ISO/DIS 4658

Acrylonitrile-butadiene rubber (NBR) — Evaluation procedure

General information

Current stage: 40.20 Effective date: Apr 1, 2026

Originator: ISO

Owner: ISO/TC 45/SC 3

Type: International Standard

Scope

This document specifies, for acrylonitrile-butadiene rubbers (NBRs):
— physical and chemical tests on raw rubbers;
— standard materials, a standard test formulation, equipment and processing methods for evaluating the vulcanization characteristics.
The mixing preferred method is the single stage mixing with LIM (laboratory internal mixer).

Life cycle

PREVIOUSLY

PUBLISHED
ISO 4658:2020

NOW

IN_DEVELOPMENT
ISO/DIS 4658
40.20 DIS ballot initiated: 12 weeks
Apr 1, 2026

Preview

Only informative sections of projects are publicly available. To view the full content, you will need to create an account. If you are a member, please log in to your account by clicking on the "Log in" button.