EN ISO 8623:2015

SLOVENSKI STANDARD
01-november-2015
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SIST EN ISO 8623:2013
SIST ISO 8623:1998
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Tall-oil fatty acids for paints and varnishes - Test methods and characteristic values (ISO
8623:2015)
Tallöl-Fettsäuren für Beschichtungsstoffe - Prüfverfahren und Kennwerte (ISO
8623:2015)
Acides gras d'huile de tall pour peintures et vernis - Spécifications et méthodes d'essai
(ISO 8623:2015)
Ta slovenski standard je istoveten z: EN ISO 8623:2015
ICS:
87.060.99 Druge sestavine barv Other paint ingredients
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 8623
EUROPEAN STANDARD
NORME EUROPÉENNE
September 2015
EUROPÄISCHE NORM
ICS 87.060.99 Supersedes EN ISO 8623:2010
English Version
Tall-oil fatty acids for paints and varnishes - Test methods
and characteristic values (ISO 8623:2015)
Acides gras de tall-oil pour peintures et vernis - Tallöl-Fettsäuren für Beschichtungsstoffe -
Méthodes d'essai et valeurs caractéristiques (ISO Prüfverfahren und Kennwerte (ISO 8623:2015)
8623:2015)
This European Standard was approved by CEN on 31 July 2015.

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-CENELEC 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-CENELEC Management
Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8623:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
European foreword
This document (EN ISO 8623:2015) has been prepared by Technical Committee ISO/TC 35 “Paints and
varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
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 2016, and conflicting national standards shall
be withdrawn at the latest by March 2016.
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 8623:2010.
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,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 8623:2015 has been approved by CEN as EN ISO 8623:2015 without any modification.

INTERNATIONAL ISO
STANDARD 8623
Second edition
2015-08-15
Tall-oil fatty acids for paints and
varnishes — Test methods and
characteristic values
Acides gras de tall-oil pour peintures et vernis — Méthodes d’essai et
valeurs caractéristiques
Reference number
ISO 8623:2015(E)
©
ISO 2015
ISO 8623:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
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Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2015 – All rights reserved

ISO 8623:2015(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Test methods and characteristic values . 1
Annex A (normative) Determination of unsaponifiable matter (Diethyl ether method) .2
Annex B (normative) Determination of rosin acid content . 5
ISO 8623:2015(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
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. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 35, Paints and varnishes, Subcommittee SC 10,
Test methods for binders for paints and varnishes.
This second edition cancels and replaces the first edition (ISO 8623:1997), which has been technically
revised with the following changes:
— the former requirements were changed to information on characteristic values;
— the data for unsaponifiable matter content was changed from mass fraction of max. 2,5 % to max. 5 %;
— the method for the determination of the unsaponifiable matter (diethyl ether method) was
implemented from the 1980 edition of ISO 150 because it is no longer included in the actual revision
of ISO 150, i.e. ISO 150:2006;
— the concentration of phenolphthalein indicator solution was changed from 10 g/l in ethanol to 5 g/l
in ethanol or in a 1:1 ethanol/water mixture.
iv © ISO 2015 – All rights reserved

ISO 8623:2015(E)
Introduction
Normally, requirements are agreed between the interested parties. So with this new edition, this
International Standard no longer specifies requirements but only test methods and gives information
on characteristic values for tall-oil fatty acids.
INTERNATIONAL STANDARD ISO 8623:2015(E)
Tall-oil fatty acids for paints and varnishes — Test methods
and characteristic values
1 Scope
This International Standard specifies test methods and gives information on characteristic values for
distilled tall-oil fatty acids for paints and varnishes.
2 Normative references
The following documents, in whole or in part, are normally referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 383, Laboratory glassware — Interchangeable conical ground joints
ISO 2114, Plastics (polyester resins) and paints and varnishes (binders) — Determination of partial acid
value and total acid value
ISO 2811 (all parts), Paints and varnishes — Determination of density
ISO 3681, Binders for paints and varnishes — Determination of saponification value — Titrimetric method
ISO 3696, Water for analytical laboratory use — Specification and test methods
ISO 3961, Animal and vegetable fats and oils — Determination of iodine value
ISO 4630, Clear liquids — Estimation of colour by the Gardner colour scale
3 Test methods and characteristic values
Test methods and typical characteristic values for tall-oil fatty acids for paints and varnishes are
given in Table 1.
Table 1 — Test methods and characteristic values for tall-oil fatty acids
Property Characteristic value Test method
at 20 °C            g/cm 0,900 to 0,910
Density ISO 2811
at 23 °C            g/cm 0,898 to 0,908
Colour max. 5 ISO 4630
Acid value mg KOH/g min. 192 ISO 2114
Saponification value mg KOH/g min. 193 ISO 3681
Iodine value g Iodine /100 g min. 125 ISO 3961
Unsaponifiable matter % (mass fraction) max. 5 Annex A
Rosin acid content % (mass fraction) max. 2,5 Annex B
ISO 8623:2015(E)
Annex A
(normative)
Determination of unsaponifiable matter (Diethyl ether method)
A.1 General
This test method is applicable to all fats. It is, however, only approximate for certain fats having high
content of unsaponifiable matter.
A.2 Terms and definitions
A.2.1
unsaponifiable matter
substances soluble in the fat, which after saponification are insoluble in water but soluble in the solvent
used for the determination
Note 1 to entry It includes lipids of natural origin such as sterols, alcohols and hydrocarbons as well as any
foreign organic matter non-volatile at 100 °C (mineral oils) which may be present.
A.3 Apparatus
Use ordinary laboratory apparatus and glassware, together with the following:
A.3.1 150 ml flask fitted with a reflux condenser.
A.3.2 500 ml separating funnels.
A.3.3 Oven, regulated at (103 ± 2) °C.
A.4 Reagents
During the analysis, use only reagents of recognized analytical grade and only water of at least
grade 3 as defined in ISO 3696.
A.4.1 Aqueous solution of potassium hydroxide, c (KOH) = 28 g/l.
A.4.2 Ethanolic solution of potassium hydroxide, c (KOH) ≈ 112 g/l.
Dissolve 120 g potassium hydroxide in ethanol, c (C H OH) = 95 % volume fraction, and make up to 1 l.
2 5
The reagent shall not be darker than straw yellow.
A.4.3 Diethyl ether, free from residue.
NOTE Diethyl ether is used as a solvent which generally gives higher result than light petroleum solvents.
2 © ISO 2015 – All rights reserved

ISO 8623:2015(E)
A.5 Procedure
Weigh about 5 g of fat to within 0,01 g into the flask (A.3.1).
Add 50 ml of the ethanolic potassium hydroxide solution (A.4.2). Attach the condenser. Boil gently for
an hour.
When heating is completed, wait for the solution to cool down and disconnect the condenser. Transfer
the contents of the flask into a separating funnel (A.3.2), rinsing the flask with distilled water (100 ml
in all). Transfer this water also in the separating funnel.
Rinse the flask and the condenser with 100 ml of diethyl ether and pour this into the separating funnel.
Stopper and shake vigorously. While the contents are
...