EN ISO 308:1997

Plastics - Phenolic moulding materials - Determination of acetone-soluble matter (apparent resin content of material in the unmoulded state) (ISO 308:1994)

Specification of a gravimetric method for the determination of the amount of matter that can be extracted by boiling acetone from a sample of finely divided phenolic moulding material. The extract is dried under controlled conditions and the mass of residue determined by weighing. The amount of acetone soluble matter (apparent resin content) is expressed as percentage by mass of the original test portion.

Kunststoffe - Phenolharz-Formmassen - Bestimmung des acetonlöslichen Anteils (Scheinbarer Harzgehalt von Formmassen in unverarbeitetem Zustand) (ISO 308:1994)

Diese Internationale Norm beschreibt ein gravimetrisches Verfahren zur Bestimmung des Anteils von Bestandteilen, die sich aus feinteiligen Phenolharz- Formmassen-Proben durch Aceton mit einer Temperatur nahe dem Siedepunkt extrahieren lassen. Das Verfahren kann nur auf Formmassen auf Novolakbasis angewandt werden, nicht jedoch auf Resolharz-Formmassen, da dieser Harztyp möglicherweise nicht vollständig acetonlöslich ist.

Plastiques - Matières à mouler à base de phénoplastes - Détermination des matières solubles dans l'acétone (teneur apparente en résine des matières à l'état non moulé) (ISO 308:1994)

Polimerni materiali - Materiali za oblikovanje na osnovi fenolnih smol - Določevanje topnega v acetonu (navidezni delež smole v neoblikovanem stanju) (ISO 308:1994)

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 308:2000 - Plastics - Phenolic moulding materials - Determination of acetone-soluble matter (apparent resin content of material in the unmoulded state) (ISO 308:1994)

Overview

EN ISO 308:1997 is an international standard specifying a gravimetric method for determining the amount of acetone-soluble matter in finely divided phenolic moulding materials. This content, also known as the apparent resin content of the unmoulded material, is critical in assessing the quality and composition of phenolic moulding compounds used widely in thermosetting plastics industries.

The method employs extraction with boiling acetone to dissolve the acetone-soluble fraction, followed by controlled drying and weighing of the residue. The result is expressed as a percentage by mass relative to the original test sample. This standard is essential for ensuring consistent material properties and compliance with quality specifications in industrial production.

Key Topics

• Scope and Applicability
  Applies to phenolic moulding materials based on novolak resins, excluding resol-based resins due to solubility limitations.

• Terminology and Definitions
  Aligns with ISO 472 and ISO 800 for definitions related to phenolic moulding compounds, novolak, and resol resins.

• Sample Preparation
  Reduction of coarse materials to a powder or small particles (not exceeding 1.5 mm in thickness and 5 mm in length) while avoiding overheating or resin loss.

• Gravimetric Extraction Process
  Use of hot acetone boiling extraction via Soxhlet or equivalent apparatus, ensuring the sample is fully exposed to solvent vapors.

• Weighing and Drying Procedures
  Optimized drying of the acetone extract residue under vacuum over sulfuric acid desiccant at room temperature to ensure reliable mass measurement.

• Calculation of Acetone-Soluble Matter
  Expressed as a percentage of acetone-soluble content relative to the dried mass of the original test portion; average of two test replicates with a maximum allowed difference of 2%.

• Test Reporting
  Comprehensive report contents include reference to the standard, sample identification, preparation method, results for each test portion, average values, and test date.

Applications

• Quality Control in Industrial Manufacturing
  Ensures that phenolic moulding materials meet required resin content specifications, crucial for predictable mechanical properties and moulding behavior.

• Material Certification and Compliance
  Supports verification of raw material consistency for manufacturers and suppliers adhering to industry standards in automotive, electronics, and construction sectors.

• Research and Development
  Enables precise quantification of resin content during formulation adjustments or new phenolic compound development.

• Failure Analysis and Troubleshooting
  Identifies deviations in resin content that may affect cure characteristics or final product performance.

