Rubber composition and tire using same
A rubber composition and tire technology, applied to special tires, tire parts, reinforcement layers of pneumatic tires, etc., to achieve the effect of improving the durability of run-flat
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[0148] (Preparation of rubber composition and manufacture of tire)
[0149] The rubber composition of the present invention can be obtained by kneading the components according to the above-mentioned compounding formula by means of mixing machines such as Banbury mixers, rollers and internal mixers, and after forming, vulcanize and use as figure 1 At least one of the side reinforcing rubber layer 8 and the bead filler 7 is shown.
[0150] The tire of the present invention is produced by using the rubber composition of the present invention by a conventional run-flat tire production method having at least one of the side reinforcing rubber layer 8 and the bead filler 7 . That is, the rubber composition according to the present invention prepared by adding various chemical substances in the above-mentioned manner is processed into parts at a non-vulcanization stage, and the parts are pasted and molded on tire building equipment by a conventional method to form a green tire. Th...
Embodiment
[0152] Next, the present invention will be explained in more detail with reference to examples, but the present invention should by no means be limited by the examples shown below.
[0153] Each characteristic was measured according to the following methods.
[0154] "Physical Properties of Modified Conjugated Diene Polymers"
[0155]
[0156] The vinyl bond content (% by mass) of the butadiene moiety was measured by an infrared method (Morello method).
[0157] Measured by GPC (HLC-8020, manufactured by Tosoh Corp.) using a refractometer as a detector, and expressed in terms of polystyrene with monodisperse polystyrene as a standard. The column was GMHXL (manufactured by Tosoh Corp.), and the eluent was tetrahydrofuran.
[0158]
[0159] First, after dissolving the polymer in toluene, it was precipitated in a large amount of methanol to separate amino-containing compounds not bonded to the polymer from the rubber, followed by drying. The polymer subjected to the abov...
manufacture example 1
[0178] Production Example 1: Production of Modified Conjugated Diene-Based Polymer A
[0179] (1) Manufacture of unmodified polybutadiene
[0180] In a 5 L autoclave replaced with nitrogen, 1.4 kg of cyclohexane, 250 g of 1,3-butadiene and 2,2-di-tetrahydrofurylpropane (0.0285 mmol ), after adding 2.85 mmol of n-butyllithium (BuLi) thereto, polymerization was carried out for 4.5 hours in a 50° C. warm water bath equipped with a stirring device. The reaction conversion of 1,3-butadiene was almost 100%. A part of the above polymer solution was placed in a methanol solution containing 1.3 g of 2,6-di-tert-butyl-p-cresol to terminate the polymerization, and then the solvent was removed by stripping. The resulting solid matter was dried on a drum at 110° C. to obtain polybutadiene before modification. The thus obtained polybutadiene before modification was used to measure the microstructure (vinyl bond amount), weight average molecular weight (Mw) and molecular weight distribu...
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