Plastics - Phenolic resins - Determination of reactivity on a B-transformation test plate (ISO 8987:2005)

ISO 8987:2005 specifies methods for the determination of the B-transformation time of phenolic resins at a specified temperature and under specified conditions on a heated test plate.
Two methods are described, each with a different test plate:
Method A -- plate with depressions in the form of segments of spheres;
Method B -- flat plate without depressions.

Kunststoffe - Phenolharze - Bestimmung der Reaktivität auf einer B-Zeit-Prüfplatte (ISO 8987:2005)

Diese Internationale Norm legt Verfahren für die Bestimmung der B-Zeit von Phenolharzen bei festgelegter Temperatur unter festgelegten Bedingungen auf einer beheizten Prüfplatte fest. Zwei Verfahren werden beschrieben, jedes mit einer anderen Prüfplatte:
Verfahren A: Prüfplatte mit Vertiefungen in der Form von Kugelsegmenten;
Verfahren B: flache Prüfplatte ohne Vertiefungen.

Plastiques - Résines phénoliques - Méthodes d'évaluation de la réactivité sur plaque d'essai de transformation au stade B (ISO 8987:2005)

L'ISO 8987:2005 spécifie des méthodes de détermination du temps de transformation au stade B des résines phénoliques, à une température et dans des conditions spécifiées, sur plaque d'essai chauffée.
Deux méthodes sont décrites, chaque méthode étant spécifique à un type de plaque:
Méthode A: plaque avec des empreintes en forme de segment de sphères;Méthode B: plaque plate sans dépressions.

Polimerni materiali – Fenolne smole – Določanje reaktivnosti na preskusni plošči za prehodno stanje B (B-čas) (ISO 8987:2005)

General Information

Status
Published
Publication Date
30-Sep-2005
Withdrawal Date
29-Apr-2006
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
01-Oct-2005
Completion Date
01-Oct-2005
Ref Project
SIST EN ISO 8987:2006 - Plastics - Phenolic resins - Determination of reactivity on a B-transformation test plate (ISO 8987:2005)

Relations

Replaces
EN ISO 8987:1998 - Plastics - Phenolic resins - Determination of reactivity on a B-transformation test plate (ISO 8987:1995)
Effective Date
22-Dec-2008

Overview

EN ISO 8987:2005 is an international standard established by CEN and ISO for evaluating the reactivity of phenolic resins, a type of thermosetting plastic widely used in various industrial applications. This standard outlines precise methods to determine the B-transformation time of phenolic resins by using heated test plates under controlled temperature conditions. The B-transformation time is a critical parameter indicating the curing stage when the resin transitions from a liquid to a gelled state.

The standard improves quality control in phenolic resin production by providing repeatable and reproducible testing procedures, ensuring consistency and reliability in resin performance.

Key Topics

  • Scope and Purpose
    EN ISO 8987:2005 specifies test methods for determining the curing time of phenolic resins at specified temperatures using either of two test plate types.

  • Test Methods

    • Method A: Utilizes a test plate with depressions shaped as spherical segments. Resin is placed into these depressions and stirred regularly to observe the transition to B-stage.
    • Method B: Employs a flat, chromium-plated test plate without depressions. The resin is spread uniformly and stroked with a spatula until it reaches the B-stage.

  • Test Equipment Requirements

    • Thermostatic control with precise temperature regulation (±0.5°C).
    • Test plates-either segmental depression type or flat, both optionally with integral heaters.
    • Timing devices capable of measuring seconds.
    • Tools such as glass rods, spatulas, syringes, and balances for handling resin samples.

  • Testing Procedure and Endpoint Detection
    For both methods, the test starts when resin contacts the plate and ends at the B-transformation point, identified by a change in resin consistency-thread breakage in Method A or gelation in Method B.

  • Reporting and Precision
    Test reports must include sample identification, method used, test temperature, B-transformation time(s), and test date. The standard states repeatability within ±4% and reproducibility within ±10%, ensuring reliable comparisons of resin reactivity.

Applications

EN ISO 8987:2005 is critical in industries where phenolic resins are used, including:

  • Adhesive and composite manufacturing: Monitoring curing times supports product quality and process optimization.
  • Electrical and automotive components: Ensures resin consistency for insulating and structural materials.
  • Surface coatings and laminates: Guarantees controlled curing stages for durability and performance.
  • Material development and research: Enables comparative analysis of resin formulations and catalysts under standardized conditions.

