Rubber composition for tire

一种橡胶组合物、轮胎的技术，应用在特殊轮胎、轮胎零部件、运输和包装等方向，能够解决可能性变高等问题，达到初始粘接性和湿热粘接性优异的效果

Active Publication Date: 2017-08-18
BRIDGESTONE CORP
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, p-tert-octylphenol and p-nonylphenol are considered as candidate substances for SVHC specified in REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) in the EU region, and the use of these substances will be restricted in the EU region more likely

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Rubber composition for tire
  • Rubber composition for tire
  • Rubber composition for tire

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0134] [Preparation of Rubber Composition for Tires]

[0135] The rubber composition for tires of this embodiment can be obtained by mixing the aforementioned various components and additives using a kneader, for example, an open kneader such as a roller or a closed kneader such as a Banbury mixer. Machine to mix.

[0136] Specifically, the rubber composition for tires of this embodiment can be obtained by kneading the rubber component (A), zinc oxide (B) and cocondensate (C) in the first stage of kneading, and then They are produced by mixing them with vulcanizing agents and vulcanization accelerators.

[0137] In a stage preceding the final stage of kneading, a part or all of the vulcanization accelerator may be added and kneaded, and in the final stage of kneading, the vulcanization agent and the remaining vulcanization accelerator may be mixed to produce a composition. In this case, as a vulcanization accelerator to be added in a stage prior to the final stage of kneadin...

Embodiment

[0142] The present invention is described in more detail with reference to Examples and Comparative Examples given below, but the present invention is not limited thereto.

[0143] [Evaluation method of cocondensate]

[0144] The cocondensate was analyzed and its physical properties were evaluated as follows.

[0145] (a) Measurement of the average molecular weight of the cocondensate

[0146] The average molecular weight of the cocondensate was calculated by the gel permeation chromatography (GPC) used for analysis under the following conditions using the following equipment, and calculated the weight average molecular weight in terms of styrene.

[0147] Instrument used: HLC-8220GPC (manufactured by Tosoh Corporation)

[0148] Column: TSK Guard Column SUPER HZ-L (manufactured by Tosoh Corporation)

[0149] +TSK-GEL SUPER HZ1000(4.6mmφ×150mm)

[0150] +TSK-GEL SUPER HZ2500(4.6mmφ×150mm)

[0151] +TSK-GEL SUPER HZ4000(4.6mmφ×150mm)

[0152] Column temperature: 40°C

[0...

manufacture example 1

[0184] 97.3g (1.2mol) of formalin with a purity of 37%, 15.0g (0.10mol) of p-tert-butylphenol, 85.0g (0.50mol) of o-phenylphenol and 75.4g of toluene were sequentially added to the equipment equipped with reflux Four-neck split flask with condenser and thermometer. Next, this was heated to an internal temperature of 45° C., and 20 g (0.12 mol) of a 24% aqueous sodium hydroxide solution was added and stirred until the exotherm ceased. After confirming that the exotherm had ceased, this was heated to an internal temperature of 65° C. and kept at this temperature for 2 hours. This was then reheated to an internal temperature of 80° C. and held for a further 4 hours.

[0185] After the reaction, this was cooled to an internal temperature below 65° C., and neutralized with 49 g of water and 7.55 g (1.13 mol) of oxalic acid dihydrate added thereto, and then after adding 22.6 g of toluene, this was left as it was. Set aside, and remove the aqueous layer.

[0186] 62.7 g (0.57 mol)...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
specific surface areaaaaaaaaaaa
specific surface areaaaaaaaaaaa
Login to view more

Abstract

This rubber composition for a tire is obtained by blending a rubber component (A), zinc oxide (B), and a co-condensate (C) that has a softening point of 150 DEG C or less and that contains a p-tert-butylphenol-derived constituent unit represented by formula (1), an o-phenylphenol-derived constituent unit represented by formula (2), and a resorcinol-derived constituent unit represented by formula (3). The nitrogen adsorption specific surface area (N2SA) of the zinc oxide (B) according to the BET method is 6-110 m<2> / g. The blending amount of the zinc oxide (B) is 5-13 parts by mass with respect to 100 parts by mass of the rubber component (A). The blending amount of the co-condensate (C) is 0.1-10 parts by mass with respect to 100 parts by mass of the rubber component (A). The co-condensate (C) can be used as a replacement for p-tert-octylphenol and p-nonylphenol, has a softening point that is lower than the maximum temperature in a rubber processing step, and has excellent dispersibility in rubber.

Description

technical field [0001] The present invention relates to a rubber composition for tires using a cocondensate obtained from alkylphenol, resorcinol, and the like. Background technique [0002] Rubber products such as tires, conveyor belts, hoses, etc. are reinforced with reinforcing materials such as steel cords, organic fibers, etc. In these rubber products, it is required that the rubber and the reinforcing material are firmly bonded to each other. [0003] In order to bond rubber and reinforcing materials, there is a method of using an adhesive. As an example, there is known a method of compounding and kneading a binder together with other various compounding agents in the kneading step of the rubber processing step, wherein by mixing resorcinol with a compound such as p-tert-octylphenol Or the cocondensate obtained by reacting alkylphenol such as p-nonylphenol with formalin and further reacting the cocondensate obtained is used as a binder in the rubber processing step (...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L21/00B60C1/00C08G8/22C08K3/04C08K3/22C08L61/12
CPCB60C1/00C08K3/04C08K3/22C08K2003/2296C08K2201/006C08K2201/014C08L7/00C08L9/00C08L21/00C08L61/12C08G8/22
Inventor 山岸淳一武者信一金富芳彦
Owner BRIDGESTONE CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap