ASTM_D_4277_-_83_1998.pdf

Designation:D 4277 83(Reapproved 1998)Standard Guide forTesting Amino Resins1This standard is issued under the fixed designation D 4277;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(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide covers test methods suitable for testingheat-reactive nitrogen resins,particularly urea-formaldehydeand melamine-formaldehyde resins.The test methods used arelisted in Table 1.2.Referenced Documents2.1 ASTM Standards:D 883 Terminology Relating to Plastics2D 1013 Test Method for Determining Total Nitrogen inResins and Plastics3D 1198 Test Method for Solvent Tolerance of Amine Res-ins3D 1209 Test Method for Color of Clear Liquids(Platinum-Cobalt Scale)4D 1259 Test Methods for Nonvolatile Content of ResinSolutions5D 1475 Test Method for Density of Paint,Varnish,Lacquer,and Related Products5D 1545 Test Method for Viscosity of Transparent Liquidsby Bubble Time Method3D 1639 Test Method for Acid Value of Organic CoatingMaterials3D 3278 Test Methods for Flash Point of Liquids by SmallScale Closed-Cup Apparatus53.Terminology3.1 DefinitionThe following definition is taken from Ter-minology D 883:3.1.1 amino resina resin made by polycondensation of acompound containing amino groups such as urea or melaminewith an aldehyde,such as formaldehyde,or an aldehyde-yielding material.4.Significance and Use4.1 This guide summarizes the currently available ASTMtest methods useful for testing amino resins.These testmethods may be used by producers and users to characterize avariety of properties of nitrogen resins related to their qualityand safe use.5.Total Nitrogen5.1 Test Method D 1013 is a standard Kjeldahl procedurefor nitrogen determination,directly applicable to amino resinsand solutions thereof.6.Solvent Tolerance6.1 The amount of hydrocarbon that an amino resin toleratesis measured in accordance with Test Method D 1198.The endpoint of this titration,a defined degree of turbidity,is sensitiveto both the alkylation and degree of polymerization of theamino resin.7.Color7.1 The color of solutions of amino resins can be measuredusing the platinum-cobalt scale according to the procedure inTest Method D 1209.8.Nonvolatile Content8.1 The nonvolatile content of amino resins is measuredusing Test Methods D 1259,Method B,which applies to heatreactive resin solutions and requires a longer drying time.Avery thin film,created by pressing a resin specimen betweensheets of aluminum foil,is dried for 2 h and weighed.Theremay be some reaction of amino resins during the dryingprocedure,but the repeatability(0.7%absolute)and reproduc-ibility(1.7%absolute)are acceptable.9.Density9.1 Test Method D 1475 is a general-purpose test methodfor determination of density using a pycnometer or cup.It isfully applicable to amino resins.10.Viscosity10.1 Viscosity of amino resins is determined in bubble1This guide is under the jurisdiction of ASTM Committee D-1 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.33 on Polymers and Resins.Current edition approved Aug.26,1983.Published October 1983.2Annual Book of ASTM Standards,Vol 08.01.3Annual Book of ASTM Standards,Vol 06.03.4Annual Book of ASTM Standards,Vol 06.04.5Annual Book of ASTM Standards,Vol 06.01.TABLE 1 Methods for Testing Nitrogen ResinsTest MethodSectionASTM DesignationTotal nitrogen in resins and plastics5D 1013Solvent tolerance of amino resins6D 1198Color of clear liquids7D 1209Nonvolatile content resin solutions8D 1259Density9D 1475Viscosity10D 1545Acid value11D 1639Flash point12D 32781AMERICAN SOCIETY FOR TESTING AND MATERIALS100 Barr Harbor Dr.,West Conshohocken,PA 19428Reprinted from the Annual Book of ASTM Standards.Copyright ASTMseconds,approximately equal to stokes,using standard viscos-ity tubes as described in Test Method D 1545.11.Acid Value11.1 Test Method D 1639,which describes titration of aresin specimen with standard potassium hydroxide,is suitablefor determining the acid value of amino resins.12.Flash Point12.1 Test Methods D 3278 provide for either a flash/no flashor finite flash point determination using the Setaflash closedtester.It is applicable only when the material to be tested hasa flash point between 0 and 110C and a viscosity lower than150 St at 25C.13.Keywords13.1 amino resin;solvent tolerance;total nitrogenThe American Society for Testing and Materials takes no position respecting the validity of any patent rights asserted in connectionwith any item mentioned in this standard.Users of this standard are expressly advised that determination of the validity of any suchpatent rights,and the risk of infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be revie