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Secondary coupled modified mineral powder filling material and preparation process thereof

A mineral powder and modification technology, which is applied in fibrous fillers, dyed organic silicon compound treatment, dyed low molecular organic compound treatment, etc., can solve problems such as difficulties and achieve improved reinforcement performance, good compatibility, and adhesion The effect of high branch efficiency

Inactive Publication Date: 2014-07-16
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the mineral powders obtained by the above modification method are micron-sized particles. It is difficult to disperse the mineral powders in the rubber matrix with nano-sized particles.

Method used

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  • Secondary coupled modified mineral powder filling material and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of modified montmorillonite powder mineral filler:

[0022] Add 20kg of a mixture of acetone and ethyl acetate at a volume ratio of 1:1 into a 50L autoclave, then add 1.0kg of silane coupling agent, and stir to form a uniform solution. When the stirring speed is controlled below 25rpm, add 10kg of montmorillonite with a mineral content of 92% and a specific surface area of ​​105m 2 / g of powder, close the reactor, heat up to 60°C with electricity, control the stirring speed at 1500rpm, stir for 1h, and ultrasonically disperse for 20min during this period. After standing to cool, add 1.0kg of 1,4-pentadiene, continue to seal, keep warm at 90°C, and stir at 1500rpm for 2h, during which ultrasonic dispersion is 20min. After cooling and solid-liquid separation, the solid phase part is dried at 106° C., pulverized by a jet mill, sealed and stored to obtain secondary modified montmorillonite mineral powder.

[0023] Use this powder to fill EPDM rubber, the formu...

Embodiment 2

[0025] Preparation of modified sepiolite mineral powder filler:

[0026] Add 20kg of n-butanol into a 50L autoclave, then add 0.1kg of silane coupling agent and 0.1kg of titanate coupling agent, and stir to form a uniform solution. When the stirring speed is controlled below 25rpm, add 10kg of sepiolite with a mineral content of 95% and a specific surface area of ​​126m 2 / g powder, close the reaction vessel, heat up to 90°C with electricity, control the stirring speed at 1500rpm, stir for 1h, and ultrasonically disperse for 20min during this period. After standing to cool, add 0.2kg of acrylonitrile, continue to seal, keep warm at 120°C, and stir at 1500rpm for 2h, during which ultrasonic dispersion is 20min. After cooling and solid-liquid separation, the solid phase part is dried at 120° C., pulverized by a jet mill, sealed and stored to obtain secondary coupling synergistically modified sepiolite mineral powder.

[0027] When using this powder to fill nitrile rubber, the ...

Embodiment 3

[0029] Preparation of modified attapulgite mineral powder filler:

[0030] Add 20kg of a mixture of isopropanol and toluene at a volume ratio of 1:1 into a 50L autoclave, then add 1.0kg of silane coupling agent and 1.0kg of titanate coupling agent, and stir to form a uniform solution. When the stirring speed is controlled below 25rpm, add 20kg of attapulgite with a mineral content of 98% and a specific surface area of ​​168m 2 / g powder, close the reaction vessel, heat up to 80°C with electricity, control the stirring speed at 1500rpm, stir for 1h, and ultrasonically disperse for 20min during this period. After standing to cool, add 1.0kg of polypropylene and 1.0kg of styrene, continue to seal, keep warm at 90°C, and stir at 1500rpm for 2h, during which ultrasonic dispersion is 20min. After cooling and solid-liquid separation, the solid phase part is dried at 110° C., pulverized by a jet mill, sealed and stored to obtain attapulgite mineral powder synergistically modified by ...

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Abstract

The invention provides a secondary coupled modified mineral powder filling material which comprises, by mass, 85 to 98% of silicate clay mineral powder, 1.0 to 10% of a coupling agent, and 1.0 to 10% of a functional organic compound, wherein the amount of the above-mentioned components sums to 100%. The modified mineral powder filling material prepared in the invention has good compatibility with a rubber substrate, and functional organic compound modified mineral powder with high affinity is beneficial for improvement of reinforcing performance of the filling material; since a water phase does not participate in the process of preparation, reaction obstacles caused by hydrophilicity of the mineral powder are avoided, the mineral powder can directly react with the coupling agent, higher grafting efficiency is realized, solid-liquid separation difficulty is reduced, drying efficiency is enhanced, and the phenomenon of caking in the process of drying is avoided.

Description

technical field [0001] The invention relates to the field of non-metallic mineral material processing and filling composite rubber utilization, in particular to a secondary coupling modified mineral filler and a preparation process thereof. Background technique [0002] With the rapid development of my country's transportation industry, the amount of various rubber products has increased significantly, which has led to a surge in the amount of rubber fillers. The filler used in traditional rubber products is mainly carbon black, and the production of carbon black is based on fossil energy, which requires the consumption of a large amount of by-products of petroleum, natural gas or coal chemical industry, and releases a large amount of "greenhouse gas" CO 2 , SO 2 , NO x Pollutants such as gas and dust. It is a typical "three high industries" restricted by the state. Coupled with the continuous rise of international crude oil prices, the energy prices continue to rise, wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/42C09C3/12C09C3/08C09C3/10C08L23/16C08K13/06C08K9/06C08K9/04C08K3/34C08L9/02C08L9/06C08L15/00C08L9/00C08L75/04
Inventor 汤庆国梁金生丁燕王菲
Owner HEBEI UNIV OF TECH
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