EN 14022-2010 en Structural Adhesives - Determination of the pot life (working life) of multi-component adhesives《结构胶粘剂 多组分胶粘剂适用期的测定》.pdf

1、BS EN 14022:2010ICS 83.180NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDStructural adhesives Determination ofthe pot life (workinglife) of multicomponentadhesivesThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee

2、 on 30 April2010 BSI 2010ISBN 978 0 580 68327 5Amendments/corrigenda issued since publicationDate CommentsBS EN 14022:2010National forewordThis British Standard is the UK implementation of EN 14022:2010. Itsupersedes BS EN 14022:2003 which is withdrawn.The UK participation in its preparation was ent

3、rusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct application.Compliance with a

4、British Standard cannot confer immunityfrom legal obligations.BS EN 14022:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14022 February 2010 ICS 83.180 Supersedes EN 14022:2003English Version Structural Adhesives - Determination of the pot life (working life) of multi-component adhesives A

5、dhsifs structuraux - Dtermination de la dure de vie en pot (dlai dutilisation) des adhsifs multicomposants Strukturklebstoffe - Bestimmung der Topfzeit (Verarbeitungszeit) von Mehrkomponentenklebstoffen This European Standard was approved by CEN on 28 December 2009. CEN members are bound to comply w

6、ith 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 Management

7、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 Management Centre has the same status as the off

8、icial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Sl

9、ovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means reserved worldwi

10、de for CEN national Members. Ref. No. EN 14022:2010: EBS EN 14022:2010EN 14022:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Typical purposes for the test methods .54.1 Method 1: Determination by means of change in apparent viscosity (rotating viscom

11、eter or oscillating rheometer) .54.2 Method 2: Determination by means of a change in extrusion rate .54.3 Method 3: Determination by means of manual application .54.4 Method 4: Determination by means of exothermic reaction temperature .54.5 Method 5: Determination by means of a drying recorder 55 Li

12、mits of the test methods 56 Determination .56.1 General 56.2 Method 1: Determination by means of a change in apparent viscosity (rotating viscometer or oscillating rheometer) .66.2.1 Principle 66.2.2 Apparatus .66.2.3 Procedure .66.3 Method 2: Determination by means of a change in extrusion rate .76

13、.3.1 Principle 76.3.2 Apparatus .76.3.3 Procedure .76.4 Method 3: Determination by means of manual application .86.4.1 Principle 86.4.2 Apparatus .86.4.3 Procedure .86.5 Method 4: Determination by means of exothermic reaction temperature .96.5.1 Principle 96.5.2 Apparatus .96.5.3 Procedure .96.6 Met

14、hod 5: Determination by means of a drying recorder . 106.6.1 Principle . 106.6.2 Apparatus 106.6.3 Procedure 107 Expression of results . 118 Test report . 11BS EN 14022:2010EN 14022:2010 (E) 3 Foreword This document (EN 14022:2010) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the

15、 secretariat 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 or by endorsement, at the latest by August 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. Attention i

16、s 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. This document supersedes EN 14022:2003. This document has been prepared under a mandate given to

17、CEN by the European Commission and the European Free Trade Association, and supports essential requirements of EU Directive(s). According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, B

18、elgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN

19、14022:2010EN 14022:2010 (E) 4 1 Scope This European Standard specifies means of determining in appropriate ways the variable property known alternatively as useable working life and pot life. This European Standard specifies five methods for the determination of the time available for use, each of w

20、hich is related to specific circumstances; particularly important being the rheology of the adhesive concerned and its rate of reaction. This European Standard can also be used for assessing non-structural adhesives. NOTE EN 302-7 could also be used for the determination of working life of adhesives

21、 for load-bearing timber structures. Because of the different properties of the individual multi-component systems, like rheology or viscosity, respectively velocity of hardening, etc., not all methods can be applied to each multi-component system with the same suitability. SAFETY STATEMENT Persons

22、using this document should be familiar with the normal laboratory practice, if applicable. This document 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 co

23、mpliance with any regulatory conditions. ENVIRONMENTAL STATEMENT It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materials, they will be eliminated from this standard t

24、o the extent possible. At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated refe

25、rences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 923:2005, Adhesives Terms and definitions EN 1067, Adhesives Examination and preparation of samples for testing EN 12092:2001, Adhesives Determination

26、of viscosity EN ISO 15605, Adhesives Sampling (ISO 15605:2000) 3 Terms and definitions For the purposes of this document, the terms and the definitions given in EN 923:2005 and the following apply. 3.1 pot life working life period of time during which a multi-component adhesive can be used after its

27、 component parts have been mixed BS EN 14022:2010EN 14022:2010 (E) 5 NOTE 1 The pot life of any reacting adhesives is affected by the rate at which the heat energy generated by the reaction is dissipated. The rate of dissipation depends significantly upon the volume and temperature of the mixed adhe

28、sive and the ambient temperature. The term “pot life“ is also used to describe the period during which hot-melt adhesives remain fit for use when kept at their normal operating temperatures. NOTE 2 While in some of the measuring methods described in this standard the pot life is measured as the peri

29、od of time which starts when the mixing ends, in some other methods described in this standard, the pot life is measured as the period of time which starts when the mixing starts. 4 Typical purposes for the test methods 4.1 Method 1: Determination by means of change in apparent viscosity (rotating v

30、iscometer or oscillating rheometer) This test method provides a means of measuring a pot life greater than 5 min; where pot life is quantified by means of a specified increase in the viscosity of the reacting adhesive. 4.2 Method 2: Determination by means of a change in extrusion rate This test meth

31、od provides a means of measuring a pot life (for paste-like adhesives) greater than 5 min; where pot life is quantified by means of a specified decrease in the weight of reacting adhesives extruded, in unit time, under standard conditions. 4.3 Method 3: Determination by means of manual application T

32、his generally applicable method provides a means of measuring a pot life of any duration; where pot life is quantified as the time by which a reacting adhesive can no longer be spread by hand. 4.4 Method 4: Determination by means of exothermic reaction temperature This test method provides a means o

33、f measuring a pot life which can be used for any reactive multi-component system; where pot life is quantified as the time by which a batch of the reaction product reaches a defined temperature, the so-called critical temperature (e.g. 40 C). For products producing less than 40 C exothermic reaction

34、 heat in the defined batch, the maximum temperature is taken as criteria. 4.5 Method 5: Determination by means of a drying recorder This test method provides a means of measuring the pot life, for two component adhesives and specially for one component adhesives which easily react with air humidity

35、(e.g. PUR prepolymers). 5 Limits of the test methods While the described test methods are suitable for assessing multi-component epoxide or polyurethane-based adhesives, they are not suitable for some acrylic based-adhesives. 6 Determination 6.1 General The adhesive to be tested, by any one the five

36、 given test methods, shall be sampled, prepared and examined according to EN ISO 15605 and EN 1067. For any method chosen, at least three samples shall be evaluated and the mean determined. BS EN 14022:2010EN 14022:2010 (E) 6 6.2 Method 1: Determination by means of a change in apparent viscosity (ro

37、tating viscometer or oscillating rheometer) 6.2.1 Principle A multi-component adhesive is mixed and its pot life established by measuring the time taken for its viscosity to change by a specified amount. This method is not suitable for the determination of pot lives that are shorter than 5 min in du

38、ration. 6.2.2 Apparatus 6.2.2.1 Balance, capable of weighing up to (500 0,2) g. 6.2.2.2 Beaker, squat form, capacity 400 ml, made of an unreactive material with adhesive, whose wall thickness does not exceed 1 mm. 6.2.2.3 Spatula made of a non-reactive material with adhesive and with an angular, not

39、 circular end. 6.2.2.4 Viscometer, any suitable means of measuring the viscosity of the adhesive (rotating viscometer or oscillating rheometer) may be selected. See EN 12092:2001, Method 1, for the viscosity measurement with rotating viscometer. 6.2.2.5 Stopwatch, accurate to 1 s. 6.2.2.6 Test enclo

40、sure, capable of being maintained at the test temperature and if necessary at a relative humidity of (50 5) %. 6.2.3 Procedure Both components of the product shall be maintained separately at (23 2) C. The single components shall be weighed into the beaker (see 6.2.2.2) according to the mixing ratio

41、 specific for the product, with the preferred mass of the batch of the products being (200 20) g. Start the stopwatch (see 6.2.2.5) and mix the batch with an angular, not circular end of a spatula (see 6.2.2.3) for (60 10) s. Take care that also the areas within the angle between side and bottom of

42、the beaker are well mixed. It is also allowed to determine a pot life of a batch which was produced with the help of a static or dynamic mixer, which has to be defined specifically. Immediately after mixing measure the viscosity with a viscometer (see 6.2.2.4) of the freshly prepared adhesive. Recor

43、d the first data after having finished mixing as the starting viscosity point. Continue the measurement in intervals dependent on the pot life expected. NOTE The number of measurements as well as the extent of shear at mixing of the components and the measurement itself can have an influence on visc

44、osity and pot life. Therefore, it is recommended to fix the intervals of measurements as well as mixing, shear speed and rotational speed specific to the adhesive. The pot life of the adhesive is the difference between time at the end of mixing and the time when a fixed agreed viscosity is reached.

45、Usually the fixed agreed viscosity is double the starting viscosity. BS EN 14022:2010EN 14022:2010 (E) 7 6.3 Method 2: Determination by means of a change in extrusion rate 6.3.1 Principle A multi-component adhesive is mixed and its pot life established by measuring the time taken for there to be a s

46、pecified decrease in the quantity of adhesive extruded through a calibrated orifice, in unit time, under standard conditions. This method is not suitable for the measurement of pot lives that are shorter than 5 min in duration. 6.3.2 Apparatus 6.3.2.1 Cartridge, plastic disposable cartridge of 47 mm

47、 internal diameter and 210 mm length, fitted with an appropriate piston; both components being made from a non-reactive material. 6.3.2.2 Balance, capable of weighing up to (500 0,2) g. 6.3.2.3 Stirrer, rigid, helicoidal steering spindle made from non-reactive material suitable for use in conjunctio

48、n with the adhesive being assessed. 6.3.2.4 Motor, an electrically or pneumatically powered stirrer motor whose speed can be regulated between 0 r/min and 1 000 r/min. 6.3.2.5 Nozzle, calibrated made from non-reactive material, capable of being screwed onto the end fitting of the cartridge (see 6.3.

49、2.1). The diameter of the nozzles extrusion orifice shall be suitable for dispensing the mixed adhesive. An orifice diameter of 2 mm to 4 mm is recommended for evaluation. 6.3.2.6 Extrusion gun, air pressurised extrusion gun suitable for use with the cartridge described in 6.3.2.1. 6.3.2.7 Pressure gauge, air pressure gauge capable of measuring air pressure up to 500 kPa with a precision of 10 kPa. 6.3.2.8 St