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Preparation method of rubber composition containing highly dispersed carbon nanotubes

A technology of rubber composition and carbon nanotubes, applied in transportation and packaging, rolling resistance optimization, special tires, etc., can solve the problems of uneven dispersion, easy agglomeration, affecting the effect of filling and modification, etc.

Active Publication Date: 2021-07-02
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, carbon nanotubes are nano-scale materials with small particle size, large specific surface area, high surface energy, easy aggregation, and poor bonding with the rubber matrix. They are easy to aggregate into useless particles during the mixing process of rubber materials. Agglomerates, resulting in uneven dispersion, which will not only affect the filling modification effect, but also damage the performance of rubber materials

Method used

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  • Preparation method of rubber composition containing highly dispersed carbon nanotubes
  • Preparation method of rubber composition containing highly dispersed carbon nanotubes

Examples

Experimental program
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Effect test

Embodiment 1

[0044] (1) Preparation of highly dispersed carbon nanotubes:

[0045] a The preparation of amination of carbon nanotubes: 100 parts of carbon nanotubes, 150 parts of concentrated nitric acid, 50 parts of concentrated sulfuric acid, and 10 parts of potassium permanganate are mixed in a reactor, treated with 50 kHz ultrasonic waves for 1 hr, and then heated to At 50°C, stir and cook with acid for 2 hours, cool, filter, and wash until the filtrate is neutral, then add 200 parts of hexamethylenetetramine, then heat to 70°C, stir and react for 2 hours, filter with suction, wash, and dry. The carbon nanotube a with amine groups on the surface is obtained.

[0046] b Preparation of acylated solution-polymerized styrene-butadiene mortar: first add 100 parts of solution-polymerized styrene-butadiene mortar SSBR2564s and 100 parts of cyclohexane into the polymerization kettle, stir and heat, and when the temperature of the polymerization kettle reaches 30°C, Quickly add 0.01 part of Al...

Embodiment 2

[0050] (1) Preparation of highly dispersed carbon nanotubes:

[0051] a The preparation of amination of carbon nanotubes: the same as in Example 1.

[0052] The preparation of b acylated solution-polymerized styrene-butadiene mortar: the same as in Example 1.

[0053] c Preparation of highly dispersed carbon nanotubes: Take 100 parts of aminated carbon nanotubes a, 1.5 parts of diphenylmethane diisocyanate, and 350 parts of cyclohexane and add them to the polymerization kettle and stir and mix for 15 minutes; then add 9 parts of acylation solvent Styrene butadiene mortar a, stirred and heated to 45°C, stirred for 3 hours, then flashed, dried, and ground to prepare highly dispersed carbon nanotubes.

[0054] (2) Preparation of solution-polymerized styrene-butadiene rubber composition for tread: Take 100 parts of solution-polymerized styrene-butadiene rubber SSBR2564s (dry rubber) and 120 parts of cyclohexane into the coagulation kettle and stir and mix for 15 minutes, then add...

Embodiment 3

[0056] (1) Preparation of highly dispersed carbon nanotubes:

[0057] a The preparation of amination of carbon nanotubes: put 100 parts of carbon nanotubes, 180 parts of concentrated nitric acid, 70 parts of concentrated sulfuric acid, and 30 parts of potassium permanganate into the reactor and mix them together, treat them with 80kHz ultrasonic wave for 1.5hr, and then heat Stir and cook for 5 hours at 70°C, cool, filter, and wash until the filtrate is neutral, then add 300 parts of hexamethylenetetramine, then heat to 80°C, stir for 3 hours, filter with suction, wash, and dry , to obtain carbon nanotubes b with amine groups on the surface.

[0058] b. Preparation of acylated styrene-butadiene solution glue: first add 100 parts of solution-polymerized styrene-butadiene glue SSBR2564s and 200 parts of cyclohexane into the polymerization kettle, stir and heat, and when the temperature of the polymerization kettle reaches 40°C, under stirring conditions Quickly add 0.13 parts o...

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Abstract

The purpose of the present invention is to provide a modification method of high dispersion of rubber filler carbon nanotubes. The invention adopts strong oxidizing acid and polyamine to carry out amination treatment on the surface of carbon nanotubes, and then uses acid anhydride to carry out acylation treatment on the solution-polymerized styrene-butadiene mortar, and finally carries out coating treatment under the action of diisocyanate, and then combines with solution-polymerization. The styrene-butadiene mortar is directly mixed and agglomerated to prepare a rubber composition with good wet skid resistance, high abrasion resistance and low rolling resistance. The preparation method of the invention avoids the problems of slipping, scorching and the like of the rubber compound in the traditional banburying or open-kneading rubber processing, ensures that the carbon nanotube particles can be uniformly dispersed in the solution-polymerized styrene-butadiene rubber body matrix, and enables the The balance of the performance of the "devil triangle" is obviously improved, and the method is simple, easy to implement, low in cost, non-polluting to the environment, and suitable for industrial production.

Description

technical field [0001] The invention relates to a rubber composition, in particular to a solution-polymerized styrene-butadiene rubber composition filled with highly dispersed carbon nanotubes for tire treads and a preparation method thereof. Background technique [0002] Under the background that low-carbon and green have become the consensus of the whole society, the automobile tire industry is actively adapting to and guiding this trend and trend, and the requirements for high-performance tires are also getting higher and higher. This requires that the performance balance of the "devil's triangle" tire tread rubber must be significantly improved, that is to say, the tire tread rubber should have excellent wear resistance and low wear resistance while having good wet skid resistance. rolling resistance. With the emergence of high-modulus and high-strength carbon nanotubes (CarbonNanotube, referred to as CNT), it will endow high-strength, low-expansion, high-wear resistanc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08L15/00C08K13/06C08K9/02C08K9/04C08K9/10C08K7/24C08C19/00B60C1/00
CPCY02T10/86
Inventor 徐典宏唐艺桐刘敏张永霞党莹王立鹏胡海华
Owner PETROCHINA CO LTD
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