고무 조성물

• Main Authors: UENO YOSHIKAZU, KODA DAISUKE
• Format: Patent
• Language: Korean
• Published: 14.07.2021
• 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

인장 강도가 향상된 가교물이 되는 고무 조성물, 이것을 일부에 사용한 공기입 타이어를 제공한다. 고형 고무 (A), 수첨 방향족 비닐-공액 디엔 랜덤 공중합체 (B) 및 필러 (C) 를 함유하는 고무 조성물이고, 랜덤 공중합체 (B) 가 하기 (i) ∼ (iv) 를 만족하는 고무 조성물. (i) 방향족 비닐 단위의 함유량이 10 ∼ 70 질량％ ; (ii) 수첨 전의 랜덤 공중합체 (B) 의 공액 디엔 단위의 비닐 함유량이 10 ∼ 70 몰％ ; (iii) 공액 디엔 단위의 수소 첨가율이 10 몰％ 이상 ; (iv) 중량 평균 분자량이 3,000 ∼ 100,000 Provided are a rubber composition which can give a crosslinked product with enhanced tensile strength, and a pneumatic tire including the rubber composition as a portion thereof. The rubber composition includes a solid rubber (A), a hydrogenated aromatic vinyl-conjugated diene random copolymer (B), and a filler (C). The random copolymer (B) satisfies the following (i) to (iv). (i) The content of aromatic vinyl units is 10 to 70 mass%. (ii) The vinyl content in conjugated diene units of the random copolymer (B) before hydrogenation is 10 to 70 mol%. (iii) The hydrogenation ratio of the conjugated diene units is not less than 10 mol%. (iv) The weight average molecular weight is 3,000 to 100,000.