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An improved process for the production of carbon black

A carbon black and process technology, applied in fibrous fillers, rolling resistance optimization, road transportation emission reduction, etc., can solve low hysteresis, complex and other problems

Active Publication Date: 2014-11-05
ADITYA BIRLA NUVO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The known processes of the prior art require complex process control to obtain carbon blacks with low hysteresis

Method used

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  • An improved process for the production of carbon black
  • An improved process for the production of carbon black
  • An improved process for the production of carbon black

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 500 g of ungranulated carbon black (grade N234) was placed in a tray and washed with 2.5 g Na 2 A solution of S in water (500 mL) was sprayed evenly and all surfaces of the carbon black were slowly exposed to the solution. The carbon black was flipped several times over a 2 hour period to promote good coverage. The obtained modified carbon black was heated in an oven at 800° C. for 8 hours under a reducing atmosphere, and turned over 4-5 times every 2 hours. Rubber compounds were prepared and tested using the dry modified carbon black (designation: N234-1-LAB). The properties of this compound were compared with those of a rubber compound prepared using unmodified carbon black N234 (designation: N234-UNMOD).

[0031] Preparation of Rubber Compounds

[0032] The compositions of the rubber compounds tested are provided below.

[0033] Element

Quantity, percentage (pph)

Natural Rubber (RSS4 Level)

75

Butadiene rubber (1220 grade)

25...

Embodiment 2

[0040] by adding Na 2 A 2% solution of S in water (previously prepared) was added to the granulator at an appropriate flow rate, and 100 ppm of sodium sulfide (Na 2 S) added to the granulation step of the manufacturing process. The treated carbon black was then dried in a rotary dryer according to common industrial processes. Samples of treated, granulated, dried carbon black were collected and compounded with rubber for testing (mark: N234-2-IND).

[0041] Preparation of Rubber Compounds

[0042] The compositions of the rubber compounds tested are provided below.

[0043] Element

Quantity, percentage (pph)

Natural Rubber (RSS4 Level)

75

Butadiene rubber (1220 grade)

25

Carbon black (N234 grade)

50

Zinc oxide

4

stearic acid

2

Antioxidant (6PPD)

1.5

sulfur

1

Accelerator (CBS)

1

[0044] These ingredients were mixed with a two-roll mill (friction ratio: 1:1.4) for ...

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Abstract

A process for producing surface modified carbon black is disclosed. The process comprises the step of treating carbon black with a sulfur compound in an amount in the range of 0.005%-1% of the carbon black to effect in situ formation of surface groups to produce the surface modified carbon black which when combined with a polymer composition alters the carbon black-polymer interaction to decrease the hysteresis of the polymer composition. The curing time required for polymer composition comprising the surface modified carbon black is also decreased. The preferred sulfur compounds are sulfite or sulfate salts.

Description

technical field [0001] The present disclosure relates to a low hysteresis carbon black and an improved process for obtaining said low hysteresis carbon black. Background technique [0002] A variety of carbon blacks are known in the art. These carbon blacks differ from each other mainly in properties and are produced by different procedures. The use of carbon black depends on its properties. Because carbon black itself cannot be adequately characterized by its chemical makeup or by its constituents, it has been widely accepted to characterize carbon black by the properties it exhibits. Thus, carbon black can be characterized, for example, by its surface area, which is generally the inverse measure of primary particle size. Another important characteristic of carbon black is its structure, which is a measure of the complexity of individual carbon black aggregates or the number of primary particles "fused" together in a carbon black aggregate. [0003] A common application...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/48C01B31/12C08K3/04
CPCC09C1/56C01P2006/80C09C1/48C08K9/02
Inventor R·朱安G·兰詹N·S·库玛尔
Owner ADITYA BIRLA NUVO
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