ISO 308:1994

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

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.

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)

Polimerni materiali - Materiali za oblikovanje na osnovi fenolnih smol - Določanje topnega v acetonu (navidezna vsebnost smole v neoblikovanem materialu)

General Information

• Status: Published
• Publication Date: 28-Sep-1994
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: ISO/TC 61/SC 12 - Thermosetting materials
• Drafting Committee: ISO/TC 61/SC 12 - Thermosetting materials
• Current Stage: 9093 - International Standard confirmed
• Start Date: 05-Jun-2026
• Completion Date: 06-Jun-2026
• Ref Project: SIST ISO 308:1996 - Plastics -- Phenolic moulding materials -- Determination of acetone-soluble matter (apparent resin content of material in the unmoulded state)

Relations

• Revises: ISO 308:1981 - Plastics — Phenolic moulding materials — Determination of acetone-soluble matter (apparent resin content of material in the unmoulded state)
• Effective Date: 15-Apr-2008

Overview

ISO 308:1994 specifies a gravimetric method for determining the acetone-soluble matter in phenolic moulding materials. This test method measures the apparent resin content of unmoulded phenolic materials by extracting soluble material with boiling acetone, followed by drying and gravimetric analysis. The result is expressed as a percentage by mass of the original test portion. This international standard is essential for quality control, material specification, and research in the plastics and thermosetting materials industries. Developed by ISO Technical Committee TC 61, Subcommittee SC 12, the standard aims to ensure reliable, reproducible measurement across laboratories and industries.

Key Topics

• Gravimetric Analysis: The standard establishes a precise process involving the extraction of acetone-soluble content using hot acetone and subsequent weighing of the residue.
• Material Applicability: Applies primarily to phenolic moulding materials based on novolak resins and not recommended for resol resins, which may not be completely soluble in acetone.
• Sample Preparation: Emphasizes careful reduction of moulding materials to a finely divided state without overheating or excessive powdering to avoid loss or agglomeration.
• Extraction Apparatus: Details use of specific extraction equipment such as Soxhlet apparatus and requirements for clean, acetone-free materials.
• Calculation and Reporting: Defines the formula for calculating the apparent resin content, requiring the arithmetic mean of duplicate test results and thorough documentation in test reports.
• Controlled Conditions: Specifies conditions for drying, weighing, and extraction to ensure accuracy and repeatability.

Applications

ISO 308:1994 is widely used in various sectors where phenolic moulding materials play a critical role. Typical applications include:

• Quality Control in Manufacturing: Manufacturers of phenolic resins and thermoset moulding compounds employ this method to verify material specifications, consistency, and batch homogeneity.
• Product Development and Optimization: Research and development teams assess resin composition to optimize performance characteristics such as strength, thermal resistance, and electrical insulation properties.
• Material Certification and Compliance: Ensures materials meet industry and customer standards for resin content by providing a standardized measurement procedure.
• Comparison of Suppliers: Allows procurement and technical teams to objectively compare materials from different vendors based on acetone-soluble resin content.
• Failure Analysis: Analytical laboratories use this standard to investigate issues related to incomplete curing, filler content, or contamination in phenolic-based components.

Related Standards

Professionals working with ISO 308:1994 may also reference the following standards for a comprehensive approach:

• ISO 472: Plastics - Vocabulary - Provides essential definitions related to plastics and moulding compounds.
• ISO 800: Plastics - Phenolic Moulding Materials – Specification - Details requirements and classification for phenoplast materials.
• ISO 175: Plastics - Methods for testing resistance to chemicals - Supports broader chemical resistance testing.
• ISO 11357 Series: Plastics - Differential Scanning Calorimetry (DSC) - Common for thermal analysis of plastics and thermosets.

Keywords: ISO 308, phenolic moulding materials, acetone-soluble matter, resin content determination, plastics characterization, gravimetric method, thermosetting materials, novolak resins, international standards, acetone extraction, quality control, chemical analysis, plastics industry.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-1996
3ROLPHUQLPDWHULDOL0DWHULDOL]DREOLNRYDQMHQDRVQRYLIHQROQLKVPRO'RORþDQMH
WRSQHJDYDFHWRQXQDYLGH]QDYVHEQRVWVPROHYQHREOLNRYDQHPPDWHULDOX
Plastics -- Phenolic moulding materials -- Determination of acetone-soluble matter
(apparent resin content of material in the unmoulded state)
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)
Ta slovenski standard je istoveten z: ISO 308:1994
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 type shown in
of this International Standard. At the time of publi-
figure 1. (A glass filter crucible may be used instead
cation, the editions indicated were valid. All Standards
of a
...

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 type shown in
of this International Standard. At the time of publi-
figure 1. (A glass filter crucible may be used instead
cation, the editions indicated were valid. All Standards
of a Single-thickness extraction thimble.)
are subject to revision, and Parties to agreements
based on this International Standard are encouraged The Single-thickness extraction thimble, which shall
to investigate the possibility of applying the most re- be free from acetone-soluble matter, together with a
cent editions of the Standards indicated below. loose plug of cotton wool, if used, which shall also be
Members of IEC and ISO maintain registers of cur- free from acetone-soluble matter, shall be dried for
rently valid International Standards.
2 h in the oven (6.4) at approximately 105 “C and
stored in the desiccator (6.5) until required.
ISO 4723 988, Plastics -
...

