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ISO/DIS 25307

Butadiene rubber (BR), raw — Quantitative test methods for cold flow

General information

Current stage: 40.60 Effective date: Nov 11, 2025

Originator: ISO

Owner: ISO/TC 45/SC 3

Type: International Standard

ICS: 83.040.10

Scope

This document specifies two methods for the determination of cold flow characteristics of raw polybutadiene rubber (BR):
— Method A is a stress relaxation method using the rotorless rheometer;
— Method B is a creep testing method using compression assembly.

Life cycle

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IN_DEVELOPMENT
ISO/DIS 25307
40.60 Close of voting
Nov 11, 2025