By applying this standard, manufacturers achieve consistent curing behavior, reducing waste and improving material properties critical for end-use reliability.

Related Standards

Professionals working with phenolic resins often refer to complementary standards such as:

  • ISO 4644: Covers general methods for testing phenol-formaldehyde resins.
  • ISO 1784: Pertains to determination of resin viscosity and flow properties.
  • EN ISO 4589: Specifies methods for flame retardancy relevant in phenolic resin applications.
  • ISO/TC 61 series: A broad set of standards for plastics testing, including thermosetting materials.

Integrating EN ISO 8987 with these standards ensures comprehensive evaluation and quality control of phenolic resin materials in industrial processes.

By adhering to EN ISO 8987:2005, manufacturers and researchers can reliably determine the B-transformation time of phenolic resins, enabling optimal processing and performance of phenolic-based plastics across a wide range of applications.

Frequently Asked Questions

EN ISO 8987:2005 is a standard published by the European Committee for Standardization (CEN). Its full title is "Plastics - Phenolic resins - Determination of reactivity on a B-transformation test plate (ISO 8987:2005)". This standard covers: ISO 8987:2005 specifies methods for the determination of the B-transformation time of phenolic resins at a specified temperature and under specified conditions on a heated test plate. Two methods are described, each with a different test plate: Method A -- plate with depressions in the form of segments of spheres; Method B -- flat plate without depressions.

ISO 8987:2005 specifies methods for the determination of the B-transformation time of phenolic resins at a specified temperature and under specified conditions on a heated test plate. Two methods are described, each with a different test plate: Method A -- plate with depressions in the form of segments of spheres; Method B -- flat plate without depressions.

EN ISO 8987:2005 is classified under the following ICS (International Classification for Standards) categories: 83.080.10 - Thermosetting materials. The ICS classification helps identify the subject area and facilitates finding related standards.

EN ISO 8987:2005 has the following relationships with other standards: It is inter standard links to EN ISO 8987:1998. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN ISO 8987:2005 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-januar-2006
1DGRPHãþD
SIST EN ISO 8987:1999
3ROLPHUQLPDWHULDOL±)HQROQHVPROH±'RORþDQMHUHDNWLYQRVWLQDSUHVNXVQLSORãþL
]DSUHKRGQRVWDQMH% %þDV  ,62
Plastics - Phenolic resins - Determination of reactivity on a B-transformation test plate
(ISO 8987:2005)
Kunststoffe - Phenolharze - Bestimmung der Reaktivität auf einer B-Zeit-Prüfplatte (ISO
8987:2005)
Plastiques - Résines phénoliques - Méthodes d'évaluation de la réactivité sur plaque
d'essai de transformation au stade B (ISO 8987:2005)
Ta slovenski standard je istoveten z: EN ISO 8987:2005
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 8987
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 83.080.10 Supersedes EN ISO 8987:1998
English Version
Plastics - Phenolic resins - Determination of reactivity on a B-
transformation test plate (ISO 8987:2005)
Plastiques - Résines phénoliques - Méthodes d'évaluation Kunststoffe - Phenolharze - Bestimmung der Reaktivität auf
de la réactivité sur plaque d'essai de transformation au einer B-Zeit-Prüfplatte (ISO 8987:2005)
stade B (ISO 8987:2005)
This European Standard was approved by CEN on 29 August 2005.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national
standards may be obtained on application to the Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8987:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 8987:2005) has been prepared by Technical Committee ISO/TC 61
"Plastics" in collaboration with Technical Committee CEN/TC 249 "Plastics", the secretariat of
which is held by IBN.
This European Standard shall be given the status of a national standard, either by publication of
an identical text or by endorsement, at the latest by April 2006, and conflicting national
standards shall be withdrawn at the latest by April 2006.

This document supersedes EN ISO 8987:1998.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 8987:2005 has been approved by CEN as EN ISO 8987:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 8987
Third edition
2005-10-01
Plastics — Phenolic resins —
Determination of reactivity on a
B-transformation test plate
Plastiques — Résines phénoliques — Méthodes d'évaluation de la
réactivité sur plaque d'essai de transformation au stade B

Reference number
ISO 8987:2005(E)
©
ISO 2005
ISO 8987:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 8987:2005(E)
Foreword
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(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
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