EN ISO 2535:2002
(Main)Plastics - Unsaturated polyester resins - Measurement of gel time at ambient temperature (ISO 2535:2001)
Plastics - Unsaturated polyester resins - Measurement of gel time at ambient temperature (ISO 2535:2001)
This International Standard specifies methods of measuring, under defined conditions, the gel time at ambient
temperature (i.e. within the range 18 °C to 30 °C) of unsaturated-polyester resins.
The referee temperature, if needed, is 25 °C.
Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Gelzeit bei Umgebungstemperatur (ISO 2535:2001)
Diese Internationale Norm legt Verfahren zur Bestimmung der Gelzeit bei Umgebungstemperatur (d. h. im Bereich von 18 °C bis 30 °C) von ungesättigten Polyesterharzen unter festgelegten Bedingungen fest.
Die Bezugstemperatur, falls erforderlich, beträgt 25 °C.
Plastiques - Résines de polyesters non saturés - Mesurage du temps de gel à température ambiante (ISO 2535:2001)
La présente Norme internationale spécifie des méthodes de mesurage, dans des conditions définies, du temps de
gel à température ambiante (dans l'intervalle 18 °C à 30 °C) des résines de polyesters non saturés.
Si nécessaire, la température de référence de l'essai est 25 °C.
Polimerni materiali - Nenasičene poliestrske smole - Merjenje časa želiranja pri sobni temperaturi (ISO 2535:2001)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-maj-2003
1DGRPHãþD
SIST EN ISO 2535:2000
3ROLPHUQLPDWHULDOL1HQDVLþHQHSROLHVWUVNHVPROH0HUMHQMHþDVDåHOLUDQMDSUL
VREQLWHPSHUDWXUL ,62
Plastics - Unsaturated polyester resins - Measurement of gel time at ambient
temperature (ISO 2535:2001)
Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Gelzeit bei
Umgebungstemperatur (ISO 2535:2001)
Plastiques - Résines de polyesters non saturés - Mesurage du temps de gel a
température ambiante (ISO 2535:2001)
Ta slovenski standard je istoveten z: EN ISO 2535:2002
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 2535
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2002
ICS 83.080.10 Supersedes EN ISO 2535:1998
English version
Plastics - Unsaturated polyester resins - Measurement of gel
time at ambient temperature (ISO 2535:2001)
Plastiques - Résines de polyesters non saturés - Mesurage Kunststoffe - Ungesättigte Polyesterharze - Bestimmung
du temps de gel à température ambiante (ISO 2535:2001) der Gel-Zeit bei Umgebungstemperatur (ISO 2535:2001)
This European Standard was approved by CEN on 23 September 2002.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
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Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 2535:2002 E
worldwide for CEN national Members.
Foreword
The text of ISO 2535:2001 has been prepared by Technical Committee ISO/TC 61 "Plastics"
of the International Organization for Standardization (ISO) and has been taken over as EN
ISO 2535:2002 by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is
held by IBN.
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 May 2003, and conflicting national
standards shall be withdrawn at the latest by May 2003.
This document supersedes EN ISO 2535:1998.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the
United Kingdom.
Endorsement notice
The text of ISO 2535:2001 has been approved by CEN as EN ISO 2535:2002 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions
of any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated by
(mod.), the relevant EN/HD applies.
Publication Year Title EN/HD Year
ISO 472 1999 Plastics -Vocabulary EN ISO 472 2001
INTERNATIONAL ISO
STANDARD 2535
Third edition
2001-07-15
Plastics — Unsaturated-polyester resins —
Measurement of gel time at ambient
temperature
Plastiques — Résines de polyesters non saturés — Mesurage du temps de
gel à température ambiante
Reference number
ISO 2535:2001(E)
©
ISO 2001
ISO 2535:2001(E)
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ii © ISO 2001 – All rights reserved
ISO 2535:2001(E)
Contents Page
Foreword.iv
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Principle.1
5 Reagents.2
6 Apparatus .2
7 Procedure .3
8 Expression of results .4
9 Precision.4
10 Test report .4
Annex A (normative) Automatic-release apparatus .5
Annex B (normative) Continuous-measurement apparatus.7
ISO 2535:2001(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 International Standard may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 2535 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12,
Thermosetting materials.
