EN ISO 3682:1998

Binders for paints and varnishes - Determination of acid value - Titrimetric method (ISO 3682:1996)

This standard specifies a titrimetric method for the determination of the acid value of binders for paints and varnishes.

Bindemittel für Beschichtungsstoffe - Bestimmung der Säurezahl - Titrimetrisches Verfahren (ISO 3682:1996)

Diese internationale Norm legt ein titrimetrisches Verfahren zum Bestimmen der Säurezahl von Bindemitteln für Lacke und Anstrichstoffe fest. Die norm ist nicht für Phenolharze geeignet.

Liants pour peintures et vernis - Détermination de l'indice d'acide - Méthode titrimétrique (ISO 3682:1996)

Veziva za barve in lake - Določanje kislosti - Titracijska metoda (ISO 3682:1996)

General Information

• Status: Withdrawn
• Publication Date: 21-Apr-1998
• Withdrawal Date: 31-Jul-2000
• ICS: 87.060.20 - Binders
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 01-Aug-2000
• Completion Date: 01-Aug-2000
• Ref Project: SIST EN ISO 3682:1998 - Binders for paints and varnishes - Determination of acid value - Titrimetric method (ISO 3682:1996)

Relations

• Replaced By: EN ISO 2114:2000 - Plastics (polyester resins) and paints and varnishes (binders) - Determination of partial acid value and total acid value (ISO 2114:2000)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 3682:1998
01-avgust-1998
9H]LYD]DEDUYHLQODNH'RORþDQMHNLVORVWL7LWUDFLMVNDPHWRGD,62
Binders for paints and varnishes - Determination of acid value - Titrimetric method (ISO
3682:1996)
Bindemittel für Beschichtungsstoffe - Bestimmung der Säurezahl - Titrimetrisches
Verfahren (ISO 3682:1996)
Liants pour peintures et vernis - Détermination de l'indice d'acide - Méthode titrimétrique
(ISO 3682:1996)
Ta slovenski standard je istoveten z: EN ISO 3682:1998
ICS:
87.060.20 Veziva Binders
SIST EN ISO 3682:1998 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 3682:1998

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SIST EN ISO 3682:1998

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SIST EN ISO 3682:1998

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SIST EN ISO 3682:1998
INTERNATIONAL
STANDARD
Third edition
1996-06-o 1
Binders for paints and varnishes -
Determination of acid value -
Titrimetric method
Liants pour peintures et vemis - D&ermina tion de I’indice d ’acide -
Me thode titrimb trique
Reference number
IS0 3682: 1996(E)

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SIST EN ISO 3682:1998
IS0 3682: 1996(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide fed-
eration of national standards bodies (IS0 member bodies). The work of
preparing International Standards is normally carried out through IS0
technical committees. Each member body interested in a subject for
which a technical committee has been established has the right to be rep-
resented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. IS0 col-
laborates closely with the International Electrotechnical Commission (I EC)
on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are cir-
culated to the member bodies for voting. Publication as an International
Standard requires approval by at least 75 % of the member bodies casting
a vote.
International Standard IS0 3682 was prepared by Technical Committee
lSO/TC 35, Paints and varnishes, Subcommittee SCIO, Test methods for
binders for paints and varnishes.
This third edition cancels and replaces the second edition (IS0 3682:1983),
which has been technically and editorially revised. The main change is that
the acid value is no longer related to 1 g of non-volatile matter of the prod-
uct but to 1 g of the product itself.
0 IS0 1996
All rights reserved. Unless otherwise specified, no part of this publication may be repro-
duced or utilized in any form or by any means, electronic or mechanical, including photo-
copying and microfilm, without permissron in writing from the publisher.
International Organization
for Standardization
Case Postale 56 l CH-121
1 Geneve 20 l Switz
Printed in Switzerland

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SIST EN ISO 3682:1998
IS0 3682:1996( E)
INTERNATIONAL STANDARD @ IS0
Binders for paints and varnishes - Determination of acid
value - Titrimetric method
5 Reagents
1 Scope
During the analysis, use only reagents of recognized
This International Standard specifies a titrimetric
analytical grade.
method for determining the acid value of binders for
paints and varnishes.
5.1 Solvent mixture, consisting of 2 parts by vol-
It is not applicable to phenolic resins.
ume of toluene and 1 part by volume of at least 95 %
(V/v) ethanol (see note 4 to 8.2), unless otherwise
agreed or specified. If denaturated alcohol, or alcohol
2 Normative references
of another quality, is used, its suitability for the test
shall be checked. Neutralize, using phenolphthalein as
The following standards contain provisions which,
indicator, the solvent mixture with potassium hydrox-
through reference in this text, constitute provisions of
ide solution (5.2) prior to use.
this International Standard. At the time of publication,
the editions indicated were valid. All standards are
5.2 Potassium hydroxide, standard volumetric
subject to revision, and parties to agreements based
solution, c(KOH) = 0,l mol/l, in 95 % (V/v) ethanol
on this International Standard are encouraged to in-
(see 5.1) or in methanol, free from carbonates, stan-
vestigate the possibility of applying the most recent
dardized against potassium hydrogen phthalate.
editions of the standards indicated below. Members
of IEC and IS0 maintain registers of currently valid ln-
NOTE 1 A 0,5 mol/l standard volumetric solution of pot-
ternational Standards.
assium hydroxide may also be used in cases when more
than 50 ml of titrant would be required with a 0,l mol/l
IS0 385-l :I 984, Laboratory glassware - Burettes -
solution, thus avoiding the additional errors involved in refill-
Part 1: General requirements.
ing the 50 ml burette.
IS0 842: 1984, Raw materials for paints and var-
Check the concentration of this solution on the day of
nishes - Sampling.
use.
5.3 Phenolphthalein, 10 g/l solution in 95 % (VW)
3 Definition
ethanol, in methanol or in isopropanol.
For the purposes of this International Standard, the
NOTE 2 Other suitable indicators may be used, for exam-
following definition applies:
ple a 10 g/l solution of bromothymol blue in 95 % (V/V)
ethanol, in methanol or in isopropanol.
acid value: The number of milligrams of potass-
3.1
ium hydroxide (KOH) required to neutralize the free
acids in 1 g of the product tested.
6 Apparatus
4 Principle
Ordinary laboratory apparatus and glassware, together
with the following:
The free acids contained in a test portion are titrated
with potassium hydroxide solution, either in the pres-
6.1 Conical flask, capacity 250 ml.
ence of
...