Rubber composition and pneumatic tire
A rubber composition and rubber technology, applied in special tires, tire parts, transportation and packaging, etc., can solve problems such as large specific surface area, easy aggregation, and reduced wear resistance
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Synthetic example 1
[0237] Synthesis Example 1 (Synthesis of Granular Zinc Carrier)
[0238] 91.5 g of zinc oxide was added to 847 mL of 5.5 mass% calcined clay aqueous suspension, and they were sufficiently stirred. To the mixture were added 330 g of a 10% by mass aqueous sodium carbonate solution and 340 g of a 10% by mass aqueous zinc chloride solution, followed by stirring. Subsequently, 30% by mass carbon dioxide gas was injected into the resultant mixture until the pH reached 7 or less to precipitate alkaline zinc carbonate on the surface of the calcined clay to synthesize a particulate zinc carrier. The synthesized product is then subjected to dehydration, drying and pulverization steps to obtain powder. In this way, a particulate zinc carrier was prepared.
[0239] The BET specific surface area of the granular zinc carrier is 50m 2 / g. In the particulate zinc carrier, calculated as metallic zinc, the calcined clay is loaded with 45% by mass of alkaline zinc carbonate. The loaded basic zi...
manufacture example 1
[0248]
[0249] To a 100 mL volumetric flask under a nitrogen atmosphere, 6.54 g of N,N-dimethylaminopropyl acrylamide was added, and then anhydrous hexane was added until the total amount was 100 mL, thereby preparing Modifier 1.
[0250]
[0251] Add 18L of n-hexane, 600g of styrene, 1,400g of butadiene and 10mmol TMEDA into a 30L pressure vessel fully replaced with nitrogen, and then raise the temperature to 40°C. Next, 11 mL of the n-butyllithium solution was added to the mixture, and then the temperature was increased to 50°C, followed by stirring for 3 hours. 14 mL of Modifier 1 was added to the resulting mixture, followed by stirring for 30 minutes. Subsequently, 1 mL of methanol and 0.1 g of 2,6-di-tert-butyl-p-cresol were added to the reaction solution, and then aggregates were collected from the polymer solution by steam stripping. The aggregate was dried under reduced pressure for 24 hours to obtain a copolymer. The copolymer has a styrene content of 30% by mass and ...
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