SIST EN ISO 21627-2:2009

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

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.

Kunststoffe - Epoxidharze - Bestimmung des Chlorgehaltes - Teil 2: Leicht verseifbares Chlor (ISO 21627-2:2009)

Dieser Teil von ISO 21627 legt ein Verfahren zur Bestimmung des leicht verseifbaren Chlors in Epoxid¬harzen fest.
Der Gehalt an leicht verseifbarem Chlor entspricht der Menge an leicht verseifbarem Chlor in einer vorgegebenen Menge von Epoxidharz.
Die erhaltenen Werte deuten auf die Konzentration des leicht verseifbaren Chlors in Chlorhydrin-Gruppen im Harz hin.

Plastiques - Résines époxydes - Détermination de la teneur en chlore - Partie 2: Chlore facilement saponifiable (ISO 21627-2:2009)

L'ISO 21627-2:2009 spécifie une méthode pour le dosage du chlore facilement saponifiable dans les résines époxydes.
La teneur en chlore facilement saponifiable est la quantité de chlore facilement saponifiable contenue dans une quantité donnée de résine époxyde.
Les valeurs ainsi obtenues donnent une indication concernant la concentration en chlore facilement saponifiable des groupes chlorhydrine de la résine.

Polimerni materiali - Epoksidne smole - Določevanje klora - 2. del: Lahko umiljivi klor (ISO 21627-2:2009)

General Information

• Status: Published
• Publication Date: 19-Nov-2009
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 04-Nov-2009
• Due Date: 09-Jan-2010
• Completion Date: 20-Nov-2009
• Ref Project: EN ISO 21627-2:2009 - Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable chlorine (ISO 21627-2:2009)

Relations

• Replaces: SIST EN ISO 21627-2:2004 - Plastics - Epoxy resins - Determination of chlorine content Part 2: Easily saponifiable chlorine (ISO 21627-2:2002)
• Effective Date: 01-Dec-2009

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.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2009
1DGRPHãþD
SIST EN ISO 21627-2:2004
3ROLPHUQLPDWHULDOL(SRNVLGQHVPROH'RORþHYDQMHNORUDGHO/DKNRXPLOMLYL
NORU,62
Plastics - Epoxy resins - Determination of chlorine content - Part 2: Easily saponifiable
chlorine (ISO 21627-2:2009)
Kunststoffe - Epoxidharze - Bestimmung des Chlorgehaltes - Teil 2: Leicht verseifbares
Chlor (ISO 21627-2:2009)
Plastiques - Résines époxydes - Détermination de la teneur en chlore - Partie 2: Chlore
facilement saponifiable (ISO 21627-2:2009)
Ta slovenski standard je istoveten z: EN ISO 21627-2:2009
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 21627-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
September 2009
ICS 83.080.10 Supersedes EN ISO 21627-2:2003
English Version
Plastics - Epoxy resins - Determination of chlorine content - Part
2: Easily saponifiable chlorine (ISO 21627-2:2009)
Plastiques - Résines époxydes - Détermination de la teneur Kunststoffe - Epoxidharze - Bestimmung des Chlorgehaltes
en chlore - Partie 2: Chlore facilement saponifiable (ISO - Teil 2: Leicht verseifbares Chlor (ISO 21627-2:2009)
21627-2:2009)
This European Standard was approved by CEN on 18 September 2009.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,
Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2009 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 21627-2:2009: E
worldwide for CEN national Members.

Contents Page
Foreword .3

Foreword
This document (EN ISO 21627-2:2009) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
This European Standard shall be given the status of a national standard, either by publication of an identical
text or by endorsement, at the latest by March 2010, and conflicting national standards shall be withdrawn at
the latest by March 2010.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 21627-2:2003.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following
countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 21627-2:2009 has been approved by CEN as a EN ISO 21627-2:2009 without any
modification.
INTERNATIONAL ISO
STANDARD 21627-2
Second edition
2009-09-15
Plastics — Epoxy resins — Determination
of chlorine content —
Part 2:
Easily saponifiable chlorine
Plastiques — Résines époxydes — Détermination de la teneur en
chlore —
Partie 2: Chlore facilement saponifiable

Reference number
ISO 21627-2:2009(E)
©
ISO 2009
ISO 21627-2:2009(E)
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ii © ISO 2009 – All rights reserved

ISO 21627-2:2009(E)
Contents Page
Foreword .iv
Introduction.v
1 Scope.1
2 Normative references.1
3 Terms and definitions .1
4 Principle .1
5 Reagents .2
6 Apparatus.3
7 Procedure.3
8 Expression of results.5
9 Precision .5
10 Test report.5
Bibliography.6

ISO 21627-2:2009(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 21627-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12,
Thermosetting materials.
This second edition cancels and replaces the first edition (ISO 21627-2:2002), which has been technically
revised.
ISO 21627 consists of the following parts, under the general title Plastics — Epoxy resins ― Determination of
chlorine content:
⎯ Part 1: Inorganic chlorine
⎯ Part 2: Easily saponifiable chlorine
⎯ Part 3: Total chlorine
iv © ISO 2009 – All rights reserved

ISO 21627-2:2009(E)
Introduction
In producing epoxy resins based on epichlorohydrin, impurities containing chlorine may be formed. These are
shown below. Since these impurities could impair the final properties of the cured resins, it is necessary to
control their formation. Their chemical activities differ significantly, so different analytical procedures are
needed for their analysis.
ISO 21627 specifies methods for the determination of these organic and inorganic chlorides which occur as
impurities in epoxy resins derived from epichlorohydrin:
⎯ Part 1: Inorganic chlorine (also called ionic chlorine).
⎯ Part 2: Easily saponifiable chlorine, consisting mainly of chlorine which is present as 1,2-chlorohydrin as
the result of incomplete dehydrohalogenation.
⎯ Part 3: Total chlorine, consisting mainly of all
...