SANS 1077-2009 Sealing compounds for the building and construction industry two-component polyurethane-base《建筑行业用两组分聚氨酯基密封剂》.pdf

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1、 Collection of SANS standards in electronic format (PDF) 1. Copyright This standard is available to staff members of companies that have subscribed to the complete collection of SANS standards in accordance with a formal copyright agreement. This document may reside on a CENTRAL FILE SERVER or INTRA

2、NET SYSTEM only. Unless specific permission has been granted, this document MAY NOT be sent or given to staff members from other companies or organizations. Doing so would constitute a VIOLATION of SABS copyright rules. 2. Indemnity The South African Bureau of Standards accepts no liability for any

3、damage whatsoever than may result from the use of this material or the information contain therein, irrespective of the cause and quantum thereof. ISBN 978-0-626-22647-3 SANS 1077:2009 Edition 1.2Any reference to SABS 1077 is deemed to be a reference to this standard (Government Notice No. 1373 of 8

4、 November 2002)SOUTH AFRICAN NATIONAL STANDARD Sealing compounds for the building and construction industry, two-component, polyurethane-base Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: +27 12 428 7911 Fax: +27 12 344 1568 www.sabs.co.za SABS

5、 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 Table of changes Change No. Date Scope Amdt 1 1990 Amended to change the requirement for resistance to compression- extension cycling. Amdt 2 2009 Amended to change the

6、 designation of SABS standards to SANS standards, to update the definition of “acceptable“, to update referenced standards, and to remove reference to the standardization mark. Foreword This South African standard was approved by National Committee SABS TC 1012, Sealants, in accordance with procedur

7、es of the SABS Standards Division, in compliance with annex 3 of the WTO/TBT agreement. This document was published in April 2009. This document supersedes SABS 1077:1984 (edition 1). A vertical line in the margin shows where text has been technically modified by amendment Nos 1 and 2. This standard

8、 may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 1 Contents Page Foreword 1 Scope . 3 2 Definitions . 3 3 Requirements . 4 4 Packing and marking . 6 5 Inspection and methods of test 6 5.1 Inspection 6 5.2 Preparation of test sample

9、s and test substrates . 6 5.3 Application (work) life 7 5.4 Storage stability . 7 5.5 Application temperature range 7 5.6 Colour 8 5.7 Tack-free time . 8 5.8 Rheological properties 8 5.9 Hardness . 8 5.10 Staining and colour stability 8 5.11 Mass loss and resistance to heat-aging 8 5.12 Adhesion in

10、peel 8 5.13 Adhesion in peel after ultraviolet radiation exposure through glass . 8 5.14 Resistance to compression-extension cycling (type 1 and type 2) . 8 5.15 Gassing . 9 Appendix A Applicable standards 10 Appendix B Notes to purchasers . 10 Appendix C Quality evaluation of two-component polyuret

11、hane-base sealing compounds produced to the requirements laid down in the specification. 11 Appendix D Notes to users 12 Appendix E Note to manufacturers 14 This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 2 This page

12、is intentionally left blank This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 3 Sealing compounds for the building and construction industry, two-component, polyurethane-base 1 Scope 1.1 This specification covers requir

13、ements for two types (see 3.1) of two-component, cold-applied, polyurethane-base sealing compound, that are suitable for sealing, caulking and glazing applications in buildings and similar structures. NOTE a) The standards referred to in the specification are listed in Appendix A. b) Requirements th

14、at must be specified by the purchaser, and an important precaution, are given in appendix B. c) Information regarding the verification of the quality of two-component, polyurethane-base sealing compounds produced to this specification, and the sampling plan to be used to assess compliance with the s

15、pecification of a lot are given in appendix C. d) Notes to users of the compounds are given in appendix D. e) A note to manufacturers regarding the essential properties of primers and the marking of containers of primers is given in appendix E. 2 Definitions For the purposes of this document, the fo

16、llowing definitions shall apply: acceptable acceptable to the authority administering this standard, or to the parties concluding the purchase contract, as relevant Amdt 2 batch final blend of the base component in one vessel and a final blend of the curing agent in another vessel, from which sets o

17、f containers are filled for distribution and marketing sealing compound sealant material obtained by so mixing together thoroughly the base component and the curing agent in the proportions stipulated by the manufacturer as to produce a homogeneous mass This standard may only be used and printed by