This third edition cancels and replaces the second edition (ISO 2535:1997), which has been revised to include four
variants of the original method, calibration procedures for the device used to determine the gel time (see clauses
A.2 and B.2) and precision data.
Annexes A and B form a normative part of this International Standard.
iv © ISO 2001 – All rights reserved
INTERNATIONAL STANDARD ISO 2535:2001(E)
Plastics — Unsaturated-polyester resins — Measurement of gel
time at ambient temperature
1 Scope
This International Standard specifies methods of measuring, under defined conditions, the gel time at ambient
temperature (i.e. within the range 18 °Cto30 °C) of unsaturated-polyester resins.
The referee temperature, if needed, is 25 °C.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this International Standard. For dated references, subsequent amendments to, or revisions of, any of these
publications do not apply. However, parties to agreements based on this International Standard 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 472:1999, Plastics — Vocabulary.
ISO 4619:1998, Driers for paints and varnishes.
ISO 15038:1999, Plastics — Organic-perester crosslinking agents for unsaturated-polyester thermosetting
materials — Determination of active-oxygen content.
3 Terms and definitions
For the purposes of this International Standard, the terms and definitions given in ISO 472 apply, together with the
following term and definition.
3.1
gel time at ambient temperature
the time which elapses between the end of the addition of an initiator to a resin and the moment when the viscosity
reaches 50 Pa�s
4Principle
The time required for a defined formula (resin, accelerator, initiator) at ambient temperature (within the range 18 °C
to 30 °C) to reach a viscosity of 50 Pa�s (the viscosity conventionally accepted as corresponding to the gel state) is
measured.
ISO 2535:2001(E)
Four methods are specified:
Method A1 uses an automatic-release device (see annex A) in which a glass rod rotates in a resin mixture
contained in a test tube, and rotation of the glass rod is stopped automatically when a viscosity of 50 Pa�sis
reached.
Method A2 also uses an automatic-release device, but the resin mixture is contained in a beaker.
Method B1 uses a continuous-measurement device (see annex B) in which a glass rod executes a horizontal
oscillatory motion in a resin mixture contained in a test tube. The viscosity is measured continuously to obtain
a plot of viscosity against time.
Method B2 also uses a continuous-measurement device, but the resin mixture is contained in a beaker.
5 Reagents
Use only reagents of recognized analytical grade.
5.1 Toluene.
5.2 Reference accelerator: cobalt octoate solution containing 0,6 % by mass of Co.
This solution may, for example, be prepared as follows:
Pipette 5 ml of a stock solution of cobalt octoate, containing 6 % by mass of Co, in an inert solvent (for example an
aliphatic ester) into a volumetric flask fitted with a ground-glass stopper. Dilute to 50 ml with toluene (5.1) and mix
well by shaking.
1 ml of this solution corresponds to 0,100 g of the stock solution of cobalt octoate containing 6 % by mass of Co.
If it is necessary to determine the Co content of any solutions, this shall be done in accordance with ISO 4619.
5.3 Reference initiator: 50 % by mass solution of methyl ethyl ketone peroxide in dimethyl phthalate, the
solution assaying 9 % of active oxygen.
Check the active-oxygen content using the method specified in ISO 15038.
It is desirable to store the peroxide solution at low temperature (5 °C), e.g. in a refrigerator. In this case, the
solution shall be maintained at room temperature for 24 h prior to use.
WARNING — Never mix the methyl ethyl ketone peroxide with the cobalt octoate solution, as an explosive
mixture is formed. Mix each separately into the unsaturated-polyester resin.
6 Apparatus
6.1 Measurement vessel, capable of containing the quantity of mixture required
...
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