RUBBER COMPOSITION FOR VEHICLE COOLANT TRANSPORT HOSE, AND VEHICLE COOLANT TRANSPORT HOSE OBTAINED USING SAME

    公开(公告)号:EP4428191A1

    公开(公告)日:2024-09-11

    申请号:EP22904123.1

    申请日:2022-12-01

    摘要: Provided are a rubber composition for a vehicle coolant transport hose and a vehicle coolant transport hose obtained using the same that make it possible to solve various problems associated with increased coolant conductivity and clogging of filters of a vehicle coolant system, these problems having been observed in the past when a sulfur-vulcanized ethylene-propylene copolymer rubber composition was employed as a hose material. A sulfur-vulcanized rubber composition that contains an ethylene-propylene copolymer rubber (A) as the main component and a vulcanization accelerator (B) and that serves as the material of the innermost layer of a vehicle coolant transport hose, wherein the vulcanization accelerator (B) includes at least one vulcanization accelerator selected from the group consisting of (B-1) to (B-3) below in a specific proportion. (B-1) A dithiocarbamate vulcanization accelerator having a molecular weight of 380 or greater. (B-2) A thiuram vulcanization accelerator having a molecular weight of 380 or greater. (B-3) A sulfenamide vulcanization accelerator.

    RUBBER COMPOSITION AND RUN-FLAT TIRE
    3.
    发明公开

    公开(公告)号:EP4039503A1

    公开(公告)日:2022-08-10

    申请号:EP20873132.3

    申请日:2020-10-01

    摘要: The present invention provides a run-flat tire excellent in high-temperature softening inhibition, and a rubber composition from which the tire can be produced. The rubber composition contains a rubber component, a filler, a vulcanizing agent, and a vulcanization accelerator that contains a sulfenamide-based vulcanization accelerator and 1.0 to 2.0 parts by mass of tetrabenzylthiuramdisulfide based on 100 parts by mass of the rubber component, in which a mass ratio (a/b) of a content (a) of the tetrabenzylthiuramdisulfide to a content (b) of the sulfenamide-based vulcanization accelerator is 0.60 to 1.25.

    TIRE
    7.
    发明公开
    TIRE 审中-公开

    公开(公告)号:EP3656815A1

    公开(公告)日:2020-05-27

    申请号:EP18835002.9

    申请日:2018-07-19

    摘要: Provided is a tire that can satisfy both low heat build-up property and fracture resistance at a higher level than conventional tires. The tire has a center gauge of not less than 50 mm and contains a rubber composition obtained by blending less than 20 parts by mass of a silica with respect to 100 parts by mass of a rubber component, along with a thiuram-based accelerator, a sulfenamide-based accelerator, and a resin.