EN ISO 4629-2:2016
(Main)Binders for paints and varnishes - Determination of hydroxyl value - Part 2: Titrimetric method using a catalyst (ISO 4629-2:2016)
Binders for paints and varnishes - Determination of hydroxyl value - Part 2: Titrimetric method using a catalyst (ISO 4629-2:2016)
ISO 4629-2:2016 specifies a titrimetric method for determining the hydroxyl value of resins, binders for paints and varnishes, primary alcohols, glycols and fats. Whether it can be applied for hydro carboxylic acids, phenolic hydroxyl groups, polyols such as trimethyl propane and substances containing aromatic groups have been activated for Friedel-Crafts acylation shall be decided on case-to-case basis.
Under the right conditions, the method is also applicable for determining the hydroxyl value of castor oil and its derivatives.
Bindemittel für Beschichtungsstoffe - Bestimmung der Hydroxylzahl - Teil 2: Titrimetrisches Verfahren mit Katalysator (ISO 4629-2:2016)
Dieser Teil von ISO 4629 legt ein titrimetrisches Verfahren zum Bestimmen der Hydroxylzahl von Harzen, Bindemitteln für Beschichtungsstoffe, primären Alkoholen, Glykolen und Fetten fest. Die Anwendbarkeit des Verfahrens für Hydroxysäuren, phenolische Hydroxylgruppen, einige Polyole, wie z. B. Trimethylolpropan, und für Substanzen mit aromatischen Gruppierungen, die für die Friedel-Crafts-Acylierung aktiviert sind, muss im Einzelfall geprüft werden.
Bei Anpassung der Bedingungen ist das Verfahren auch zum Bestimmen der Hydroxylzahl von Rizinusöl und seiner Derivate geeignet.
Liants pour peintures et vernis - Détermination de l'indice d'hydroxyle - Partie 2: Méthode titrimétrique utilisant un catalyseur (ISO 4629-2:2016)
ISO 4629-2:2016 spécifie une méthode titrimétrique permettant de déterminer l'indice d'hydroxyle des résines, des liants pour peintures et vernis, des alcools primaires, des glycols et des matières grasses. Son applicabilité pour les acides hydrocarboxyliques, les groupes hydroxyle phénoliques, les polyols tels que le triméthylpropane et les substances contenant des groupes aromatiques activés pour une acylation de Friedel-Crafts, doit être déterminée au cas par cas.
Dans les conditions appropriées, la méthode est également applicable pour déterminer l'indice d'hydroxyle de l'huile de ricin et de ses dérivés.
Veziva za barve in lake - Ugotavljanje bazičnosti - 2. del: Titrimetrijska metoda z uporabo katalizatorja (ISO 4629-2:2016)
Ta mednarodni standard določa titrimetrično metodo za določane hidroksilne vrednosti smol, veziv za barve in lake, primarne alkohole, glikole in maščobe. Ali ga je mogoče uporabiti za hidrokarboksilne kisline, fenolne hidroksilne skupine, poliole, kot je trimetil propan, in snovi, ki vsebujejo aromatične skupine, ki so bile aktivirane za Friedel-Craftsovo aciliranje, je treba določiti za vsak primer posebej. Pod pravimi pogoji se metoda uporablja tudi za določanje hidroksilne vrednosti ricinusovega olja in njegovih derivatov.
General Information
Overview
EN ISO 4629-2:2016 - "Binders for paints and varnishes - Determination of hydroxyl value - Part 2: Titrimetric method using a catalyst" - is a CEN-endorsed ISO method for measuring the hydroxyl value of resins, binders, primary alcohols, glycols and fats used in paints and varnishes. The standard specifies a titrimetric acetylation procedure (acetic anhydride) with a catalyst (4‑N‑dimethylaminopyridine in N‑methylpyrrolidone) and back-titration of excess reagent with alcoholic potassium hydroxide. It is part of ISO 4629 (Part 1 covers a non‑catalyzed pyridine method).
Key topics and technical requirements
- Scope: Intended for resins, binders, primary alcohols, glycols, fats; applicability to hydroxycarboxylic acids, phenolic OH, certain polyols and Friedel–Crafts‑activated aromatics is decided case-by-case. Castor oil and derivatives can be analyzed under appropriate conditions.
- Principle: Acetylation of hydroxyl groups with acetic anhydride; excess anhydride titrated with standardized alcoholic KOH to calculate hydroxyl value (mg KOH/g).
- Reagents: N‑methylpyrrolidone (NMP) solvent, 10% acetic anhydride in NMP (acetylating reagent), 1% DMAP catalyst in NMP, 0.5 mol/L KOH in methanol (standardized), methyl ethyl ketone (rinse), thymolphthalein/phenolphthalein indicators.
- Apparatus & procedure essentials: Analytical balance, conical flask, magnetic stirrer/hot plate, automatic titrator or burette. Determinations in triplicate; sample mass calculated from expected hydroxyl value (m = 300 / HV_expected). Typical reaction times: at least 15 min (ambient) - secondary OH groups require ≥60 min reaction and ≥30 min hydrolysis. End point detected colorimetrically or potentiometrically.
- Quality: References to reagent purity (ISO 3696 water), standardization of KOH, blank tests and acid‑value determination are required. Precision and reporting requirements are defined.
Applications and users
- Who uses it: Quality control and R&D laboratories in coatings and paints manufacturers, resin and binder producers, raw material suppliers, contract testing labs, and regulatory/testing bodies.
- Practical uses:
- Determining hydroxyl functionality for stoichiometry in crosslinking agents (isocyanates, blocked isocyanates, melamines).
- Characterizing polyols, glycols and fatty binders for formulation and performance prediction.
- QC batch release and incoming raw material verification.
- Advantages (compared to non‑catalyzed method): less hazardous solvents, lower solvent consumption, faster reactions, clearer titration end point and improved solubility for polyols.
Related standards
- ISO 4629-1 (titrimetric method without catalyst)
- ISO 660 (acid value for fats & oils)
- ISO 2114 (partial and total acid value)
- ISO 3696 (water for analytical use)
- ISO 4618 (paints & varnishes terms)
- ISO 15528 (sampling of paints, varnishes, raw materials)
Keywords: EN ISO 4629-2:2016, hydroxyl value determination, titrimetric method, binders for paints and varnishes, acetylation, DMAP catalyst, N‑methylpyrrolidone.
Frequently Asked Questions
EN ISO 4629-2:2016 is a standard published by the European Committee for Standardization (CEN). Its full title is "Binders for paints and varnishes - Determination of hydroxyl value - Part 2: Titrimetric method using a catalyst (ISO 4629-2:2016)". This standard covers: ISO 4629-2:2016 specifies a titrimetric method for determining the hydroxyl value of resins, binders for paints and varnishes, primary alcohols, glycols and fats. Whether it can be applied for hydro carboxylic acids, phenolic hydroxyl groups, polyols such as trimethyl propane and substances containing aromatic groups have been activated for Friedel-Crafts acylation shall be decided on case-to-case basis. Under the right conditions, the method is also applicable for determining the hydroxyl value of castor oil and its derivatives.
ISO 4629-2:2016 specifies a titrimetric method for determining the hydroxyl value of resins, binders for paints and varnishes, primary alcohols, glycols and fats. Whether it can be applied for hydro carboxylic acids, phenolic hydroxyl groups, polyols such as trimethyl propane and substances containing aromatic groups have been activated for Friedel-Crafts acylation shall be decided on case-to-case basis. Under the right conditions, the method is also applicable for determining the hydroxyl value of castor oil and its derivatives.
EN ISO 4629-2:2016 is classified under the following ICS (International Classification for Standards) categories: 87.060.20 - Binders. The ICS classification helps identify the subject area and facilitates finding related standards.
You can purchase EN ISO 4629-2:2016 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of CEN standards.
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2016
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Binders for paints and varnishes - Determination of hydroxyl value - Part 2: Titrimetric
method using a catalyst (ISO 4629-2:2016)
Bindemittel für Beschichtungsstoffe - Bestimmung der Hydroxylzahl - Teil 2:
Titrimetrisches Verfahren mit Katalysator (ISO 4629-2:2016)
Liants pour peintures et vernis - Détermination de l'indice d'hydroxyle - Partie 2: Méthode
utilisant d'un catalyseur (ISO 4629-2:2016)
Ta slovenski standard je istoveten z: EN ISO 4629-2:2016
ICS:
87.060.20 Veziva Binders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 4629-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2016
EUROPÄISCHE NORM
ICS 87.060.20
English Version
Binders for paints and varnishes - Determination of
hydroxyl value - Part 2: Titrimetric method using a catalyst
(ISO 4629-2:2016)
Liants pour peintures et vernis - Détermination de Bindemittel für Beschichtungsstoffe - Bestimmung der
l'indice d'hydroxyle - Partie 2: Méthode titrimétrique Hydroxylzahl - Teil 2: Verfahren mit Katalysator (ISO
utilisant un catalyseur (ISO 4629-2:2016) 4629-2:2016)
This European Standard was approved by CEN on 19 May 2016.
