ASTM D2372-1985(2005) Standard Practice for Separation of Vehicle From Solvent-Reducible Paints《从可还原溶剂型涂料中分离载色体的标准规程》.pdf
《ASTM D2372-1985(2005) Standard Practice for Separation of Vehicle From Solvent-Reducible Paints《从可还原溶剂型涂料中分离载色体的标准规程》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2372-1985(2005) Standard Practice for Separation of Vehicle From Solvent-Reducible Paints《从可还原溶剂型涂料中分离载色体的标准规程》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 2372 85 (Reapproved 2005)Standard Practice forSeparation of Vehicle From Solvent-Reducible Paints1This standard is issued under the fixed designation D 2372; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year o
2、f last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This practice covers the procedure
3、 for the separation ofthe vehicle from the pigment in solvent-reducible paint.1.2 In the development of the practice the following mate-rials were tested: white soya and white fish oil isophthalicalkyd semi-gloss enamels, white linseed oil paint, white soyaand white linseed o-phthalic alkyd enamels.
4、 It is considered tobe applicable to similar materials.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 therespo
5、nsibility 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:2D 2371 Test Method for Pigment Content of Solvent-Reducible PaintsD 2698 Test Method for Det
6、ermination of the PigmentContent of Solvent-Reducible Paints by High-Speed Cen-trifuging3. Significance and Use3.1 Separation of the vehicle from the pigment in solvent-reducible paints is required in order to characterize paintvehicles by chemical, spectroscopic, or chromatographic tech-niques. Cha
7、racterization of vehicles is important since theyplay a major role in the performance of coatings.4. Apparatus4.1 Centrifuge, high-speed, capable of developing in excessof 10 000 g.NOTE 1Calculate the gravity developed by the centrifuge as follows:g 5 1.118 3 102 63 r 3 n2(1)where:r = rotating radiu
8、s, mm, andn = rotating speed, r/min.5. ProcedureNOTE 2If the percent of pigment is desired, see Test Method D 2371and Test Method D 2698.5.1 Mix the sample until it is homogeneous, preferably on amechanical shaker.5.2 Centrifuge about 20 mL of the whole paint on ahigh-speed centrifuge in excess of 1
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