SIST EN ISO 21627-2:2009 PDF

Name: SIST EN ISO 21627-2:2009 — Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable chlorine (ISO 21627-2:2009)
SKU: SIST EN ISO 21627-2:2009
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Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable chlorine (ISO 21627-2:2009)

Название (английский):

SIST EN ISO 21627-2:2009

Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable chlorine (ISO 21627-2:2009)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 20 ноября 2009 г.
ICS:: 83.080.10
Технический комитет:: IPMA - Polimer materials and products

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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

Похожие стандарты

Стандарты, упомянутые в описании

Overview

EN ISO 21627-2:2009 - Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable chlorine is a CEN-adopted ISO method for quantifying the easily saponifiable chlorine fraction in epoxy resins. The measured value indicates the concentration of chlorine present mainly as chlorohydrin (1,2-chlorohydrin) impurities formed during epoxy resin manufacture from epichlorohydrin. Results support quality control and compliance testing for resin producers, test laboratories and downstream formulators.

Key topics and technical requirements

Scope and purpose: Specifies a chemical method to determine easily saponifiable chlorine in epoxy resins; values are indicative of chlorohydrin content.

Principle: Saponification of organic chlorides with NaOH in an appropriate solvent, followed by acidification and potentiometric titration of liberated chloride ions with standardized silver nitrate (0.01 mol/L). A correction for inorganic (ionic) chlorine is made using ISO 21627-1.

Reagents and solvents: Includes 2‑butoxyethanol, methanol (for glycidyl esters), glacial acetic acid, 2‑butanone, acetone, and a 120 g/L NaOH solution (prepared in 2‑butoxyethanol or methanol depending on sample type).

Apparatus: Standard lab glassware plus potentiometric titration equipment with a silver/silver‑chloride electrode, analytical balance (0.1 mg), water bath (50 °C for glycidyl esters), reflux condenser and magnetic stirrer.

Procedure highlights:

Dissolve an accurately weighed test portion.
React with NaOH at room temperature (2 h) in 2‑butoxyethanol (or at 50 °C in methanol for glycidyl esters).
Acidify, extract/dilute, then titrate potentiometrically with AgNO3.
Run blank and correct for inorganic chlorine per ISO 21627-1.
For QC, a validated shorter saponification time (30 min) may be used and must be reported.

Analytical quality: Standardization of silver nitrate, blank tests, and storage/handling precautions for light‑sensitive reagents are specified. Safety and laboratory practice warnings are included.

Applications - who uses it

Epoxy resin manufacturers for process control and impurity monitoring.

Independent testing laboratories performing compositional analysis and certification.

Formulators and composite manufacturers verifying resin quality for electrical, adhesive, coating or structural applications where chlorohydrin impurities affect performance.

Regulatory and procurement teams requiring documented analytical methods for specifications and acceptance testing.

Related standards

ISO 21627-1 - Determination of inorganic chlorine (ionic chlorine)

ISO 21627-3 - Determination of total chlorine

ISO 3696 - Water for analytical laboratory use

ISO 4615 - Methods for other epoxy resin impurities

Keywords: EN ISO 21627-2:2009, epoxy resins, easily saponifiable chlorine, chlorohydrin, potentiometric titration, silver nitrate, resin quality control.

SIST EN ISO 21627-2:2009 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications - who uses it

Related standards

Технические детали

ISO 21627-2:2009

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

SIST EN ISO 21627-1:2009

Plastics - Epoxy resins - Determination of chlorine content - Part 1: Inorganic chlorine (ISO 21627-1:2009)

SIST EN ISO 21627-3:2009

Plastics - Epoxy resins - Determination of chlorine content - Part 3: Total chlorine (ISO 21627-3:2009)

SIST EN ISO 3696:1998

Water for analytical laboratory use - Specification and test methods (ISO 3696:1987)

SIST EN ISO 4615:2000

Plastics - Unsaturated polyesters and epoxide resins - Determination of total chlorine content (ISO 4615:1979)