ASTM D1786-01(2006)e1

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 cellular materials. The properties included in this specification are those required to characterize toluene diisocyanate. Other requirements may become necessary and will be added as the necessary test methods become available.
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.Note 1
There is no equivalent ISO standard.

General Information

• Status: Historical
• Publication Date: 14-Mar-2006
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.22 - Cellular Materials - Plastics and Elastomers

Relations

• Replaces: ASTM D1786-01 - Standard Specification for Toluene Diisocyanate
• Effective Date: 15-Mar-2006
• Replaced By: ASTM D1786-10 - 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
´1
Designation: D1786 – 01 (Reapproved 2006)
Standard Specification for
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.
´ NOTE—Replaced reference to D 4667 with D 5629 in March 2006.
1. Scope* termination of the Isocyanate Content of Aromatic Isocy-
anates
1.1 This specification covers toluene diisocyanate used as
D5629 Test Method for Polyurethane Raw Materials: De-
an ingredient in the production of polyurethane cellular mate-
termination of Acidity in Low-Acidity Aromatic Isocyan-
rials.
ates and Polyurethane Prepolymers
NOTE 1—The properties included in this specification are those re-
2.2 Federal Standard:
quired to characterize toluene diisocyanate. Other requirements may
49 CFR Transportation Part 172.01
becomenecessaryandwillbeaddedasthenecessarytestmethodsbecome
available.
3. Terminology
1.2 The following precautionary caveat pertains only to the
3.1 Definitions—For definitions of terms used in this speci-
test methods portion, Section 6, of this specification: This
fication, see Terminology D883.
standard does not purport to address all of the safety concerns,
if any, associated with its use. It is the responsibility of the user
4. Classification
of this standard to establish appropriate safety and health
4.1 This specification covers three classes of toluene diiso-
practices and determine the applicability of regulatory limita-
cyanates, based on isomer ratio, and three types based on
tions prior to use.
acidity and hydrolyzable chloride.
4.2 Each class may be subdivided into three types on the
NOTE 2—There is no equivalent ISO standard.
basis of acidity differences as follows:
2. Referenced Documents
4.2.1 TypeIor A—Acidity shall be between 0.0015 and
2.1 ASTM Standards: 0.0045 determined as percent HCl. Hydrolyzable chloride shall
be less than 0.01 %.
D883 Terminology Relating to Plastics
D4660 Test Methods for Polyurethane Raw Materials: De- 4.2.2 Type II or B—Acidity shall be between 0.0070 and
0.012 as percent HCl. Hydrolyzable chloride shall be less than
termination of the Isomer Content of Toluenediisocyanate
D4661 Test Methods for Polyurethane Raw Materials: De- 0.015 %.
4.2.3 Type III or C—Acidity shall be greater than 0.012 as
termination of Total Chlorine in Isocyanates
D4663 Test Method for Polyurethane Raw Materials: De- percent HCl. Hydrolyzable chloride limits may be set at the
convenience of the supplier and purchaser.
termination of Hydrolyzable Chlorine of Isocyanates
D4877 Test Method for Polyurethane Raw Materials: De-
5. Requirements
termination of APHA Color in Isocyanates
5.1 These materials shall conform to the requirements
D5155 Test Methods for Polyurethane Raw Materials: De-
prescribed in Table 1.
6. Sampling and Test Methods
This specification is under the jurisdiction of ASTM Committee D20 on
Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular
6.1 The materials shall be sampled and tested in accordance
Materials—Plastics and Elastomers.
withTest Methods D4660, D4661, D4663, D4877, D5155, and
Current edition approved March 15, 2006. Published June 2006. Originally
approved in 1960. Last previous edition approved in 2001 as D1786 - 01. DOI:
D5629.
10.1520/D1786-01R06E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
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