NBR composition for rubber laminated metal

Patent metadata

Field	Value
Publication number	US-11780993-B2
Application number	US-201816764514-A
Country	US
Kind code	B2
Filing date	Oct 16, 2018
Priority date	Nov 24, 2017
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

An NBR composition for rubber laminated metal having 1 to 3 parts by weight of sulfur and 1 to 15 parts by weight of a disulfide compound such as 4,4′-dithiodimorpholine or dithiodicaprolactam represented by the general formula RN—S—S—NR (wherein RN is a cyclic linking group formed together with the N atom bonded to the S atom), based on 100 parts by weight of NBR. The rubber composition that can improve the protrusion properties of a rubber layer when used for, for example, a gasket or a brake shim material that is a laminated composite metal laminated with another metal plate.

First claim

The invention claimed is:

1. A brake shim material, comprising:
a vulcanizate layer of NBR composition laminated with a first metal plate and another metal plate;
wherein the NBR composition comprises:
1 to 3 parts by weight of sulfur and
1 to 15 parts by weight of 4,4′-dithiodimorpholine or dithiodicaprolactam, based on 100 parts by weight of the NBR.

2. The brake shim material according to claim 1 ,
wherein the NBR composition further comprises 15 parts by weight or less of other sulfur-containing vulcanization accelerators.

Assignees

• Nok Corp

Inventors

• Watanabe Isao
• TAKEKAWA Daiki

Classifications

• C08L9/02 Primary

  Copolymers with acrylonitrile · CPC title

• B32B15/06

  of {natural rubber or synthetic} rubber · CPC title

• B32B25/14

  comprising {synthetic rubber copolymers (B32B25/18 and B32B25/20 take precedence)} · CPC title

• C08K5/44

  Sulfenamides · CPC title

• C09K3/10

  {Materials in mouldable or extrudable form} for sealing or packing joints or covers (filling pastes C09D5/34) · CPC title