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STANDARD 9514
First edition
1992-l 2-15
Paints and varnishes - Determination of the
pot-life of liquid systems - Preparation and
conditioning of samples and guidelines for
testing
Peinfures et vernis - Ut?terminafion du dblai maximal d’utilisation apr&
melange des pein tures liquides - Pr@paration et conditionnement des
khantillons et lignes directrices pour les essais
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Reference number
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-_._--___--- IS0 9514: 1992(E)
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IS0 9514:1992(E)
Foreword
IS0 (the International Organization for Standardization) is a worldwide
federation 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
represented on that committee. International organizations, govern-
mental and non-governmental, in liaison with ISO, also take part in the
work. IS0 collaborates closely with the International Electrotechnical
Commission (IEC) on all matters of electrotechnical standardization.
Draft International Standards adopted by the technical committees are
circulated to the member bodies for voting. Publication as an Inter-
national Standard requires approval by at least 75 % of the member
bodies casting a vote.
International Standard IS0 9514 was prepared by Technical Committee
ISO/TC 35, Paints and varnishes, Sub-Committee SC 9, General test
methods for paints and varnishes.
Annex A forms an integral part of this International Standard. Annexes
B and C are for information only.
0 IS0 1992
All rights reserved. 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 the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerland
Printed in Switzerland
ii
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INTERNATIONAL STANDARD IS0 9514:1992(E)
- Determination of the pot-life of liquid
Paints and varnishes
- Preparation and conditioning of samples and
systems
guidelines for testing
cation, the editions indicated were valid. All stan-
1 Scope
dards are subject to revision, and parties to
agreements based on this International Standard
This International Standard is one of a series of
are encouraged to investigate the possibility of ap-
standards dealing with the sampling and testing of
plying the most recent tlditions of the standards in-
paints, varnishes and related products.
dicated below. Members of IEC and IS0 maintain
registers of currently valid International Standards.
This International Standard specifies a method, car-
ried out under standard conditions, for preparing
IS0 1512:1991, Paints and varnishes - Sampling of
and storing a sample so that its pot-life may be as-
products in liquid or paste form.
sessed by measuring a particular property.
Reactive systems curing within a 3-h period of time
IS0 1513:1992, Paints and varnishes - Examination
will have the end of their pot-life so near to the gel
and preparation of samples for testing.
point that they will need to be tested for that partic-
ular property in accordance with IS0 2535[2].
IS0 3270:1984, Paints and varnishes and their raw
materials - Temperatures and humidities for con-
Special “low-temperature” grades, curing within
ditioning and testing.
3 h under standard conditions, will need to be tested
at a lower specified temperature, so that it is poss-
IS0 4618-111984, Paints and varnishes - Vocabulary
ible to investigate particular properties, as required.
- Part I: General terms.
The value obtained may be subject to modification
by suppliers for practical reasons (e.g. starting tem-
3 Definition
perature) when giving advice to users and should
then be called the “practical pot-life”.
For the purposes of this International Standard, the
following definition applies.
The method may be carried out
3.1 pot-life: Maximum time during which a product
-
either as a pass/fail test by determining the par-
supplied as separate components should be used
ticular property after a specified period of time,
after they have been mixed together.
or
[ISO 4618-I:19841
-
as determination of the pot-life by repeating de-
terminations at convenient intervals of time.
NOTE 1 It is important that, in this definition, the words
“should be used” are understood to refer to the applica-
This International Standard is not intended for in situ
tion properties of the reactive system under test as well
control on products during their application. It is in- as the properties of the dried film.
tended to determine “pot-life” in the laboratory.
4 Principle
2 Normative references
The components of the reactive system are condi-
tioned separately and then mixed; the blend is al-
The following standards contain provisions which,
lowed to stand for specified period(s) of time under
through reference in this text, constitute provisions
nearly adiabatic conditions (see note 3). Sub-
of this International Standard. At the time of publi-
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IS0 9514:1992(E)
sequently, a sample is withdrawn from the blend Examine and prepare each sample for testing, as
and a particular property (see note 2) is measured described in IS0 1513.
to check compliance with the requirement for that
property for the product under test.
8 Procedure
NOTES
Carry out the test in duplicate.
2 For the different reactive systems, the pot-life is de-
per;dent on a variety of properties; because of this vari-
8.1 Condition the components of the reactive sys-
ety, the pot-life can only be specified with reference to a
tem separately in accordance with IS0 3270. After
particular property. Guidance on the property to be tested
for various reactive systems is given in annex B.
conditioning at the specified temperature, the differ-
ence in temperature between the components shall
3 This International Standard specifies the conditions for
not be greater than 1 OC.
preparing and storing a sample in order to assess the
pot-life; these conditions must be near to adiabatic so that
Special “low-temperature” grades, curing within
they bear a close relationship to those which exist in
3 h under standard conditions, shall be tested at a
practice.
lower specified temperature, so that it is possible to
investigate particular properties, as required.
5 Required supplementary information
8.2 Mix the components in accordance with the
instructions given for the particular system and to
For any particular application, the test method
give a convenient quantity of blend for testing.
specified in this International Standard needs to be
completed by supplementary information. The items
Put (300 + 3) ml o
...