Rubber composition for heavy-duty tire, and tire
A rubber composition and tire technology, which is applied in the fields of tire belts and heavy-duty tires, tire treads, and bead cores, and can solve the problems of poor processability, wet grip performance, and insufficient improvement in handling stability and wear resistance. and other problems, to achieve the effect of excellent wet grip performance and good handling stability
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[0189] Hereinafter, the present invention will be described in further detail through examples, but the present invention is not limited to these examples.
[0190] Each component used in this Example and a comparative example is as follows.
[0191]
[0192] Natural rubber: STR20 (natural rubber from Tai)
[0193] Butadiene rubber: BR01 (manufactured by JSR Corporation, Mw: 550,000, cis body content: 95% by mass).
[0194]
[0195] The modified liquid polybutadiene obtained in Production Example 1 and the liquid diene rubber obtained in Production Example 2 will be described later.
[0196]
[0197] Silica: ULTRASIL7000GR (manufactured by Ebonick Degusa Japan, wet silica, average particle size 14nm)
[0198] Carbon black: Daia Black I (manufactured by Mitsubishi Chemical Corporation, average particle diameter: 20 nm).
[0199]
[0200] Sulfur (micronized sulfur 200 mesh, manufactured by Tsurumi Chemical Industry Co., Ltd.).
[0201]
[0202] Vulcanization accele...
manufacture example 1
[0212] Production Example 1: Production of Modified Liquid Diene Rubber (B-1)
[0213] The fully dried 5L autoclave was replaced with nitrogen, and 1150g of hexane and 154g of n-butyllithium (17% by mass hexane solution) were put into it. After the temperature was raised to 50°C, under stirring conditions, the polymerization temperature was controlled so that the polymerization temperature reached 50°C. Simultaneously, 10 g of N,N,N',N'-tetramethylethylenediamine and 1250 g of butadiene were successively added, and polymerization was performed for 1 hour. Thereafter, methanol was added to terminate the polymerization reaction to obtain a polymer solution. Water was added to the obtained polymer solution and stirred, and the polymer solution was washed with water. After the stirring was completed and the separation of the polymer solution phase and the water phase was confirmed, the water was separated. The polymer solution after washing was vacuum-dried at 70° C. for 24 hour...
manufacture example 2
[0215] Production Example 2: Production of liquid diene rubber (B'-2)
[0216] The fully dried 5L autoclave was replaced with nitrogen, and 1150g of hexane and 154g of n-butyllithium (17% by mass hexane solution) were put into it. After the temperature was raised to 50°C, under stirring conditions, the polymerization temperature was controlled so that the polymerization temperature reached 50°C. Simultaneously, 10 g of N,N,N',N'-tetramethylethylenediamine and 1250 g of butadiene were successively added, and polymerization was performed for 1 hour. Thereafter, methanol was added to terminate the polymerization reaction to obtain a polymer solution. Water was added to the obtained polymer solution and stirred, and the polymer solution was washed with water. After the stirring was completed and the separation of the polymer solution phase and the water phase was confirmed, the water was separated. The polymer solution after washing was vacuum-dried at 70° C. for 24 hours to obt...
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Abstract
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