ISO 14900:2023 塑料 用于聚氨酯生产的多元醇 羟值的测定

标准编号：ISO 14900:2023

中文名称：塑料 用于聚氨酯生产的多元醇 羟值的测定

英文名称：Plastics — Polyols for use in the production of polyurethanes — Determination of hydroxyl number

发布日期：2023-12

标准范围

本文件规定了测定用作聚氨酯原料的多元醇的羟基数的两种方法。确定多元醇的羟基含量以适当配制聚氨酯体系。方法A主要适用于易于酯化的聚醚多元醇。它还用于具有显著空间位阻的多元醇，例如基于糖的多元醇。方法B旨在用于聚醚多元醇、聚合物多元醇和胺引发的多元醇，但对于空间位阻多元醇可得到低结果。如果采取预防措施以验证适用性，则可以通过这些方法分析其他多元醇。这些方法可用于研究以及质量控制和规格目的。

This document specifies two methods for the measurement of the hydroxyl number of polyols used as polyurethane raw materials.

The hydroxyl content of polyols are determined to properly formulate polyurethane systems. Method A is primarily applicable to readily esterified polyether polyols. It is also intended for polyols which have significant steric hindrance, such as those based on sugars. Method B is intended for polyether polyols, polymer polyols and amine-initiated polyols, but can give low results for sterically hindered polyols. Other polyols can be analysed by these methods if precautions are taken to verify applicability. These methods can be used for research and for quality control and specification purposes.

标准预览图