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A kind of preparation method of rubber composition containing highly dispersed carbon nanotubes

A rubber composition and carbon nanotube technology, which can be used in transportation and packaging, rolling resistance optimization, special tires, etc., can solve the problems of easy agglomeration, poor adhesion between carbon nanotubes and solution-polymerized styrene-butadiene rubber matrix, etc.

Active Publication Date: 2021-05-28
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention not only effectively solves the problem that carbon nanotubes are prone to agglomeration during long-term storage and high-temperature and high-shear processing, but also solves the problem of poor bonding between carbon nanotubes and solution-polymerized styrene-butadiene rubber matrix. High Dispersion of Carbon Nanotubes in Solution Polystyrene Butadiene Rubber Matrix

Method used

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  • A kind of preparation method of rubber composition containing highly dispersed carbon nanotubes
  • A kind of preparation method of rubber composition containing highly dispersed carbon nanotubes
  • A kind of preparation method of rubber composition containing highly dispersed carbon nanotubes

Examples

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Comparison scheme
Effect test

Embodiment 1

[0045] (1) Preparation of highly dispersed carbon nanotubes:

[0046] 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.

[0047] b Preparation of grafted solution-polymerized styrene-butadiene mortar: first add 300 parts of cyclohexane to the polymerization kettle, then add 100 parts of solution-polymerized styrene-butadiene mortar SSBR2564s, 0.05 parts of tert-dodecyl mercaptan in turn, and replace with nitrogen , add 1 part of methacrylamide, sti...

Embodiment 2

[0051] (1) Preparation of highly dispersed carbon nanotubes:

[0052] a The preparation of amination of carbon nanotubes: the same as in Example 1.

[0053] Preparation of b grafted solution-polymerized styrene-butadiene mortar: same as Example 1.

[0054] c Preparation of highly dispersed carbon nanotubes: Take 100 parts of aminated carbon nanotubes a and 350 parts of cyclohexane and add them to the polymerization kettle and stir and mix for 15 minutes; The temperature was raised to 60° C., and after stirring and reacting for 3 hours, high-dispersion carbon nanotubes were obtained through flash evaporation, drying and grinding.

[0055] (2) Preparation of solution-polymerized styrene-butadiene rubber composition for tread: Take 100 parts of solution-polymerized styrene-butadiene rubber SSBR2564s (dry rubber) and 60 parts of cyclohexane into the coagulation kettle and stir and mix for 10 minutes, then add 20 parts of high For dispersed carbon nanotubes, when the temperature ...

Embodiment 3

[0057] (1) Preparation of highly dispersed carbon nanotubes:

[0058] 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.

[0059] b Preparation of grafted solution-polymerized styrene-butadiene mortar: first add 450 parts of cyclohexane to the polymerization kettle, then add 100 parts of solution-polymerized styrene-butadiene mortar SSBR2564s, 0.3 parts of tert-dodecyl mercaptan in sequence, and replace with nitrogen , add 7 parts of methacrylamide, stir an...

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Abstract

The purpose of the present invention is to provide a solution-polymerized styrene-butadiene rubber composition containing highly dispersed carbon nanotubes. The invention uses strong oxidizing acids and polyamines to aminate the surface of carbon nanotubes, and then uses unsaturated vinyl The amide-like polar monomer is grafted and polymerized to the solution-polymerized styrene-butadiene mortar, and then directly mixed and coagulated with the solution-polymerized styrene-butadiene mortar after coating treatment to prepare a product with good wet skid resistance, high wear resistance, and rolling Rubber composition with low resistance. The preparation method of the invention avoids the problems of slippage, scorching and uneven dispersion of the rubber material in traditional banbury or open-mix rubber processing. 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 high-dispersion type carbon nanotube filled solution-polymerized styrene-butadiene rubber used 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 resistance and oth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L9/06C08K9/10C08K7/24B60C1/00
CPCY02T10/86
Inventor 徐典宏唐艺桐李金山张永霞党莹胡海华李波
Owner PETROCHINA CO LTD
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