EN ISO 584:1997

Plastics - Unsaturated polyester resins - Determination of reactivity at 80 °C (conventional method) (ISO 584:1982)

Specifies a method for the determination of the reactivity of unsaturated polyester resins as characterized by the maximum temperature reached when heated with catalyst in a water-bath at 80 °C and by the time taken for the temperatur of the mixture to rise from 65 °C to this maximum temperature. As the test results depend very much on the conditions under which the test is carried out, these conditions are described in detail.

Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Reaktivität bei 80°C (Herkömmliches Verfahren) (ISO 584:1982)

Diese Internationale Norm beschreibt ein Verfahren zur Bestimmung der Reaktivität von ungesättigten Polyesterharzen in der Weise, daß die Höchsttemperatur einer Lösung von ungesättigtem Polyesterharz und Katalysator erreicht wird, wenn diese in einem Wasserbad bei 80 °C erwärmt wird. Dabei wird die Ziet gemessen, bis die Mischung von 65 °C bis zur Höchsttemperatur gestiegen ist. Wenn die Höchsttemperatur 90 °C übersteigt, wird die Zeit gemessen, bis die Mischung von 65 °C bis 90 °C gestiegen ist.

Plastiques - Résines de polyesters non saturés - Détermination conventionnelle de la réactivité à 80°C (ISO 584:1982)

Polimerni materiali – Nenasičene poliestrske smole – Ugotavljanje reaktivnosti pri 80 °C (klasična metoda) (ISO 584:1982)

General Information

• Status: Published
• Publication Date: 18-Nov-1997
• Withdrawal Date: 30-May-1998
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249/SC 1/WG 13 - Thermosets
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 19-Nov-1997
• Completion Date: 19-Nov-1997
• Ref Project: SIST EN ISO 584:1999 - Plastics - Unsaturated polyester resins - Determination of reactivity at 80 °C (conventional method) (ISO 584:1982)

Overview

EN ISO 584:1997 (ISO 584:1982) specifies a conventional laboratory method for determining the reactivity of unsaturated polyester resins. Reactivity is measured by heating a resin–catalyst mixture in a thermostatted water bath at 80 °C and recording (a) the maximum temperature reached and (b) the time for the temperature to rise from 65 °C to the maximum (or to 90 °C if the maximum exceeds 90 °C). The standard defines detailed test conditions because results are highly sensitive to test geometry, temperature control and instrumentation.

Key topics and requirements

• Test principle: mix resin with catalyst and monitor temperature rise vs time in a controlled 80 °C bath to characterize polymerization rate.
• Catalyst: benzoyl peroxide (or a 50% w/w benzoyl peroxide in dibutyl phthalate mixture as supplied); safety warning about handling pure benzoyl peroxide is included.
• Test portion and proportions: typical mix described as 100 parts resin with 1 part catalyst (procedure uses 2.00 ± 0.01 g of catalyst mixture with 100 ± 1 g resin).
• Apparatus and dimensions:
  • Water bath maintained at 80 ± 0.5 °C with stirring and circulation.
  • Test-tube: borosilicate glass, internal diameter 18 ± 1 mm, length 210 ± 5 mm, wall thickness 1 ± 0.2 mm.
  • Thermocouple: iron-constantan recommended, wire diameter 1 ± 0.05 mm, welded junction ≤ 2 mm, capable of recording to 250 °C; screened thermocouples preferred.
  • Optional recorder to log temperature vs time.
• Measurement endpoints:
  • Maximum temperature reached.
  • Time from 65 °C to maximum (or 65 → 90 °C when applicable).
• Repeatability and acceptance: repeat tests until two consecutive determinations agree within ±5 °C for temperature and ±10% for time.
• Reporting: include identification of resin, thermocouple type, individual and average values, any deviations from specified conditions, and recorded graphs if used.

Applications

• Quality control and batch comparison of unsaturated polyester resins.
• Formulation and R&D to evaluate cure rate changes when modifying resin or catalyst systems.
• Comparative screening of resin suppliers or catalyst variants under standardized conditions.
• Process development where relative reactivity influences mold cycle times, heat management and safety.

