Elastomer Composition, Method for Producing Same, and Pneumatic Tire Using Same

a technology of elastomer composition and composition, which is applied in the direction of tyre parts, vehicle components, special tyres, etc., can solve the problems of thermal plastic resin, limited amount of rubber which could be compounded, and inability to shape, etc., to achieve low gas permeability and high dynamic durability

Inactive Publication Date: 2008-12-25
THE YOKOHAMA RUBBER CO LTD
View PDF2 Cites 23 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0003]Accordingly, an object of the present invention is to provide an elastomer composition (C) having a flexible and low temperature durability comprising a matrix of a relatively small amount of a thermoplastic resin (A), in which a relatively large amount of an elastomer component (B) is finely dispersed, a method for producing the same and a pneumatic tire using the same.

Problems solved by technology

However, when a large amount of rubber is compounded, the thermoplastic resin serving as the continuous phase and the elastomer component serving as the dispersed phase invert in phase, and, therefore, the thermoplastic elastomer composition thus prepared does not exhibit the fluidity of the thermoplastic resin and the shaping becomes impossible.
Therefore, there have been limits to the amount of rubber which could be compounded.

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

Examples

Experimental program
Comparison scheme
Effect test

examples

[0030]Examples will now be used to further illustrate the present invention, but the present invention is by no means limited in scope by these Examples.

example 8

[0032]In the formulation shown in Table I, the elastomer and the cross-linking agent were mixed in an internal-type Banbury mixer (made by Kobe Steel Corporation) at 100° C. for 2 minutes to prepare an elastomer composition, which was then pelletized by a rubber pelletizer (Moriyama Manufacturing Co., Ltd.). Into the resin pellets, a plasticizer for resin (butyl benzene sulfonamide BM-4 made by Daihachi Chemical Industry Co., Ltd.) was added to about 30% by weight, based upon the weight of the resin and kneaded by a twin-screw kneader (made by Japan Steel Works), then the plasticizer-containing resin obtained and the elastomer pellets were kneaded again by a twin-screw-type kneader (made by Japan Steel Works) to prepare pellets of a plasticizer-containing elastomer composition, which was (dynamically vulcanized. The pellets prepared were formed into a sheet by a T-die molding machine, which was then dried in a vacuum oven at 180° C. for 30 hours to evaporate off the plasticizer, whe...

example 9

[0033]In the formulation shown in Table I, the elastomer and the cross-linking agent were mixed in an internal-type Banbury mixer (made by Kobe Steel Corporation) at 100° C. for 2 minutes to prepare an elastomer composition, which was the pelletized by a rubber pelletizer (Moriyama Manufacturing Co., Ltd.). Into the resin pellets, a plasticizer for resin (butyl benzene sulfonamide BM-4 made by Daihachi Chemical Industry Co., Ltd.) was added to about 30% by weight, based upon the weight of the resin and kneaded by a twin-screw kneader (made by Japan Steel Works), then the plasticizer-containing resin obtained and the elastomer pellets were kneaded again by a twin-screw kneader (made by Japan Steel Works) to prepare pellets of a plasticizer-containing elastomer composition, which was dynamically vulcanized. The pellets prepared were formed into a sheet by a T-die molding machine, which was then sandwiched between 2 mm sheets of a rubber compound having the following composition and th...

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
volume ratiosaaaaaaaaaa
volume ratioaaaaaaaaaa
melt viscosityaaaaaaaaaa
Login to view more

Abstract

An elastomer composition, having an excellent flexibility and low temperature durability, a method for producing the same and a pneumatic tire using the same are provided.An elastomer composition (C) comprising a matrix of a thermoplastic resin (A), in which a dispersed phase of an elastomer component (B) is finely dispersed to form an island-in-sea structure, wherein volume ratios of the thermoplastic resin (A) and the elastomer component (B) satisfy the following formula (I):Φd / Φm>ηd / ηm  (I)wherein Φd and ηd, respectively, indicate a volume ratio and a melt viscosity of the elastomer component (B), and Φm and ηm, respectively, indicate a volume ratio and a melt viscosity of the thermoplastic resin (A)), a method for producing the same and a pneumatic tire using the same.

Description

TECHNICAL FIELD[0001]The present invention relates to an elastomer composition, a method for producing the same and a pneumatic tire using the same. More specifically, it relates to an elastomer composition having an excellent flexibility and low temperature durability, while maintaining the characteristics of the resin, a method for producing the same and a pneumatic tire using the same.BACKGROUND ART[0002]A thermoplastic elastomer composition comprising a matrix (i.e., a continuous phase) of a thermoplastic resin, in which a rubber is finely dispersed (i.e., a dispersed phase) is known. It is known in the art that an island-in-sea structure, in which the rubber is surrounded with the resin, is formed under the conditions satisfying the formula (IV) explained later (e.g., see Japanese Patent Publication (A) No. 2000-159936). To obtain a rubbery elastomer from a composition obtained in a state where a thermoplastic resin forms a matrix, it is necessary to increase the amount of rubb...

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(United States)
IPC IPC(8): B60C5/14C08L19/00
CPCB60C1/0008C08J3/005C08K3/22C08K5/0016C08K5/0025C08K5/09C08L2205/22C08L21/00C08L23/22C08L23/283C08L77/00C08L77/02C08L77/06C08L9/00C08L2666/14C08L2666/08C08L2666/04C08L9/06
Inventor HARA, YUICHI
Owner THE YOKOHAMA RUBBER CO LTD
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