1、BRITISH STANDARDBS EN 827:2005Incorporating corrigendum no. 1Adhesives Determination of conventional solids content and constant mass solids contentThe European Standard EN 827:2005 has the status of a British StandardICS 83.180g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g
2、53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 827:2005This British Standard was published under the authority of the Standards Policy and Strategy Committee on 25 January 2006 BSI 2007ISBN 0 580 47729 0National f
3、orewordThis British Standard was published by BSI. It is the UK implementation of EN 827:2005. It supersedes BS EN 827:1995 and BS 5350-B2:1976 which are withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives.A list of organizations represented on PR
4、I/52 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since public
5、ationAmd. No. Date Comments16858 Corrigendum No. 131 January 2007 Revision of supersession detailsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 827December 2005ICS 83.180 Supersedes EN 827:1994 English VersionAdhesives - Determination of conventional solids content andconstant mass solids conten
6、tAdhsifs - Dtermination de lextrait sec conventionnel etde lextrait sec masse constanteKlebstoffe - Bestimmung des Feststsoffgehaltes nachVereinbarung und bis zur MassekonstanzThis European Standard was approved by CEN on 21 November 2005.CEN members are bound to comply with the CEN/CENELEC Internal
7、 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 Central Secretariat or to any CEN member.This
8、 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 Central Secretariat has the same status as the officialversions.CEN members are the na
9、tional 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.EURO
10、PEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 827:2005: EEN 827:2005 (E) 2 Co
11、ntents Page Foreword 3 1 Scope .4 2 Normative references .4 3 Terms and definitions.4 4 Safety .4 5 Apparatus 5 6 Sampling5 7 Procedure 5 8 Expression of results7 9 Test report .8 EN 827:2005 (E) 3 Foreword This European Standard (EN 827:2005) has been prepared by Technical Committee CEN/TC 193 “Adh
12、esives”, the 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 June 2006, and conflicting national standards shall be withdrawn at the latest by June 2006. Thi
13、s European Standard supersedes EN 827:1994. 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,
14、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 827:2005 (E) 4 SAFETY STATEMENT: Persons using this European Standard should be familiar with the normal laboratory pra
15、ctice, in principle. This European Standard 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 compliance with any regulatory conditions. 1 Scope This Europea
16、n Standard specifies a method for the determination of conventional solids content and, where possible, constant mass solids content. It is applicable to dispersion, emulsion and solvent based adhesives. 2 Normative references The following referenced documents are indispensable for the application
17、of this European Standard. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 923, Adhesives Terms and definitions EN 1067, Adhesives Examination and preparation of samples for testing EN
18、ISO 15605, Adhesives Sampling (ISO 15605:2000) 3 Terms and definitions For the purposes of this European Standard, the terms and definitions given in EN 923 and the following apply. 3.1 conventional solids content solids content obtained by heating a conventional amount of the sample placed in a giv
19、en vessel at a given temperature for a specific time 3.2 constant mass solids content solids content obtained by heating the sample for successive intervals until the volatile components have evaporated and the residue reaches a constant mass 4 Safety WARNING During the test dangerous volatile produ
20、cts (toxic, harmful, flammable) might be evolved. Particular attention should be paid to protect the operators, using suitable equipment such as extraction fans. EN 827:2005 (E) 5 5 Apparatus 5.1 Oven with natural ventilation, capable of keeping the test temperature constant within 1 C. 5.2 Oven wit
21、h forced ventilation, capable of keeping the test temperature constant within 1 C. 5.3 Analytical balance, accurate to 0,1 mg. 5.4 Flat bottomed thin metal container, e.g. metal lid, with the diameter and depth as indicated in 7.6.1. 5.5 Desiccator, with appropriate desiccant. 6 Sampling Take a repr
22、esentative sample of the adhesives to be tested, in accordance with EN ISO 15605 and prepare it in accordance with EN 1067. 7 Procedure The following procedure shall be carried out in duplicate: 7.1 Place the clean container (5.4) in the oven (5.1 or 5.2 according to 7.6.1) at the test temperature f
23、or about 30 min then let it cool in the desiccator (5.5) for at least 15 min. 7.2 Using the analytical balance (5.3) weigh the container (5.4) to the nearest 0,1 mg and let m1be the mass in grams. 7.3 Transfer carefully a test portion of 1 g to 5 g of adhesive according to 7.6.1, into the container
