ASTM_D_4426_-_01_2021.pdf

Designation:D442601(Reapproved 2021)Standard Test Method forDetermination of Percent Nonvolatile Content of LiquidPhenolic Resins Used for Wood Laminating1This standard is issued under the fixed designation D4426;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 parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the recommended procedure forthe determination of the nonvolatile or total solids content ofliquid phenolic resins used for wood laminating.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D907 Terminology of AdhesivesD1582 Test Method for Nonvolatile Content of LiquidPhenol,Resorcinol,and Melamine Adhesives3.Terminology3.1 DefinitionsMany of the terms in this test method aredefined in Terminology D907.4.Summary of Test Method4.1 A weighed specimen is oven-dried,cooled in adesiccator,and weighed.The percent nonvolatile content iscalculated,based on the amount remaining.5.Significance and Use5.1 This test method is intended as a fast and economicaldetermination of the nonvolatile content of liquid phenolicresins used for wood laminating and is useful for generalcomparative purposes.For greater precision and accuracy,TestMethod D1582 is recommended.6.Apparatus6.1 Disposable Aluminum Foil Dishes,60-mm(2.4-in.)diameter by 16-mm(0.60-in.)depth.NOTE1A glass dish may be used if the pH of the resin is greater thanten.6.2 Desiccator,charged with Drierite or equivalent desic-cant.6.3 Mechanical Convection Oven.6.4 Analytical Balance,accurate to 60.1 mg(0.000002 lb).6.5 Eye Droppers,or Dropping Pipettes,2-mL capacity.6.6 Anemometer.6.7 Stainless Steel Trays,fabricated 30 gauge,83 by 250mm(3.25 by 9.8 in.),with 19-mm(0.75-in.)sides and openends.6.8 Modified Oven Shelves,fitted with fabricated 18-gauge19 by 19-mm(0.75 by 0.75-in.)stainless steel angle stoppositioned 108 mm(4.25 in.)from back edge.Shelf-stopensures consistent solids dish placement and prevents place-ment at the rear of the oven where airflow is erratic.6.9 Laboratory Hotplate,with heating capacity to 270C(518F).7.Oven Setup and Periodic Check Specifications7.1 Specifications:7.1.1 Intake Port6.4 mm(0.25 in.)open.7.1.2 Exhaust Port6.4 mm(0.25 in.)open.7.1.3 Internal Airflow91.4 6 1 m/min(300 6 3 ft/min)at40C(104F).7.1.4 Temperature125 6 1C(257 6 2F).7.2 A 6.4-mm(0.25-in.)metal spacer is a convenient toolfor setting port openings.1This test method is under the jurisdiction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.30 on WoodAdhesives.Current edition approved April 1,2021.Published April 2021.Originallyapproved in 1984.Last previous edition approved in 2013 as D4426 01(2013).DOI:10.1520/D4426-01R21.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.17.3 Measure with Davis-type anemometer placed as close aspossible to the geometric center of the cavity with the doorshut.7.4 Set the oven temperature at 125C(257F)and recordthe actual temperature for a period of 2 h.The control rangeshall be 61C(2F)during the check period.8.Sampling8.1 Take a representative sample of the lot of resin beingevaluated of a sufficient quantity for the tests.While the testsconsume less than 5 g(0.01 lb)of resin,a sample of at least250 g(0.55 lb)is recommended to ensure that it is represen-tative and that rechecks can be made if desired.8.2 To ensure that surface evaporation of solvent does notaffect the accuracy of the results,mix the resin samplethoroughly just prior to the test.9.Sample Dish Pr