1、Designation: D1786 10Standard 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 indic
2、ates the 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.NOTE 1The properties included in this specificati
3、on are those re-quired to characterize toluene diisocyanate. Other requirements arepossible and will be added as the necessary test methods becomeavailable.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
4、 this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 2There is no known ISO equivalent to this standard.2. Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD4660 Test Methods for
5、Polyurethane Raw Materials: 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: De-termination of Hydrolyzable Chlorine of IsocyanatesD4877 Test
6、Method for Polyurethane Raw Materials: De-termination of APHA Color in IsocyanatesD5155 Test Methods for Polyurethane Raw Materials: De-termination of the Isocyanate Content of Aromatic Isocy-anatesD5629 Test Method for Polyurethane Raw Materials: De-termination of Acidity in Low-Acidity Aromatic Is
7、ocyan-ates and Polyurethane Prepolymers2.2 Federal Standard:49 CFR Transportation Part 172.0133. Terminology3.1 DefinitionsFor definitions of terms used in this speci-fication, see Terminology D883.4. Classification4.1 This specification covers three classes of toluene diiso-cyanates, based on isome
8、r ratio as described in Table 1.4.2 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 0.0045expressed as percent HCl. Hydrolyzable chloride shall be lessthan 0.01 %.4.2.2 Type II or BAcidity s
9、hall be between 0.0070 and0.012 expressed 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 th
10、at has an acidity value thatfalls between Type I (Type A) and Type II (Type B)isnotcurrently 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 accordanc
11、ewith Test Methods D4660, D4661, D4663, D4877, 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 Committ
12、ee D20 onPlastics and is the direct responsibility of Subcommittee D20.22 on CellularMaterials - Plastics and Elastomers.Current edition approved Jan. 15, 2010. Published February 2010. Originallyapproved in 1960. Last previous edition approved in 2006 as D1786 - 01(2006)1.DOI: 10.1520/D1786-10.2For
13、 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.3Code of Federal Regulation is available from U.S. Government Pri
14、nting OfficeSuperintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washing-ton, DC 20401.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.8. Packaging and
15、 Package Marking8.1 PackagingThe material shall be packaged in standardcommercial containers 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 OSHA4a
16、nd EPA5regulations to determine their applicability to this material.8.2 MarkingShipping containers/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 t
17、hismaterial, 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
18、 OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue(D1786 - 01(2006)1) that may impact the use of this standard. (January 15, 2010)(1) Revised 1.1, 1.2, 4.1, 4.2, 4.2.1, 4.2.2, 4.2.3, 7.1, 8.1, 8.2,Note 1, and Note 2.(2) Added 4.2.4.ASTM Int
19、ernational takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirel
20、y their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand sh
21、ould be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on St
22、andards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 61
23、0-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).4Available from U.S. Department of Labor, OSHA, 200 Constitution Ave. NW,Was
24、hington, DC 20210.5Available from United States Environmental Protection Association (EPA),Ariel Rios Bldg., 1200 Pennsylvania Ave., NW, Washington, DC 20460.TABLE 1 Detail Requirements for Toluene DiisocyanateClass100 80 65Isomer ratio, 2, 4 isomer, % 97.5 min 80 6 2656 2Purity, min, % 99.5 99.5 99.5APHA color, max 50 50 50Total chlorine, max, % 0.2 0.2 0.2D1786 102
