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Silane-Modified Silcic Acid, Method For The Production And Use Thereof

A silica and silane modification technology, used in silica, silica, chemical instruments and methods, etc., can solve the problems of poor dispersion, poor wear resistance, high Mooney viscosity, etc.

Inactive Publication Date: 2016-08-03
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The known ex-situ modified fillers with organosilanes have the disadvantage that the dispersion of these ex-situ-modified fillers is very poor, which leads to high Mooney viscosity and poor wear resistance

Method used

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  • Silane-Modified Silcic Acid, Method For The Production And Use Thereof
  • Silane-Modified Silcic Acid, Method For The Production And Use Thereof
  • Silane-Modified Silcic Acid, Method For The Production And Use Thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] Embodiment 1: the preparation of silica A

[0147] In the stainless steel reactor that has propeller stirring system and jacket heating, at first load the water glass (density 1.348kg / L, 27.0%SiO2 of 1510L water and 46kg 2 , 8.05% Na 2 O). Then, after vigorous stirring at 92° C. for 90 minutes, 6.655 kg / min of the above-mentioned water glass and about 0.832 kg / min of sulfuric acid (density 1.83 kg / L, 96% H 2 SO 4 ). The metered addition of the sulfuric acid was adjusted such that a base number of 7 prevailed in the reaction medium. Subsequently, the addition of water glass was stopped and further sulfuric acid was fed in until a pH of 8.5 was reached (measured at room temperature). After standing for about 30 minutes, further sulfuric acid was metered in until a pH of 4.5 was reached. The resulting suspension was filtered with a membrane filter press, washed with water and dried.

Embodiment 2

[0148] Embodiment 2: the preparation of silica B

[0149] In the stainless steel reactor that has propeller stirring system and jacket heating, at first load the water glass of 1550L water and 141.4kg (density 1.348kg / L, 27.0%SiO 2 , 8.05% Na 2 O). Then, after vigorous stirring at 92°C for 100 minutes, 5.505 kg / min of the above-mentioned water glass and about 0.65 kg / min of sulfuric acid (density 1.83 kg / L, 96% H 2 SO 4 ). The metered addition of the sulfuric acid was adjusted such that a base number of 20 prevailed in the reaction medium. Subsequently, the addition of water glass was stopped and further sulfuric acid was fed in until a pH of 9.0 was reached (measured at room temperature). The addition of sulfuric acid was stopped and the resulting suspension was stirred at 90° C. for a further 60 minutes. Subsequently, the addition of sulfuric acid was started again and a pH of 3.5 (measured at room temperature) was achieved. The resulting suspension was filtered with ...

Embodiment 3

[0157] Example 3: Preparation of silane-modified silica of the present invention (silica A+Si264)

[0158] The Henschel mixer is first charged with the appropriate amount of filler and the mixer is started. Set the Blend Tool Speed ​​to a suitable value. The silane is sprayed into the mixer by means of an ultrasonic nozzle. Then, the mixer outlet valve was opened and the product was discharged from the mixer.

[0159] The mixing conditions are listed in Table 3. The silica used was silica A (Example 1) and the silane was Si264.

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Abstract

The invention relates to silane-modified silicic acid with a BET surface area of 40-155 m<2> / g, a sulphur content of between 0.05 and 25 wt.% and a particle size of between d5 >= 4 mum, and d50 >= 16 mum. The silane-modified silcic acids are used in rubber mixtures.

Description

technical field [0001] The present invention relates to silane-modified silica, to a process for its preparation and to its use. Background technique [0002] It is known that oxidized or silicatic compounds can be treated with organosilicon compounds, thereby strengthening the bond between the inorganic fillers used in filler-reinforced elastomers and the organic polymer by this treatment, and thereby Improve the properties of fillers in the polymer. [0003] DE2141159, DE2212239 and US3,978,103 disclose sulfur-containing organosilicon compounds such as bis(3-triethoxysilylpropyl)tetrasulfane or 3-mercaptopropyl-triethoxysilane as Silane adhesion promoters or reinforcing additives in filled rubber compounds for applications including treads and other components of automotive tires. [0004] Coupling agents for tire components known to be able to avoid significant problems in the processing of mercaptosilanes such as pre-scorch, scorch and plastic properties are generally ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60C1/00C01B33/18C01B33/193C08K3/36C09C1/30C08K9/06
CPCB60C1/0016C01B33/18C01B33/193C01P2004/51C01P2004/61C01P2006/12C07F7/1804C09C1/3081C08K9/06C08L21/00C09D7/62C08K3/36
Inventor A·布卢默T·彼得莱J·蒙凯维奇
Owner EVONIK OPERATIONS GMBH
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