Starch composite and rubber composite including same

A technology of rubber composition and composite body, which is applied in the field of composite body and rubber composition containing it, can solve the problems of insufficient wear resistance of tires, hinder sulfur vulcanization, etc., and achieve excellent wear resistance, Suppression load, low excellent effect

Inactive Publication Date: 2009-07-08
SUMITOMO RUBBER IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, these substances have problems of hindering vulcanization with sulfur, or having poor dispersibility in rubber, so various improvements have been made to sugars or starches used in rubber compositions for tires
[0004] For example, in Patent Document 1, a compound in which starch and a plasticizer are mixed is disclosed, but even if the compound is used to manufacture a tire, there is a problem that the wear resistance of the tire is insufficient.
[0005] In this way, the starch contained in the rubber composition for tires that can improve the low fuel consumption, wet grip performance and wear resistance of the tire in a balanced manner has not been obtained so far.

Method used

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  • Starch composite and rubber composite including same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～3 and comparative example 1～3

[0065] (viscoelasticity test)

[0066] Using a viscoelasticity spectrometer manufactured by Iwamoto Seisakusho Co., Ltd., the loss tangent tanδ of the rubber sheet used for the test at 70°C was measured under the conditions of a frequency of 10 Hz, an initial deformation value of 10%, and a dynamic deformation value of 2%. and the determination of the loss tangent tanδ at 0 °C.

[0067] The smaller the value of tan δ at 70° C., the smaller the rolling resistance of the tire made of the rubber sheet, indicating excellent fuel efficiency. If the value of tan δ at 70° C. is 0.12 or less, it indicates that the low fuel consumption property is good.

[0068] Furthermore, a larger value of tan δ at 0° C. indicates that a tire made of the rubber sheet has excellent wet grip performance. If the value of tan δ at 0°C is 0.37 or more, it indicates good wet grip performance.

[0069] (LAMBOURN abrasion test)

[0070] Using the LAMBOURN abrasion tester manufactured by Iwamoto Seisakus...

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Abstract

The present invention provides a starch composite capable of improving fuel economy, wet grip performance, and abrasion resistance in a balanced manner, which can be blended into a rubber composition for tires, and a rubber composition blended with the starch composite. The starch complex contains starch and / or starch derivatives, water, plasticizer and clay; the rubber composition contains 5 to 30 parts by weight of the starch complex, nitrogen adsorption 20-70 parts by weight of silicon dioxide with a specific surface area of ​​100-500 m2 / g, and an organic silane coupling agent.

Description

technical field [0001] The present invention relates to a starch complex and a rubber composition containing the same. Background technique [0002] In the past, by reducing the rolling resistance of the tire to reduce the fuel consumption of the car (to improve the low fuel consumption of the tire), and to improve the wet grip performance and wear resistance of the tire, starch was added to the rubber composition for the tire. or sugars. [0003] However, these substances have problems of hindering vulcanization with sulfur or having poor dispersibility in rubber, so various improvements have been made on sugars or starches used in rubber compositions for tires. [0004] For example, Patent Document 1 discloses a composite in which starch and a plasticizer are mixed, but even if a tire is produced using this composite, there is a problem that the wear resistance of the tire is insufficient. [0005] Thus, starch contained in rubber compositions for tires capable of improv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L3/02C08L9/00C08K3/00
Inventor 寺川克美
Owner SUMITOMO RUBBER IND LTD
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