Rubber composition for tire
A technology for rubber compositions and tires, applied in special tires, tire parts, transportation and packaging, etc., can solve the problems of low abrasion resistance and insufficient heat generation of rubber cross-linked products, and achieve the effect of excellent heat generation.
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[0141] Hereinafter, the present invention will be further described based on detailed examples, but the present invention is not limited to these examples. In addition, in the following, unless otherwise stated, "part" is a basis of weight. In addition, various tests and evaluations were performed according to the following methods.
[0142] [Molecular weight of cyclopentene ring-opened polymer]
[0143] Gel permeation chromatography (GPC) (GPC system HLC-8220 (manufactured by Tosoh Co., Ltd.)) using tetrahydrofuran as a solvent, using H-type column HZ-M (manufactured by Tosoh Co., Ltd.), was measured at a column temperature of 40°C. The number average molecular weight (Mn), weight average molecular weight (Mw) and molecular weight distribution (Mw / Mn) of the substance were measured as polystyrene conversion values.
[0144] [Cis / trans ratio of cyclopentene ring-opened polymer]
[0145] pass 13 C-NMR spectrum measurement to determine.
[0146] [Glass transition temperatur...
reference example 1
[0163] Preparation of diisobutylaluminum mono(n-hexyl oxide) / toluene solution (2.5% by weight)
[0164] Under a nitrogen atmosphere, 88 parts of toluene and 7.8 parts of a 25.4% by weight triisobutylaluminum / n-hexane solution (manufactured by Tosoh Finechem) were placed in a glass container with a stirrer. Next, the container was cooled to -45°C, and 1.02 parts of n-hexanol (molar equivalent to triisobutylaluminum) was slowly titrated while vigorously stirring. Then, it was left to stand while stirring until it reached room temperature, and a diisobutylaluminum mono(n-hexyl oxide) / toluene solution (2.5% by weight) was prepared.
Synthetic example 1
[0166] Add 87 parts of 1.0 wt% WCl in a glass container with a stirrer under nitrogen 6 / toluene solution and 43 parts of the 2.5% by weight diisobutylaluminum mono(n-hexyl oxide) / toluene solution prepared in Reference Example 1 were stirred for 15 minutes to obtain a catalyst solution. Then, under a nitrogen environment, in a pressure-resistant glass reaction vessel with a stirrer, 300 parts of cyclopentene and 1.24 parts of 1,4-bis(triethoxysilyl)-2-butene were added to it. 130 parts of the catalyst solution prepared above was added, and polymerization was carried out at 25° C. for 4 hours. After 4 hours of polymerization reaction, after adding excess ethanol in the pressure-resistant glass reaction vessel and terminating the polymerization, the solution in the pressure-resistant glass reaction vessel was injected into the solution containing 2,6-di-tert-butyl-p-cresol (BHT ) in a large excess of ethanol. Next, the precipitated polymer was recovered, washed with ethanol, a...
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