To provide a hydrous silicic acid having not only a rubber reinforcing performance obtained based on the BET specific surface area but also a rubber reinforcing performance, particularly abrasion resistance, of which function is added through improvement in the dispersibility of the hydrous silicic acid in the rubber.SOLUTION: A hydrous silicic acid for rubber reinforcing and filling has a BET specific surface area in the range of 230 to 350 m/g, satisfying the following a), b) and c). a) The pore volume (V) of pores having a pore radius of 1.9 to 100 nm measured by mercury penetration method is in the range of 1.40 to 2.00 cm/g. b) The total pore volume (V) of pores having a pore radius in the range of 1.6 to 100 nm measured by nitrogen absorption-desorption method is in the range of 1.60 to 2.20 cm/g. c) The pore volume ratio V/Vbetween a) and b) is in the range of 0.70 to 0.95.SELECTED DRAWING: Figure 1
【課題】BET比表面積により得られるゴム補強性能に加えて、含水ケイ酸のゴム中への分散性が改良されることで機能が付加されるゴム補強性能、特に耐摩耗性を有する含水ケイ酸を提供する。【解決手段】BET比表面積が230〜350m2/gの範囲であり、a):水銀圧入法で測定した細孔半径1.9〜100nmの細孔容積(VHP-Hg)が1.40〜2.00cm3/gの範囲であり、b):窒素吸脱着法による細孔半径1.6〜100nmの範囲の全細孔容積(VN2)が1.60〜2.20cm3/gの範囲であり、c):a)及びb)の細孔容積比VHP-Hg/VN2が0.70〜0.95の範囲である、ゴム補強充填用含水ケイ酸。【選択図】図1
HYDROUS SILICIC ACID FOR RUBBER REINFORCING AND FILLING
ゴム補強充填用含水ケイ酸
2020-02-20
Patent
Electronic Resource
Japanese
HYDROUS SILICIC ACID FOR RUBBER REINFORCEMENT AND FILLING
European Patent Office | 2020
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