ASTM D5155-19
(Test Method)Standard Test Methods for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic Isocyanates
Standard Test Methods for Polyurethane Raw Materials: Determination of the Isocyanate Content of Aromatic Isocyanates
SIGNIFICANCE AND USE
5.1 These test methods are to be used for research or for quality control to characterize isocyanates used in polyurethane products.
SCOPE
1.1 These test methods are used to measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials.
1.1.1 Test Method A—Unheated toluene-dibutylamine determines the toluene diisocyanate content, the amine equivalent and the isocyanate content of refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. Other isomers, if present, will be included in the determination. This test method is also applicable to other isocyanates of suitable reactivity and solubility.
1.1.2 Test Method B—Heated toluene-dibutylamine determines the amine equivalent and the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene di-(4-phenylisocyanate) and polymeric (methylene phenylisocyanate).
1.1.3 Test Method C—Unheated trichlorobenzene-toluene-dibutylamine determines the amine equivalent and the isocyanate content of crude or modified isocyanates derived from toluene diisocyanate, methylene-di-(4-phenylisocyanate) and polymeric (methylene phenylisocyanate).
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
Note 1: Method C of this test method is equivalent to Method B of ISO 14896.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Buy Standard
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5155 − 19
Standard Test Methods for
Polyurethane Raw Materials: Determination of the
1
Isocyanate Content of Aromatic Isocyanates
This standard is issued under the fixed designation D5155; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 These test methods are used to measure the isocyanate
content of aromatic isocyanates used as polyurethane raw
2. Referenced Documents
materials.
2
2.1 ASTM Standards:
1.1.1 Test Method A—Unheatedtoluene-dibutylaminedeter-
D883Terminology Relating to Plastics
mines the toluene diisocyanate content, the amine equivalent
D1193Specification for Reagent Water
and the isocyanate content of refined toluene-2,4-diisocyanate
E180Practice for Determining the Precision of ASTM
and toluene-2,6-diisocyanate, or mixtures of the two. Other
Methods for Analysis and Testing of Industrial and Spe-
isomers, if present, will be included in the determination. This
3
cialty Chemicals (Withdrawn 2009)
test method is also applicable to other isocyanates of suitable
E456Terminology Relating to Quality and Statistics
reactivity and solubility.
E691Practice for Conducting an Interlaboratory Study to
1.1.2 Test Method B—Heated toluene-dibutylamine deter-
Determine the Precision of a Test Method
minestheamineequivalentandtheisocyanatecontentofcrude
E2935 Practice for Conducting Equivalence Testing in
or modified isocyanates derived from toluene diisocyanate,
Laboratory Applications
methylene di-(4-phenylisocyanate) and polymeric (methylene
2.2 ISO Standard:
phenylisocyanate).
ISO14896 Polyurethane Raw Materials-Determination of
1.1.3 Test Method C—Unheated trichlorobenzene-toluene-
Isocyanate Content
dibutylamine determines the amine equivalent and the isocya-
nate content of crude or modified isocyanates derived from
3. Terminology
toluene diisocyanate, methylene-di-(4-phenylisocyanate) and
3.1 Definitions—Terms used in this standard are defined in
polymeric (methylene phenylisocyanate).
accordance with Terminology D883, unless otherwise speci-
1.2 The values stated in SI units are to be regarded as
fied. For terms relating to precision and bias and associated
standard. No other units of measurement are included in this
issues,thetermsusedinthisstandardaredefinedinaccordance
standard.
with Terminology E456.
1.3 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 amine equivalent—the weight of sample that will
responsibility of the user of this standard to establish appro-
combine with 1.0-g equivalent weight of dibutylamine.
priate safety, health, and environmental practices and deter-
3.2.2 assay—the percent by weight of toluene diisocyanate
mine the applicability of regulatory limitations prior to use.
present in the sample.
NOTE 1—Method C of this test method is equivalent to Method B of
3.2.3 isocyanate (NCO) content—the percent by weight of
ISO14896.
NCO groups present in the sample.
1.4 This international standard was developed in accor-
dance with internationally recognized principles on standard-
4. Summary of Test Methods
ization established in the Decision on Principles for the
4.1 In all three test methods, the isocyanate sample is
Development of International Standards, Guides and Recom-
reacted with an excess amount of dibutylamine to form the
1 2
These test methods are under the jurisdiction of ASTM Committee D20 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Plastics and are the direct responsibility of Subcommittee D20.22 on Cellular contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Materials - Plastics and Elastomers. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved Aug. 1, 2019. Published August 2019. Originally the ASTM website.
ɛ1
3
approved in 1991. Last previous edition approved in 2014 as D5155-14 . DOI: The last approved version of this historical standard is referenced on
10.1520/D5155-19. www.astm.org.
*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 ----------------------
D5155 − 19
corresponding urea. The NCO cont
...
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: D5155 − 14 D5155 − 19
Standard Test Methods for
Polyurethane Raw Materials: Determination of the
1
Isocyanate Content of Aromatic Isocyanates
This standard is issued under the fixed designation D5155; 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
ε NOTE—Editorially corrected Eq 2 in January 2016.
1. Scope*
1.1 These test methods are used to measure the isocyanate content of aromatic isocyanates used as polyurethane raw materials.
1.1.1 Test Method A—Unheated toluene-dibutylamine determines the toluene diisocyanate content, the amine equivalent and the
isocyanate content of refined toluene-2,4-diisocyanate and toluene-2,6-diisocyanate, or mixtures of the two. Other isomers, if
present, will be included in the determination. This test method is also applicable to other isocyanates of suitable reactivity and
solubility.
1.1.2 Test Method B—Heated toluene-dibutylamine determines the amine equivalent and the isocyanate content of crude or
modified isocyanates derived from toluene diisocyanate, methylene di-(4-phenylisocyanate) and polymeric (methylene phenyli-
socyanate).
1.1.3 Test Method C—Unheated trichlorobenzene-toluene-dibutylamine determines the amine equivalent and the isocyanate
content of crude or modified isocyanates derived from toluene diisocyanate, methylene-di-(4-phenylisocyanate) and polymeric
(methylene phenylisocyanate).
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
NOTE 1—Method C of this test method is equivalent to Method B of ISO 14896.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
E180 Practice for Determining the Precision of ASTM Methods for Analysis and Testing of Industrial and Specialty Chemicals
3
(Withdrawn 2009)
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2935 Practice for Conducting Equivalence Testing in Laboratory Applications
2.2 ISO Standard:
ISO 14896 Polyurethane Raw Materials-Determination of Isocyanate Content
1
These test methods are under the jurisdiction of ASTM Committee D20 on Plastics and are the direct responsibility of Subcommittee D20.22 on Cellular Materials -
Plastics and Elastomers.
Current edition approved Nov. 1, 2014Aug. 1, 2019. Published November 2014August 2019. Originally approved in 1991. Last previous edition approved in 20102014
ɛ1
as D5155 - 10.D5155 - 14 . DOI: 10.1520/D5155-14.10.1520/D5155-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
The last approved version of this historical standard is referenced on www.astm.org.
*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 ----------------------
D5155 − 19
3. Terminology
3.1 Definitions—For definitions of terms that appear in this test method, refer to Terms used in this standard are defined in
accordance with Terminology D883, unless otherwise specified. For terms relating to precision and bias and associated issues, the
terms used in this standard are defined in accordance with Terminology E456.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 amine equivalent—the weight of sample that will combine with 1.0-g equivalent weight of dibutylamine.
3.2.2
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.