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Method for preparing rubber composite by high-pressure mixing equipment and application thereof

A technology for high-pressure mixing and composite materials, which is used in the field of high-pressure mixing equipment to prepare rubber composite materials, and can solve problems such as polluting the environment, agglomeration, and endangering the health of operators.

Inactive Publication Date: 2010-06-16
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mixing process not only consumes energy but also pollutes the environment. During the mixing process, it is difficult for rubber to "eat powder", and the powder is flying, which pollutes the environment and seriously endangers the health of operators.
In addition, due to the limitations of the dry mixing process, the dispersion of anti-aging agents and inorganic fillers in the rubber matrix cannot be very uniform, and severe agglomeration will occur locally, which cannot achieve the ideal anti-aging and reinforcing effects. Will reduce the valuable properties of NR itself (such as high elasticity, high wear resistance, etc.)
[0003] In summary, this area lacks a method for preparing rubber composite materials with good dispersion effect and higher performance of rubber products.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 100 grams of carbon black (N220, Suzhou Baohua Carbon Black Factory) was added to 400 grams of water, and a suspension of carbon black was obtained by colloid milling. The prepared suspension is mixed with natural rubber latex under a high pressure of 95MPa by jet equipment, and a mixed layer is formed due to the large speed difference between the carbon black suspension and natural rubber latex, and the mixed layer expands along the jet flow direction. The carbon black suspension is continuously dispersed into the natural rubber latex by entrainment and mixing. Then dehydration and drying are carried out to obtain a natural rubber carbon black masterbatch. According to the GB / T6030-2006 test, the dispersion level of carbon black in the masterbatch reaches 8.

Embodiment 2

[0074] 60 grams of white carbon black (Degussa Company) was added to 250 grams of water, and a suspension 1 of white carbon black was obtained by colloidal grinding. 3.6 grams of sulfur, 12 grams of zinc oxide, and 4.2 grams of CZ (N-cyclohexyl-2-benzothiazole sulfenamide) were added to 50 grams of water, and a suspension 2 was prepared by colloid milling. The prepared suspension 1 and suspension 2 are mixed with natural rubber latex under a high pressure of 200 MPa using a jet equipment. Then carry out dehydration and drying to obtain a masterbatch. The masterbatch was heated and vulcanized at 140°C to prepare the vulcanized rubber, and the performance of the vulcanized rubber was tested. The measured tensile strength of the vulcanized rubber is 34MPa, the elongation at break is 810%, the permanent deformation is 15.3%, the tear strength (crescent) is 125N / mm, the Shore A hardness is 46, and the rebound rate is 69%.

Embodiment 3

[0076] 20 grams of carbon black (N220, Suzhou Baohua Carbon Black Factory) and 30 grams of carbon black (N234, Suzhou Baohua Carbon Black Factory) were added to 125 grams of water, and a suspension 1 of carbon black was obtained by colloid milling. 1.6 grams of sulfur, 5 grams of zinc oxide, and 1.2 grams of NOBS (N-oxydiethylene-2-benzothiazole sulfenamide) were added to 20 grams of water, and a suspension 2 was prepared by colloid milling. The prepared suspension 1 and suspension 2 were mixed with 50 grams of natural rubber latex and 127 grams of butadiene latex (the solid content of the latex was 55%) under high pressure using jet equipment, and the Re of the fluid was 5000. Then carry out dehydration and drying to obtain a masterbatch. The masterbatch was heated and vulcanized at 140°C to prepare the vulcanized rubber, and the performance of the vulcanized rubber was tested. The measured tensile strength of the vulcanizate is 26MPa, the elongation at break is 750%, the pe...

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Abstract

The invention provides a method for preparing rubber composite by high-pressure mixing equipment, comprising the following steps: (a) dispersing fillers and auxiliaries acceptable in polymer science or combination thereof into the dispersant to obtain one or more suspension, (b) dispersing the suspension into the latex under the action of the high-pressure mixing equipment to obtain latex with filler and auxiliaries or combination thereof dispersed in the latex, and (c) dehydrating the latex to obtain the rubber composite.

Description

technical field [0001] The invention relates to a method for preparing a rubber composite material and its application, in particular to a method for preparing a rubber composite material by using high-pressure mixing equipment and its application. Background technique [0002] The preparation of rubber composites by dry blending is the most commonly used method in industrial production. Usually, fillers and additives (usually including reinforcing aids, vulcanizing agents, and various compounding additives) are added to the rubber. Made by kneading. The mixing process not only consumes energy but also pollutes the environment. During the mixing process, it is difficult for rubber to "eat powder", and the powder is flying, which pollutes the environment and seriously endangers the health of operators. In addition, due to the limitations of the dry mixing process, the dispersion of anti-aging agents and inorganic fillers in the rubber matrix cannot be very uniform, and sever...

Claims

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Application Information

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IPC IPC(8): C08J3/215C08J3/22C08L21/02
Inventor 韩晶杰马玉录谢林生曾为民
Owner EAST CHINA UNIV OF SCI & TECH
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