ISO 4764:2024 プラスチック — ポリウレタンの製造に使用されるポリオール — ヨウ素法を使用した不飽和度の測定 | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials.

Introduction

Conventionally, a titration method using mercuric acetate (see ISO 17710) has been used as a method for measuring a polyether polyol for polyurethanes. However, in recent years, the treatment of mercury waste liquid associated with analysis has become a global problem.

This document formulates a measurement method to replace the mercuric acetate method.

1 Scope

This document specifies a method for quantifying the total unsaturation using an addition reaction of the interhalogen compound iodine monochloride (ICl), using glacial acetic acid as a solvent as a method for measuring the total unsaturation of a polyether polyol for polyurethanes. It is not applicable to unsaturated compounds that are conjugated with a carbonyl group, a carboxyl group, or a nitrile group.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. 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 terms and definitions given in ISO 472 apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography