ISO 2028:2015

Synthetic rubber latex — Preparation of dry polymer

ISO 2028:2015 specifies four methods for the isolation of dry polymer from synthetic polymer latices containing anionic surfactants, for the purpose of subsequent testing. Tests to be performed include the determination of the Mooney viscosity, the bound-styrene or acrylonitrile content in the polymer chain or the mill shrinkage.

Latex de caoutchouc synthétique — Préparation du polymère sec

General Information

• Status: Published
• Publication Date: 03-Jun-2015
• ICS: 83.040.10 - Latex and raw rubber
• Technical Committee: ISO/TC 45/SC 3 - Raw materials (including latex) for use in the rubber industry
• Drafting Committee: ISO/TC 45/SC 3 - Raw materials (including latex) for use in the rubber industry
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 01-Jul-2021

Relations

• Revises: ISO 2028:1999 - Synthetic rubber latex — Preparation of dry polymer
• Effective Date: 04-Nov-2015

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 2028
Redline version
compares Fifth edition to
Fourth edition
Synthetic rubber latex — Preparation
of dry polymer
Latex de caoutchouc synthétique — Préparation du polymère sec
Reference number
ISO 2028:redline:2015(E)
©
ISO 2015

---------------------- Page: 1 ----------------------
ISO 2028:redline:2015(E)

IMPORTANT — PLEASE NOTE
This is a mark-up copy and uses the following colour coding:
Text example 1 — indicates added text (in green)
— indicates removed text (in red)
Text example 2
— indicates added graphic figure
— indicates removed graphic figure
1.x . — Heading numbers containg modifications are highlighted in yellow in
the Table of Contents
All changes in this document have yet to reach concensus by vote and as such should only
be used internally for review purposes.
DISCLAIMER
This Redline version provides you with a quick and easy way to compare the main changes
between this edition of the standard and its previous edition. It doesn’t capture all single
changes such as punctuation but highlights the modifications providing customers with
the most valuable information. Therefore it is important to note that this Redline version is
not the official ISO standard and that the users must consult with the clean version of the
standard, which is the official standard, for implementation purposes.
COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 2028:redline:2015(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 2
5 Apparatus . 2
6 Procedure. 3
6.1 General . 3
6.2 Styrene-butadiene (SBR) latices (of less than 55 % solids content) . 3
6.3 Carboxylated (X-SBR and X-NBR) latices . 4
6.4 Nitrile (NBR) latices . 4
6.5 Concentrated latices (more than 55 % solids content) . 4
7 Report . 4
Bibliography . 6
© ISO 2015 – All rights reserved iii

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ISO 2028:redline:2015(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 areThe procedures used to develop this document and those intended for its
further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval
criteria needed for the different types of ISO documents should be noted. This document was drafted
in accordance with the rules given ineditorial rules of the ISO/IEC Directives, Part 32 (see www.iso.
org/directives).
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 Standarddocument
may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent
rights. Details of any patent rights identified during the development of the document will be in the
Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword — Supplementary information.
International Standard ISO 2028 was prepared by Technical CommitteeThe committee responsible for
this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 3, Raw materials (including
latex) for use in the rubber industry.
This fourthfifth edition cancels and replaces the thirdfourth edition (ISO 2028:19891999), which has
been technically revised. with the following modifications.
— Clause 2 “Normative references” has been updated.
— In 4.1, the note giving information on which company may provide polyamine polyelectrolytes, has
been deleted.
iv © ISO 2015 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 2028:redline:2015(E)
Synthetic rubber latex — Preparation of dry polymer
WARNING —  — Persons using this International Standard should be familiar with normal
laboratory practice. This International Standard does not purport to address all of the safety
problems, if any, associated with its use. It is the responsibility of the user to establish appropriate
safety and health practices and to ensure compliance with any national regulatory conditions.
1 Scope
This International Standard specifies four methods for the isolation of dry polymer from synthetic
polymer latices containing anionic surfactants, for the purpose of subsequent testing. Tests that mayto
be performed include the determination of the Mooney viscosity, the bound-styrene or acrylonitrile
content in the polymer chain or the mill shrinkage.
Because of the wide variety of surfactants and stabilizers that are used in the manufacture of synthetic
rubber latices, nothere is not one method is suitable for all latices. The methods given in this International
Standard are suitable for a wide variety of latices, but their applicability shouldis to be confirmed for
individual types. Latices containing non-ionic stabilizers, in particular, may be resistant to coagulation.
These methods are not necessarily suitable, without modification, for latices containing polymers
having high tack.
It should be noted that theThe dry polymer as isolated may contain residual organic acids or their
aluminium salts which may affect the properties of the polymer. This should and which are to be taken
into account when performing analytical tests.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute
provisions of this International Standarddocuments, in whole or in part, are normatively referenced in
this document and are indispensable for its application. 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 belowonly the edition cited applies. For undated references, the
latest edition of the normative document referred to applies. Members of
...

INTERNATIONAL ISO
STANDARD 2028
Fifth edition
2015-06-01
Synthetic rubber latex — Preparation
of dry polymer
Latex de caoutchouc synthétique — Préparation du polymère sec
Reference number
ISO 2028:2015(E)
©
ISO 2015

---------------------- Page: 1 ----------------------
ISO 2028:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 2028:2015(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 1
5 Apparatus . 2
6 Procedure. 3
6.1 General . 3
6.2 Styrene-butadiene (SBR) latices (of less than 55 % solids content) . 3
6.3 Carboxylated (X-SBR and X-NBR) latices . 3
6.4 Nitrile (NBR) latices . 4
6.5 Concentrated latices (more than 55 % solids content) . 4
7 Report . 4
© ISO 2015 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 2028:2015(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.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received (see www.iso.org/patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT), see the following URL: Foreword — Supplementary information.
The committee responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee
SC 3, Raw materials (including latex) for use in the rubber industry.
This fifth edition cancels and replaces the fourth edition (ISO 2028:1999), which has been technically
revised with the following modifications.
— Clause 2 “Normative references” has been updated.
— In 4.1, the note giving information on which company may provide polyamine polyelectrolytes, has
been deleted.
iv © ISO 2015 – All rights reserved

---------------------- Page: 4 ----------------------
INTERNATIONAL STANDARD ISO 2028:2015(E)
Synthetic rubber latex — Preparation of dry polymer
WARNING — Persons using this International Standard should be familiar with normal laboratory
practice. This International Standard does not purport to address all of the safety problems, if
any, associated with its use. It is the responsibility of the user to establish appropriate safety and
health practices and to ensure compliance with any national regulatory conditions.
1 Scope
This International Standard specifies four methods for the isolation of dry polymer from synthetic
polymer latices containing anionic surfactants, for the purpose of subsequent testing. Tests to be
performed include the determination of the Mooney viscosity, the bound-styrene or acrylonitrile content
in the polymer chain or the mill shrinkage.
Because of the wide variety of surfactants and stabilizers used in the manufacture of synthetic rubber
latices, there is not one method suitable for all latices. The methods given in this International Standard
are suitable for a wide variety of latices, but their applicability is to be confirmed for individual types.
Latices containing non-ionic stabilizers, in particular, may be resistant to coagulation.
These methods are not necessarily suitable, without modification, for latices containing polymers
having high tack.
The dry polymer as isolated may contain residual organic acids or their aluminium salts which may affect
the properties of the polymer and which are to be taken into account when performing analytical tests.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of
...