METHOD FOR PRODUCING RUBBER COMPOSITION

• Main Author: KOMIYA YUKI
• Format: Patent
• Language: English; Japanese
• Published: 13.02.2020
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a method for producing a rubber composition to be a raw material for vulcanized rubber with excellent low heat build-up properties.SOLUTION: A method for producing a rubber composition has a first mixture step of mixing at least a rubber component, carbon black and a compound described in the formula (I) (where Rand Reach denote a hydrogen atom, or a C1-20 alkyl group, alkenyl group or alkynyl group, Rand Rmay be the same or different. Mdenotes a sodium ion, potassium ion or lithium ion) and, after the first mixture step, a second mixture step of mixing further at least wax. As the total amount of the rubber component is 100 pts.mass, the content of the compound described in the formula (I) is 0.1 pts.mass or more and 0.75 pts.mass or less.SELECTED DRAWING: None 【課題】低発熱性に優れた加硫ゴムの原料となるゴム組成物の製造方法の提供。【解決手段】少なくともゴム成分、カーボンブラック及び下記式（Ｉ）に記載の化合物：（式（Ｉ）中、Ｒ１およびＲ２は、水素原子、ならびに炭素数１〜２０のアルキル基、アルケニル基またはアルキニル基を示し、Ｒ１およびＲ２は同一であっても異なっていてもよい。Ｍ＋はナトリウムイオン、カリウムイオンまたはリチウムイオンを示す。）を混合する第１混合行程と、第１混合行程の後、さらに少なくともワックスを混合する第２混合行程とを有し、ゴム成分の全量を１００質量部としたとき、式（Ｉ）に記載の化合物の配合量が、０．１質量部以上０．７５質量部以下であるゴム組成物の製造方法。【選択図】なし