SIST EN 14022:2003
(Main)Structural Adhesives - Determination of the pot life (working life) of multicomponent adesives
Structural Adhesives - Determination of the pot life (working life) of multicomponent adesives
This European Standard provides means of determining in appropriate ways the variable property known alternatively as useable working life and pot life. This standard specifies 4 methods for the determination of the time available for use, each of which is related to specific circumstances; particularly important being the rheology of the adhesive concerned and its rate of reaction. NOTE: For the purposes of simplification the term "pot life" is deemed to have the same meaning as "working life" and will be used to represent bot throughout this standard.
Strukturklebstoffe - Bestimmung der Topfzeit (Verarbeitungszeit) von Mehrkomponentenklebstoffen
Adhésifs structuraux - Détermination de la durée de vie en pot (délai d'utilisation) des adhésifs multicomposants
La présente Norme Européenne permet de déterminer de diverses manieres appropriées une propriété variable appelée au choix «durée de vie utile en pot» ou «délai d'utilisation».
La présente norme fixe cinq méthodes de détermination de la durée d'emploi possible, liées a des circonstances spécifiques, deux parametres étant particulierement importants, a savoir la rhéologie de l'adhésif considéré et sa vitesse de réaction.
NOTE 1 A des fins de simplification, l'expression «durée de vie en pot» est considérée comme ayant la meme signification que «durabilité» et sera utilisée pour représenter ces deux concepts tout au long de la présente norme.
NOTE 2 La présente Norme européenne peut également etre utilisée pour évaluer des adhésifs non structuraux.
NOTE 3 Du fait de la différence de propriétés des différents systemes multicomposants, telles que rhéologie ou viscosité, vitesse de durcissement etc., toutes les méthodes ne peuvent pas etre employées pour tous les systemes multicomposants avec la meme adéquation.
Konstrukcijska lepila – Ugotavljanje roka uporabnosti večkomponentnih lepil
General Information
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Strukturklebstoffe - Bestimmung der Topfzeit (Verarbeitungszeit) von MehrkomponentenklebstoffenAdhésifs structuraux - Détermination de la durée de vie en pot (délai d'utilisation) des adhésifs multicomposantsStructural Adhesives - Determination of the pot life (working life) of multicomponent adesives83.180LepilaAdhesivesICS:Ta slovenski standard je istoveten z:EN 14022:2003SIST EN 14022:2003en01-december-2003SIST EN 14022:2003SLOVENSKI
STANDARD
SIST EN 14022:2003
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14022September 2003ICS 83.180English versionStructural Adhesives - Determination of the pot life (working life)of multicomponent adesivesAdhésifs structuraux - Détermination de la durée de vie enpot (tempos de travail) des adhésifs multicomposantsStrukturklebstoffe - Bestimmung der Topfzeit(Verarbeitungszeit) von MehrkomponentenklebstoffenThis European Standard was approved by CEN on 1 August 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the 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 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2003 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14022:2003 ESIST EN 14022:2003
EN 14022:2003 (E)2ContentspageForeword.31Scope.42Normative references.43Terms and definitions.44Typical purposes for the test methods.44.1Method 1: Determination by means of change in apparent viscosity (rotating viscometer).44.2Method 2: Determination by means of a change in extrusion rate.54.3Method 3: Determination by means of manual application.54.4Method 4: Determination by means of surface contact.54.5Method 5: Determination by means of exothermic reaction temperature.55Limits of the test methods.56Safety.57Determination.57.1General.57.2Method 1: Determination by means of a change in apparent viscosity (rotating viscometer oroscillating rheometer).57.3Method 2: Determination by means of a change in extrusion rate.67.4Method 3: Determination by means of manual application.87.5Method 4: Determination by means of surface contact.87.6Method 5: Determination by means of exothermic reaction temperature.98Expression of results.109Test report.11SIST EN 14022:2003
EN 14022:2003 (E)3ForewordThis document (EN 14022:2003) has been prepared by Technical Committee CEN /TC 193, "Adhesives", thesecretariat of which is held by AENOR.This European Standard shall be given the status of a national standard, either by publication of an identical text orby endorsement, at the latest by March 2004, and conflicting national standards shall be withdrawn at the latest byMarch 2004.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 14022:2003
