ASTM D1786-10

Standard Specification for Toluene Diisocyanate

ABSTRACT
This specification covers toluene diisocyanate used as an ingredient in the production of polyurethane cellular materials. The three classes of toluene diisocyanate covered in this specification are based on isomer ratio, and the three types are based on acidity and hydrolyzable chloride. Materials shall be tested and the individual grades shall conform to specified values of isomer ratio, purity, APHA color, and total chlorine.
SCOPE
1.1 This specification covers toluene diisocyanate used as an ingredient in the production of polyurethane materials.
Note 1—The properties included in this specification are those required to characterize toluene diisocyanate. Other requirements are possible and will be 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 responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 2—There is no known ISO equivalent to this standard.

General Information

• Status: Historical
• Publication Date: 14-Jan-2010
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.22 - Cellular Materials - Plastics and Elastomers

Relations

• Replaces: ASTM D1786-01(2006)e1 - Standard Specification for Toluene Diisocyanate
• Effective Date: 15-Jan-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D1786 −10
StandardSpecification for
1
Toluene Diisocyanate
This standard is issued under the fixed designation D1786; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 2.2 Federal Standard:
3
49 CFR Transportation Part 172.01
1.1 This specification covers toluene diisocyanate used as
an ingredient in the production of polyurethane materials.
3. Terminology
NOTE1—Thepropertiesincludedinthisspecificationarethoserequired
3.1 Definitions—For definitions of terms used in this
to characterize toluene diisocyanate. Other requirements are possible and
specification, see Terminology D883.
will be added as the necessary test methods become available.
4. Classification
1.2 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.1 This specification covers three classes of toluene
responsibility of the user of this standard to establish appro-
diisocyanates, based on isomer ratio as described in Table 1.
priate safety and health practices and determine the applica-
4.2 Each class is subdivided into three types on the basis of
bility of regulatory limitations prior to use.
acidity and hydrolyzable chloride differences as follows:
NOTE 2—There is no known ISO equivalent to this standard.
4.2.1 TypeIorA—Acidity shall be less than 0.0045 ex-
pressed as percent HCl. Hydrolyzable chloride shall be less
2. Referenced Documents
than 0.01 %.
2
4.2.2 Type II or B—Acidity shall be between 0.0070 and
2.1 ASTM Standards:
0.012expressedaspercentHCl.Hydrolyzablechlorideshallbe
D883 Terminology Relating to Plastics
less than 0.015 %.
D4660 Test Methods for Polyurethane Raw Materials: De-
4.2.3 Type III or C—Acidity shall be greater than 0.012
termination of the Isomer Content of Toluenediisocyanate
expressed as percent HCl. Hydrolyzable chloride limits are set
D4661 Test Methods for Polyurethane Raw Materials: De-
at the convenience of the supplier and purchaser.
termination of Total Chlorine in Isocyanates
4.2.4 Toluene diisocyanate that has an acidity value that
D4663 Test Method for Polyurethane Raw Materials: Deter-
falls between Type I (Type A) and Type II (Type B)isnot
mination of Hydrolyzable Chlorine of Isocyanates
currently included in this specification.
D4877 Test Method for Polyurethane Raw Materials: Deter-
mination of APHA Color in Isocyanates
5. Requirements
D5155 Test Methods for Polyurethane Raw Materials: De-
5.1 These materials shall conform to the requirements
termination of the Isocyanate Content ofAromatic Isocya-
prescribed in Table 1.
nates
D5629 Test Method for Polyurethane Raw Materials: Deter-
6. Sampling and Test Methods
mination ofAcidity in Low-AcidityAromatic Isocyanates
6.1 The materials shall be sampled and tested in accordance
and Polyurethane Prepolymers
withTest Methods D4660, D4661, D4663, D4877, D5155, and
D5629.
1
This specification is under the jurisdiction of ASTM Committee D20 on
7. Retest and Rejection
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
7.1 If any failure occurs, it is acceptable to retest the
Materials - Plastics and Elastomers.
Current edition approved Jan. 15, 2010. Published February 2010. Originally
material to establish conformity to the specification approved
ε1
approved in 1960. Last previous edition approved in 2006 as D1786 - 01(2006) .
by the purchaser and the supplier.
DOI: 10.1520/D1786-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
3
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Code of Federal Regulation is available from U.S. Government Printing Office
Standards volume information, refer to the standard’s Document Summary page on Superintendent of Documents, 732 N. Capitol St., NW, Mail Stop: SDE,
the ASTM website. Washington, DC 20401.
*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
1

