Inflatable tire

A technology for pneumatic tires and treads, applied in special tires, tire parts, rolling resistance optimization, etc., can solve the problems of not considering deformation, not considering the inhibition of deformation of the bottom of the main groove, etc., and achieve the effect of good rolling resistance

Active Publication Date: 2013-08-14
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, no consideration is given to suppressing deformation in the bottom of the main trench
Further, although a pneumatic tire having a tread of a cap tread / base tread double-layer structure is described in, for example, JP 2011-1521A, no consideration is given to suppressing deformation in the bottom of the main groove

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0132] Although the present invention has been described in detail with reference to examples, the present invention is not limited thereto.

[0133] Various chemicals used in Examples and Comparative Examples are explained below.

[0134] High cis BR: CB 25 (manufactured by Lanxess AG, high cis BR obtained by using Nd catalyst, Mooney viscosity ML l+4 : 44, Mw / Mn: 1.78, Mw: 500,000, Mn: 280,000, cis-1,4 bond content ratio: 96.2 mass%, trans-1,4 bond content ratio: 3.1 mass%, vinyl content: 0.7 quality%)

[0135] Modified BR: BR1250H (manufactured by Zeon Co., polymerized by using lithium as an initiator, vinyl bond content: 10 to 13% by mass, Mw / Mn: 1.5, tin atom content: 250ppm)

[0136] BR containing SPB: VCR617 (manufactured by Ube Industries, Ltd., suspension of 1,2-syndiotactic polybutadiene crystals, melting point of 1,2-syndiotactic polybutadiene crystals: 200°C, boiling The n-hexane insoluble matter content: 15-18% by mass, 1,2-syndiotactic polybutadiene crystal co...

preparation example A1～A28

[0163] Preparation Examples A1 to A28 (Rubber Compositions for Cap Treads)

[0164] Using various chemicals as shown in Tables 1 to 3, a kneading process X in which the rubber component, carbon black total volume, and silica half volume were kneaded (extrusion temperature: 150° C., 4 minutes) was performed; A kneading process Y in which chemicals other than the vulcanizing agent (sulfur, vulcanization accelerator, crosslinking agent) are mixed with the compound obtained in the kneading process X and kneaded (extrusion temperature: 150°C, 3 minutes); and further A kneading process F of mixing a vulcanizing agent and kneading (extrusion temperature: 100° C., 3 minutes) to obtain an unvulcanized rubber composition for a cap tread. Here, in the case of using a mercapto silane coupling agent (silane coupling agents 2 and 3), the kneading temperature in the kneading process X and the kneading process Y was changed to 140° C. to prevent scorching of the rubber. produce.

preparation example B1～B6

[0165] Production Examples B1 to B6 (Rubber Compositions for Base Treads)

[0166] Using various chemicals as shown in Table 4, a kneading process X in which chemicals other than the vulcanizing agent (sulfur, vulcanization accelerator, crosslinking agent) were kneaded (extrusion temperature: 150° C., 4 minutes) was performed; And a kneading process F was performed in which a vulcanizing agent was further mixed and kneaded (extrusion temperature: 100° C., three minutes), thereby obtaining an unvulcanized rubber composition for a base tread.

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Abstract

The object of the invention is to provide an inflatable tire with good rolling resistance, wet land performance and wear-resistance, wherein the generation of groove cracks on the surface of the tire is inhibited. The inflatable tire is an inflatable tire with a surface, and the surface comprises a drive surface and a base part. The drive surface is prepared by a rubber combination for the drive surface, and the rubber combination comprises a preset amount of silicon dioxide that has a 70-300m2 / g BET specific surface area, a preset amount of carbon black and / or inorganic filler, and 0.5-5 parts in weight of release agent, wherein the release agent comprises at least one of a group that consists of fee fatty acid metal salt, fatty acid amides and amide ester. The base part is prepared by a rubber combination for the base part, and based on the weight parts, the rubber combination comprises a preset amount of carbon black and / or silicon dioxide that has a 70-300m2 / g BET specific surface area.

Description

technical field [0001] The present invention relates to a pneumatic tire. Background technique [0002] In recent years, a wide range of properties is required for pneumatic tires, and especially tires for passenger cars and commercial vehicles are required to have excellent rolling resistance (low heat build-up), friction on roads (wet performance and dry performance) in a well-balanced manner. capacity) and wear resistance. [0003] Conventionally, in order to obtain a tire excellent in rolling resistance, friction on road, and wear resistance in a well-balanced manner, various methods have been employed. For example, it is known to prepare a tread having a cap tread / base tread two-layer structure, in which a rubber composition having on-road (wet ability and dry ability) friction and abrasion resistance is used for the tread A cap surface, and a rubber composition having low heat build-up properties are used for the base tread. [0004] Furthermore, it is known that by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08K13/02C08K3/36C08K3/04C08K5/098C08K5/20C08K5/31C08K5/5398B60C1/00
CPCY02T10/86
Inventor 宫崎达也
Owner SUMITOMO RUBBER IND LTD
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