Dispersion liquid of chemical for rubbers, method for producing same, rubber wet master batch containing chemical for rubbers, rubber composition, and tire

A chemical and dispersion technology, applied in special tires, tire parts, transportation and packaging, etc., can solve the problem of large deviation of anti-aging agent content, lower Mooney viscosity, and the enlightenment of the method of high dispersion of rubber chemicals, etc. problem, to achieve good dispersion and improve the effect of heat aging resistance

Inactive Publication Date: 2012-04-11
BRIDGESTONE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, it is difficult to fully introduce the anti-aging agent into the wet master batch. As a result, within the same production batch, the deviation of the content of the anti-aging agent is large. In addition, when the master batch is placed in advance, the Mooney viscosity is likely to be reduced and cannot be called a method that will necessarily be fully satisfactory
[0007] As stated above, in the prior art related to wet masterbatches, there is no suggestion of a method for highly dispersing rubber chemicals in wet masterbatches

Method used

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  • Dispersion liquid of chemical for rubbers, method for producing same, rubber wet master batch containing chemical for rubbers, rubber composition, and tire

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0131] Example 1 Preparation of white turbid dispersion liquid containing antioxidant 6C and preparation of wet rubber masterbatch

[0132] (1) Preparation of white turbid dispersion containing antioxidant 6C

[0133] The antioxidant 6C (N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine) ["Ozonone 6C" manufactured by Seiko Chemical Co., Ltd.] is dissolved in ethanol as a good solvent , Prepare a 6C solution with a concentration of 10% by mass. Next, the same amount of water as a poor solvent was added to the 6C solution while stirring, and the mixture was stirred at 25°C for 10 minutes to prepare a 6C-containing white turbid dispersion liquid with a 6C concentration of 5 mass%.

[0134] In this white turbid dispersion liquid containing 6C, 96% by mass of all 6C was dispersed as particles, and the average particle diameter (mv) of the particles was 1.7 μm.

[0135] (2) Production of wet masterbatch

[0136] The natural rubber latex with a rubber concentration of 20% by mass and the wh...

Embodiment 2

[0141] Example 2 Preparation of white turbid dispersion liquid containing antioxidant RD and preparation of wet rubber masterbatch

[0142] (1) Preparation of white turbid dispersion containing antioxidant RD

[0143] Except in Example 1(1), the antioxidant RD (2,2,4-trimethyl-1,2-dihydroquinoline polymer) ["Nonflex RD" manufactured by Seiko Chemical Co., Ltd.] is used instead of the antioxidant Except for the agent 6C, it was carried out in the same manner as in Example 1 (1) to prepare an RD-containing white turbid dispersion liquid having an RD concentration of 5% by mass.

[0144] In this white turbid dispersion liquid containing RD, 93% by mass of the total RD was dispersed as particles, and the average particle diameter (mv) of the particles was 0.9 μm.

[0145] (2) Production of wet masterbatch

[0146] Using a natural rubber latex with a rubber concentration of 20% by mass and the RD-containing white turbid dispersion liquid with an RD concentration of 5% by mass obtained in (1...

Embodiment 3

[0151] Example 3 Preparation of white turbid dispersion containing phenolic resin and preparation of wet rubber masterbatch

[0152] (1) Preparation of white turbid dispersion containing phenolic resin

[0153] Except that phenol resin [SP1006N" manufactured by Asahi Organic Materials Co., Ltd.] was used in Example 1 (1) instead of the antioxidant 6C, the same procedure as in Example 1 (1) was carried out to prepare a phenol resin with a concentration of 5% by mass. White turbid dispersion containing phenolic resin.

[0154] In this white turbid dispersion liquid containing the phenol resin, 92% by mass of the total phenol resin was dispersed as particles, and the average particle diameter (mv) of the particles was 2.1 μm.

[0155] (2) Production of wet masterbatch

[0156] The natural rubber latex with a rubber concentration of 20% by mass and the phenolic resin-containing white turbid dispersion with a phenolic resin concentration of 5% by mass obtained in (1) above are used so that ...

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Abstract

Disclosed are: a white turbid dispersion liquid of a chemical for rubbers, which contains the chemical for rubbers at a concentration of not less than 1% by mass; a method for producing the white turbid dispersion liquid of a chemical for rubbers, wherein a solution, which is obtained by dissolving a chemical for rubbers into a good solvent for the chemical for rubbers, is mixed with a poor solvent for the chemical for rubbers; and a wet master batch containing a chemical for rubbers, which is obtained by solidifying a liquid mixture of the white turbid dispersion liquid of a chemical for rubbers and a rubber latex with or without a filler slurry. The dispersion liquid of a chemical for rubbers is used for the purpose of having a rubber wet master batch contain various chemicals for rubbers with high dispersibility, and the method enables the production of the dispersion liquid of a chemical for rubbers. The rubber wet master batch provides a rubber composition that has improved thermal aging resistance, reinforcing properties, elastic modulus, wear resistance and the like.

Description

Technical field [0001] The present invention relates to a white turbid rubber chemical dispersion, a method for producing the same, a wet masterbatch containing a chemical for rubber using the dispersion, a rubber composition and a tire formed using the wet masterbatch. More specifically, the present invention relates to a rubber chemical dispersion liquid used to make various rubber chemicals to be contained in a rubber wet masterbatch with good dispersibility, an effective manufacturing method thereof, and improved Rubber wet-process masterbatch containing chemicals for rubber of a rubber composition with heat aging resistance, reinforcement, elastic modulus, abrasion resistance, etc., and a rubber wet-process masterbatch formed by using the rubber wet-process masterbatch having the above-mentioned properties Rubber composition and tires using the same. Background technique [0002] It is generally known to add an anti-aging agent in order to prevent deterioration of the wet m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00C08J3/20C08K5/00B60C1/00
CPCB60C1/00C08K5/005C08J3/22C08J2421/02C08J3/226C08L91/06C08K5/09C08L21/00
Inventor 中山敦笠井豪泉池正明西浦史晃
Owner BRIDGESTONE CORP
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