ASTM_D_7767_-_11.pdf

Designation:D776711Standard Test Method toMeasure Volatiles from Radiation Curable AcrylateMonomers,Oligomers,and Blends and Thin Coatings Madefrom Them1This standard is issued under the fixed designation D7767;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 describes a means to determine thepercentage of processing,potential,and total volatiles fromradiation curable acrylate monomers,oligomers,and blends.The results can be used to estimate the volatiles from thinradiation curable coatings that cannot otherwise be measuredwith the restriction that those coatings are not subjected to apre-exposure water or solvent drying step.It also provides ameans to determine the volatiles of thin radiation curablecoatings in the absence of known interferences such aspigments in inks.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D5403 Test Methods for Volatile Content of Radiation Cur-able MaterialsE145 Specification for Gravity-Convection and Forced-Ventilation OvensE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 Other Document:3EPA Method 24 Determination of Volatile Matter Content,Water Content,Density,Volume Solids,and Weight Solidsof Surface Coatings3.Terminology3.1 Definitions:3.1.1 cure,nconversion of a coating from its applicationstate to its final use state measured by tests generally related toend use performance and mutually agreeable to supplier andpurchaser.3.1.2 electron beam(EB)curing,nconversion of a coatingfrom its application state to its final use state by means of amechanism initiated by electron impingement generated byequipment designed for that purpose.3.1.3 pigment,nan insoluble substance added to a formu-lation to modify the visual appearance of a coating made fromthe formulation.3.1.4 potential volatiles,nthe percentage loss in specimenweight upon heating at 110C for 60 min after radiation curing.3.1.5 processing volatiles,nthe percentage loss in speci-men weight under process conditions that are designed tosimulate actual industrial cure processing conditions.3.1.6 retained weight,nthe mass of specimen remainingafter exposing to the UV source,heating in an oven,or both.3.1.7 thin,adjless than 15 micrometres in thickness.3.1.8 total volatiles,nthe percentage loss in specimenweight under process conditions that are designed to simulateactual industrial cure processing conditions and after heating at110C for 60 min.3.1.9 ultraviolet(UV)curing,nconversion of a coatingfrom its application state to its final use state by means of amechanism initiated by ultraviolet radiation in the range from200 to 400 nm generated by equipment designed for thatpurpose.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.Current edition approved Nov.1,2011.Published November 2011.DOI:10.1520/D7767-11.2For 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.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.10 UVA,nthe region of the electromagnetic spectrumcomprising wavelengths falling in the range between 320 and390 nm.4.Summary of Test Method4.1 A designated quantity of an acrylate-functional material(test specimen)is weighed in a container lid before and after aUV exposure step sufficient to ensure a thorough cure of thetest specimen to obtain the percent solids retained.Thecalculated percentage weight loss is attributed to processvolatiles.The test specimen and container lid are weighedagain after heating for 60 min at 110 6 5C to obtain thepercent solids retained.Any additional weight loss is attributedto potential volatiles.The total volatiles for a test specimen arethe difference between the initial sample mass and the retainedmass after exposing and heating divided by