ASTM D1786-96

Standard Specification for Toluene Diisocyanate

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 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.
Note 2—There is no equivalent ISO standard.

General Information

• Status: Historical
• Publication Date: 09-Nov-2001
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.22 - Cellular Materials - Plastics and Elastomers

Relations

• Replaced By: ASTM D1786-01 - Standard Specification for Toluene Diisocyanate
• Effective Date: 10-Nov-2001

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 1786 – 96 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Toluene Diisocyanate
This standard is issued under the fixed designation D 1786; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope 2.2 Federal Standard:
49 CFR Transportation Part 172.01
1.1 This specification covers toluene diisocyanate used as
an ingredient in the production of polyurethane cellular mate-
3. Terminology
rials.
3.1 Defintions—For definitions of terms used in this speci-
NOTE 1—The properties included in this specification are those re-
fication, see Terminology D 883.
quired to characterize toluene diisocyanate. Other requirements may
become necessary and will be added as the necessary test methods become
4. Classification
available.
4.1 This specification covers three classes of toluene diiso-
1.2 The following precautionary caveat pertains only to the
cyanates, based on isomer ratio, and three types based on
test methods portion, Section 6, of this specification: This
acidity and hydrolyzable chloride.
standard does not purport to address all of the safety concerns,
4.2 Each class may be subdivided into three types on the
if any, associated with its use. It is the responsibility of the user
basis of acidity differences as follows:
of this standard to establish appropriate safety and health
4.2.1 TypeIor A—Acidity shall be between 0.0015 and
practices and determine the applicability of regulatory limita-
0.0045 determined as percent HCl. Hydrolyzable chloride shall
tions prior to use.
be less than 0.01 %.
4.2.2 Type II or B—Acidity shall be between 0.0070 and
NOTE 2—There is no equivalent ISO standard.
0.012 as percent HCl. Hydrolyzable chloride shall be less than
2. Referenced Documents
0.015 %.
4.2.3 Type III or C—Acidity shall be greater than 0.012 as
2.1 ASTM Standards:
D 883 Terminology Relating to Plastics percent HCl. Hydrolyzable chloride limits may be set at the
convenience of the supplier and purchaser.
D 4660 Test Methods for Polyurethane Raw Materials:
Determination of Isomer Content of Isocyanaters
5. Requirements
D 4661 Test Methods for Polyurethane Raw Materials:
5.1 These materials shall conform to the requirements
Determination of Total Chlorine in Isocyanates
prescribed in Table 1.
D 4663 Test Method for Polyurethane Raw Materials: De-
termination of Hydrolyzable Chloride of Isocyanates
6. Sampling and Test Methods
D 4667 Test Method for Polyurethane Raw Materials: De-
6.1 The materials shall be sampled and tested in accordance
termination of Acidity in Toluene Diisocyanate
with Test Methods D 4660, D 4661, D 4663, D 4667, D 4877,
D 4877 Test Methods in Polyurethane Raw Materials: De-
and D 5155.
termination of APHA Color Isocyanates
D 5155 Test Method for Polyurethane Raw Materials: De-
7. Retest and Rejection
termination of the Isocya
...