Related Standards

• ISO 472: Plastics - Vocabulary
  Provides essential definitions used in phenolic moulding material characterization.

• ISO 800: Plastics - Specifications for Thermosetting Moulding Materials
  Details classification and specification parameters relevant to phenolic resins used in moulding.

• Industry-Specific Standards for Thermosetting Plastics
  Complementary standards addressing test methods, mechanical properties, and chemical resistance of phenolic-based components.

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Keywords: EN ISO 308, phenolic moulding materials, acetone-soluble matter, gravimetric method, apparent resin content, novolak resin, thermosetting plastics, Soxhlet extraction, phenolic resin testing, plastics quality control, polymer testing standards, acetone extraction method.

Standards Content (Sample)

SLOVENSKI STANDARD
01-maj-2000
3ROLPHUQLPDWHULDOL0DWHULDOL]DREOLNRYDQMHQDRVQRYLIHQROQLKVPRO
'RORþHYDQMHWRSQHJDYDFHWRQXQDYLGH]QLGHOHåVPROHYQHREOLNRYDQHPVWDQMX
,62
Plastics - Phenolic moulding materials - Determination of acetone-soluble matter
(apparent resin content of material in the unmoulded state) (ISO 308:1994)
Kunststoffe - Phenolharz-Formmassen - Bestimmung des acetonlöslichen Anteils
(Scheinbarer Harzgehalt von Formmassen in unverarbeitetem Zustand) (ISO 308:1994)
Plastiques - Matieres a mouler a base de phénoplastes - Détermination des matieres
solubles dans l'acétone (teneur apparente en résine des matieres a l'état non moulé)
(ISO 308:1994)
Ta slovenski standard je istoveten z: EN ISO 308:1997
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 308
Third edition
1994-10-01
Plastics - Phenolic moulding materials -
Determination of acetone-soluble matter
(apparent resin ’content of material in the
unmoulded state)
Plas tiques - Mati&res 2 mouler 2 base de phknoplastes -
Determination des ma tieres solubles dans I ’ac&one (teneur apparen te en
rksine des matieres A Etat non mouk)
Reference number
ISO 3087 994(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. Esch 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.
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 ISO 308 was prepared by Technical Committee
lSO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials.
This third edition cancels and replaces the second edition
(ISO 308:1981), of which it constitutes a minor revision.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronie or mechanical, including photocopying and
microfilm, without Permission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-l 211 Geneve 20 l Switzerland
Printed in Switzerland
INTERNATIONAL STANDARD 0 ISO ISO 308:1994(E)
Plastics - Phenolic moulding materials -
Determination of acetone-soluble matter (apparent
resin content of material in the unmoulded state)
1 Scope 3 Definitions
For the purposes of this International Standard, the
This International Standard specifies a gravimetric
definitions of moulding materials based on phenolic
method for the determination of the amount of matter
resins, novolak resins and resol resins given in
that tan be extracted by acetone, at a temperature
ISO 472 and ISO 800 apply.
near its boiling Point, from a Sample of finely divided
phenolic moulding material. The method applies only
to moulding materials based upon novolak resins and
4 Principle
not to those based upon resols, as the latter type of
resin may not be completely soluble in acetone.
The acetone-soluble matter is extracted, using hot
acetone, from a finely divided test Portion. The extract
In this International Standard, the amount of acetone-
is dried under controlled conditions and weighed.
soluble matter is reported as the apparent resin con-
tent because, although the extract consists mainly of
5 Reagent
phenolic resin and hexamine, other acetone-soluble
components such as Iubricants and colorants or na-
tural resins from the filler are normally also present 5.1 Acetone, pure.
and will therefore be reported as resin.
6 Apparatus
6.1 Reduction device, for reducing coarse materials
to a finer state of division.
2 Normative references
6.2 Balance, accurate to 1 mg.
The following Standards contain provisions which,
through reference in this text, constitute provisions
6.3 Extraction apparatus, of the t
...