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Process for the production of carbon black

a carbon black and process technology, applied in the field of low hysteresis carbon black, can solve the problems of reducing the fuel efficiency destroying the tires made from such rubbers sooner, and reducing the energy loss of the vehicle using the tyr

Inactive Publication Date: 2018-10-25
SKI CARBON BLACK INDIA PPVT LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent aims to provide a cost-effective way to make surface modified carbon black that can be used as reinforcement in rubber and polymers to reduce hysteresis. This modified carbon black is ideal for creating high-performance rubber tires.

Problems solved by technology

The higher the heat build-up, the greater the energy loss of the vehicle using the tyres (hence, lower the fuel efficiency); also, chances are that tires made from such rubbers are destroyed sooner.
The known processes of the prior art require complex process control to obtain carbon black with low hysteresis.

Method used

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  • Process for the production of carbon black
  • Process for the production of carbon black

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0027]500 g of unpelletized carbon black (N234 grade) was taken in a tray and sprayed uniformly with a solution of 2.5 g Na2S in water (500 mL), with slow exposure of all surfaces of the carbon black to the solution. The carbon black was turned over several times over a period of 2 hours, to promote good coverage. The resultant modified carbon black was heated in an oven under a reducing atmosphere, at 800° C. for 8 hours, with a turnover of 4-5 times every 2 hours. The dried modified carbon black was used to prepare a rubber compound and tested (Labeled: N234-1-LAB). The properties of this compound were compared with those of a rubber compound prepared using unmodified carbon black N234 (Labeled: N234-UNMOD).

Preparation of Rubber Compound

[0028]The composition of the tested rubber compounds are provided herein below.

Quantity, parts Ingredientsper hundred (pph)Natural Rubber (RSS4 Grade)75Butadiene Rubber (1220 Grade)25Carbon Black (N234 grade)50Zinc Oxide4Stearic Acid 2Antioxidant (...

example 2

[0031]100 ppm of sodium sulfide (Na2S) per unit mass of carbon black, was added to the manufacturing process in the pelletization step, by adding a 2% solution of Na2S in water (previously prepared) at an appropriate flow-rate into the pelletizer. The treated carbon black was then dried as per the usual industrial process, in a rotary drier. The samples of the treated, pelleted, dried carbon black were collected and compounded with rubber for testing (Labeled: N234-2-IND).

Preparation of Rubber Compound

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

Quantity, parts Ingredientsper hundred (pph)Natural Rubber (RSS4 Grade)75Butadiene Rubber (1220 Grade)25Carbon Black (N234 grade)50Zinc Oxide4Stearic Acid2Antioxidant (6PPD)1.5Sulfur1Accelerator (CBS)1

[0033]The ingredients were mixed on a 2-roll mill at a friction ratio of 1:1.4 for a duration of about 24 minutes. The rollers were maintained at a temperature of 70° C.

Testing of Rubber Properties

[0034]The pro...

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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

FIELD OF DISCLOSURE[0001]The present disclosure relates to a low hysteresis carbon black and an improved process for obtaining the low hysteresis carbon black.BACKGROUND[0002]A variety of carbon blacks are known in the art. These carbon blacks primarily differ in properties from each other and are made by different procedures. The use of the carbon black depends upon its properties. Since the carbon black as such cannot be sufficiently characterized by its chemical composition or by its ingredients, it has become widely accepted to characterize the carbon black by the properties it exhibits. Thus, the carbon black can, for e.g., be characterized by its surface area, which is usually an inverse measurement of the primary particle size. Another important characteristic of the carbon black is its structure, which is a measure of the complexity of the individual carbon black aggregates or of the number of primary particles “fused” together in one carbon black aggregate.[0003]One common ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C09C1/56C08K9/02C09C1/48
CPCC01P2006/80C08K9/02C09C1/48C09C1/56
Inventor RODRIGUEZ, JUANGHOSAL, RANJANNARAYANAN, SUNIL KUMAR
Owner SKI CARBON BLACK INDIA PPVT LTD