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1、BRITISH STANDARD BS 7664:1993 Incorporating Amendment No. 1 Specification for Undercoat and finishing paints UDC 667.638.4/5 Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 This British Standard, h
2、aving been prepared under the direction of the Surface Treatment and Coatings Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 October 1993 BSI 07-1999 The following BSI references relate to the work on this standard: Committee referenc
3、e STC/28 Draft for comment 92/54900 DC ISBN 0 580 22139 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Surface Treatment and Coatings Standards Policy Committee (STC/-) to Technical Committee STC/28, upon which the following bodies we
4、re represented: British Cement Association British Coatings Federation Ltd. British Decorators Association British Railways Board Consumer Policy Committee of BSI Department of Education Department of the Environment (Property Services Agency) Department of the Environment (Building Research Establi
5、shment) European Resin Manufacturers Association Ministry of Defence Oil and Colour Chemists Association Paint Research Association Society of Chemical Industry Titanium Pigment Manufacturers Technical Committee Amendments issued since publication Amd. No.DateComments 8777September 1995 Indicated by
6、 a sideline in the margin Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 BSI 07-1999i Contents Page Committees responsible Inside front cover Foreword ii 1Scope1 2References1 3Definitions1 4Compos
7、ition1 5Flash point1 6Keeping properties1 7Performance1 8Marking of containers2 Annex A (normative) Preparation of the test panels3 Annex B (normative) Method for assessment of colour3 Annex C (normative) Method for assessment of sag resistance3 Annex D (normative) Method for assessment of surface d
8、ry time3 Annex E (normative) Method for assessment of through dry time3 Annex F (normative) Method for assessment of drying under adverse conditions3 Annex G (normative) Method for assessment of specular gloss4 Annex H (normative) Method for determination for opacity (contrast ratio)4 Annex J (norma
9、tive) Method for assessment of wet edge time4 Annex K (normative) Method for assessment of yellowing4 Annex L (normative) Method for determination of flexibility4 Annex M (normative) Cross-cut test4 Annex N (normative) Method for determination of resistance to artificial weathering5 Annex P (normati
10、ve) Method for determination of resistance to natural weathering5 Figure P.1 Single test area with water trap6 Figure P.2 Diagram showing maximum permitted level of cracking from water trap defect in natural weathering test panel7 Table 1 Requirements for paint films and paint systems2 Table N.1 Del
11、eted List of references Inside back cover Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 ii BSI 07-1999 Foreword This British Standard has been prepared under the direction of the Surface Treatmen
12、ts and Coatings Standards Policy Committee. It is intended that this standard should encompass those materials that are widely available at the date of its publication, e.g. systems based on mineral spirit reducible alkyd resins, suitable for both interior and exterior applications. The composition
13、is however not specified and it is possible that advances in technology may produce water-borne coating systems that can meet the requirements of this British Standard. Paints conforming to this standard are considered capable of application satisfactorily under all reasonable climatic conditions, i
14、.e. when the ambient temperature is between 5 C and 30 C and the relative humidity is not greater than 85 % r.h. In general the test procedures have been aligned, wherever possible, with those specified in the BS 3900 series. This has however not been possible for the following tests. a) Artificial
15、weathering. This test is based on ASTM method G53 using type UVA 351 fluorescent tubes. The test is carried out on a three-coat system using a stable substrate (acid chromate pickled hard aluminium). As the colour range of materials covered by this British Standard is potentially very large, it has
16、not been possible to specify a maximum colour change for every finishing coat colour. A range of 18 colours, together with black and white, has therefore been selected to cover the range of coloured pigments likely to be required in both full strength and reduced strength applications (see clause 4)
17、. The maximum colour change, minimum gloss level and the freedom from chalking after 16 weeks artificial weathering for this limited range of colours is specified. b) Natural weathering. This test is based on the NORD TEST Standard NT Build 229:1989, the test being carried out on a three-coat system
18、 using a primer conforming to either BS 5082:1993 or BS 5358:1993 on a relatively unstable substrate for a period of 12 months. Limits for cracking, blistering, flaking, adhesion and mould growth are specified. c) Opacity (contrast ratio). This test is broadly in line with BS 3900-D6:1982 except tha
19、t sealed black and white card is used as the substrate, the opacity being determined and the minimum value specified for a two-coat system. d) Yellowing test. This test determines the maximum instrumental colour difference occuring after storage of painted panels in complete darkness for a specified
20、 time. It has been assumed in the drafting of this specification that it will be used and applied by persons who are appropriately qualified and experienced. WARNING. This British Standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are n
21、ot taken. This standard refers only to technical suitability and in no way absolves either the designer, the producer, the supplier or the user from statutory obligations relating to health and safety at any stage of manufacture or use. Particular attention is drawn to the hazards associated with o-
22、anisidine which is classified as very toxic by inhalation, in contact with the skin and if swallowed; it is also classified as a category 3 carcinogen. Product certification. Users of this British Standard are advised to consider the desirability of third party certification of product conformity wi
23、th this British Standard based on testing and continuing product surveillance which may be coupled with assessment of a suppliers quality systems against the appropriate Part of BS 5750. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Un
24、controlled Copy, (c) BSI BS 7664:1993 BSI 07-1999iii Enquiries on the availability of third party certification schemes are forwarded by BSI to the Association of Certification Bodies. If a third party certification scheme does not already exist, users should consider approaching a body from the lis
25、t of Association Members. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of page
26、s This document comprises a front cover, an inside front cover, pages i to iv, pages 1 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. L
