POLYMER COMPOSITION, CROSSLINKED BODY, AND TIRE

• Main Authors: KIKUCHI TOSHIMITSU, FUKUMOTO TAKATO, SAKAGAMI YUTO, SENGA HIROFUMI, SANO TAKUYA, HAYAKAWA TOSHIYUKI
• Format: Patent
• Language: English; Japanese
• Published: 17.05.2022
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

To provide a polymer composition capable of producing a vulcanized rubber having good on-ice grip performance and excellent abrasion resistance.SOLUTION: There is provided a polymer composition which comprises: (A) a conjugated diene-based polymer having a carbon-carbon unsaturated bond in which when the component ratios (molar ratios) in the polymer of a structural unit represented by the formula (1), a structural unit represented by the formula (2), a structural unit represented by the formula (3) and a structural unit represented by the formula (4) are defined as p, q, r and S, respectively, the value θ represented by the numerical expression (i) is 0.75 or more; and (B) at least one component selected from the group consisting of a water soluble particle and a water-soluble fiber. Numerical expression (i): θ=(p+(0.5×r))/(p+q+(0.5×r)+s).SELECTED DRAWING: None 【課題】氷上グリップ性能が良好であって、かつ耐摩耗性に優れた加硫ゴムを製造することができる重合体組成物を提供すること。【解決手段】（Ａ）式（１）で表される構造単位、式（２）で表される構造単位、式（３）で表される構造単位及び式（４）で表される構造単位の重合体中の構成比（モル比）をそれぞれｐ、ｑ、ｒ、ｓとしたとき、数式（ｉ）で表される値θが０．７５以上であり、炭素－炭素不飽和結合を有する共役ジエン系重合体と、（Ｂ）水溶性粒子及び水溶性繊維よりなる群から選択される少なくとも１種の成分と、を含有する重合体組成物とする。数式（ｉ）：θ＝（ｐ＋（０．５×ｒ））／（ｐ＋ｑ＋（０．５×ｒ）＋ｓ）TIFF2022073281000012.tif31159【選択図】なし