NORME IS0
INTERNATIONALE
Troisikme bdition
1994-l o-01
Plastiques - Mat&es 6 mouler 6 base de
ph6noplastes - Dhtermination des
mat&es solubles dans I’ac&one (teneur
apparente en r6sine des mat&es & Mat
non moul6)
P/as tics - Phenolic moulding materials - Determination of
acetone-soluble matter (apparent resin con tent of material in the
unmoulded state)
=-!!I Numho de rkfbence
IS0 308: 1994(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation
mondiale d’organismes nationaux de normalisation (comites membres de
I’ISO). L’elaboration des Normes internationales est en general confide aux
comites techniques de I’ISO. Chaque comite membre interesse par une
etude a le droit de faire partie du comite technique tree a cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent egalement aux travaux. L’ISO colla-
bore etroitement avec la Commission electrotechnique internationale (CEI)
en ce qui concerne la normalisation electrotechnique.
Les projets de Normes internationales adopt& par les comites techniques
sont soumis aux comites membres pour vote. Leur publication comme
Normes internationales requiert I’approbation de 75 % au moins des co-
mites membres votants.
La Norme internationale IS0 308 a ete elaboree par le comite technique
P/as tiques, sous-comite SC 12, Matkiaux
ISO/TC 61,
thermodurcissables.
Cette troisieme edition annule et remplace la deuxieme edition
(IS0 308:1981), dont elle constitue une revision mineure.
0 IS0 1994
Droits de reproduction reserves. Sauf prescription differente, aucune partie de cette publi-
cation ne peut etre reproduite ni utilisee sous quelque forme que ce soit et par aucun pro-
cede, electronique ou mecanique, y compris la photocopie et les microfilms, sans I’accord
ecrit de I’editeur.
Organisation internationale de normalisation
Case Postale 56 = CH-1211 Geneve 20 e Suisse
Imprime en Suisse
IS0 308:1994(F)
NORME INTERNATIONALE 0 IS0
Plastiques - Matihes B mouler & base de
ph6noplastes - Dbtermination des matikres solubles
dans l’ac&one (teneur apparente en rkine des
matihres & Mat non moul6)
IS0 472: 1988, Plastiques - Vocabulaire.
1 Domaine d’application
IS0 800:1992, Plastiques - Mat&es d mauler ph&-
La presente Norme internationale prescrit une me-
noplastes - Spkcification.
thode gravimetrique pour la determination de la te-
neur en mat&es pouvant etre extraites par l’acetone,
a une temperature voisine de son point d’ebullition,
3 Dbfinitions
d’un echantillon finement broye d’une mat&e a
mouler a base de phenoplastes. La methode est ap-
Pour les besoins de la presente Norme internationale,
plicable uniquement aux matieres a mouler a base de
les definitions des matieres a mouler a base de phe-
resines novolaques et non a celles a base de resols,
noplastes, &sines novolaques et resines resols, don-
car ce dernier type de resine peut ne pas etre com-
nees dans I’ISO 472 et I’ISO 800, s’appliquent.
pletement soluble dans I’acetone.
Dans la presente Norme internationale, la teneur en
4 Principe
matieres solubles dans l’acetone est consideree
comme &ant la teneur apparente en resine, car, bien
Les mat&-es solubles dans I’acetone d’une prise
que I’extrait acetonique soit compose principalement
d’essai reduite a Mat de poudre sont extraites par
de resine phenoplastes et d’hexamine, il contient
l’acetone a chaud. L’extrait est s&he dans des
egalement d’autres composes solubles dans I’ace-
conditions determinees et l’extrait set est pese.
tone qui y sont normalement presents, tels que des
lubrifiants, des colorants ou des resines naturelles
5 Produit chimique
apportees par les charges.
5.1 A&one, pure.
2 Rbfbrences normatives
6 Appareillage
Les normes suivantes contiennent des dispositions
qui, par suite de la reference qui en est faite, consti-
tuent des dispositions valables pour la presente
6.1 Dispositif de rbduction, permettant de reduire
Norme internationale. Au moment de la publication,
la matiere brute a un etat de division plus fin.
les editions indiquees etaient en vigueur. Toute
norme est sujette a revision et les parties prenantes
6.2 Balance, precise a 1 mg.
des accords fond& sur la presente Norme internatio-
nale sont invitees a rechercher la possibilite d’appli-
6.3 Appareil d’extraction, du modele represente a
quer les editions les plus recentes des normes
la figure 1. (Un creuset filtrant a plaque en verre fritte
indiquees ci-apres. Les membres de la CEI et de I’ISO
peut remplacer la cartouche d’extraction a simple
possedent le registre des Normes internationales en
epaisseur.)
vigueur a un moment donne.
IS0 308:1994(F) 0 IS0
La cartouche d’extraction a simple epaisseur, qui doit
II est egalement permis d’utiliser un appareil du type
etre exempte de mat&e soluble dans I’acetone, ain
...

