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Silica treated with silane coupling agent and rubber composition containing same

A technology of silane coupling agent and rubber composition, which is applied in the treatment of silica, silicon oxide, and dyed organosilicon compounds, etc., and can solve the problems of wear resistance, reduced handling stability, coagulation, and increased viscosity of rubber compositions, etc. question

Inactive Publication Date: 2006-12-20
YOKOHAMA RUBBER CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in such pretreated silica, if the amount of the silane coupling agent used in the pretreatment is increased, the reaction between the silane coupling agents will still cause silica aggregation and increase the viscosity of the rubber composition. The problem
[0003] However, in order to ensure the performance on ice such as drivability, braking performance, and handling stability of studless tires on ice and snow roads, conventionally, from the viewpoint of improving the quality of rubber, it has been carried out by the following methods even at low temperatures Improvement of the quality of rubber that is also difficult to harden by adding a polymer such as butadiene rubber with a low glass transition temperature to a rubber composition containing natural rubber, or by increasing the amount of a softener, Or by adding silica-based fillers, short fibers, porous substances, etc., but due to the reduction in wear resistance, handling stability, etc., only the improvement of the low-temperature characteristics of rubber cannot meet people's requirements.

Method used

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  • Silica treated with silane coupling agent and rubber composition containing same
  • Silica treated with silane coupling agent and rubber composition containing same
  • Silica treated with silane coupling agent and rubber composition containing same

Examples

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Embodiment

[0031] Hereinafter, the present invention will be further described through examples, but it is not meant that the scope of the present invention is limited to these examples.

[0032] Standard example 1, embodiment 1~5 and comparative example 1~4

[0033] sample preparation

[0034] In the compounding shown in Table I, the components other than the vulcanization accelerator and sulfur were kneaded in a 3-liter internal mixer for 5 minutes, and released when the temperature reached 165±5°C to obtain a masterbatch. A vulcanization accelerator and sulfur were kneaded into this master batch in an open roll to obtain a rubber composition. Using this rubber composition, the unvulcanized property was evaluated by the following test method. The results are shown in Table I.

[0035] Next, the obtained rubber composition was vulcanized at 160° C. for 30 minutes in a mold of 15×15×0.2 cm to prepare a vulcanized rubber sheet, and the physical properties of the vulcanized rubber were ...

Embodiment 6

[0080] Example 6: 30g of 3-octanoylthiopropyltriethoxysilane (NXT silane) is slowly added to 300g of Nipsil AQ (Nippon Sirika Industry) stirred by a Henschel mixer to prepare a dry formula Surface treated silica particles. The silane coupling agent surface-treated silica particles were dried for 1 hour in an explosion-proof oven set at 150°C. The range of the bulk density retention was measured by the same method as Standard Example 2, and it was confirmed to be 95% to 98%. (handling method 2)

Embodiment 7

[0081] Example 7: Treatment The same treatment as in Example 6 was performed except that the silane coupling agent surface-treated silica particles in Example 6 were not dried in an explosion-proof furnace. The range of the bulk density retention was measured by the same method as Standard Example 2, and it was confirmed to be 96 to 99%. (treatment method 3) standard example 3, embodiment 8~12 and comparative example 6~9

[0082] sample preparation

[0083] In the formulation shown in Table III, the components other than the vulcanization accelerator and sulfur were kneaded in a 3-liter internal mixer for 5 minutes, and released when the temperature reached 165±5° C. to obtain a masterbatch. A vulcanization accelerator and sulfur were kneaded into this master batch in an open drum to obtain a rubber composition. Using this rubber composition, the unvulcanized property was evaluated by the test method described above. The results are shown in Table III.

[0084] Next, the o...

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Abstract

Disclosed is a surface-treated silica whose surface is treated in advance with at least one silane coupling agent X represented by the following formula (I): (wherein Y independently represents a methoxy, ethoxy, propoxy, isopropoxy, butoxy, isobutoxy or acetoxy group; R represents a C1-C18 hydrocarbon group selected from a straight chain, cyclic or branched alkyl groups, alkenyl groups, aryl groups and aralkyl groups). Also disclosed is a rubber composition comprising such a surface-treated silica and 100 parts by weight of a rubber component containing at least one diene rubber.

Description

technical field [0001] The present invention relates to a silane coupling agent treated silica and a rubber composition containing it, in particular to a silane coupling agent (or organosilane compound) surface treated silica, which is compounded with silica In the rubber composition, without impairing the reinforcement, it can suppress the reaction that the silane coupling agent participates in when compounding, improve the dispersion of silica, improve the wear resistance, wet slip performance, etc., and also involve the inclusion of the surface treatment two Silicon oxide rubber composition. Background technique [0002] In recent years, the compounding of silica has become mainstream in tread compound rubber for passenger car tires in order to reduce tire fuel consumption and improve wet skid performance. In such a silica-containing rubber composition, in order to improve reinforcement and processability, a silane coupling agent having an alkoxysilyl group that chemical...

Claims

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Application Information

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IPC IPC(8): C01B33/18C08L9/00C08K9/06C09C1/30C09C3/12
Inventor 三原谕龟田庆宽野村泰生高桥进
Owner YOKOHAMA RUBBER CO LTD
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