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Pneumatic tire with rubber component containing epoxidized palm oil

A technology of pneumatic tires and palm oil, applied to special tires, tire parts, wheels, etc., can solve problems such as loss of viscosity

Inactive Publication Date: 2013-05-22
THE GOODYEAR TIRE & RUBBER CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially problematic is the loss of tack in the aforementioned components of large industrial and off-highway tires

Method used

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  • Pneumatic tire with rubber component containing epoxidized palm oil
  • Pneumatic tire with rubber component containing epoxidized palm oil
  • Pneumatic tire with rubber component containing epoxidized palm oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] In this example, a rubber composition including epoxidized palm oil will be described. The rubber compound is prepared by multiple mixing steps. The formulation of this mixture is shown in Table 1, where all amounts are in phr. The physical properties of the samples were tested, and the results are shown in Table 2.

[0056] SBAT corresponds to ASTM D1871 Method 1.

[0057] A Flexsys MV2000 was used to measure Mooney viscosity (ML.sub.1+4 (100°C)) and Mooney scorch (t+5, T+20).

[0058] The viscoelastic properties Tan Delta and G' were measured using an Alpha Technologies Rubber Processing Analyzer (RPA). A description of the RPA 2000 and its capabilities, sample preparation, tests and subtests can be found in the literature listed below. H A Pawlowski and J S Dick, Rubber World, June 1992; J S Dick and H A Pawlowski, Rubber World, January 1997; and J S Dick and J A Pawlowski, Rubber & Plastics News, Apr. 26 and May 10, 1993.

[0059] Table 1

[0060]

[0061] ...

Embodiment 2

[0066] In this example, the tack retention of a tire component prepared with a rubber composition including epoxidized palm oil will be illustrated. The "tackiness" or tackiness of a rubber component is relative to the adhesion and bond retention of the component to other tire components during the tire manufacturing process. Some tire components, including beads, apexes, and sidewall covers are typically prepared prior to tire manufacture and may be stored for several weeks prior to use.

[0067] Beads made using the mixture described in Example 1 were stored for up to 3 months and evaluated for stickiness. The results of the evaluation show that the beads prepared using the epoxidized palm oil according to the invention have at least 50% higher viscosity retention than the control beads.

[0068] The measurement of the above viscosity was carried out using the technique described in the publication "Role of Phenolic Tackifiers in Polyisoprene Rubber, F.L. Magnus and G.R. Ha...

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Abstract

The present invention is directed to a pneumatic tire comprising at least one component selected from the group consisting of beads, apexes, and sidewall veneers, the at least one component comprising a rubber composition, the rubber composition comprising at least one diene based elastomer and an epoxidized palm oil wherein the rubber composition comprises less than 1 phr of stearic acid.

Description

technical field [0001] The present invention relates to a pneumatic tire, in particular to a pneumatic tire having a rubber component comprising epoxidized palm oil. Background technique [0002] Vulcanization or curing is the process of mixing natural and / or synthetic elastomers with various materials which, when applied with heat, will cause the elastomer to crosslink. These materials are often blended with elastomers to help improve the cured physical properties of the elastomer, such as tensile strength and temperature sensitivity. Vulcanization and improved properties can be achieved by reacting green elastomers with sulfur in the presence of other curing activators. Fatty acids, namely oleic acid and stearic acid, are commonly used as activators during the vulcanization of diene rubber in the presence of zinc oxide and accelerators. In the early stages of vulcanization, zinc carboxylate (the reaction product of zinc oxide and fatty acid) reacts with the accelerator t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L21/00C08K13/02C08K3/04C08K3/36C08K3/22C08K5/15C08K5/1515B60C1/00
CPCC08K5/09B60C1/0025C08K5/103B60C1/00Y10T152/10846C08L21/00
Inventor M·维德特A·弗兰岑P·W·S·库尼什
Owner THE GOODYEAR TIRE & RUBBER CO
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