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A kind of natural rubber/modified white carbon black composite material and preparation method thereof

A technology of natural rubber and composite materials, which is applied in the field of rubber and can solve problems such as poor dispersion of silica, reduced mechanical properties of composite materials, and unstable epoxy groups

Active Publication Date: 2018-10-16
AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the epoxy group in epoxidized natural rubber is not stable, it is easy to open the ring, so the dispersion of silica in the rubber matrix is ​​still poor, and the mechanical properties of the composite material will be reduced, especially the tearing. Reduced strength, improved heat generation

Method used

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  • A kind of natural rubber/modified white carbon black composite material and preparation method thereof
  • A kind of natural rubber/modified white carbon black composite material and preparation method thereof

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preparation example Construction

[0030] The present invention provides the preparation method of natural rubber / modified white carbon black composite material described in above-mentioned scheme, comprises the following steps:

[0031] ultrasonically dispersing the rare earth salt of mercaptoacetic acid and lignosulfonate in water to obtain a dispersion of rare earth salt of modified thioglycolic acid;

[0032] Mixing the modified thioglycolic acid rare earth salt dispersion with the milky epoxidized natural rubber for heat treatment to obtain the modified milky epoxidized natural rubber;

[0033] After mixing the modified milky epoxidized natural rubber and the white carbon black aqueous solution, sequentially coagulate and dry to obtain the modified white carbon black;

[0034] The modified white carbon black, natural rubber and vulcanization processing aid are mixed and then vulcanized to obtain a natural rubber / modified white carbon black composite material.

[0035] In the invention, the rare earth salt o...

Embodiment 1

[0047] A kind of natural rubber / modified white carbon black composite material, comprises the component of following parts by weight: 100 parts of natural rubber, 0.1 part of lanthanum thioglycolate, 0.05 part of sodium lignosulfonate, 20 parts of milky epoxidized natural rubber in dry rubber 10 parts of white carbon black, 1.5 parts of sulfur, 1.5 parts of accelerator NS, 4 parts of zinc oxide, and 1 part of stearic acid.

[0048] The preparation method of the above-mentioned natural rubber / modified silica composite material is as follows: add 0.1 part of lanthanum thioglycolate to 20 parts of deionized, control the ultrasonic power to 750W, and add 0.05 part of lignosulfonate in the state of ultrasonic dispersion Sodium thioglycolate, placed in a water bath at 50°C and continuously stirred for 5 hours, the stirring rate was controlled at 400r / min to prepare modified lanthanum thioglycolate, which was set aside;

[0049] 20 parts of milky epoxidized natural rubber (epoxidatio...

Embodiment 2

[0054] A kind of natural rubber / modified silica composite material, comprises the component of following parts by weight: 100 parts of natural rubber, 5 parts of cerium thioglycolate, 0.1 part of calcium lignosulfonate, 5 parts of emulsified epoxidized natural rubber in dry rubber 30 parts of white carbon black, 2.25 parts of sulfur, 0.7 parts of accelerator NS, 5 parts of zinc oxide, and 1 part of stearic acid.

[0055] The preparation method of the above-mentioned natural rubber / modified silica composite material is as follows: add 5 parts of cerium thioglycolate to 25 parts of deionized, control the ultrasonic power to 1000W, and add 0.1 part of lignin sulfonate in the state of ultrasonic dispersion Calcium thioglycolate, placed in a water bath at 80°C and continuously stirred for 0.2h, the stirring rate was controlled at 400r / min to prepare modified cerium thioglycolate, which was set aside;

[0056] Heat treatment of milky epoxidized natural rubber (epoxidation degree 25)...

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Abstract

The invention provides a natural rubber / modified white carbon black composite. The natural rubber / modified white carbon black composite is prepared from, by weight, 100 parts of natural rubber, 0.1-10 parts of mercaptoacetic acid rare-earth salt, 0.05-0.2 part of mercaptoacetic acid, 0.2-20 parts of dry glue meter emulsive epoxidized natural rubber, 10-100 parts of white carbon black and 0.2-12 parts of vulcanized processing aid. The natural rubber / modified white carbon black composite is good in mechanical property and low in thermogenesis and has the excellent fatigue resistance.

Description

technical field [0001] The invention relates to the technical field of rubber, in particular to a natural rubber / modified white carbon black composite material and a preparation method thereof. Background technique [0002] There are a large number of hydroxyl groups and unsaturated bonds on the surface of silica, which makes the surface hydrophilic, strong in polarity, and easy to absorb water and connect to each other to form a three-dimensional network structure with strong intermolecular force. Agglomeration is easy to occur, and it is not easy to disperse in the rubber matrix, so it is often necessary to modify the white carbon black. [0003] The epoxy groups in the molecular chain of epoxidized natural rubber are reactive, and can form strong dipole, hydrogen bond and even covalent bond interactions with the surface of silica, which can improve the dispersion of silica in the rubber matrix. However, since the epoxy group in epoxidized natural rubber is not stable, it...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L7/00C08L15/00C08L97/00C08K13/06C08K5/37C08K3/06C08K5/47C08K3/22C08K5/09C08K9/04C08K3/36
CPCC08K2003/2296C08L7/00C08L2201/08C08L2205/03C08L15/00C08L97/005C08K13/06C08K5/37C08K3/06C08K5/47C08K3/22C08K5/09C08K9/08C08K3/36
Inventor 杨昌金彭政钟杰平许逵廖禄生王兵兵林宏图
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI