Unlock instant, AI-driven research and patent intelligence for your innovation.

NBR composition

A composition and polymer technology, applied in mechanical equipment, transportation and packaging, other chemical processes, etc., can solve problems such as inability to meet physical properties, and achieve excellent oil resistance, cold resistance, and heat resistance.

Inactive Publication Date: 2014-12-24
NOK CORP
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the physical properties required together with heat resistance and cold resistance vary depending on the application of the NBR material, and not all physical properties can be satisfied, and the NBR material must be improved according to the application.

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
  • NBR composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057]

[0058] NBR polymer

[0059] ("NT4301" manufactured by JSR Corporation; AN content 23 wt%) 100 parts by weight

[0060] Filling material: silica

[0061] ("Nipsil E74-P" manufactured by Tosoh Silicon Chemical Co., Ltd.; primary particle size 80nm)

[0062] ··36 parts by weight

[0063] Plasticizer: ether ester plasticizer polyethylene glycol-di-2-ethylhexanoate

[0064] ("RS735" manufactured by Asahi Denka Co., Ltd.; weight average molecular weight MW850) 4 parts by weight

[0065] Cross-linking accelerator: tetrabenzylthiuram disulfide

[0066] (Sansera TBZTD manufactured by Mitsubishi Chemical Corporation) 1 part by weight

[0067] Peroxide crosslinking agent: dicumyl peroxide

[0068] (Percumy D manufactured by NOF Corporation) 4 parts by weight

[0069] For all the above raw materials except the crosslinking (vulcanizing) agent and crosslinking accelerator, perform kneading in a kneader, prepare a masterbatch at ...

Embodiment 2

[0085] In Example 1, the NBR polymer ("NT4301" manufactured by JSR Corporation; AN content 23%) was changed to an NBR polymer ("N250S" manufactured by JSR Corporation) with an AN content of 20%. The joint rubber samples were molded and evaluated in the same manner, and the results are shown in Table 1.

Embodiment 3

[0087] In Example 1, except that the NBR polymer ("NT4301" manufactured by JSR Corporation; AN content 23%) was changed to an NBR polymer ("N236H" manufactured by JSR Corporation) with an AN content of 32%, the same crossover The joint rubber samples were molded and evaluated in the same manner, and the results are shown in Table 1.

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
particle diameteraaaaaaaaaa
Login to View More

Abstract

The purpose of the present invention is to provide an NBR composition that has excellent cold resistance and heat resistance and can be used in a wide range of temperatures, the NBR composition also having excellent oil resistance without substantially decreasing the compression set properties. This objective is resolved by an NBR composition comprising an NBR polymer, silica, an ether ester-based plasticizer, and a cross-linking agent; the NBR composition being characterized by containing 10 to 150 parts by weight of the silica, for which the primary grain size of the silica is in the range of 50 nm or higher, and 3 to 20 parts by weight of the ether ester-based plasticizer, for which the weight-average molecular weight (MW) of the ether ester-based plasticizer is 500 or higher, in relation to 100 parts by weight of the NBR polymer, for which the acrylonitrile content of the NBR polymer is in the range of 20 to 40%.

Description

technical field [0001] The present invention relates to an NBR composition. Specifically, it relates to an NBR that can be used in a wide temperature range, has excellent cold resistance and heat resistance, does not substantially reduce compression set characteristics, and is excellent in oil resistance. combination. Background technique [0002] For materials of sealing parts such as gaskets, physical properties such as heat resistance, oil resistance, and cold resistance are sought according to the application, and NBR, HNBR, FKM, etc. are generally used. [0003] Among them, HNBR is obtained by hydrogenating the double bond of NBR, and although it is excellent in heat resistance, it is expensive. Therefore, it is necessary to use cheap NBR for parts that do not require heat resistance and use HNBR for parts that require heat resistance. However, from the viewpoint of reducing material costs, parts that require a certain degree of heat resistance are also Such requireme...

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): C08L9/02C08K3/36C08L71/02C09K3/10F16J15/10
CPCC08K3/36C08K5/10C08K5/103C08L9/02C08L71/02C09K3/10C09K2200/0612C08K5/0016C08K5/0025F16J15/10
Inventor 青柳彩子
Owner NOK CORP