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.
摘要:
The present invention describes a rubber composition containing at least a rubber, a filler, a sulfur-containing silane coupling agent, and a vulcanization accelerator; the rubber containing from 30 to 60 parts by mass of an NR and from 40 to 70 parts by mass of a BR; the filler containing a carbon black and a silica; the carbon black having a CTAB specific surface area of from 60 to 160 m2/g; the silica having a CTAB specific surface area of from 60 to 100 m2/g; a blended amount of the filler is from 55 to 75 parts by mass per 100 parts by mass of the rubber; a blended amount of the silica (silica proportion) with respect to the blended amount of the filler being 10 mass% or more; and a blended amount of the vulcanization accelerator with respect to the silica being from 2.5 to 8 mass%.
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.
摘要:
The present invention relates to a modifier represented by Formula 1, a method for preparing the same, a modified conjugated diene-based polymer including a functional group derived from the modifier and having a high modification ratio, and a method for preparing the polymer.
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.
摘要:
The present invention is in the field of flame retardants and relates to use of sulfenamides, sulfinamides, and sulfonamides as flame retardants, in particular in polymeric substrates.