ISO 10398-1998 PDF

Full title and description

ISO 10398:1998 — Rubber — Identification of accelerators in cured and uncured compounds. The standard specifies analytical procedures for separating and identifying common classes of vulcanization accelerators found in rubber compounds.

Abstract

ISO 10398 describes laboratory methods (principally thin‑layer chromatography (TLC) and gas chromatography (GC) techniques, with specified sample preparation and reagents) to separate and identify accelerator classes such as thiazoles, sulfenamides, thiurams and dithiocarbamates, guanidines and dithiodimorpholine in both unvulcanized and vulcanized rubber. The standard also documents known limitations (for example, some accelerators can interconvert during vulcanization, making exact source identification ambiguous).

General information

• Status: Published (confirmed active on ISO review).
• Publication date: 2 July 1998 (1998-07).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 83.060 (Rubber).
• Edition / version: Edition 1 (1998).
• Number of pages: 11 (published document).

Scope

The standard specifies methods using gas chromatography and thin‑layer chromatography (with defined sample‑preparation procedures, solvents and spray reagents) for separation and identification of the following classes of accelerators in vulcanized and unvulcanized compounds: thiazoles, sulfenamides, thiurams and dithiocarbamates, guanidines and dithiodimorpholine. It also states method limitations (for example, some species may be generated or transformed during vulcanization and some classes cannot be unambiguously distinguished from each other by the procedures given).

Key topics and requirements

• Analytical techniques: specified TLC procedures (plates, eluents, spray reagents) and GC methods for volatile/derivatizable components.
• Target accelerator classes: thiazoles, sulfenamides, thiurams, dithiocarbamates, guanidines and dithiodimorpholine.
• Sample preparation: milling/sizing, solvent extraction or reflux steps, pH adjustments and concentration/distillation steps to recover amines/accelerator fractions.
• Interpretation limits: notes on interconversion (e.g., MBT/MBTS/sulfenamides) and inability in some cases to distinguish derivatives produced during vulcanization.
• Matrix considerations: separation from unvulcanized compounds is easier than from vulcanized matrices (solvent penetration into cured rubber is limited).
• Safety and laboratory practice: users are expected to follow normal laboratory safety precautions when applying the methods.

Typical use and users

Quality control and analytical laboratories in the rubber and elastomer industry, R&D groups formulating rubber compounds, suppliers of compounding ingredients, and regulatory or materials‑testing organizations use this standard to identify what classes of accelerators are present in a compound and to assist in troubleshooting formulation or regulatory questions (e.g., presence/absence of specific accelerator types).

Related standards

Standards related to chemical analysis and rubber testing include ISO documents on antidegradants and other compounding ingredients and methods (examples: ISO 10638 on antidegradants by GC/MS, various ISO test methods for rubber compounding ingredients and sample preparation). ISO/TC 45 (rubber and rubber products) is the technical committee responsible for related work.

Keywords

rubber; accelerators; vulcanization; thiazoles; sulfenamides; thiurams; dithiocarbamates; guanidines; dithiodimorpholine; thin‑layer chromatography (TLC); gas chromatography (GC); analytical methods; ISO 10398.

FAQ

Q: What is this standard?

A: ISO 10398:1998 is an ISO international standard that specifies laboratory procedures for the identification of chemical accelerators used in rubber compounds (both cured and uncured).

Q: What does it cover?

A: It covers TLC and GC‑based separation and identification methods for specific classes of accelerators (thiazoles, sulfenamides, thiurams/dithiocarbamates, guanidines, dithiodimorpholine), sample preparation steps and known interpretation limits (e.g., transformation of some accelerators during vulcanization).

Q: Who typically uses it?

A: Analytical and QC laboratories in the rubber industry, formulators, ingredient suppliers and regulatory/testing bodies use the standard to determine which accelerator classes are present in rubber compounds and to support quality or compliance investigations.

Q: Is it current or superseded?

A: The document was published in July 1998 (Edition 1). The ISO record shows it as published and has been periodically reviewed/confirmed; as of the most recent ISO review record it is listed as confirmed (i.e., the 1998 edition remains the current published edition). Users should check with their national/ISO sales bodies for any amendments or later replacements before relying on the standard for regulatory decisions.

Q: Is it part of a series?

A: It is one of several ISO test methods and product‑related standards developed under ISO/TC 45 addressing chemical analysis and testing of rubber compounding ingredients; it is complementary to other ISO methods for antidegradants and compounding ingredient testing.

Q: What are the key keywords?

A: Accelerators, vulcanization, thiazoles, sulfenamides, thiurams, dithiocarbamates, guanidines, chromatographic identification, TLC, GC, rubber testing, ISO 10398.