HYDROGENATED BLOCK COPOLYMER AND MANUFACTURING METHOD THEREFOR

• Main Authors: SASAKI HIROMITSU, UEHARA YOSUKE
• Format: Patent
• Language: English; Japanese
• Published: 10.08.2017
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS

PROBLEM TO BE SOLVED: To provide a hydrogenated block copolymer excellent in vibration damping property, flexibility, rubber elasticity and weather resistance, and a manufacturing method therefor.SOLUTION: There is provided a hydrogenated block copolymer which is a block copolymer containing a polymer block (A) consisting of a structural unit derived from an aromatic vinyl compound and a polymer block (B) containing a structural unit (b1) derived from farnesene of 1 to 100 mass% and a structural unit (b2) derived from conjugated diene other than farnesene of 99 to 0 mass%, where 50 mol% or more of carbon-carbon double bond in the polymer block (B) is hydrogenated and loss tangent (tanδ) by dynamic viscoelasticity measurement at -60 to 0°C is 0.1 or more.SELECTED DRAWING: None 【課題】制振性、柔軟性、ゴム弾性及び耐候性に優れる水添ブロック共重合体、及びその製造方法を提供すること。【解決手段】芳香族ビニル化合物由来の構造単位からなる重合体ブロック（Ａ）と、ファルネセン由来の構造単位（ｂ１）を１〜１００質量％含有し、ファルネセン以外の共役ジエン由来の構造単位（ｂ２）を９９〜０質量％含有する重合体ブロック（Ｂ）とを含むブロック共重合体であって、重合体ブロック（Ｂ）中の炭素−炭素二重結合が５０ｍｏｌ％以上水素添加され、−６０〜０℃における動的粘弾性測定による損失正接（ｔａｎδ）が０．１以上である水添ブロック共重合体。【選択図】なし