER WET MASTER BATCH

• Main Author: KONNO YUYA
• Format: Patent
• Language: English; Japanese
• Published: 12.07.2018
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

PROBLEM TO BE SOLVED: To provide a method for producing a rubber wet master batch where rubber powder is uniformly dispersed which can prevent deterioration of abrasion resistance and flexural fatigue resistance of a vulcanized rubber accompanied by blending of the rubber powder.SOLUTION: A method for producing a rubber wet master batch includes: a step (I) of adding at least a part of a synthesized styrene-butadiene rubber latex solution to a dispersion solvent when dispersing a filler to the dispersion solvent to produce a slurry solution containing the filler to which rubber latex particles are attached; a step (II) of mixing the slurry solution and the residual rubber latex solution to produce a filler-containing rubber latex solution to which the rubber latex particles are attached; a step (III) of coagulating the filler-containing rubber latex solution to which the rubber latex particles are attached to produce a rubber coagulated material; and a step (IV) of dehydrating and drying the rubber coagulated material, and mixes the rubber powder in any of the steps (I) to (IV).SELECTED DRAWING: None 【課題】ゴム粉が均一に分散したゴムウエットマスターバッチであって、ゴム粉を配合することに伴う加硫ゴムの耐摩耗性および屈曲疲労性の悪化を防止可能なゴムウエットマスターバッチの製造方法を提供すること。【解決手段】充填材を分散溶媒中に分散させる際に、合成スチレンブタジエンゴムラテックス溶液の少なくとも一部を添加することにより、ゴムラテックス粒子が付着した充填材を含有するスラリー溶液を製造する工程（Ｉ）と、スラリー溶液と、残りのゴムラテックス溶液とを混合して、ゴムラテックス粒子が付着した充填材含有ゴムラテックス溶液を製造する工程（ＩＩ）と、ゴムラテックス粒子が付着した充填材含有ゴムラテックス溶液を凝固してゴム凝固物を製造する工程（ＩＩＩ）と、ゴム凝固物を脱水・乾燥する工程（ＩＶ）とを含み、工程（Ｉ）〜（ＩＶ）のいずれかの工程で、ゴム粉を混合するゴムウエットマスターバッチの製造方法。【選択図】 なし