Rubber composition, method for producing rubber composition, and tire
A technology of rubber composition and manufacturing method, applied in special tires, tire parts, tire treads/tread patterns, etc., to achieve the effects of improving low loss and dispersibility
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[0286] Regarding the proportion of the rubber component used in the preparation of the preliminary master batch, the proportion is preferably 10% by mass or more, more preferably 20% by mass or more, and most preferably 100% by mass of the rubber component. Setting the ratio of the rubber component within the aforementioned range preferably improves the interaction between the rubber component and the reinforcing filler, thereby ensuring further better low loss and further higher abrasion resistance. Production of rubber compositions.
[0287] The aforementioned components are the same as those described in the description of the above-mentioned rubber composition (rubber component, tetrazine-based component, reinforcing filler, and other components).
[0288]
[0289] The method for producing the rubber composition of the present invention includes a kneading step of kneading the compounding components consisting of the rubber component (A) containing diene rubber, the tetr...
Embodiment 1
[0319] (Samples 1-1~1-10, 2-1~2-10, 3-1~3-10, 4-1~4-10, 5-1~5-10, 6-1~6-10, 7-1~7-10, 8-1~8-10, 9-1~9-10, 10-1~10-8 and 11-1~11-15)
[0320] Samples of rubber compositions according to the compounding formulations shown in Tables 1 to 6 were prepared by kneading the relevant compounding ingredients by using a sand blast mill. Regarding the kneading of the compounding ingredients, as shown in Tables 1 to 6, preparations in which a preliminary masterbatch obtained by kneading at least a part of the rubber component and the tetrazine-based compound in advance and the remaining compounding ingredients were kneaded were prepared, respectively. One set of samples, and another set in which all compounding ingredients were compounded together.
[0321] For each sample thus prepared, the tan δ value and abrasion resistance were evaluated by the following methods.
[0322] (1) Wear resistance
[0323] For each sample, the amount of abrasion (mm 3): vulcanized rubber obtained by vulc...
Embodiment 2
[0376] (Samples 1 to 11)
[0377] Samples of rubber compositions were prepared according to the compounding recipe and kneading method shown in Table 1. The maximum temperature of the mixture in the first mixing stage for each sample is shown in Table 1. In the preparation of the samples of these rubber compositions, the second mixing stage was carried out after the first mixing stage. A Banbury internal mixer was used for mixing.
[0378]
[0379] (1) Dynamic storage elastic modulus (E')
[0380] For the rubber composition of each sample, the dynamic storage elastic modulus (E') was measured by subjecting the rubber composition to vulcanization at 160°C for 15 minutes to obtain a vulcanized rubber; and at a temperature of 30°C with an initial strain of The dynamic storage elastic modulus (E') of the vulcanized rubber thus obtained was measured by using a spectrophotometer manufactured by Ueshima Seisakusho Co., Ltd. under conditions of 2%, a dynamic strain of 1%, and a fre...
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