Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic anhydride content (ISO 6744-2:1999)

This part of ISO 6744 specifies a method for determining the phthalic anhydride content of alkyd resins.
It is only applicable to those alkyd resins which contain only orthophthalic acid as the polybasic acid. It is not
applicable to modified alkyd resins (see 3.2 of ISO 6744-1:1999) or to resins containing benzoic acid.

Bindemittel für Beschichtungsstoffe - Alkydharze - Teil 2: Bestimmung des Gehaltes an Phthalsäureanhydrid (ISO 6744-2:1999)

Liants pour peintures et vernis - Résines alkydes - Partie 2: Détermination de la teneur en anhydride phtalique (ISO 6744-2:1999)

La présente partie de l'ISO 6744 spécifie une méthode permettant de déterminer la teneur en anhydride phtalique
des résines alkydes.
Elle n'est applicable qu'aux résines alkydes contenant seulement de l'acide orthophtalique comme le acide
polybasique. Elle n'est pas applicable aux résines alkydes modifiées (voir 3.2 de l'ISO 6744-1:1999) ni aux résines
contenant de l'acide benzoïque.

Veziva za barve in lake - Alkidne smole - 2. del: Določevanje anhidrida ftalne kisline (ISO 6744-2:1999)

General Information

Status
Published
Publication Date
25-May-2004
ICS
87.060.20 - Binders
Technical Committee
CEN/TC 139 - Paints and varnishes
Drafting Committee
CEN/TC 139 - Paints and varnishes
Current Stage
9093 - Decision to confirm - Review Enquiry
Start Date
11-Sep-2009
Completion Date
11-Sep-2009
Ref Project
SIST EN ISO 6744-2:2004 - Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic anhydride content (ISO 6744-2:1999)

Overview

EN ISO 6744-2:2004 is an international standard developed by the European Committee for Standardization (CEN) aligned with ISO 6744-2:1999. It specifies a standardized method for determining the phthalic anhydride content in alkyd resins used as binders for paints and varnishes. This test method applies exclusively to alkyd resins where orthophthalic acid is the sole polybasic acid component. The standard excludes modified alkyd resins and those containing benzoic acid.

The accurate measurement of phthalic anhydride content is crucial in quality control and formulation of alkyd resins since it directly impacts the resin's chemical properties, durability, and performance in coatings.

Key Topics

  • Scope and Applicability
    The standard is applicable only to alkyd resins containing orthophthalic acid without modification. Modified alkyds or benzoic acid-containing resins require alternative methods.

  • Test Principle
    The resin sample is saponified using a potassium hydroxide solution under reflux. The resulting potassium phthalate precipitate is then filtered, dried, and weighed to determine the phthalic anhydride content.

  • Sample Preparation and Handling
    A representative test portion weighing typically 3-5 grams is dissolved in toluene and treated according to the protocol with precise control of reagents and conditions.

  • Reagents and Apparatus
    The method specifies the use of analytical grade reagents such as toluene, potassium hydroxide in absolute ethanol, and solvent mixtures, along with specialized laboratory equipment including reflux condensers, sintered-glass crucibles, and drying ovens.

  • Calculation of Results
    Phthalic anhydride content is calculated as a percentage of the sample mass based on the weight of potassium phthalate precipitate, using two conversion factors accounting for solvent-bound and solvent-free forms.

  • Quality Assurance
    Duplicate determinations ensure repeatability. If discrepancies are greater than 2%, the method may not be applicable for a given resin, indicating the need for alternative testing approaches.

Applications

  • Quality Control of Alkyd Resins
    Ensures resin batches meet defined chemical composition requirements related to phthalic anhydride content, which influences resin reactivity and coating performance.

  • Research and Development
    Assists chemists and formulators in characterizing alkyd resin composition during the development of new paint and varnish products.

  • Conformance and Regulatory Compliance
    Provides a harmonized and internationally recognized test method ensuring products comply with industrial standards for binder materials in coatings.

  • Supplier and Material Verification
    Suppliers and buyers can verify resin purity and consistency to guarantee optimal performance in architectural, industrial, and automotive coatings.

Related Standards

  • EN ISO 6744-1:1999 – Binders for paints and varnishes - Alkyd resins - Part 1: General methods of test
  • EN ISO 6744-3:1999 – Binders for paints and varnishes - Alkyd resins - Part 3: Determination of unsaponifiable matter content
  • EN ISO 6744-4:1999 – Binders for paints and varnishes - Alkyd resins - Part 4: Determination of fatty acid content
  • ISO 3681:1996 – Binders for paints and varnishes - Determination of saponification value - Titrimetric method
  • ISO 3696:1987 – Water for analytical laboratory use - Specification and methods of test
  • ISO 15528 – Paints, varnishes and raw materials for paints and varnishes - Sampling

These complementary standards support comprehensive testing and characterization of alkyd resins ensuring full compliance and quality assurance for manufacturers and users of paint and varnish binders.

Keywords: EN ISO 6744-2, alkyd resins, phthalic anhydride content, paint binders, varnish resins, saponification, potassium phthalate, ISO standard, coating materials, quality control, alkyd resin testing, chemical composition measurement, CEN standards.

Frequently Asked Questions

EN ISO 6744-2:2004 is a standard published by the European Committee for Standardization (CEN). Its full title is "Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic anhydride content (ISO 6744-2:1999)". This standard covers: This part of ISO 6744 specifies a method for determining the phthalic anhydride content of alkyd resins. It is only applicable to those alkyd resins which contain only orthophthalic acid as the polybasic acid. It is not applicable to modified alkyd resins (see 3.2 of ISO 6744-1:1999) or to resins containing benzoic acid.

