Fluorine rubber composition and bladder for tire production

一种氟橡胶、组合物的技术，应用在胎、应用、中空物品等方向，达到有利机械特性的效果

Active Publication Date: 2013-09-11
BRIDGESTONE CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, all these proposals are related to the improvement of the composition material, such as the improvement of the kind of fluororubber and the combination with other rubber or the improvement of the compounding agent, etc., and it is difficult to make both high tensile strength and high elongation at break compatible with each other. Allow

Method used

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  • Fluorine rubber composition and bladder for tire production
  • Fluorine rubber composition and bladder for tire production
  • Fluorine rubber composition and bladder for tire production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0095] Hereinafter, the present invention will be described in more detail with reference to the following examples, but it should be understood that the present invention is not limited thereto at all.

[0096] The characteristics were measured according to the following methods.

[0097] (1) Elongation at break (%) and tensile strength (MPa):

[0098] Measurement was performed at 25°C and 160°C according to JIS K6251:2004. Regarding the samples, a dumbbell-shaped No. 3 shape was used with respect to the results shown in Table 1, and a dumbbell-shaped No. 6 shape was used with respect to the results shown in Table 2 (thickness of the parallel portion of each dumbbell: 2 mm) .

[0099] (2) Tear strength (N / mm):

[0100] Measurement was performed at 23°C and 160°C according to JIS K6252:2001. As for the sample, an unnotched angle shape (thickness: 2 mm) was used.

[0101] (3) Fatigue resistance:

[0102] A De Mattia flex-cracking test was performed according to JIS K6260:...

Embodiment A1-A2 and comparative example A1-A6

[0104] (Manufacture of fluororubber composition)

[0105] According to each compounding shown in Table 1, the kneading step (A) of kneading the components excluding the co-crosslinking agent and the organic peroxide with the fluororubber and carbon black was carried out under the conditions shown in the table, And when the kneading temperature reaches the maximum temperature T m , the kneaded material was discharged to obtain a masterbatch (mixture). In addition, as a kneader, an internal mixer with a kneading capacity of 1 liter (DS1-5MHB-E model kneader, manufactured by Moriyama Company Ltd.) was used; and as a type of roll, a 10-inch roll ( Manufactured by Sakurai Roll K.K.).

[0106] After undergoing an aging step in which the masterbatch obtained in the kneading step (A) was left at room temperature (23° C.) for 12 hours, the co-crosslinking agent and organic peroxide shown in Table 1 were added to the aforementioned masterbatch material, and the contents were kneaded ...

Embodiment B1-B7 and comparative example B1-B4

[0121] (Manufacture of fluororubber composition)

[0122] According to each compounding shown in Table 2, the kneading step (A) of kneading the components excluding the co-crosslinking agent and the organic peroxide with the fluororubber and carbon black was carried out under the conditions shown in the table, And when the kneading temperature reaches the maximum temperature T m , the kneaded material was discharged to obtain a masterbatch (mixture). In addition, a 0.5-liter internal type mixer (MIX-LABO, manufactured by Moriyama Company Ltd.) and a 35-liter internal type mixer (manufactured by Toshin Co., Ltd.) were used as the mixing type kneader, and using An 8-inch roll (manufactured by Kansai Roll Co., Ltd.) and a 22-inch roll (manufactured by Kobe Kikai K.K.) were used as the roll type.

[0123] After undergoing an aging step in which the masterbatch obtained in the kneading step (A) was left at room temperature (23° C.) for 12 hours, the co-crosslinking agent and orga...

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Abstract

Provided is a fluorine rubber composition containing carbon black and a rubber component that contains fluorine rubber, wherein the carbon black has a nitrogen adsorption specific surface area (N2SA) of 25-180 m2 / g (inclusive) and a dibutyl phthalate (DBP) absorption of 60-180 ml / 100 g (inclusive). In a kneading step (A) wherein the carbon black is blended into the rubber component, the average shear rate on the rotor surface of the kneading machine is 100 (1 / second) or higher and the maximum kneading temperature (Tm) is 120-200 DEG C (inclusive). Consequently, the fluorine rubber composition has achieved a good balance between high tensile strength and high elongation at break after vulcanization, while obtaining good mechanical characteristics even in high temperature environments. Also provided is a bladder for tire production, which is produced using the fluorine rubber composition.

Description

technical field [0001] The present invention relates to a fluororubber composition having excellent mechanical properties after vulcanization; and a tire manufacturing bladder manufactured using the same. Background technique [0002] In recent years, fluororubbers are industrially used in a wide range of fields centering on the automobile and machine industries because they give rubber compositions excellent in heat resistance, chemical resistance, and the like. [0003] However, it may not be said that their mechanical properties are sufficient, and their application to fields requiring high mechanical strength is limited. [0004] In contrast, Patent Document 1 proposes a combination of fluororubber and epichlorohydrin rubber; Patent Document 2 discloses a fluororubber vulcanization composition containing (A) a compound consisting of vinylidene fluoride units and at least one fluorine-containing monomer and comprising iodine or bromine fluoroelastomer copolymers having i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12B29D22/00C08K3/04C08K5/14C08K5/17C08K5/3492
CPCB29D22/02B29D30/0654B29D2030/665C08K5/0025C08K3/04C08L27/16C08L15/02
Inventor 矢野雅士太田大助奥津修一
Owner BRIDGESTONE CORP
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