BS EN 1239-2011 Adhesives Freeze-thaw stability《胶粘剂 冻融稳定性》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1239:2011Adhesives Freeze-thawstabilityBS EN 1239:2011 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 1239:2011. Itsupersedes BS EN 1

2、239:1998 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee PRI/52, Adhesives.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a con

3、tract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 72243 1ICS 83.180Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2011.Amendm

4、ents issued since publicationDate Text affectedBS EN 1239:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1239 April 2011 ICS 83.180 Supersedes EN 1239:1998English Version Adhesives - Freeze-thaw stability Adhsifs - Stabilit au gel-dgel Klebstoffe - Gefrier-Auftau-Stabilitt This European St

5、andard was approved by CEN on 10 March 2011. 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

6、 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

7、 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, France, Germany, Greece, Hungary, Iceland, Ireland, I

8、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, 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-1

9、000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1239:2011: EBS EN 1239:2011EN 1239:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Apparatus .46 Samplin

10、g, examination and preparation of samples .57 Procedure .58 Expression of results and classification .59 Test report 6BS EN 1239:2011EN 1239:2011 (E) 3 Foreword This document (EN 1239:2011) has been prepared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. Th

11、is 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 October 2011, and conflicting national standards shall be withdrawn at the latest by October 2011. Attention is drawn to the possibility that some of

12、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 1239:1998. The main modifications regarding the previous version are in the Normative References and 8.1. SAF

13、ETY STATEMENT Persons 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 prac

14、tices and to ensure compliance 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 eliminate

15、d from this standard to 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. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following c

16、ountries are bound to implement this European Standard: 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, Slovakia, S

17、lovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 1239:2011EN 1239:2011 (E) 4 1 Scope This European Standard specifies a method for the evaluation of the freeze-thaw stability of adhesives, their basic constituents and related products. This test has no significance if the sample doe

18、s not freeze under the test conditions. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendme

19、nts) applies. EN 923:2005+A1:2008, Adhesives Terms and definitions EN 1067, Adhesives Examination and preparation of samples for testing EN 12092, Adhesives Determination of viscosity EN ISO 15605, Adhesives Sampling (ISO 15605:2000) 3 Terms and definitions For the purposes of this document, the ter

20、ms and definitions given in EN 923:2005+A1:2008 apply. 4 Principle Measure the viscosity of a sample of the adhesive being tested by placing it in a test chamber for 16 h at a selected temperature of - 5 C, - 10 C, - 15 C or - 20 C, then holding it for 8 h at (23 1) C and finally checking the aspect

21、 of the adhesive. If no coagulum is formed, the cycle is repeated, i.e. the sample is stored at the selected temperature for another 16 h and then held at (23 1) C for 8 h up to a maximum number of three cycles. The final viscosity of the adhesive is measured. Freeze-thaw cycle stability is indicate

22、d by the selected test temperature and the number of cycles endured without visible coagulation at an increase of viscosity not exceeding the manufacturers specification limits. NOTE 1 The freezing temperature selected depends on the chemical nature of the adhesive to be tested and the temperature c

23、onditions to which the adhesive is exposed in service. If necessary, preliminary tests should be carried out in order to determine the appropriate test temperature. NOTE 2 The results obtained by this method are not necessarily applicable to larger-volume vessels. 5 Apparatus 5.1 Cylindrical contain

24、er, 90 mm height, 60 mm inside diameter and 2 mm wall thickness with a large opening on the top and capable of being sealed with an airtight lid. NOTE At test temperatures of - 5 C or - 10 C the container can be made of polyethylene; at lower freezing temperatures cylindrical stainless steel contain

25、er can be used. BS EN 1239:2011EN 1239:2011 (E) 5 5.2 Test chamber, a cabinet, room or enclosure space large enough to contain the samples to be tested allowing at least 25 mm of air space between the sides of adjacent containers and capable of being controlled at temperatures of (- 5 1) C, (- 10 1)

26、 C, (- 15 1) C, and (- 20 1) C, respectively. 5.3 Thermometer, allowing measurement of the temperature inside the test chamber to be 0,5 C. 5.4 Viscometer, in accordance with EN 12092 to determine the viscosity of the adhesive to be tested. 6 Sampling, examination and preparation of samples A signif

27、icant sample of the adhesive shall be taken in accordance with EN ISO 15605 and prepared for testing as described in EN 1067. 7 Procedure 7.1 Measure the viscosity of the sample at (23 1) C in accordance with EN 12092 using a suitable viscometer (see 5.4) and note the result. 7.2 Put (200 5) ml of t

28、he test sample into the cylindrical container (see 5.1). 7.3 Seal the container airtight and place it for 16 h in the test chamber (see 5.2) set at the selected freezing temperature. 7.4 Remove the container from the test chamber and let it thaw at (23 1) C for 8 h. 7.5 Check by insertion of a glass

29、 rod the condition of the sample (homogeneous, water layer on its top, thickened, irreversible gelation, e.g. by formation of elastic, rubbery materials) and note the result. NOTE If visible coagulation is formed that cannot be dispersed by manual stirring, the test is regarded as completed. If this

30、 test is not conclusive, the adhesive should be exposed to a further complete freeze-thaw cycle. 7.6 Homogenize the sample, where the sample shows a surface-water layer or is thickened. 7.7 Continue the test until three freeze-thaw cycles are completed without stating visible coagulum. 7.8 Measure a

31、gain the viscosity of the sample at (23 1) C as described in 7.1. 7.9 Note the test temperature, the condition of the adhesive (see 7.5) after each cycle, the number of cycles completed without formation of visible, indispensable coagulum, the initial viscosity (see 7.1) and the final viscosity (see

32、 7.8) determined. 8 Expression of results and classification 8.1 Expression of results The freeze-thaw stability of the adhesive tested at a selected freeze temperature is expressed as the number of cycles endured without the formation of visible and indispersable coagulum and a change of viscosity

33、not exceeding the manufacturers specification limits. BS EN 1239:2011EN 1239:2011 (E) 6 8.2 Classification In accordance with the test results obtained, the adhesive shall be classified: “freeze temperature / number of cycles“ For example, an adhesive belongs to the freeze-thaw stability class “- 10

34、 C/3 cycles“ in accordance with EN 1239 if enduring three cycles without visible coagulation at a freeze temperature of - 10 C. 9 Test report The test report shall include: a) reference to this European Standard, i.e. EN 1239; b) complete identification of the adhesive under test, in particular type

35、, name/designation, manufacturer, and lot number/date of supply; c) freeze temperature applied in the test cycles; d) initial (see 7.1) and final (see 7.8) viscosities of the adhesive tested; e) test results expressed in accordance with 8.1; f) classification in accordance with 8.2; g) any modificat

36、ion of the procedure described in this standard and any circumstances which may have affected the result; h) date of test. This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, information and servic

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