ISO 24483:2023

Epoxidized natural rubber — Specifications

This document specifies the physical and chemical requirements of epoxidized natural rubber (ENR) based on the epoxidation level of the natural rubber.

Caoutchouc naturel époxydé — Spécifications

General Information

• Status: Published
• Publication Date: 08-Jun-2023
• ICS: 83.060 - 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/WG 4 - Natural rubber
• Current Stage: 6060 - International Standard published
• Start Date: 09-Jun-2023
• Due Date: 23-Jun-2023
• Completion Date: 09-Jun-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 24483
First edition
2023-04
Epoxidized natural rubber —
Specifications
Caoutchouc naturel époxydé — Spécifications
Reference number
ISO 24483:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 24483:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 24483:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material composition .2
5 Grade structure . 2
6 Specification of requirement .2
7 Sampling . 3
8 Packaging. 3
Bibliography . 4
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO 24483:2023(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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 24483:2023(E)
Introduction
Significant developments have taken place in the supply of raw natural rubber, especially in relation to
the number of different grades that are technically specified. The constant viscosity (CV), latex (L) and
gel content (LoV) grades have been added in addition to the initial grades covered in the first edition
of ISO 2000. The development and availability of physical and/or chemically modified grades are now
reported in the technical literature with the aim to expand natural rubber (NR) applications in rubber
products. Demand and acknowledgment of these modified grades grow from year to year. On this note,
it is important to establish a standard reference for the specification related to these modified natural
rubber grades. In this document the emphasis is given to the epoxidized natural rubber (ENR) grade
produced through a chemical modification route on natural rubber.
This document encompasses natural raw rubber specification for ENR produced through a chemical
modification route known as epoxidation reaction. Typically, the most economical epoxidation reaction
route is through the in situ peracid method. Through the process the peracid is formed from hydrogen
peroxide and formic acid. The epoxidation reaction involves with substitution of the NR double bond
structure (C=C) with epoxy ring structure (C-O-C) which later determines the grade of the ENR rubber.
In general, any level of epoxidati
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24483
ISO/TC 45/SC 3
Epoxidised natural rubber —
Secretariat: AFNOR
Specifications
Voting begins on:
2023-01-31
Caoutchouc naturel époxydé — Spécifications
Voting terminates on:
2023-03-28
RECIPIENTS OF THIS DRAFT ARE INVITED TO
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 24483:2023(E)
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN-
DARDS TO WHICH REFERENCE MAY BE MADE IN
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 24483:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 24483
ISO/TC 45/SC 3
Epoxidised natural rubber —
Secretariat: AFNOR
Specifications
Voting begins on:
Caoutchouc naturel époxydé — Spécifications
Voting terminates on:
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 24483:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 24483:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material composition .2
5 Grade structure . 2
6 Specification of requirement .2
7 Sampling . 3
8 Packaging. 3
Bibliography . 4
iii
© ISO 2023 – All rights reserved

---------------------- Page: 3 ----------------------
ISO/FDIS 24483:2023(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 non­governmental, 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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
  © ISO 2023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 24483:2023(E)
Introduction
Significant developments have taken place in the supply of raw natural rubber, especially in relation to
the number of different grades that are technically specified. The constant viscosity (CV), latex (L) and
gel content (LoV) grades have been added in addition to the initial grades covered in the first edition
of ISO 2000. The development and availability of physical and/or chemically modified grades are now
reported in the technical literature with the aim to expand natural rubber (NR) applications in rubber
products. Demand and acknowledgment of these modified grades grow from year to year. On this note,
it is important to establish a standard reference for the specification related to these modified nat
...

ISO/FDIS 24483:20222023(E) Style Definition: Heading 1: Indent: Left: 0 pt, First
line: 0 pt, Tab stops: Not at 21.6 pt
2022-12-22
Style Definition: Heading 2: Font: Bold, Tab stops: Not
at 18 pt
2023-xx
Style Definition: Heading 3: Font: Bold
Style Definition: Heading 4: Font: Bold
ISO TC 45/SC 3/WG 4
Style Definition: Heading 5: Font: Bold
Secretariat: AFNOR
Style Definition: Heading 6: Font: Bold
Style Definition: ANNEX
Epoxidised natural rubber — Specifications
Style Definition: AMEND Terms Heading: Font: Bold
Caoutchouc naturel époxydé — Spécifications
Style Definition: AMEND Heading 1 Unnumbered:
Font: Bold
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: French (Switzerland)
Formatted: Font: Not Bold

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ISO/FDIS 24483:20222023(E)
© ISO 20222023
Commented [eXtyles1]: The reference is to a withdrawn
standard which has been replaced

All rights reserved. Unless otherwise specified, or required in the context of its implementation, no
ISO 20344, Personal protective equipment — Test methods
part of this publication may be reproduced or utilized otherwise in any form or by any means,
for footwear
electronic or mechanical, including photocopying, or posting on the internet or an intranet, without
Formatted: Pattern: Clear
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 20222023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 24483:20222023(E)
Contents
Foreword . iv
Introduction. v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material composition . 2
5 Grade structure . 2
6 Specification of requirement. 3
7 Sampling . 3
8 Packaging . 3
Bibliography . 4
Foreword . iv
Introduction. v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Material composition . 2
5 Grade structure . 2
6 Specification of requirement. 3
7 Sampling . 3
8 Packaging . 3
Bibliography . 4
© ISO 20222023 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO/FDIS 24483:20222023(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/directiveswww.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/patentswww.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 of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the World
Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.htmlwww.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 45, Rubber and rubber products,
Subcommittee SC 3, Raw materials (including latex) for use in the rubber industry.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at
www.iso.org/members.htmlwww.iso.org/members.html.
iv © ISO 20222023 – All rights reserved

---------------------- Page: 4 ----------------------
ISO/FDIS 24483:20222023(E)
Introduction
Significant developments have taken place in the supply of raw natural rubber, especially in relation to
the number of different grades that are technically specified. The constant viscosity (CV), latex (L) and
gel content (LoV) grades have been added in addition to the initial grades covered in the first edition of
ISO 2000. The development and availability of physical and/or chemically modified grades are now
Formatted: Pattern: Clear
reported in the technical literature with the aim to expand natural rubber (NR) applications in rubber
Formatted: Pattern: Clear
products. Demand and acknowledgment of these modified grades grow from year to year. On this note, it
is important to establish a standard reference for the specification related to these modified natural
rubber grades. In this document the emphasis is given to the epoxidised natural rubber (ENR) grade
produced through a chemical modification route on natural rubber.
This document encompasses natural raw rubber specification for ENR produced through a chemical
modification route known as epoxidation reaction. Typically, the most economical epoxidation reaction
route is through the in- situ peracid method. Through the process the peracid is formed from hydrogen
peroxide and formic acid. The epoxidation reaction involves with substitution of the NR double bond
structure (C=C) with epoxy ring structure (C-O-C) which later determines the grade of the ENR rubber.
In general, any level of epoxidation can be produced according to the specific formulation. However,
currently only two grades (25 mol% and 50 mol%) are available commercially. Different level of
epoxidation in the ENR rubber specifies its usage in rubber product applications.
...