ImageVerifierCode 换一换
格式:PDF , 页数:3 ,大小:71.63KB ,
资源ID:177089      下载积分:11 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。 如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【https://www.wnwk.com/docdown/177089.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: QQ登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM_D_4958_-_10.pdf)为本站会员(益****师)主动上传,蜗牛文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知蜗牛文库(发送邮件至admin@wnwk.com或直接QQ联系客服),我们立即给予删除!

ASTM_D_4958_-_10.pdf

1、Designation:D495810Standard Test Method forComparison of the Brush Drag of Latex Paints1This standard is issued under the fixed designation D4958;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in p

2、arentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method is a standardized brushout procedurefor comparing the brush drag of architectural type solvent-borne paints.1.2 With slight modificat

3、ions this test method is also appli-cable to solvent-borne paints.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is t

4、heresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D1475 Test Method For Density of Liquid Coatings,Inks,and Related ProductsD3924 Specif

5、ication for Environment for Conditioning andTesting Paint,Varnish,Lacquer,and Related MaterialsD3925 Practice for Sampling Liquid Paints and RelatedPigmented CoatingsD4287 Test Method for High-Shear Viscosity Using a Cone/Plate ViscometerD5068 Practice for Preparation of Paint Brushes for Evalu-atio

6、n3.Terminology3.1 Definitions:See Paint/Coatings Dictionary3for defini-tion of terms used in this test method.3.1.1 brush-dragresistance encountered when applying acoating by brush.4.Summary of Test Method4.1 A50-mm(2-in.)polyester brush is used to apply the testpaint on a 1000-cm2(1.076-ft2)test ar

7、ea.The application ismade at a spreading rate of 9.82 m2/L(400 ft2/gal)and iscompleted in 30 to 35 s.The degree of brush drag is ratedsubjectively using a series of standard descriptive termscorresponding to numerical values of 1 to 10.The rank order ofa set of samples is thereby established.5.Signi

8、ficance and Use5.1 As the brush drag of a paint increases,any naturaltendency on the part of the painter to overspread the paint isreduced.When all other factors are held constant,increasedbrush drag will result in greater film thickness with consequentimprovement in durability and hiding.Conversely

9、,sometimesit might be preferred to have a lesser degree of brush drag foreasier application(that is,the amount of time and effort inapplying a paint to a specific area is reduced with a lesserdegree of brush drag).5.2 This test method provides a standardized brushoutprocedure for the evaluation of b

10、rush drag as an alternative tocustomary informal ad hoc procedures.Its objective is tomaximize the reliability and precision with which this charac-teristic may be determined.NOTE1The brush drag of paints is directly related to their high-shearviscosity.There is generally good rank order agreement b

11、etween resultsobtained by this method and Test Method D4287.The sensitivity of thisbrushout method has been found sufficient to distinguish between brush-abilities corresponding to high-shear viscosity differences not lower than0.3 poise(0.03 Pa.s).Round robin data show that rank order agreementbetw

12、een the brushout and viscometric methods is poor when latex andsolvent-borne paints are part of the same comparison group.This is theresult of these two paint types having markedly different rheologicalproperties that affect the relative perception of brush drag.46.Apparatus6.1 Brush,50-mm(2-in.)pol

13、yester filament,70-mm(234-in.)length-out,14 mm(916in.)thick,with a chiseled tip.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.42 on Architectural Coatings.Current edition a

14、pproved Dec.1,2010.Published December 2010.Originallyapproved in 1989.Last previous edition approved in 2004 as D4958 97(2004).DOI:10.1520/D4958-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards v

15、olume information,refer to the standards Document Summary page onthe ASTM website.3Available from Federation of Societies for Coatings Technology(FSCT),492Norristown Rd.,Blue Bell,PA 194222350,http:/www.coatingstech.org.4Supporting data have been filed at ASTM International Headquarters and maybe ob

16、tained by requesting Research Report RR:D01-1072.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2All tests of a given series of paints,within or betweenlaboratories,should be carried out with commercially identical brushes.6.2 Stopwatch.6.3 Balance,capable of weighing accurately to 0.1 g.6.4 Test charts,with a sealed surface,having 1000 cm2(1.076 ft2)of test area.57.Sampling and Conditioning7.1 Sample in accordance with Practice

copyright@ 2008-2023 wnwk.com网站版权所有

经营许可证编号:浙ICP备2024059924号-2