NORME IS0
INTERNATIONALE
Troisikme bdition
1994-l o-01
Plastiques - Mat&es 6 mouler 6 base de
ph6noplastes - Dhtermination des
mat&es solubles dans I’ac&one (teneur
apparente en r6sine des mat&es & Mat
non moul6)
P/as tics - Phenolic moulding materials - Determination of
acetone-soluble matter (apparent resin con tent of material in the
unmoulded state)
=-!!I Numho de rkfbence
IS0 308: 1994(F)
Avant-propos
L’ISO (Organisation internationale de normalisation) est une federation
mondiale d’organismes nationaux de normalisation (comites membres de
I’ISO). L’elaboration des Normes internationales est en general confide aux
comites techniques de I’ISO. Chaque comite membre interesse par une
etude a le droit de faire partie du comite technique tree a cet effet. Les
organisations internationales, gouvernementales et non gouvernemen-
tales, en liaison avec I’ISO participent egalement aux travaux. L’ISO colla-
bore etroitement avec la Commission electrotechnique internationale (CEI)
en ce qui concerne la normalisation electrotechnique.
Les projets de Normes internationales adopt& par les comites techniques
sont soumis aux comites membres pour vote. Leur publication comme
Normes internationales requiert I’approbation de 75 % au moins des co-
mites membres votants.
La Norme internationale IS0 308 a ete elaboree par le comite technique
P/as tiques, sous-comite SC 12, Matkiaux
ISO/TC 61,
thermodurcissables.
Cette troisieme edition annule et remplace la deuxieme edition
(IS0 308:1981), dont elle constitue une revision mineure.
0 IS0 1994
Droits de reproduction reserves. Sauf prescription differente, aucune partie de cette publi-
cation ne peut etre reproduite ni utilisee sous quelque forme que ce soit et par aucun pro-
cede, electronique ou mecanique, y compris la photocopie et les microfilms, sans I’accord
ecrit de I’editeur.
Organisation internationale de normalisation
Case Postale 56 = CH-1211 Geneve 20 e Suisse
Imprime en Suisse
IS0 308:1994(F)
NORME INTERNATIONALE 0 IS0
Plastiques - Matihes B mouler & base de
ph6noplastes - Dbtermination des matikres solubles
dans l’ac&one (teneur apparente en rkine des
matihres & Mat non moul6)
IS0 472: 1988, Plastiques - Vocabulaire.
1 Domaine d’application
IS0 800:1992, Plastiques - Mat&es d mauler ph&-
La presente Norme internationale prescrit une me-
noplastes - Spkcification.
thode gravimetrique pour la determination de la te-
neur en mat&es pouvant etre extraites par l’acetone,
a une temperature voisine de son point d’ebullition,
3 Dbfinitions
d’un echantillon finement broye d’une mat&e a
mouler a base de phenoplastes. La methode est ap-
Pour les besoins de la presente Norme internationale,
plicable uniquement aux matieres a mouler a base de
les definitions des matieres a mouler a base de phe-
resines novolaques et non a celles a base de resols,
noplastes, &sines novolaques et resines resols, don-
car ce dernier type de resine peut ne pas etre com-
nees dans I’ISO 472 et I’ISO 800, s’appliquent.
pletement soluble dans I’acetone.
Dans la presente Norme internationale, la teneur en
4 Principe
matieres solubles dans l’acetone est consideree
comme &ant la teneur apparente en resine, car, bien
Les mat&-es solubles dans I’acetone d’une prise
que I’extrait acetonique soit compose principalement
d’essai reduite a Mat de poudre sont extraites par
de resine phenoplastes et d’hexamine, il contient
l’acetone a chaud. L’extrait est s&he dans des
egalement d’autres composes solubles dans I’ace-
conditions determinees et l’extrait set est pese.
tone qui y sont normalement presents, tels que des
lubrifiants, des colorants ou des resines naturelles
5 Produit chimique
apportees par les charges.
5.1 A&one, pure.
2 Rbfbrences normatives
6 Appareillage
Les normes suivantes contiennent des dispositions
qui, par suite de la reference qui en est faite, consti-
tuent des dispositions valables pour la presente
6.1 Dispositif de rbduction, permettant de reduire
Norme internationale. Au moment de la publication,
la matiere brute a un etat de division plus fin.
les editions indiquees etaient en vigueur. Toute
norme est sujette a revision et les parties prenantes
6.2 Balance, precise a 1 mg.
des accords fond& sur la presente Norme internatio-
nale sont invitees a rechercher la possibilite d’appli-
6.3 Appareil d’extraction, du modele represente a
quer les editions les plus recentes des normes
la figure 1. (Un creuset filtrant a plaque en verre fritte
indiquees ci-apres. Les membres de la CEI et de I’ISO
peut remplacer la cartouche d’extraction a simple
possedent le registre des Normes internationales en
epaisseur.)
vigueur a un moment donne.
IS0 308:1994(F) 0 IS0
La cartouche d’extraction a simple epaisseur, qui doit
II est egalement permis d’utiliser un appareil du type
etre exempte de mat&e soluble dans I’acetone, ain
...