Designation:D4670−17StandardTestMethodforPolyurethaneRawMaterials:DeterminationofSuspendedMatterinPolyols1ThisstandardisissuedunderthefixeddesignationD4670;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversaprocedureforvisualinspec-tiontodeterminethepresenceofinsolubleforeignmaterialinpolyols.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—ThereisnoknownISOequivalenttothisstandard.2.ReferencedDocuments2.1ASTMStandards:2D883TerminologyRelatingtoPlastics3.Terminology3.1TerminologyinthistestmethodisinaccordancewithTerminologyD883.4.SignificanceandUse4.1Thistestmethodissuitableasaqualitycontrolorspecificationtest.5.Procedure5.1Invertacolorless,transparentglassbottlecontainingthewell-mixedsampleandexaminebytransmittedlightforthepresenceofsuspendedmatter.6.Report6.1Reportthepresenceorabsenceofsuspendedmatter.7.PrecisionandBias7.1Nostatementismadeabouttheprecisionorthebiassincethistestmethodmerelystateswhethersuspendedmatterisdetectedornot.8.Keywords8.1polyols;polyurethanerawmaterials;suspendedmatterSUMMARYOFCHANGESCommitteeD20hasidentifiedthelocationofselectedchangestothisstandardsincethelastissue(D4670–07(2012)ɛ1)thatmayimpacttheuseofthisstandard.(March1,2017)(1)Modified7.1toprovideclearerinstruction.1ThistestmethodisunderthejurisdictionofASTMCommitteeD20onPlasticsandisthedirectresponsibilityofSubcommitteeD20.22onCellularMaterials-PlasticsandElastomers.ItwasrecommendedtoASTMbytheCenterforthePolyurethanesIndustryPolyurethaneRawMaterialAnalysisWorkgroup.CurrenteditionapprovedMarch1,2017.PublishedMarch2017.Originallyapprovedin1987.Lastpr...