18、approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 4 set of containers container of base component and a container of curing agent (or the base component compartment and the curing agent compartment of a two-compartment container or of a split-layer type of containe

19、r) of the sizes required to produce the ready-for-use sealing compound standard test conditions temperature of 25 C 2 C and a relative humidity of 50 % 4 % 3 Requirements 3.1 Types The sealing compound shall be of one of the following types: a) Type 1. Pouring grade (self-levelling). b) Type 2. Gun

20、grade (non-sag). 3.2 Composition The sealing compound shall be of a two-component type that contains (as the only binder) a urethane polymer that does not contain a polyester component and that cures to an elastomeric solid with a tack-free surface. 3.3 Application temperature range The sealing comp

21、ound, when tested in accordance with 5.5, shall be suitable for practical handling throughout the temperature range 5 C to 35 C. 3.4 Storage stability After storage in the original unopened containers at 25 C 2 C for 9 months after the date of manufacture, the sealing compound shall still comply wit

22、h all the other requirements of the specification. 3.5 Application (work) life The sealing compound, when tested in accordance with 5.3, shall have an application life of between 1, 5 h and 6 h. 3.6 Colour The colour of the sealing compound after curing shall, when examined in accordance with 5.6, b

23、e a practical match to the specified colour standard agreed upon between the purchaser and the manufacturer. 3.7 Tack-free time When tested in accordance with 5.7, the sealing compound shall cure to a tack-free condition within 72 h from the time of mixing. This standard may only be used and printed

24、 by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 5 3.8 Rheological properties When tested in accordance with 5.8, a) a type 1 sealing compound shall self-level in a horizontal seam at 5 C, and b) a type 2 sealing compound shall not sag or flow more than 2 mm i

25、n the vertical slump test, and in the horizontal slump test shall show no deformation. 3.9 Hardness When the sealing compound is tested in accordance with 5.9, both the initial hardness and the hardness after heat-aging shall be between 15 and 50 international rubber hardness (IRH) degrees, and the

26、hardness after heat-aging shall not exceed the initial hardness by more than 10 degrees. 3.10 Staining and colour stability When tested in accordance with 5.10, the sealing compound shall not cause any visible stain on the surface of the white cement mortar, nor shall the weathered specimen show a c

27、olour-change rating lower than 4 on the international geometric grey scale for assessing change in colour. 3.11 Mass loss and resistance to heat-aging After having been tested in accordance with 5.11, the sealing compound shall not a) lose more than 5 % of its original mass, b) show any signs of cra

28、cks or chalking. 3.12 Adhesion in peel When tested in accordance with 5.12 on glass, aluminium, standard mortar and (when relevant) any other substrate recommended by the manufacturer, the sealing compound shall have a peel strength of at least 2,0 kN/m of width and shall not, in any individual test

29、, show more than a 10 % loss of adhesion. 3.13 Adhesion in peel after ultraviolet radiation exposure through glass When tested in accordance with 5.13, the sealing compound shall comply with the requirements specified in 3.12. 3.14 Resistance to compression-extension cycling When the sealing compoun

30、d is tested in accordance with 5.14 on glass, aluminium, standard mortar and (when relevant) any other substrate recommended by the manufacturer, the total area of loss of bond and loss of cohesion on an individual specimen shall not exceed 200 mm 2 . Amdt 1 3.15 Gassing When the sealing compound is

31、 tested in accordance with 5.15, any increase in level of the sample cured at 25 C 2 C shall not exceed 1,5 mm, and that of the sample cured at 50 C 2 C shall not exceed 3,0 mm. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edi

32、tion 1.2 6 4 Packing and marking 4.1 Packing The sealing compound shall be supplied in containers that are strong enough to withstand normal usage and that are so sealed as to prevent leakage and contamination of the contents during normal transportation and handling. The curing agent shall be segre

33、gated from the base component, either in a completely separate container or in a dual pack or in a split-layer type of container. Only containers or sets of containers containing base component and curing agent from the same batch shall be packed together in a bulk container. 4.2 Marking Each set of

34、 containers shall be legibly and durably marked with the following information: a) the manufacturers name and the brand name of the product; b) when and as relevant, the words “Base component for polyurethane sealing compound“ or “Curing agent for polyurethane sealing compound“; c) the type; d) the

