TH54570B - Good dispersible precipitated silica - Google Patents

Abstract

DC60 (27/10/46) This invention involves a highly dispersed silica with a large surface area, the aforementioned silicas production process, and the use of silica as an excipient for rubber tires. For vehicle General purpose, motorcycle And high-speed vehicle The invention involved a highly dispersed silica with a large surface area, the aforementioned silica manufacturing process, and the use of silica as an excipient for vehicle tires. General purpose, motorcycle And high-speed vehicle

Claims (8)

1. Precipitated silica characterized by BET surface area 178 - 302 m2/g, CTAB surface area greater than or equal to 170 m2/g, DBP number 200 - 300 g/(100 g), Sears V2 number 10 - 35 ml/. (5 g) 2. Precipitated silica as held in Claim 1, which is characterized by the fact that the maximum CTAB surface area is 300 m2/g. hold the right in one claim Which of the 1 or 2 claims is characterized by the fact that The precipitated silica has a WK coefficient of less than or equal to 3.4 (the ratio of Peak height of Particles that are not decomposed by ultra sound in the size range 1.0 - 100 m m per peak height of the decayed particle in the size range < 1.0 m m ) 1.2 or 3, provided that r + n + m + p = 4. Alkyl: Saturated monovalent hydrocarbons, unbranched chains or Branched chains with 1 to 20 carbon atoms are proposed to contain 2 to 8 carbon atoms. Alkenyl : Unsaturated monovalent hydrocarbon chains, or unbranched chains. Branched chain with 2 to 20 carbon atoms proposed to contain 2 to 8 carbon atoms 5. Process for producing precipitated silica with BET surface area 178 - 302 m2/g, CTAB surface area greater than or equal to 170 m2/g numbers. DBP 200 - 300 g/(100 g) Sear V2 numbers 10 - 35 ml/(5 g) in which a) contains an aqueous solution of alkali silicate or alkaline earth silicate. and/or organic bases and/or inorganic bases with a pH of 7 - 8.5 b). This solution while stirring at 55 - 95 °C for 10 - 120 min simultaneously e) acidification with an acidic agent to a pH of approximately 3.5 and f) filtering and drying. As held in Claim 5, which is characterized by the fact that The following procedure is performed between steps b) and e) c) stop dosing for 30 to 90 minutes while treatment. that temperature, and d) waterglass and acidifying agents were quantified into this solution while stirring at this temperature for 20 - 120 minutes simultaneously. 7. The process as claimed in Claim 6, which is characterized by the fact that acidic substances and/or waterglass in steps b) and d) is concentrated. or the same quantitative measurement rate. Acidifying substances and/or waterglass in steps b) and d) have different concentrations or quantification rates. that the fact that with equal concentrations of the acidic substance and/or waterglass in steps b) and d), the quantification rate of the substance These in step d) equal 125 - 140 percent of the quantification rate in step b) 1 0. The process as claimed in one of the claims. which of claims 5 through 9 is characterized by the fact that Air lift dryer, spray dryer, rack dryer, spray dryer Conveyor, Rotary Dryer, Quick Dryer, Rotary Quick Dryer or a nozzle-type drier is taken. Used for drying process 1 1. The process as claimed in one of the claims Which of the 5 to 10 claims is characterized by the fact that after the drying process carry out the granulation process with roller compactor 1 2. The process as claimed in one of the claims which of claims 5 through 11, which is characterized by the fact that During steps b) and d) organic salts are added or inorganic salt 1 3. The process as claimed in one of the claims which of claims 5 through 12, which is characterized by the fact that Granular or non-granular precipitated silica The fine grains are modified. With organnosilanes in mixtures of 0.5 to 50 parts organosilane vs. 100 parts precipitated silica, preferably 1 to 15 parts vs 100 precipitated silica, the interaction between the silica lyca precipitates with organnosilane It is carried out either during the production of the mixture (on site) or outside of production by aerosolization and subsequent curing of the mixture. or by mixing organnosilane with silica suspension with subsequent drying and curing 1 4. Mixtures of elastomers, mixtures of vulcanized rubber. and what you get from Vulcanization with precipitated silica as held The right in one of Claims 1 to 4 is a component 1. 5. Tires containing precipitated silica as the right in the clause holding any one of the rights of claims 1 to 4 as component 1 6. Automotive tires for general purpose vehicles containing silicine. Precipitated as held right in any one of the claims of Claims 1 to 4 are components 1 7. Motorcycle tires with precipitated silica as held in one claim Which of the 1 to 4 claims is a component 1? 8. Automotive rubber for high speed vehicles containing precipitated silica. as the silica falls Sediment as held in the claim Any one of Claims 1 to 4 is a component.