24、(5.4) and weigh to the nearest 0,1 mg and let m2 be the mass in grams. 7.4 Place the container in the oven (5.1 or 5.2 according to 7.6.1) and dry at the temperature and for the time specified in 7.6. 7.5 Remove the container from the oven, cool it in a desiccator (5.5) for at least 15 min, and weig
25、h it to the nearest 0,1 mg and let m3be the mass in grams. EN 827:2005 (E) 6 7.6 Oven drying conditions 7.6.1 Determination of conventional solids content Table 1 Test conditions Types of adhesives Quantity sample (g) Diameter metal container d (mm) Temperature c (C) Time (min) Type of oven Natural
26、adhesives Adhesives of vegetable origin Adhesives of animal origin 2 0,2 2 0,2 60 5 60 5 105 1 105 1 120 1 120 1 Forced ventilation (5.2) Forced ventilation (5.2) Synthetic adhesives Phenolic resins a Penolic resins for wood applications a Amino resins Poly(vinyl alcohol) type 2 0,2 2 0,2 2 0,2 2 0,
27、2 60 5 35 5 35 5 60 5 135 1 120 1 120 1 105 1 180 1 120 1 120 1 120 1 Natural ventilation (5.1) Natural ventilation (5.1) Natural ventilation (5.1) Natural ventilation (5.1) Aqueous dispersion adhesives Vinyl polymers and copolymers Acrylate polymers and copolymers Miscellaneous synthetics Natural r
28、ubbers for latex Polyurethanes Plasticized polymers 1 0,1 1 0,1 1 0,1 1 0,1 1 0,1 1 0,1 60 5 60 5 60 5 60 5 60 5 60 5 105 1 105 1 105 1 105 1 105 1 80 1 60 1 60 1 60 1 60 1 60 1 60 1 Natural ventilation (5.1) Natural ventilation (5.1) Natural ventilation (5.1) Natural ventilation (5.1) Natural venti
29、lation (5.1) Natural ventilation (5.1) 1 0,1 60 5 105 1 120 1 Forced ventilation (5.2) Organic solvent based adhesives Inert adhesives Reactive adhesives bTest conditions shall be agreed in advance between the parties aIt can be necessary to dilute certain adhesives based on phenolic resins with alc
30、ohol so that the test portion can be spread readily. bUnlike the other organic solvent based adhesives the components of reactive products are in the intermediate state between monomer and polymer. These adhesives can have a significant vapour pressure at 105 C which can result in a loss of active i
31、ngredient; therefore under normal conditions of use, these active ingredients are an integral part of the solids content. Under these circumstances the determination of the solids content of such adhesives is uncertain. cThe required temperature varies according to the type of product under test and
32、 depends in particular on the risk of heat degradation, volatility of the solvents and the possibility of reactions such as polycondensations. It is essential that the required temperature tolerance is achieved. Ovens used shall therefore be examined to ensure that the internal temperature distribut
33、ion is such that these requirements are fully complied with. dThe metal container depth is important as well. It shall be between 3 mm and 10 mm. EN 827:2005 (E) 7 7.6.2 Determination of the constant mass solids content This procedure shall not be used with phenolic resins and amino resins. Continue
34、 drying for about 2 h at a temperature as indicated in 7.6.1. Weight the container after conditioning in a desiccator (5.5) to the nearest 0,1 mg. Dry for further successive intervals of approximately 30 min. When successive weighings do not differ by more than 2 mg, the lower of the two shall be ta
35、ken as m4(in grams). If constant mass is not achieved after five cycles, this method is considered unsuitable for measuring the solids content of the product under test. 8 Expression of results 8.1 Conventional solids content (C1) Express the result of each of the two tests as a percentage by mass u
36、sing the following Equation (1): m3- m1C1= _x 100 % (1) m2- m1 Calculate the arithmetic mean and report it rounded to the first decimal. The difference between each measurement and the mean shall be less than 1 % of this mean; otherwise repeat the test in duplicate. 8.2 Constant mass solids content
37、(C2) Express the result of each of the two tests as a percentage by mass using the following Equation (2): m4- m1C2= _x 10 % (2) m2- m1Calculate the arithmetic mean and report it rounded to the first decimal. The difference between each measurement and the mean shall be less than 2 % of this mean; o
38、therwise repeat the test. EN 827:2005 (E) 8 9 Test report The test report shall include the following information: a) reference to this European Standard, i.e. EN 827; b) type and denomination of the adhesive tested; c) test conditions (container diameter, type of oven, temperature and drying time);
39、 d) results obtained for the conventional solids content or the constant mass solids content, or the two results one after the other; e) any modification to the procedure described, and any circumstances which may have affected the results; f) date of test blankBS EN 827:2005BSI389 Chiswick High Roa
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