EN ISO 2535:1998

Plastics - Unsaturated polyester resins - Measurement of gel time at 25 °C (ISO 2535:1997)

Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Gel-Zeit bei 25°C (ISO 2535:1997)

Diese Internationale Norm beschreibt ein Verfahren zur Bestimmung der Gel-Zeit bei 25° C an ungesättigten Polyesterharzen unter festgelegten Bedingungen. Dieses Verfahren ist für alle Harze anwendbar, aber besonders geeignet für kalthärtende Harze.

Plastiques - Résines de polyesters non saturés - Mesurage de la durée de gélification à 25°C (ISO 2535:1997)

Polimerni materiali - Nenasičene poliestrske smole - Merjenje časa želiranja pri 25 °C (ISO 2535:1997)

General Information

• Status: Withdrawn
• Publication Date: 21-Jul-1998
• Withdrawal Date: 05-Nov-2002
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 06-Nov-2002
• Completion Date: 06-Nov-2002
• Ref Project: SIST EN ISO 2535:2000 - Plastics - Unsaturated polyester resins - Measurement of gel time at 25 °C (ISO 2535:1997)

Relations

• Replaced By: EN ISO 2535:2002 - Plastics - Unsaturated polyester resins - Measurement of gel time at ambient temperature (ISO 2535:2001)
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN ISO 2535:2000
01-maj-2000
3ROLPHUQLPDWHULDOL1HQDVLþHQHSROLHVWUVNHVPROH0HUMHQMHþDVDåHOLUDQMDSUL
ƒ&,62
Plastics - Unsaturated polyester resins - Measurement of gel time at 25 °C (ISO
2535:1997)
Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Gel-Zeit bei 25°C (ISO
2535:1997)
Plastiques - Résines de polyesters non saturés - Mesurage de la durée de gélification a
25°C (ISO 2535:1997)
Ta slovenski standard je istoveten z: EN ISO 2535:1998
ICS:
83.080.10 Duromeri Thermosetting materials
SIST EN ISO 2535:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 2535:2000

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SIST EN ISO 2535:2000

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SIST EN ISO 2535:2000

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SIST EN ISO 2535:2000
INTERNATIONAL
IS0
STANDARD 2535
Second edition
1997-03-01
Plastics - Unsaturated polyester resins -
Measurement of gel time at 25 OC
Plasiiques - Rbsines de polyesters non sat&s - Mesurage du temps de
gblification & 25 OC
Reference number
IS0 2535: 1997(E)

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SIST EN ISO 2535:2000
IS0 2535:1997(E) i
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, governmental 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 International Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard IS0 2535 was prepared by Technical Committee lSO/TC 61, Plastics, Subcommittee SC 12,
Thermosetting materials.
This second edition cancels and replaces the first edition (IS0 2535:1974), of which it constitutes a minor (editorial)
revision.
0 IS0 1997
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 the publisher.
International Organization for Standardization
Case postale 56 l CH-1211 Geneve 20 l Switzerland
Internet central @ iso.ch
x.400
c=ch; a=400net; p=iso; o=isocs; s=central
Printed in Switzerland
ii

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SIST EN ISO 2535:2000
INTERNATIONAL STANDARD o IS0 IS0 2535: 1997(E)
Plastics - Unsaturated polyester resins - Measurement of gel time
at 25 OC
1 Scope
This International Standard specifies a method of measuring, under defined conditions, the gel time at 25 “C of
unsaturated polyester resins.
This method is applicable to all resins, but it is particularly useful for cold-setting resins.
2 Normative reference
The following standard contains provision which, through reference in this text, constitute provisions of IS0 2535. At
the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to
agreements based on IS0 2535 are encouraged to investigate the possibility of applying the most recent editions of
the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International
Standards.
IS0 472:1988, Plastics - Vocabulary.
3 Definition
For the purposes of this International Standard, the following definition applies:
3.1 gel time: The time required for a liquid material to form a gel under specified conditions of temperature.
[ISO 4721
4 Principle
A mixture of resin with specified amounts of standard accelerator and initiator is prepared at 25 “C.
This mixture is placed in a test tube of specified dimensions, which is immersed in a bath thermostatically controlled
at 25 “C.
A device, which is designed to have the least possible effect on the viscometric properties of the mixture, is used to
indicate the exact time that the viscosity of the mixture reaches 50 Pas (500 P) (the viscosity conventionally taken
as corresponding to the start of the gel state). The elapsed time between the end of the addition of the initiator and
accelerator and the moment when the viscosity reaches 50 Pas is conventionally called the “gel time at 25 OC”.
NOTE 1 The type and proportion of accelerator and initiator and the temperature given in this International Standard are
reference conditions.
In particular cases, however, other conditions may be agreed between the interested parties (see 7.2).
5 Reagents
5.1 Acetone, of purity > 99 %.

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SIST EN ISO 2535:2000
0 IS0
IS0 2535: 1997(E)
5.2 Toluene, of purity 3 99 %.
5.3 Reference accelerator: cobalt octoate solution in toluene.
t 0,Ol g of a base solution of cobalt octoate containing 6 % of cobalt metal in an inert
Weigh into a beaker 5 g
solvent. Transfer to a 50 ml volumetric flask fitted with a ground-glass stopper. Make up to 50 ml with toluene (5.2).
1 ml of this solution corresponds to 0,100 g of the base solution of cobalt octoate containing 6 % of cobalt metal.
5.4 Reference initiator: 50 % (m/m) solution of methyl ethyl ketone peroxide in dimethyl phthalate assaying 9 %
of active oxygen.
Store this solution in a refrigerator and use it within 1 month of preparation or receipt.
NOTE 2 Commercial methyl ethyl ketone peroxide is a mixture of isomers in variable proportions, and two commercial
products assaying the same percentage of active oxygen may give different test results (see clause 10).
cobalt octoate solutions be mixed
WARNING - In no circumstances should the methyl ethyl ketone peroxide and
resin.
together, as an explosive mixture is formed. Mix each separately into the polyester
6 Apparatus
6.1 Borosilicate-glass test tube, having an internal diameter of 18 mm, a len
...