ISO 16365-3:2014 プラスチック—成形および押出成形用の熱可塑性ポリウレタン—パート3：エステル基含有量の測定によるエーテルポリウレタンとエステルポリウレタンの区別 | ページ 2

Foreword

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The committee responsible for this document is ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials.

ISO 16365 consists of the following parts, under the general title Plastics — Thermoplastic polyurethanes for moulding and extrusion:

• Part 1: Designation system and basis for specifications
• Part 2: Preparation of test specimens and determination of properties
• Part 3: Distinction between ether and ester polyurethanes by determination of the ester group content

Introduction

The saponification value is a fast and easy determination method to distinguish between polyesterol and polyetherol-based thermoplastic polyurethanes. However, the saponification value strongly depends on the reaction conditions. Higher saponification values result in longer hydroxylation times and/or higher temperatures. With this procedure, the theoretically expected values have been found.

1 Scope

This part of ISO 16365 specifies a method for the determination of esters including ester thermoplastic polyurethanes (TPU) and ether TPU for quality control without the necessity of sophisticated instrumentation and avoids or minimizes long-term microbial testing for TPU materials. The method described is used to distinguish major TPU types and characterize TPU mixtures.

The method is applicable to all linear polyurethanes based on 4,4’-diphenylmethane diisocyanate (MDI) and is intended for instance to minimize long-term tests related to microbe resistance and hydrolysis.

2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

Bibliography