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Method for preparing rubber packing containing white carbon black by gas-phase method

A fumed silica and rubber filler technology, applied in the field of rubber filler preparation, can solve the problems of difficulty in eating powder, low bulk density, and wide application of dust flying.

Inactive Publication Date: 2008-11-19
GUANGZHOU GBS HIGH TECH & IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, fumed silica has always been difficult to be widely used in the field of green tires and high-performance rubber. The above-mentioned disadvantages are its low bulk density, difficulty in eating powder during mixing, and serious dust flying. Among them, it is difficult to be widely used. a reason

Method used

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  • Method for preparing rubber packing containing white carbon black by gas-phase method
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  • Method for preparing rubber packing containing white carbon black by gas-phase method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The formula is according to Table 1, and the schematic diagram of the technological process is as figure 1 , after the fumed silica is activated in the silo 02, it is accurately metered and fed through the rotary feeding valve of the feeder 03 at 50 g / min, and is continuously transported to the treatment furnace 06 with nitrogen as the carrier, while the silane coupling agent bis-(triethyl Oxysilylpropyl) tetrasulfide TESPT is vaporized in the treatment agent tank 04 by the flowmeter at 12.5g / min, and the evaporator 05 is vaporized with nitrogen as the carrier. It is sprayed into the reaction furnace 06 from the bottom of the reaction furnace 06, and fully contacts and reacts with the fumed silica. The silicon hydroxyl groups on the surface of the silica react, so that the silane coupling agent is chemically bonded to the surface of the silica. The reacted white carbon black enters the finished product tank 07 from the top of the reaction furnace 06 for collection, and...

Embodiment 2

[0031] Formula is according to Table 2, and by the same method as Example 1, the silane coupling agent TESPT is changed to TESPB to obtain sample 2 # and A2.

[0032] Table 2

[0033]

Embodiment 3

[0035] According to Table 3, the fumed silica is fed through the rotary feeding valve at 50 g / min, and the silane coupling agent hexamethyldisilazane (HDMS) is fed at 7.5 g / min through the flow meter, at 180 ° C After vaporization, nitrogen is used as the carrier to enter the reactor from the bottom of the fluidized bed reactor. Control the temperature of the reactor at 180-240°C, mix the treated silica with dimethyl silicone oil, DOP, stearic acid, and zinc oxide to obtain sample 3 # , then put 3 # The sample and other additives were mixed into the rubber, and sample A3 was obtained after vulcanization, and various properties were tested according to Example 1.

[0036] table 3

[0037]

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Abstract

The invention discloses a method for preparing rubber filler which contains gas-phase white carbon black. The method comprises the following two steps that: silane coupling agent reacts with the gas-phase white carbon black, and surface treatment is performed on the gas-phase white carbon black; and the gas-phase white carbon black after surface treatment is mixed with rubber plasticizer and rubber processing aid. The stacking density of the gas-phase white carbon black after treatment is greatly improved, and dust explosion during the mixing process is overcome; simultaneously the dispersivity of the gas-phase white carbon black in rubber and the interreaction of the rubber are improved as well, and high-performance rubber materials can be obtained.

Description

technical field [0001] The invention relates to a method for preparing a rubber filler containing gas phase white carbon black. Background technique [0002] Fumed white carbon black (also known as fumed silica) is a nano-scale silica product prepared by high-temperature hydrolysis and condensation of halosilanes in a hydrogen-oxygen flame. Because it has high reinforcement, thickening, Thixotropic properties are widely used in silicone, aerospace, coatings, inks, medicine, food and other fields. In recent years, although its application in rubber other than silicone rubber has gradually attracted people's attention, due to the relatively low bulk density of fumed silica (30-60g / L), it is relatively powdery when mixed with rubber. At the same time, the dust is relatively serious, so although it has a relatively good reinforcing effect, it has been difficult to be widely used. [0003] As we all know, the rubber formula basically includes base rubber, filling and reinforcin...

Claims

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Application Information

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IPC IPC(8): C08K9/00C08K9/06C08L21/00
Inventor 王跃林段先健刘莉
Owner GUANGZHOU GBS HIGH TECH & IND
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