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 CEN-CENELEC Management Centre 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 CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2016 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 4629-2:2016 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 4629-2:2016) has been prepared by Technical Committee ISO/TC 35 “Paints
and varnishes” in collaboration with Technical Committee CEN/TC 139 “Paints and varnishes” the
secretariat of which is held by DIN.
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 December 2016, and conflicting national standards
shall be withdrawn at the latest by December 2016.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 4629-2:2016 has been approved by CEN as EN ISO 4629-2:2016 without any
modification.
INTERNATIONAL ISO
STANDARD 4629-2
First edition
2016-06-01
Binders for paints and varnishes —
Determination of hydroxyl value —
Part 2:
Titrimetric method using a catalyst
Liants pour peintures et vernis — Détermination de l’indice
d’hydroxyle —
Partie 2: Méthode titrimétrique utilisant un catalyseur
Reference number
ISO 4629-2:2016(E)
©
ISO 2016
ISO 4629-2:2016(E)
© ISO 2016, 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
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ii © ISO 2016 – All rights reserved
ISO 4629-2:2016(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Reagents . 2
6 Apparatus . 2
7 Sampling . 3
8 Procedure. 3
8.1 Number of determinations . 3
8.2 Test portion . 3
8.3 Determination . 3
8.4 Blank test . 4
8.5 Determination of acid value . 4
9 Expression of results . 4
10 Precision . 4
10.1 Repeatability . 4
10.2 Reproducibility . 4
11 Test report . 5
Bibliography . 6
ISO 4629-2:2016(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 al
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기사 제목: EN ISO 4629-2:2016 - 페인트 및 액체토양용 계면 활성제 - 하이드록실 값의 결정 - 제 2부: 촉매를 사용한 적정법 (ISO 4629-2:2016) 기사 내용: ISO 4629-2:2016은 수지, 페인트 및 액체토양용 계면 활성제, 일차 알코올, 글리콜 및 지방의 하이드록실 값을 결정하기 위한 촉매를 사용한 적정법을 정의한다. 그러나 이 방법이 탄소 수산화물산, 페놀 하이드록실 기질, 트리메틸프로판과 같은 고분자 알코올, 그리고 프리델-크라프트 아실화 반응에 의해 활성화된 방향족 기질을 포함한 물질에 적용될 수 있는지는 사례별로 결정해야 한다. 적절한 조건 하에서, 이 방법은 캐스터 오일 및 그 변형체의 하이드록실 값을 결정하는 데에도 적용할 수 있다.
記事タイトル: EN ISO 4629-2:2016 - 塗料およびニス用結合剤 - 水酸基価の測定 - 第2部:触媒を使用した滴定法 (ISO 4629-2:2016) 記事内容: ISO 4629-2:2016は、樹脂、塗料およびニス用結合剤、一次アルコール、グリコール、脂肪の水酸基価を測定するための触媒を使用した滴定法を規定しています。ただし、この方法が炭化水素酸、フェノール水酸基、トリメチルプロパンなどのポリオール、およびフリーデルクラフツアシル化で活性化された芳香族基を含む物質に適用可能かどうかは個別のケースごとに判断する必要があります。 適切な条件下では、この方法はキャスターオイルおよびその誘導体の水酸基価を測定するのにも適用できます。
The article discusses a titrimetric method called EN ISO 4629-2:2016 for determining the hydroxyl value of various substances including resins, binders for paints and varnishes, primary alcohols, glycols, and fats. The method may also be applicable for determining the hydroxyl value of castor oil and its derivatives. However, its suitability for hydro carboxylic acids, phenolic hydroxyl groups, polyols like trimethyl propane, and substances containing aromatic groups activated for Friedel-Crafts acylation will depend on specific cases.
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