Who uses this standard

• Polymer chemists and formulation scientists
• Quality assurance and laboratory technicians in composites and thermoset manufacturing
• R&D labs developing unsaturated polyester resin systems
• Suppliers and purchasers performing comparative acceptance testing

Related standards

• EN/ISO standards and CEN documents addressing plastics testing, thermosetting materials and catalyst specifications are complementary to EN ISO 584 for comprehensive resin evaluation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-1999
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Plastics - Unsaturated polyester resins - Determination of reactivity at 80 °C
(conventional method) (ISO 584:1982)
Kunststoffe - Ungesättigte Polyesterharze - Bestimmung der Reaktivität bei 80°C
(Herkömmliches Verfahren) (ISO 584:1982)
Plastiques - Résines de polyesters non saturés - Détermination conventionnelle de la
réactivité a 80°C (ISO 584:1982)
Ta slovenski standard je istoveten z: EN ISO 584:1997
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWVlE)I(CIYHAPO~HAR OPrAHM3AlWlR fl0 CTAH&‘WTM3ALWll4WIRGANISATION INTERNATIONALE DE NORMALISATION
Plastics - Unsaturated Polyester resins - Determination
of reactivity at 80 OC (conventional method)
Plastiques - Rksines de polyesters non saturks - Determination conventionnelfe de Ia rtGactivit6 6 80 OC
First edition - 1982-12-01
Ref. No. ISO 584-1982 (E)
UDC 678.674 : 543.878
Chemical analysis, determination, Chemical reactivity.
Descriptors : plastics, Polyester resins,
Price based on 3 pages
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of developing International
Standards is carried out through ISO technical committees. Every member body
interested in a subject for which a technical committee has been authorized 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.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the ISO Council.
International Standard ISO 584 was developed by Technical Committee ISO/TC 61,
Hastics, and was circujated to the member bodies in July 1980.
ft has been approved by the member bodies sf the following countries :
Australia Hungary New Zealand
Austria
India Poland
Canada Iran Romania
China Ireland South Africa, Rep. of
Czechoslovakia Israel Spain
Egypt, Arab Rep. of Italy Sweden
ßinland Japan USA
France Korea, Rep. of USSR
Germany, ß. R. Netherlands
The member bodies of the following countries expressed disapproval of the document
on technical grounds :
Belgium
United Kingdom
This International Standard tan cels and repl aces ISO Recommendation R 5844967 of
which it constitutes a technical revision
0 international Organization for Standardization, 1982
Printed in Switzeriand
INTERNATIONAL STANDARD ISO 5844982 (E)
Plastics - Unsaturated Polyester resins - Determination
of reactivity at 80 OC (conventional method)
the mixture to rise from 65 OC to this maximum temperature,
0 lntroduction
and also, if the maximum temperature exceeds 90 OC, by the
time taken for the temperature to rise from 65 to 90 OC.
The processing of unsaturated Polyester resins depends on
their reactivity, i.e., their rate of polymerization in the presence
These characteristics give an indication of the processing
of a catalyst. The evaluation of their reactivity tan be carried
behaviour of unsaturated Polyester resins and tan be used to
out by various methods. This International Standard is limited
compare resins of similar type. As the test results depend very
to measuring certain characteristics relating to the Change in
much on the conditions under which the test is carried out,
temperature as a function of time of a resin-catalyst mix. Using
these conditions are described in detail.
arbitrarily standardized test conditions, these characteristics
allow comparison of similar types of unsaturated Polyester
NOTES
resins.
1 If the method is used to test commercial benzoyl peroxide catalyst,
The results obtained in this test are dependent upon the
the results should be compared with those obtained for the same resin
following test conditions :
using pure benzoyl Peroxide.
2 By agreement between the interested Parties, certain test con-
a) quantity and spatial Parameters of the test Portion
ditions tan be modified : such as the test temperature (temperature of
examined (test-tube diameter, height of resin in the tube);
the thermostatically controlled bath) and the quantity and type of
catalyst System (mixtures of catalysts, combinations of catalysts and
b) Speed of heating the test Portion placed in a
accelerators).
temperature controlled bath. ßor example, the replacement
of water in the bath by another fluid with a lower heat
capacity (glycol, Oil, etc.) leads to slower heating;
2 Brinciple
c)
...