Natural rubber-white carbon black composite material and preparation method and applications thereof

A composite material and natural rubber technology, applied in the field of rubber materials, can solve the problems of adverse effects of rubber material properties, poor dispersion of silica, low mechanical properties, etc. Effect

Inactive Publication Date: 2019-07-05
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

[0002] There are a large number of hydroxyl groups and unsaturated bonds on the surface of silica, which is prone to agglomeration and is not easy to disperse in the rubber matrix, thus adversely affecting the properties of rubber materials
In the prior art, there are reports of adopting rare earth salts of thioglycolic acid to modify white carbon black, but there is still the problem of poor dispersion of white carbon black in the rubber composite materials prepared by using rare earth salts of thioglycolic acid modified white carbon black, resulting in rubber composite materials There are problems of low mechanical properties and high heat generation properties

Method used

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Examples

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Effect test

preparation example Construction

[0041] The present invention provides the preparation method of natural rubber-white carbon black composite material described in above-mentioned technical scheme, comprises the following steps:

[0042] Dispersing the tea polyphenol rare earth complex and lignosulfonate in water to obtain a modified tea polyphenol rare earth complex dispersion;

[0043] Mixing the modified tea polyphenol rare earth complex dispersion with epoxidized natural rubber latex and then mixing with the water dispersion of white carbon black to obtain the water dispersion of modified white carbon black;

[0044] The modified white carbon black aqueous dispersion is mixed with the natural rubber latex followed by coagulation treatment and drying to obtain a dry rubber state composite material precursor;

[0045] The dry rubber state composite material precursor and the vulcanization processing aid are mixed and then vulcanized to obtain a natural rubber-white carbon black composite material.

[0046] ...

Embodiment 1

[0058] In terms of parts by mass, add 4 parts of tea polyphenol lanthanum to 20 parts of deionization, add 0.2 parts of sodium lignosulfonate under the condition of ultrasonic power of 700W, place it in a water bath at 40°C, and keep it in an ultrasonic state. Under the condition of 400r / min, ultrasonically stir for 1h to obtain the modified tea polyphenol lanthanum dispersion;

[0059] The modified tea polyphenol lanthanum dispersion and 8 parts of dry rubber epoxidized natural rubber latex (the degree of epoxidation is 50, and the solid content is 10%) are ultrasonicated in a 40°C water bath, 700W, and 400r / min. Stir and mix for 1h, then add the water dispersion of white carbon black (the content of white carbon black in the water dispersion of white carbon black is 10wt%, wherein, the addition amount of white carbon black is 60 parts), in 40 ℃ water bath, 700W , Ultrasonic stirring and mixing for 0.5h under the condition of 400r / min to obtain the modified silica aqueous dis...

Embodiment 2

[0063] In terms of parts by mass, 0.1 part of cerium tea polyphenol was added to 30 parts of deionization, and 0.05 part of calcium lignosulfonate was added under the condition of ultrasonic power of 1000W, placed in a water bath at 70°C, and kept in an ultrasonic state. Under the condition of 200r / min, ultrasonically stir for 0.1h to obtain the modified tea polyphenol cerium dispersion;

[0064] The modified tea polyphenol cerium dispersion and 0.2 parts of dry rubber epoxidized natural rubber latex (epoxidation degree is 2, solid content is 20%) are ultrasonicated under the conditions of 70 ℃ water bath, 1000W, 200r / min Stir and mix for 0.1h, then add the water dispersion of white carbon black (the content of white carbon black in the water dispersion of white carbon black is 20wt%, wherein, the addition of white carbon black is 10 parts), in 70 ℃ water bath, Under the conditions of 1000W and 200r / min, ultrasonically stirred and mixed for 3 hours to obtain a modified silica ...

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Abstract

The invention relates to the technical field of rubber materials, and specifically relates to a natural rubber-white carbon black composite material and a preparation method and applications thereof.The provided natural rubber-white carbon black composite material comprises following raw materials in parts by weight: 100 parts of natural rubber latex calculated by dry rubber, 10 to 60 parts of white carbon black, 0.2 to 8 parts of epoxy natural rubber latex calculated by dry rubber, 0.1 to 4 parts of a tea polyphenol-rare earth complex, 0.05 to 0.2 part of lignosulfonate, and 0.2 to 12 partsof a vulcanization processing aid. The tea polyphenol-rare earth complex and the epoxy natural rubber latex are used to modify white carbon black; the dispersing property of white carbon black in natural rubber latex is improved; and the obtained natural rubber-white carbon black composite material has good mechanical properties and a low heat generation performance.

Description

technical field [0001] The invention relates to the technical field of rubber materials, in particular to a natural rubber-white carbon black composite material and its preparation method and application. Background technique [0002] There are a large number of hydroxyl groups and unsaturated bonds on the surface of silica, which is prone to agglomeration and is not easy to disperse in the rubber matrix, thus adversely affecting the properties of rubber materials. In the prior art, there are reports of adopting rare earth salts of thioglycolic acid to modify white carbon black, but there is still the problem of poor dispersion of white carbon black in the rubber composite materials prepared by using rare earth salts of thioglycolic acid modified white carbon black, resulting in rubber composite materials There are problems of low mechanical properties and high heat generation properties. Contents of the invention [0003] The object of the present invention is to provide...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08K9/04C08K3/36C08K3/22C08K5/09B29C35/02
CPCB29C35/02C08K3/22C08K3/36C08K5/09C08K9/04C08K9/08C08K2003/2296C08L7/02
Inventor 杨昌金彭政廖禄生许逵钟杰平
Owner AGRI PRODS PROCESSING RES INST CHINESE ACAD OF TROPICAL AGRI SCI
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