ISO 21627-2:2009

Name: ISO 21627-2:2009 — Plastics — Epoxy resins — Determination of chlorine content — Part 2: Easily saponifiable chlorine
SKU: ISO 21627-2:2009
Price: 25 EUR
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Plastics — Epoxy resins — Determination of chlorine content — Part 2: Easily saponifiable chlorine

Название (английский):

ISO 21627-2:2009

Plastics — Epoxy resins — Determination of chlorine content — Part 2: Easily saponifiable chlorine

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 6
Дата публикации:: 8 сентября 2009 г.
Издание:: ISO IS 21627 edition 2 version 1
ICS:: 83.080.10

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Описание (английский):

ISO 21627-2:2009 specifies a method for the determination of easily saponifiable chlorine in epoxy resins. The easily saponifiable chlorine content is the quantity of easily saponifiable chlorine in a given quantity of epoxy resin. The values obtained are indicative of the concentration of easily saponifiable chlorine in chlorohydrin groups in the resin.

Abstract

Overview

Key Topics

Scope and purpose: Determines the quantity of chlorine that is easily saponifiable in a given epoxy resin sample; indicative of chlorohydrin impurities.
Principle: Saponify organic chlorine with NaOH in 2‑butoxyethanol (epoxy resins) or in methanol at 50 °C (glycidyl esters). Acidify and measure resulting chloride ions by potentiometric titration with AgNO3.
Reagents and safety: Uses analytical‑grade reagents and grade 3 water (ISO 3696). Notable reagents include 2‑butoxyethanol and methanol (both carry toxicity warnings), NaOH solutions, acetone and standardized 0.01 mol/l AgNO3. Silver nitrate must be standardized against dried NaCl and stored protected from light.
Apparatus: Standard laboratory glassware plus a potentiometric titration setup with a silver/silver‑chloride electrode, analytical balance, water bath (50 °C), and magnetic stirring.
Procedure highlights: Typical test portions are selected to limit easily saponifiable chlorine in the aliquot; saponification is carried out for 2 h (a 30 min shorter time may be used for QC if validated), followed by addition of ketone and acetic acid and immediate potentiometric titration.
Results expression: Results are calculated from titration volumes, AgNO3 concentration and a correction for inorganic chlorine; values are reported in mg/kg and rounded to three significant figures.

Applications

Quality control: Routine monitoring of chlorohydrin impurities in epoxy resins to ensure consistent product performance and to detect incomplete dehydrohalogenation.
Process control: Evaluate effectiveness of dehydrohalogenation steps during resin manufacture.
Regulatory and material specification: Provide documented impurity data for material specifications, supplier qualification and compliance records.

Related Standards

ISO 21627-1: Inorganic (ionic) chlorine determination - required for the correction applied in this method.
ISO 21627-3: Total chlorine determination in epoxy resins.
ISO 4615: Analytical methods for other chlorine impurities in related resins.

Notes: The standard includes safety statements and detailed procedural parameters (reagent concentrations, volumes, times and temperatures). Interlaboratory precision data were not available at publication; users should follow the test report requirements and record any deviations from the prescribed procedure.

Технические детали

Технический комитет: ISO/TC 61/SC 12 - Thermosetting materials
SKU: ISO 21627-2:2009

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ISO 4615:1979

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Plastics — Unsaturated polyesters and epoxide resins — Determination of total chlorine content

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ISO 21627-2:2009

Abstract

Overview

Похожие стандарты

Key Topics

Applications

Related Standards

Технические детали

BS EN ISO 21627-1:2009

Plastics. Epoxy resins. Determination of chlorine content. Inorganic chlorine.

BS EN ISO 3696:1995

Water for analytical laboratory use. Specification and test methods.

BS EN ISO 21627-3:2009

Plastics. Epoxy resins. Determination of chlorine content. Total chlorine.

ISO 4615:1979

Plastics — Unsaturated polyesters and epoxide resins — Determination of total chlorine content