1、Designation:D125906(Reapproved 2012)Standard Test Methods forNonvolatile Content of Resin Solutions1This standard is issued under the fixed designation D1259;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 These test methods cover the determination of nonvola
3、-tile content of solutions of resins in volatile organic solvents.1.2 Two test methods are included as follows:1.2.1 Test Method AFor solutions of non-heat-reactiveresins.These solutions contain resins that remain stable andrelease the solvent under conditions of the test.Examples areester gums and
4、alkyds.1.2.2 Test Method BFor two types of solutions:1.2.2.1 Solutions of heat-reactive resins.These solutionscontain resins that undergo condensation or other reactionsunder the influence of heat.Examples include the formalde-hyde reaction products of urea,melamine,and phenols.1.2.2.2 Solutions tha
5、t release solvent slowly.Examplesinclude epoxy resin solutions.1.3 Test Methods A and B differ primarily in the dryingtimes and types of oven used.1.4 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.5 This standard does not pu
6、rport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility 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.Summary of Test Methods2.1 In both test metho
7、ds,a weighed specimen of resinsolution is spread under pressure between two weighed sheetsof aluminum or tin foil.The coated foil sheets are separatedand then dried.The weight of residue is determined and thenonvolatile content is calculated.The test method is unique inthat it provides for drying of
8、 a very thin film of resin,thusminimizing chances for volatiles to be trapped and held duringthe heating operation.2.2 Either a gravity-convection or a forced-ventilation ovenand a 30-min heating period at 105C are used in Test MethodA.2.3 A forced-ventilation oven and a 2-h heating period at105C ar
9、e used in Test Method B.3.Significance and Use3.1 The nonvolatile content of resin solutions is useful tocoatings producers and users for the determination of the totalsolids available for film formation and for the estimation of thevolatile organic content.TEST METHOD ANON-HEAT-REACTIVE RESINSOLUTI
10、ONS4.Apparatus4.1 Ovens:4.1.1 Gravity-convection type,maintained at 105 6 2C,with vents open.4.1.2 Forced-ventilation type,maintained at 105 6 2C.Forovens with adjustable air flow rate,set the control damper at50%.4.2 Aluminum or Tin Foil,from 38 to 50 m(0.0015 to0.0020 in.)in thickness.Either one p
11、iece 150 by 300 mm(6 by12 in.),or two 150 by 150-mm(6 by 6-in.)pieces may be used.The foil must be perfectly smooth;if it becomes wrinkledduring the initial handling,roll smooth as directed in 5.2.4.3 Plate GlassTwo pieces about 5 mm(316in.)thick;onepiece 140 by 140 mm(512by 512in.)and one piece 180
12、 by 180mm(7 by 7 in.).4.4 Device for Weighing Specimens2Apparatus that willprevent loss of volatile matter during the weighing operationsuch as any of the following,or equivalent:4.4.1 Syringe,Luer,2 or 5-mL capacity,4.4.2 Weighing Buret,Smith,10-mL capacity,or4.4.3 Bulb Pipet,dropping,with 50-mL Er
13、lenmeyer flask.1These test methods are under the jurisdiction of ASTM Committee D01 onPaint and Related Coatings,Materials,and Applications and are the directresponsibility of Subcommittee D01.21 on Chemical Analysis of Paints and PaintMaterials.Current edition approved June 1,2012.Published July 20
14、12.Originally approvedin 1953.Last previous edition approved in 2006 as D1259 06.DOI:10.1520/D1259-06R12.2The bulb pipet is available from most scientific supply houses.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.5 Roller,for Smooth
15、ing FoilUse a ground and polishedcylinder,preferably stainless steel,approximately 7 in.(180mm)long and 2 in.(50 mm)in diameter.4.6 Foil Trays,two types as follows:4.6.1 Trays measuring 165 by 300 mm(612by 12 in.),foruse with(6 by 12-in.)foil,constructed from No.22-gauge0.6mm aluminum sheet in accor
16、dance with dimensions shownin Fig.1.Several trays may be stacked in the oven to permitrunning several specimens simultaneously.4.6.2 Trays measuring 165 by 165 mm(612by 612in.),foruse with(6 by 6-in.)foil,with holder,shall be constructed fromNo.22-gauge aluminum sheet,as shown in Fig.2.5.Procedure5.1 Use the following procedure with the 150 by 300-mm(6 by 12-in.)foil sheets and the 165 by 300-mm(612by12-in.)trays.Alternatively two 150 by 150-mm(6 by 6-in.)foilsheets may be used in a similar mann
