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Tire for vehicle wheels comprising crosslinked elastomeric composition

一种弹性组合物、弹性聚合物的技术，应用在车轮、特殊轮胎、轮胎零部件等方向，能够解决胎面硬度、拉伸强度和伸长率添加影响等问题

Active Publication Date: 2009-09-16
PIRELLI TYRE SPA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hardness, tensile strength and elongation of the above-mentioned tread are adversely affected by the addition of the treated granular rubber material

Method used

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  • Tire for vehicle wheels comprising crosslinked elastomeric composition
  • Tire for vehicle wheels comprising crosslinked elastomeric composition
  • Tire for vehicle wheels comprising crosslinked elastomeric composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0111] Surface treatment of vulcanized rubber in subdivided form

[0112] Dispose of mechanically ground waste rubber according to the following procedure. Table 1 discloses the amounts (parts by weight) of the various components relative to 100 parts by weight of the ground waste rubber itself.

[0113] Table 1

[0114] Example 1 vulcanized rubber 100 oxidizing agent 12.65 Surfactant 1.98 water 12.65

[0115] Vulcanized rubber: mechanically ground waste rubber from scrap tires (<0.425 mm (40 mesh) - from Somir);

[0116] Oxidizing agent: Oxyper TM S131, sodium percarbonate obtained from Solvay;

[0117] Surfactant: Polyol from Perstorp Polyols TM PP50.

[0118] The mechanically ground waste rubber was added to a laboratory impeller mixer (BF srl Engineering) and maintained under stirring. Once the temperature reached 80 °C, the oxidizing agent and surfactant were added and the obtained mixture was stirred for 10 min. Then, th...

Embodiment 2

[0120] Preparation of crosslinkable elastomeric compositions

[0121] The crosslinkable elastomeric compositions given in Table 2 were prepared as follows (amounts of the various components given in phr).

[0122] All components except sulfur and accelerator were mixed together in an internal mixer (model Pomini PL 1.6) for about 5 minutes (first step). Once the temperature reached 145±5°C, the elastomeric composition was discharged. Sulfur and accelerators are then added and mixed in the mill (second stage).

[0123] Table 2

[0124]

[0125] (c) Comparison (i) Invention

[0126] NR: natural rubber;

[0127] BR: cis-1,4-polybutadiene ( BR 40-EniChemElastomeri);

[0128] SBR: Styrene-butadiene rubber (Buna VLS 5025-1 HM-Bayer AG)

[0129] Silica: Precipitated silica ( 1165 MP-Rhone-Poulenc);

[0130] 6: Mixture of zinc salts of fatty acids (palmitic acid, stearic acid and oleic acid present in major amounts) (Great Lakes Chemical Corp.);

[0131] vulcaniz...

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Abstract

A tire for vehicle wheels, comprising at least one structural element obtained by crosslinking a crosslinkable elastomeric composition comprising at least one vulcanized rubber in a subdivided form surface treated with at least one oxidizing agent; at least one diene elastomeric polymer; and at least one sulfur-based vulcanizing agent. The invention also relates to the surface treatment process of the vulcanized rubber and the crosslinkable elastomeric composition obtained with the vulcanized rubber in a subdivided form surface treated with at least one oxidizing agent.

Description

technical field [0001] The invention relates to wheel tires. [0002] More specifically, the invention relates to tires for vehicle wheels comprising at least one structural member obtained by crosslinking a crosslinkable elastomeric composition comprising at least one vulcanizate as defined above in finely divided form. [0003] Furthermore, the present invention relates to a crosslinkable elastomeric composition as defined above. [0004] In another aspect, the present invention also relates to a method for the manufacture of said crosslinkable elastic composition. Background technique [0005] The increased production of industrial rubber products has led to the accumulation of large amounts of rubber waste, usually disposed of in dedicated landfills, the main disadvantages of which are environmental pollution and the need for huge dedicated areas for storing said waste. [0006] It is known in the art to depolymerize waste rubber, such as tires, to reduce the volume of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J11/18C08L21/00B60C1/00C08L19/00
CPCC08L19/003C08L23/16C08L21/00C08C19/08B60C1/0016C08L2205/03C08L9/06C08K3/02C08K5/14C08L7/00C08L9/00Y10T152/10495C08L2666/08
Inventor E·雷斯米尼L·罗斯埃罗D·蒂雷利F·佩鲁佐蒂
Owner PIRELLI TYRE SPA
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