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Preparation of reinforced rubber and use in tires

a technology of reinforced rubber and rubber composition, which is applied in the field of rubber composition preparation, can solve the problems of not being able to readily liberate free sulfur from disulfide, not being a good sulfur donor, and organosilane polysulfide, so as to improve the properties of vulcaniza

Inactive Publication Date: 2001-10-25
THE GOODYEAR TIRE & RUBBER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach enhances the vulcanization of rubber compositions by delaying free sulfur release until higher temperatures, improving tensile strength, elongation, and modulus ratios without adversely affecting rebound values, leading to better wear performance and processing characteristics.

Problems solved by technology

It is, however, considered herein that an organosilane polysulfide compound, which is primarily a disulfide, having an average of about 2.6 or less sulfur atoms in its polysulfidic bridge, is not normally a good sulfur donor under such mixing conditions, due to the relatively strong sulfur-to-sulfur bonds typical of an organosilane disulfide--as compared to an organosilane polysulfide with an average of at least 3.5 sulfur atoms in its polysulfidic bridge.
However, it is considered herein that such disulfide does not ordinarily readily liberate free sulfur in such aforementioned rubber / silica / coupler mixing operation.

Method used

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  • Preparation of reinforced rubber and use in tires
  • Preparation of reinforced rubber and use in tires

Examples

Experimental program
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Effect test

example ii

[0156] Tires of size 195 / 65R15 were prepared which individually used the rubber compositions of Exs. 1, 2 and 3 of Example I for their treads and are correspondingly referred to as Exs. 1, 2 and 3 in this Example II. The following results were obtained as shown in Table 3 with the values for the control, Ex. 1, being normalized to a value of 100 and corresponding values for Ex. 2 and Ex. 3 being comparatively reported to the Control Ex. 1.

[0157] For the normalized values reported in Table 3, a higher value for rolling resistance means lower resistance to rolling so that a higher value is better; a higher value for treadwear means less tread wear so that a higher value is better; and a higher value for wet skid means greater traction and resistance to skidding on a wet surface so that a higher value is better.

3 TABLE 3 Ex. 1 Ex. 2 Ex. 3 Rolling Resistance 100 101 101 Treadwear 100 102 111 Wet skid 100 102 103

[0158] This Example demonstrates that a tire with a tread of the rubber comp...

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Abstract

The invention relates to the preparation of a rubber composition containing silica-based filler reinforcement through the utilization of a organosilane disulfide compound mixed with a rubber composition in at least one preparatory, non-productive, mixing stage followed by utilization of an organosilane polysulfide compound mixed with the rubber composition in a subsequent, productive, mixing stage. The invention further relates to the resulting rubber composition and use thereof in tires.

Description

FIELD[0001] This invention relates to the preparation of rubber compositions which contain silica-based reinforcement and utilizing an organosilane disulfide compound mixed with a rubber composition in at least one non-productive mixing stage followed by utilization of an organosilane polysulfide compound in a subsequent productive mixing stage.[0002] The invention also relates to such prepared rubber compositions and particularly to tires having treads thereof.[0003] For various applications utilizing rubber which require high strength and abrasion resistance, particularly applications such as tires and various industrial products, sulfur-cured rubber is utilized which contains substantial amounts of reinforcing fillers. Carbon black is commonly used for such purpose and normally provides or enhances good physical properties for the sulfur cured rubber. Particulate, precipitated silica is also sometimes used for such purpose, particularly when the silica is used in conjunction with...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): C08K5/548
CPCC08K5/548C08L21/00Y10S152/905
Inventor MATERNE, THIERRY FLORENT EDME`AGOSTINI, GIORGIOTHISE, GHISLAIN ADOLPHE LEON
Owner THE GOODYEAR TIRE & RUBBER CO