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D1786−10
TABLE 1 Detail Requirements for Toluene Diisocyanate
8.2 Marking—Shipping containers/documents shall be
Class marked with the name of the material, the type of material, and
100 80 65
the quantity contained therein. Include the necessary hazard
labels as defined by the Department of Transportation for this
Isomer ratio, 2, 4 isomer, % 97.5 min 80 ± 2 65 ± 2
material, the number of the contact or order, and the manufac-
Purity, min, % 99.5 99.5 99.5
turer’s name and emergency telephone number in case of
APHA color, max 50 50
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it 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 version
of the standard as published by ASTM is to be considered the official document.
´1
Designation:D1786–01 (Reapproved 2006) Designation: D1786 – 10
Standard Specification for
1
Toluene Diisocyanate
This standard is issued under the fixed designation D1786; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
´ NOTE—Replaced reference to D 4667 with D 5629 in March 2006.
1. Scope*
1.1 This specification covers toluene diisocyanate used as an ingredient in the production of polyurethane cellular materials.
NOTE 1—The properties included in this specification are those required to characterize toluene diisocyanate. Other requirements may become
necessary are possible and will be added as the necessary test methods become available.
1.2 The following precautionary caveat pertains only to the test methods portion, Section 6, of this specification: This standard
does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this
standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
NOTE2—There is no equivalent ISO standard. 2—There is no known ISO equivalent to this standard.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D4660 Test Methods for Polyurethane Raw Materials: Determination of the Isomer Content of Toluenediisocyanate
D4661 Test Methods for Polyurethane Raw Materials: Determination of Total Chlorine in Isocyanates
D4663 Test Method for Polyurethane Raw Materials: Determination of Hydrolyzable Chlorine of Isocyanates
D4877 Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
D5155 Test Methods for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic Isocyanates
D5629 Test Method for Polyurethane Raw Materials: Determination of Acidity in Low-Acidity Aromatic Isocyanates and
Polyurethane Prepolymers
1
This specification is under the jurisdiction ofASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular Materials—Plastics
and Elastomers.
Current edition approved March 15, 2006. Published June 2006. Originally approved in 1960. Last previous edition approved in 2001 as D1786-01. DOI:
10.1520/D1786-01R06E01.on Cellular Materials - Plastics and Elastomers.
´1
Current edition approved Jan. 15, 2010. Published February 2010. Originally approved in 1960. Last previous edition approved in 2006 as D1786 - 01(2006) . DOI:
10.1520/D1786-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*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.
1

---------------------- Page: 1 ----------------------
D1786 – 10
2.2 Federal Standard:
3
49 CFR Transportation Part 172.01
3. Terminology
3.1 Definitions—For definitions of terms used in this specification, see Terminology D883.
4. Classification
4.1This specification covers three classes of toluene diisocyanates, based on isomer ratio, and three types based on acidity and
hydrolyzable chloride.
4.2Each class may be subdivided into three types on the basis of acidity differences as follows:
4.2.1
4.1 This specification covers three classes of toluene diisocyanates, based on isomer ratio 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 TypeIorA—Acidity shall be between 0.0015 and less than 0.0045 determinedexpressed as percent HCl. Hydrolyzable
chloride shall be less than 0.01 %.
4.2.2 Type II or B—Acidity shall be between 0.0070 and 0.012 expressed as percent HCl. Hydrolyzable chloride shall be less
than 0.015 %.
4.2.3 Type III or C—Acidity shall be greater than 0.012 as percent HCl. Hydrolyzable chloride limits may be set at the
convenience of the supplier and purchaser. —Acidity shall be greater than 0.012 expressed as percent HCl. Hydrolyzable chloride
limits are set at the convenience of the supplier and purchaser.
4.2.4 Toluene diisocyanate that has an acidity value that falls b
...