ASTM D4877-19
(Test Method)Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
Standard Test Method for Polyurethane Raw Materials: Determination of APHA Color in Isocyanates
SIGNIFICANCE AND USE
5.1 This test method can be used for research or for quality control to characterize isocyanates used in polyurethane products.
5.2 For toluene diisocyanate, results from this test method can relate to reactivity or performance in polyurethane systems.
SCOPE
1.1 This test method measures the color of clear liquids. It is applicable only to materials whose color-producing bodies have light-absorption characteristics similar to those of the platinum cobalt color standards used.2 (See Test Method D1209 and Note 1.) Suitable isocyanates include toluene diisocyanate, and pure or modified monomeric methylene di(phenylisocyanate).
1.2 The values stated in SI units are to be regarded as 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: This standard and ISO 6271-1 address the same subject matter, but differ in technical content.
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: D4877 − 19
Standard Test Method for
Polyurethane Raw Materials: Determination of APHA Color
1
in Isocyanates
This standard is issued under the fixed designation D4877; 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* D4890 Test Methods for Polyurethane Raw Materials: De-
termination of Gardner and APHA Color of Polyols
1.1 This test method measures the color of clear liquids. It
D5386 Test Method for Color of Liquids Using Tristimulus
is applicable only to materials whose color-producing bodies
Colorimetry
have light-absorption characteristics similar to those of the
2 E456 Terminology Relating to Quality and Statistics
platinum cobalt color standards used. (See Test Method
E2935 Practice for Conducting Equivalence Testing in
D1209 and Note 1.) Suitable isocyanates include toluene
Laboratory Applications
diisocyanate, and pure or modified monomeric methylene
2.2 ISO Standards:
di(phenylisocyanate).
ISO 6271-1 Clear liquids—Estimation of colour by the
4
1.2 The values stated in SI units are to be regarded as
platinum-cobalt scale—Part 1: Visual method
standard.
3. Terminology
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1 Terms used in this standard are defined in accordance
with Terminology D883, unless otherwise specified. For terms
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter- relating to precision and bias and associated issues, the terms
used in this standard are defined in accordance with Terminol-
mine the applicability of regulatory limitations prior to use.
ogy E456.
NOTE 1—This standard and ISO 6271-1 address the same subject
matter, but differ in technical content.
4. Summary of Test Method
1.4 This international standard was developed in accor-
4.1 The color of the material to be tested is compared to a
dance with internationally recognized principles on standard-
series of platinum cobalt color standards, designated by mg of
ization established in the Decision on Principles for the
Pt/mLofstandardsolution.Theresultsarereportedasthecolor
Development of International Standards, Guides and Recom-
standard, which best matches the sample (Note 2).
mendations issued by the World Trade Organization Technical
NOTE 2—Test methods for measuring the platinum-cobalt color of
Barriers to Trade (TBT) Committee.
liquids instrumentally are available—for example, Test Method D5386.
2. Referenced Documents
5. Significance and Use
3
2.1 ASTM Standards:
5.1 This test method can be used for research or for quality
D883 Terminology Relating to Plastics
control to characterize isocyanates used in polyurethane prod-
D1193 Specification for Reagent Water
ucts.
D1209 Test Method for Color of Clear Liquids (Platinum-
5.2 For toluene diisocyanate, results from this test method
Cobalt Scale)
can relate to reactivity or performance in polyurethane sys-
tems.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
6. Apparatus
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials -
Plastics and Elastomers.
6.1 Nessler Tubes, matched, 100-mL tall-form.
Current edition approved Aug. 1, 2019. Published August 2019. Originally
approved in 1988. Last previous edition approved in 2014 as D4877 - 14. DOI:
7. Reagents and Materials
10.1520/D4877-19.
2
See Standard Methods for the Examination of Water, Sewage, and Industrial
7.1 Purity of Reagents—Reagent grade chemicals shall be
Wastes, AM. Public Health Assn., 1015 15th St. NW Washington, DC 20005.
used in all tests. Unless otherwise indicated, it is intended that
3
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
4
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.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 ----------------------
D4877 − 19
TABLE 1 Color Standards
all reagents conform to the specifications of the Committee on
Analytical Reagents of the American Chemica
...
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.
Designation: D4877 − 14 D4877 − 19
Standard Test Method for
Polyurethane Raw Materials: Determination of APHA Color
1
in Isocyanates
This standard is issued under the fixed designation D4877; 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*
1.1 This test method measures the color of clear liquids. It is applicable only to materials whose color-producing bodies have
2
light-absorption characteristics similar to those of the platinum cobalt color standards used. (See Test Method D1209 and Note
1.) Suitable isocyanates include toluene diisocyanate, and pure or modified monomeric methylene di(phenylisocyanate).
1.2 The values stated in SI units are to be regarded as 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—This standard is equivalent to ISO 6271-1:2004.and ISO 6271-1 address the same subject matter, but differ in technical content.
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
3
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1193 Specification for Reagent Water
D1209 Test Method for Color of Clear Liquids (Platinum-Cobalt Scale)
D4890 Test Methods for Polyurethane Raw Materials: Determination of Gardner and APHA Color of Polyols
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
E456 Terminology Relating to Quality and Statistics
E2935 Practice for Conducting Equivalence Testing in Laboratory Applications
2.2 ISO Standards:
4
ISO 6271-1:2004 ISO 6271-1 Clear liquids—Estimation of colour by the platinum-cobalt scale—Part 1: Visual method
3. Terminology
3.1 For definitions of terms Terms used in this test method see 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.
4. Summary of Test Method
4.1 The color of the material to be tested is compared to a series of platinum cobalt color standards, designated by mg of Pt/mL
of standard solution. The results are reported as the color standard, which best matches the sample (Note 2).
NOTE 2—Test methods for measuring the platinum-cobalt color of liquids instrumentally are available—for example, Test Method D5386.
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.22 on Cellular Materials - Plastics
and Elastomers.
Current edition approved Aug. 1, 2014Aug. 1, 2019. Published September 2014August 2019. Originally approved in 1988. Last previous edition approved in 20102014
as D4877 - 10.D4877 - 14. DOI: 10.1520/D4877-14.10.1520/D4877-19.
2
See Standard Methods for the Examination of Water, Sewage, and Industrial Wastes, AM. Public Health Assn., 1015 15th St. NW Washington, DC 20005.
3
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.
4
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.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 ----------------------
D4877 − 19
5. Significance and Use
5.1 This test method can be used for research or for quality control to characterize isocyanates used in polyurethane products.
5.2 For toluene diisocyanate, results from this test method can relate to reactivity or performance in polyurethane systems.
6. Apparatus
6.1 Nessler Tubes, matched, 100-mL t
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.