35、colour; e) the mixing instructions; f) the application instructions, including instructions for the application of the primers recommended for use on specific surfaces; g) the batch identification(s); h) the expiry date (i.e. the date before which the materials must be used); i) the storage temperat

36、ure range; and j) the date of manufacture (unless indicated by the batch identification(s). 5 Inspection and methods of test 5.1 Inspection Inspect the containers in the consignment for compliance with the requirements of 4.1 and 4.2. 5.2 Preparation of test samples and test substrates 5.2.1 Test sa

37、mples Unless otherwise stated in the method, condition (before each test) the closed containers of base component and curing agent under standard test conditions for 16 h to 24 h. Then, using the proportions stipulated by the manufacturer, a square-tipped spatula, a cylindrical vessel of appropriate

38、 size and a mixing time of 10 min, prepare by hand not more than 500 g (at any one time) of the sealing compound. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 7 5.2.2 Test substrates a) When appropriate, before the

39、 application of primer or sealant, clean substrate materials in accordance with the procedure given in the relevant test method in SANS 110. b) Subject, when relevant, to the procedure given for the preparation of test specimens, when so specified by the manufacturer of the sealing compound, prime s

40、ubstrate materials with the recommended primer in the manner specified. NOTE Include in test reports the use of such primers and the manufacturers designation of the primers. 5.3 Application (work) life 5.3.1 Equipment a) Caulking gun. An air-powered caulking gun that has a tapered nozzle with an or

41、ifice of internal diameter 6,35 mm 0,5 mm and a nozzle of length 75 mm 0,5 mm. b) Compressed-air supply. A supply of clean dry air at a constant pressure of 550 kPa. c) A balance, sensitive to 0,5 g. d) Filter paper. e) A stop-watch with second hand. 5.3.2 Procedure a) Condition the caulking gun und

42、er standard test conditions (see 2.1) for at least 4 h. Prepare (see 5.2.1) approximately 400 g of the sealing compound and place it in the gun, taking care to avoid entrapment of air. Connect the gun to the compressed-air supply and, by compressing the compound, eliminate possible air pockets by ex

43、pelling about 30 g of the compound from the gun. b) Then, just less than 90 min after the base component and curing agent first came into contact during mixing, carry out the test (under standard test conditions) by extruding and discarding at least 25 mm of the compound, and then extruding (and sta

44、rting the stop-watch simultaneously) 50 g of the compound onto filter paper placed on the pan of the balance. Record, to the nearest second, the extrusion period by stopping the stop-watch and extrusion simultaneously, and consider the work life of the compound to be over if this period exceeds 60 s

45、. c) If the extrusion period did not exceed 60 s, repeat the extrusion procedure given in (b) above four and a half hours later, and consider the compound to comply with the requirements of 3.5 if the extrusion period exceeds 60 s. 5.4 Storage stability Store the set of sample containers taken for t

46、he storage stability test (see C.2.2) for 9 months from the date of manufacture under standard test conditions, and at the end of this period examine and test the sealing compound for compliance with the requirements of 3.4. 5.5 Application temperature range Condition adequate quantities of the base

47、 component and curing agent at 5 C and at 35 C for at least 16 h. Prepare (see 5.2.1) and apply the sealing compound, first at 5 C, and then again at 35 C, using the method described in 5.3.2(a) and, immediately after mixing, carry out the extrusion procedure described in 5.3.2(b) to assess whether

48、the material is suitable for application. This standard may only be used and printed by approved subscription and freemailing clients of the SABS.SANS 1077:2009 Edition 1.2 8 5.6 Colour Prepare (see 5.2.1) enough sealing compound and spread it evenly to form a film of thickness at least 1 mm over an

49、 area of at least 70 mm 75 mm on a suitable steel panel. Allow the sealing compound to cure under standard test conditions for 7 d. At the end of this period, compare the colour of the sealing compound with the specified colour standard by viewing it and the standard placed adjacent to it, under conditions of diffused southern daylight or its equivalent. Ensure that the light falls vertically on the surfaces being compared and that the viewing is done at 45 from the normal. 5.7 Tack-free time Use the relevant method described in SANS 110. 5.8 Rheological