1、Designation:D178616Standard Specification forToluene Diisocyanate1This standard is issued under the fixed designation D1786;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 t
2、he year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification covers toluene diisocyanate used asan ingredient in the production of polyurethane materials.NOTE1The properties included in this specification are thos
3、e requiredto characterize toluene diisocyanate.Other requirements are possible andwill be added as the necessary test methods become available.1.2 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 t
4、o establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE2There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD4660 Test Methods for Polyurethane Raw M
5、aterials:De-termination of the Isomer Content of ToluenediisocyanateD4661 Test Methods for Polyurethane Raw Materials:De-termination of Total Chlorine in IsocyanatesD4663 Test Method for Polyurethane Raw Materials:Deter-mination of Hydrolyzable Chlorine of IsocyanatesD4877 Test Method for Polyuretha
6、ne Raw Materials:Deter-mination of APHA Color in IsocyanatesD5155 Test Methods for Polyurethane Raw Materials:De-termination of the Isocyanate Content ofAromatic Isocya-natesD5629 Test Method for Polyurethane Raw Materials:Deter-mination of Acidity in Low-Acidity Aromatic Isocyanatesand Polyurethane
7、 Prepolymers2.2 Federal Standard:49 CFR Transportation Part 172.0133.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,see Terminology D883.4.Classification4.1 This specification covers three classes of toluenediisocyanates,based on isomer ratio as described in Table 1.4.2
8、 Each class is subdivided into three types on the basis ofacidity and hydrolyzable chloride differences as follows:4.2.1 Type I or AAcidity shall be less than 0.005 ex-pressed as percent HCl.Hydrolyzable chloride shall be lessthan 0.01%.4.2.2 Type II or BAcidity shall be between 0.0070 and0.012 expr
9、essed as percent HCl.Hydrolyzable chloride shall beless than 0.015%.4.2.3 Type III or CAcidity shall be greater than 0.012expressed as percent HCl.Hydrolyzable chloride limits are setat the convenience of the supplier and purchaser.4.2.4 Toluene diisocyanate that has an acidity value thatfalls betwe
10、en Type I(Type A)and Type II(Type B)is notcurrently included in this specification.5.Requirements5.1 These materials shall conform to the requirementsprescribed in Table 1.6.Sampling and Test Methods6.1 The materials shall be sampled and tested in accordancewith Test Methods D4660,D4661,D4663,D4877,
11、D5155,andD5629.7.Retest and Rejection7.1 If any failure occurs,it is acceptable to retest thematerial to establish conformity to the specification approvedby the purchaser and the supplier.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility
12、 of Subcommittee D20.22 on CellularMaterials-Plastics and Elastomers.Current edition approved April 1,2016.Published April 2016.Originallyapproved in 1960.Last previous edition approved in 2010 as D1786-10.DOI:10.1520/D1786-16.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcont
13、act ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Code of Federal Regulation is available from U.S.Government Printing OfficeSuperintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,
14、Washington,DC 20401.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 8.Packaging and Package Marking8.1 PackagingThe material shall be packaged in standardcommercial containe
15、rs so constructed as to ensure compliancewith Department of Transportation standards for such contain-ers and shall be suitable for safe transportation at the lowestrate to the point of delivery.Consult OSHA4and EPA5regulations to determine their applicability to this material.8.2 MarkingShipping co
16、ntainers/documents shall bemarked with the name of the material,the type of material,andthe quantity contained therein.Include the necessary hazardlabels as defined by the Department of Transportation for thismaterial,the number of the contact or order,and the manufac-turers name and emergency telephone number in case ofaccident.Consult OSHA4and EPA5regulations to determinetheir applicability to this material.9.Keywords9.1 polyurethane;raw materials;specification;TDI;toluenediisocyanateSUMMARY O