27、icensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 BSI
28、 07-19991 1 Scope This British Standard specifies requirements for finishing and undercoating paints suitable for both interior and exterior use. It covers paints of liquid or gel type suitable, when used with an appropriate primer, for use on metal, wood, plaster and other substrates. It covers pai
29、nts suitable for application by brush, for application by roller and liquid paints, when thinned as recommended by the manufacturer, for application by spraying. 2 References 2.1 Normative references This British Standard incorporates, by reference, provisions from specific editions of other publica
30、tions. These normative references are cited at the appropriate points in the text and the publications are listed on the inside back cover. Subsequent amendments to, or revisions of, any of these publications apply to this British Standard only when incorporated in it by updating or revision. 2.2 In
31、formative references This British Standard refers to other publications that provide information or guidance. Editions of these publications current at the time of issue of this British Standard are listed on the inside back cover, but reference should be made to the latest editions. 3 Definitions F
32、or the purposes of this British Standard, the definitions given in BS 2015:1992 apply, together with the following. 3.1 paint system for liquid paints, one coat of undercoat and one coat of finish; for gel paints, two coats of finish or as defined by the manufacturer 4 Composition All pigments used
33、to manufacture colours that are not included in the selected range of colours given in Table N.1 shall have been tested and found to conform to this standard when used to produce an appropriate colour (i.e. one of similar hue and depth of shade) chosen from Table N.1. 5 Flash point The paint, when t
34、ested in accordance with BS 3900-A13:1986, shall have a flash point greater than 32 C. 6 Keeping properties The paint, when stored in its original container at a temperature between 5 C and 35 C for 18 months from the date of manufacture, shall conform to clause 7. 7 Performance 7.1 General Unless o
35、therwise specified in the appropriate test method, the test panels shall be prepared and coated as described in Annex A. Unless otherwise specified in the appropriate test method, all tests shall be carried out at a temperature of (23 2) C. 7.2 Sampling For the tests specified in Table 1, a represen
36、tative sample of not less than 500 ml of paint shall be taken in accordance with BS 3900-A1:1992. A container of non-corrodible material shall be used. 7.3 Condition The paint shall be in a condition suitable for application by brushing, roller or, when thinned in accordance with the manufacturers i
37、nstructions, by spraying. The paints in the original containers or in laboratory sample containers, when examined in accordance with BS 3900-A2:1983, shall be free from extraneous matter. They shall show no skinning, hard settlement or other defect which will prevent application to produce a film co
38、nforming to 7.4 and 7.5. 7.4 Application properties and finish The paint system, when applied as described in Annex A to a burnished steel panel measuring not less than 300 mm 100 mm and allowed to dry for 24 h, shall result in an opaque even finish, free from runs and sags. 7.5 Paint film and paint
39、 system properties When tested in accordance with Table 1, the paint film or paint system shall conform to Table 1. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 2 BSI 07-1999 8 Marking of contai
40、ners Each container shall be permanently and legibly marked with the following information: a) the manufacturers name, trademark and product designation; b) the colour and, if appropriate, the colour code in accordance with BS 4800:1989; c) the batch number and/or date of manufacture; d) the number
41、and date of this British Standard and the type of paint, i.e. BS 7664:19931) Undercoat or BS 7664:19931) Finish; e) the method of application and the recommended application rate expressed in square metres per litre; f) the thinners to be used, if required. Table 1 Requirements for paint films and p
42、aint systems 1) Marking BS 7664:1993 on or in relation to a product represents a manufacturers declaration of conformity, i.e. a claim by or on behalf of the manufacturer that the product meets the requirements of the standard. The accuracy of the claim is solely the claimants responsibility. Such a
43、 declaration is not to be confused with third party certification of conformity, which may also be desirable. TestPaint coating; Test panelTest methodRequirement 1 ColourPaint system; Burnished tin plate Annex BShall match the colour specified by the purchaser 2 SaggingSingle coat; GlassAnnex CFinis
44、h only, no sagging at a wet film thickness of 75 4m 3 Surface-dry timeSingle coat; Burnished tin plate Annex DUndercoat k 2 h Finish k 4 h 4 Through-dry timeSingle coat; Burnished tin plate Annex EUndercoat k 4 h Finish k 16 h 5 Drying under adverse conditions Paint system; Burnished tin plate Annex
45、 FSurface dry time k 24 h Through-dry time k 3 days 6 Specular glossSingle coat; GlassAnnex GFinish only, high gloss U 75 units (see note) 7 Opacity (contrast ratio) Paint system; Sealed hiding power chart Annex HContrast ratio U 96 % 8 Wet edge timePaint system; Burnished steel 600 300 mm Annex JNo
46、 evidence of the join 9 Yellowing test (white paints only) Paint system; Burnished tin plate Annex KColour change % E k 2.0 units 10 FlexibilityPaint system; Acid chromate pickled soft aluminium Annex LNo cracking or loss of adhesion 11 Cross-cutPaint system; Burnished tin plate Annex MClassificatio
47、n 0 12 Resistance to artificial weathering Paint system; Acid chromate pickled hard aluminium Annex NChalking not greater than rating 1. 13 Resistance to natural weathering (white paint systems only) Paint system; Primed European redwood (sapwood) or home-grown scots pine Annex PNo blistering Flakin
48、g quantity and class less than 1 Mould growth rating 0 or 1 Cracking shall be of no greater extent than that given in P.4.2d). Adhesion classification 0 or 1 NOTEAlthough the specular gloss has been defined for high gloss materials only, it is however recognized that other finishes, e.g. mid sheen a
49、nd silk may be available. The specular gloss levels of these material finishes should be the subject of agreement between the manufacturer and the purchaser. Licensed Copy: London South Bank University, London South Bank University, Fri Dec 08 14:39:35 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 7664:1993 BSI 07-19993 Annex A (normative) Preparation of the test panels A.1 Preparation of the substrate Use test panels conforming to and prepared in accordance with BS EN 605:1992. A.2 Paint application A.2.1 Unless otherwise specified, apply the paint
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