1、Designation: D1786 10D1786 16Standard 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 parenthes
2、es indicates 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 as an ingredient in the production of polyurethane materials.NOTE 1The properties included in this sp
3、ecification are those required to characterize toluene diisocyanate. Other requirements are possible and willbe added as the necessary test methods become available.1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof t
4、he user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations 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 Metho
5、ds for Polyurethane Raw Materials: Determination of the Isomer Content of ToluenediisocyanateD4661 Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in IsocyanatesD4663 Test Method for Polyurethane Raw Materials: Determination of Hydrolyzable Chlorine of IsocyanatesD4877 T
6、est Method for Polyurethane Raw Materials: Determination of APHA Color in IsocyanatesD5155 Test Methods for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic IsocyanatesD5629 Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Is
7、ocyanates andPolyurethane Prepolymers2.2 Federal Standard:49 CFR Transportation Part 172.0133. Terminology3.1 DefinitionsFor definitions of terms used in this specification, see Terminology D883.4. Classification4.1 This specification covers three classes of toluene diisocyanates, based on isomer ra
8、tio as described in Table 1.4.2 Each class is subdivided into three types on the basis of acidity and hydrolyzable chloride differences as follows:4.2.1 Type I or AAcidity shall be less than 0.00450.005 expressed as percent HCl. Hydrolyzable chloride shall be less than0.01 %.4.2.2 Type II or BAcidit
9、y shall be between 0.0070 and 0.012 expressed as percent HCl. Hydrolyzable chloride shall be lessthan 0.015 %.4.2.3 Type III or CAcidity shall be greater than 0.012 expressed as percent HCl. Hydrolyzable chloride limits are set at theconvenience of the supplier and purchaser.1 This specification is
10、under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plasticsand Elastomers.Current edition approved Jan. 15, 2010April 1, 2016. Published February 2010April 2016. Originally approved in 1960. Last previous edition a
11、pproved in 20062010 asD1786 - 01D1786 - 10.(2006) 1. DOI: 10.1520/D1786-10.10.1520/D1786-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Su
12、mmary page on the ASTM website.3 Code of Federal Regulation is available from U.S. Government Printing Office Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE, Washington,DC 20401.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an
13、 indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to
14、 be considered the official document.*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 States14.2.4 Toluene diisocyanate that has an acidity value that falls between Type I (Type
15、 A) and Type II (Type B) is not currentlyincluded in this specification.5. Requirements5.1 These materials shall conform to the requirements prescribed in Table 1.6. Sampling and Test Methods6.1 The materials shall be sampled and tested in accordance with Test Methods D4660, D4661, D4663, D4877, D51
16、55, andD5629.7. Retest and Rejection7.1 If any failure occurs, it is acceptable to retest the material to establish conformity to the specification approved by thepurchaser and the supplier.8. Packaging and Package Marking8.1 PackagingThe material shall be packaged in standard commercial containers
17、so constructed as to ensure compliance withDepartment of Transportation standards for such containers and shall be suitable for safe transportation at the lowest rate to thepoint of delivery. Consult OSHA4 and EPA5 regulations to determine their applicability to this material.8.2 MarkingShipping con
18、tainers/documents shall be marked with the name of the material, the type of material, and thequantity contained therein. Include the necessary hazard labels as defined by the Department of Transportation for this material,the number of the contact or order, and the manufacturers name and emergency
19、telephone number in case of accident. ConsultOSHA4 and EPA5 regulations to determine their applicability to this material.9. Keywords9.1 polyurethane; raw materials; specification; TDI; toluene diisocyanateSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standa
20、rd since the last issue(D1786 - 01D1786 - 10(2006)1) that may impact the use of this standard. (January 15, 2010)(April 1, 2016)(1) RevisedSubsection 1.1, 1.2, 4.1, 4.2, 4.2.1,: 4.2.2,ClassificationChanged 4.2.3,lower 7.1,specification 8.1,from 8.2,0.0045Note 1, and to 0.005.Note 2.(2) Added 4.2.4.4
21、 Available from U.S. Department of Labor, OSHA, 200 Constitution Ave. NW, Washington, DC 20210.5 Available 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
22、 65Isomer ratio, 2, 4 isomer, % 97.5 min 80 2 65 2Purity, min, % 99.5 99.5 99.5APHA color, max 50 50 50Total chlorine, max, % 0.2 0.2 0.2D1786 162ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of
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25、mittee, 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 Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 1
26、9428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 163