This part of ISO 6744 specifies a method for determining the phthalic anhydride content of alkyd resins. It is only applicable to those alkyd resins which contain only orthophthalic acid as the polybasic acid. It is not applicable to modified alkyd resins (see 3.2 of ISO 6744-1:1999) or to resins containing benzoic acid.

EN ISO 6744-2:2004 is classified under the following ICS (International Classification for Standards) categories: 87.060.20 - Binders. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 6744-2:2004 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-julij-2004
Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic
anhydride content (ISO 6744-2:1999)
Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic
anhydride content (ISO 6744-2:1999)
Bindemittel für Beschichtungsstoffe - Alkydharze - Teil 2: Bestimmung des Gehaltes an
Phthalsäureanhydrid (ISO 6744-2:1999)
Liants pour peintures et vernis - Résines alkydes - Partie 2: Détermination de la teneur
en anhydride phtalique (ISO 6744-2:1999)
Ta slovenski standard je istoveten z: EN ISO 6744-2:2004
ICS:
87.060.20 Veziva Binders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6744-2
First edition
1999-12-01
Binders for paints and varnishes — Alkyd
resins —
Part 2:
Determination of phthalic anhydride
content
Liants pour peintures et vernis — Résines alkydes —
Partie 2: Détermination de la teneur en anhydride phtalique
Reference number
ISO 6744-2:1999(E)
©
ISO 1999
ISO 6744-2:1999(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland
ii © ISO 1999 – All rights reserved

ISO 6744-2:1999(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 3.
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 part of ISO 6744 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 6744-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes,
Subcommittee SC 10, Test methods for binders for paints and varnishes.
Together with the other parts (see below), this part of ISO 6744 cancels and replaces ISO 6744:1984, which has
been technically revised.
ISO 6744 consists of the following parts, under the general title Binders for paints and varnishes — Alkyd resins:
� Part 1: General methods of test
� Part 2: Determination of phthalic anhydride content
� Part 3: Determination of unsaponifiable matter content
� Part 4: Determination of fatty acid content
© ISO 1999 – All rights reserved iii

INTERNATIONAL STANDARD ISO 6744-2:1999(E)
Binders for paints and varnishes — Alkyd resins —
Part 2:
Determination of phthalic anhydride content
1 Scope
This part of ISO 6744 specifies a method for determining the phthalic anhydride content of alkyd resins.
It is only applicable to those alkyd resins which contain only orthophthalic acid as the polybasic acid. It is not
applicable to modified alkyd resins (see 3.2 of ISO 6744-1:1999) or to resins containing benzoic acid.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 6744. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 6744 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 3681:1996, Binders for paints and varnishes — Determination of saponification value — Titrimetric method.
ISO 3696:19
...


SLOVENSKI STANDARD
01-julij-2004
Veziva za barve in lake - Alkidne smole - 2. del: Določevanje anhidrida ftalne
kisline (ISO 6744-2:1999)
Binders for paints and varnishes - Alkyd resins - Part 2: Determination of phthalic
anhydride content (ISO 6744-2:1999)
Bindemittel für Beschichtungsstoffe - Alkydharze - Teil 2: Bestimmung des Gehaltes an
Phthalsäureanhydrid (ISO 6744-2:1999)
Liants pour peintures et vernis - Résines alkydes - Partie 2: Détermination de la teneur
en anhydride phtalique (ISO 6744-2:1999)
Ta slovenski standard je istoveten z: EN ISO 6744-2:2004
ICS:
87.060.20 Veziva Binders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 6744-2
First edition
1999-12-01
Binders for paints and varnishes — Alkyd
resins —
Part 2:
Determination of phthalic anhydride
content
Liants pour peintures et vernis — Résines alkydes —
Partie 2: Détermination de la teneur en anhydride phtalique
Reference number
ISO 6744-2:1999(E)
©
ISO 1999
ISO 6744-2:1999(E)
PDF disclaimer
This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not
be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this
file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this
area.
Adobe is a trademark of Adobe Systems Incorporated.
Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters
were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event
that a problem relating to it is found, please inform the Central Secretariat at the address given below.
© ISO 1999
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic
or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body
in the country of the requester.
ISO copyright office
Case postale 56 � CH-1211 Geneva 20
Tel. + 41 22 749 01 11
Fax + 41 22 734 10 79
E-mail copyright@iso.ch
Web www.iso.ch
Printed in Switzerland
ii © ISO 1999 – All rights reserved

ISO 6744-2:1999(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 3.
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 part of ISO 6744 may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 6744-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes,
Subcommittee SC 10, Test methods for binders for paints and varnishes.
Together with the other parts (see below), this part of ISO 6744 cancels and replaces ISO 6744:1984, which has
been technically revised.
ISO 6744 consists of the following parts, under the general title Binders for paints and varnishes — Alkyd resins:
� Part 1: General methods of test
� Part 2: Determination of phthalic anhydride content
� Part 3: Determination of unsaponifiable matter content
� Part 4: Determination of fatty acid content
© ISO 1999 – All rights reserved iii

INTERNATIONAL STANDARD ISO 6744-2:1999(E)
Binders for paints and varnishes — Alkyd resins —
Part 2:
Determination of phthalic anhydride content
1 Scope
This part of ISO 6744 specifies a method for determining the phthalic anhydride content of alkyd resins.
It is only applicable to those alkyd resins which contain only orthophthalic acid as the polybasic acid. It is not
applicable to modified alkyd resins (see 3.2 of ISO 6744-1:1999) or to resins containing benzoic acid.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 6744. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 6744 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 3681:1996, Binders for paints and varnishes — Determination of saponification value — Titrimetric method.
ISO 3696:1987, Water for
...

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