EN 14022:2003 (E)41 ScopeThis European Standard specifies means of determining in appropriate ways the variable property knownalternatively as useable working life and pot life.This standard specifies five methods for the determination of the time available for use, each of which is related tospecific circumstances; particularly important being the rheology of the adhesive concerned and its rate of reaction.NOTE 1For the purposes of simplification the term "pot life" is deemed to have the same meaning as "working life" and willbe used to represent both throughout this standard.NOTE 2This European Standard can also be used for assessing non-structural adhesives.NOTE 3Because of the different properties of the individual multicomponent systems, like rheology or viscosity, respectivelyvelocity of hardening, etc. not all methods can be applied to each multicomponent system with the same suitability.2 Normative referencesThis European Standard incorporates by dated or undated reference, provisions from other publications. Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter. Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision. For undated references the latest edition of thepublication referred to applies (including amendments).EN 923:1998, Adhesives – Terms and definitions.EN 1066, Adhesives – Sampling.EN 1067, Adhesives – Examination and preparation of samples for testing.EN 12092, Adhesives – Determination of viscosity.3 Terms and definitionsFor the purposes of this European standard the terms and the definitions given in EN 923:1998 and the followingterm and definition apply.3.1pot lifeworking lifeperiod of time during which a multi-part adhesive can be used after its component parts have been mixedNOTEThe pot life of any reacting adhesives is affected by the rate at which the heat energy generated by the reaction isdissipated. The rate of dissipation depends significantly upon the volume and temperature of the mixed adhesive and theambient temperature. The term "pot life" is also used to describe the period during which hot-melt adhesives remain fit for usewhen kept at their normal operating temperatures.4 Typical purposes for the test methods4.1 Method 1: Determination by means of change in apparent viscosity (rotating viscometer)This test method provides a means of measuring a pot life greater than 5 min; where pot life is quantified by meansof a specified increase in the viscosity of the reacting adhesive.SIST EN 14022:2003
EN 14022:2003 (E)54.2 Method 2: Determination by means of a change in extrusion rateThis test method provides a means of measuring a pot life (for paste-like adhesives) greater than 5 min; where potlife is quantified by means of a specified decrease in the weight of reacting adhesives extruded, in unit time, understandard conditions.4.3 Method 3: Determination by means of manual applicationThis generally applicable method provides a means of measuring a pot life of any duration; where pot life isquantified as the time by which a reacting adhesive can no longer be spread by hand.4.4 Method 4: Determination by means of surface contactThis test method provides a means of measuring a pot life; where pot life is quantified as the time by which thesurface of a reacting adhesive is no longer tacky i.e. it is "touch dry". It is particularly suited to the assessment ofthe more rapidly setting epoxide and polyurethane-based adhesives though it can be used to measure a pot life ofany duration.4.5 Method 5: Determination by means of exothermic reaction temperatureThis test method provides a means of measuring a pot life which can be used for any reactive multicomponentsystem; where pot life is quantified as the time
by which a batch of the reaction product reaches a definedtemperature, the so-called critical temperature (e.g. 40 °C). For products producing less than 40 °C exothermicreaction heat in the defined batch, the maximum temperature is taken as criteria.5 Limits of the test methodsWhile the described test methods are suitable for assessing multicomponent epoxide or polyurethane-basedadhesives, they are not suitable for some acrylic based-adhesives.6 SafetyPersons using this standard shall be familiar with normal laboratory practice. This standard does not purport toaddress all safety problems, if any, associated with its use. It is the responsibility of the user to establish safety andhealth practices and to ensure compliance with any European and national regulatory conditions.7 Determination7.1 GeneralThe adhesive to be tested, by any one the five given test methods, shall be sampled, prepared and examinedaccording to EN 1066 and EN 1067. For any method chosen, at least three samples shall be evaluated and themean determined.7.2 Method 1: Determination by means of a change in apparent viscosity (rotating viscometer oroscillating rheometer)7.2.1 PrincipleA multicomponent adhesive is mixed and its pot life established by measuring the time taken for its viscosity tochange by a specified amount.This method is not suitable for the determination of pot lives that are shorter than 5 min in duration.SIST EN 14022:2003
EN 14022:2003 (E)67.2.2 Apparatus7.2.2.1 Balance, capable of weighing up to (500 ± 0,2) g.7.2.2.2 Beaker, squat form, capacity 400 ml, made of an unreactive material with adhesive, whose wallthickness does not exceed 1 mm.7.2.2.3 Spatula made of a non reactive material with adhesive and with an angular, not circular end.7.2.2.4 Viscometer, any suitable means of measuring the viscosity of the adhesive (rotating viscometer oroscillating rheometer) may be selected. See EN 12092, Method 1, for the viscosity measurement with rotatingviscometer.7.2.2.5 Stopwatch, with a limit deviation of
± 1 s.7.2.2.6 Test enclosure, capable of being maintained at the test temperature and if necessary at a relativehumidity of (50 ± 5) %.7.2.3 ProcedureBoth components of the product shall be maintained separately at (23 ± 2) °C. The single components shall beweighed into the beaker (see 7.2.2.2) according t
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