ASTM D4877-14
(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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1: This standard is equivalent to ISO 6271-1:2004.
General Information
Relations
Buy Standard
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4877 − 14
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* 3. Terminology
1.1 This test method measures the color of clear liquids. It 3.1 For definitions of terms used in this test method see
is applicable only to materials whose color-producing bodies Terminology D883.
have light-absorption characteristics similar to those of the
2
4. Summary of Test Method
platinum cobalt color standards used. (See Test Method
D1209 and Note 1.) Suitable isocyanates include toluene
4.1 The color of the material to be tested is compared to a
diisocyanate, and pure or modified monomeric methylene
series of platinum cobalt color standards, designated by mg of
di(phenylisocyanate).
Pt/mLofstandardsolution.Theresultsarereportedasthecolor
standard, which best matches the sample (Note 2).
1.2 The values stated in SI units are to be regarded as
standard.
NOTE 2—Test methods for measuring the platinum-cobalt color of
liquids instrumentally are available—for example, Test Method D5386.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
5. Significance and Use
responsibility of the user of this standard to establish appro-
5.1 This test method can be used for research or for quality
priate safety and health practices and determine the applica-
control to characterize isocyanates used in polyurethane prod-
bility of regulatory limitations prior to use.
ucts.
NOTE 1—This standard is equivalent to ISO 6271-1:2004.
5.2 For toluene diisocyanate, results from this test method
can relate to reactivity or performance in polyurethane sys-
2. Referenced Documents
tems.
3
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
6. Apparatus
D1193 Specification for Reagent Water
6.1 Nessler Tubes, matched, 100-mL tall-form.
D1209 Test Method for Color of Clear Liquids (Platinum-
Cobalt Scale)
7. Reagents and Materials
D5386 Test Method for Color of Liquids Using Tristimulus
7.1 Purity of Reagents—Reagent grade chemicals shall be
Colorimetry
used in all tests. Unless otherwise indicated, it is intended that
2.2 ISO Standards:
all reagents conform to the specifications of the Committee on
ISO 6271-1:2004 Clear liquids—Estimation of colour by
Analytical Reagents of the American Chemical Society where
4
the platinum-cobalt scale—Part 1: Visual method
5
such specifications are available. Other grades can be used,
provided it is first ascertained that the reagent is of sufficiently
high purity to permit its use without lessening the accuracy of
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
the determination.
and is the direct responsibility of Subcommittee D20.22 on Cellular Materials -
Plastics and Elastomers.
7.2 Purity of Water—Unless otherwise indicated, references
Current edition approved Aug. 1, 2014. Published September 2014. Originally
to water shall be understood to mean reagent water as defined
approved in 1988. Last previous edition approved in 2010 as D4877 - 10. DOI:
by Type IV or better of Specification D1193.
10.1520/D4877-14.
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 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Reagent Chemicals, American Chemical Society Specifications, American
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Chemical Society, Washington, DC. For suggestions on the testing of reagents not
Standards volume information, refer to the standard’s Document Summary page on listed by the American Chemical Society, see Analar Standards for Laboratory
the ASTM website. Chemicals, BDH Ltd., Poole, Dorset, U.K., and the United States Pharmacopeia
4
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., and National Formulary, U.S. Pharmacopeial Convention, Inc. (USPC), Rockville,
4th Floor, New York, NY 10036, http://www.ansi.org. MD.
*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 − 14
TABLE 1 Color Standards
7.3 Cobaltous Chloride Hexahydrate (CoCl ·6H O).
2 2
Color Standard Number Number 500 Standard, mL Water, mL
7.4 Concentrated Hydrochloric Acid (sp. gr. 1.19).
1 0.2 99.8
...
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 − 10 D4877 − 14
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 and health practices and determine the applicability of regulatory
limitations prior to use.
NOTE 1—This standard is equivalent to ISO 6271-1:2004.
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)
D5386 Test Method for Color of Liquids Using Tristimulus Colorimetry
2.2 ISO Standards:
ISO 6271-1:2004 Clear Liquids—Estimationliquids—Estimation of Colorcolour by the Platinum Cobalt Scaleplatinum-cobalt
4
scale—Part 1: Visual method
3. Terminology
3.1 For definitions of terms used in this test method see Terminology D883.
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—Color of liquids also can be measured by visible spectroscopy and the results converted to any of several color scales. These results can be
converted to the APHA scale by appropriate manipulations, as for example in Test methods for measuring the platinum-cobalt color of liquids
instrumentally are available—for example, Test Method D5386.
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.
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 Jan. 1, 2010Aug. 1, 2014. Published February 2010September 2014. Originally approved in 1988. Last previous edition approved in 20042010
as D4877 - 04.D4877 - 10. DOI: 10.1520/D4877-10.10.1520/D4877-14.
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 − 14
6. Apparatus
6.1 Nessler Tubes, matched, 100-mL tall-form.
7. Reagents and Materials
7.1 Purity of Reagents—Reagent grade chemicals shall be used in all tests. Unless otherwise indicated, it is intended that all
reagents conform to the specifications of the Committee on Analytical Reagents of the American Chemical Society where such
5
specifications are available. Other grades can be used, provided it is first ascertained that the reagent is of sufficiently high purity
to permit its use without lessening the accuracy of the determination.
7.2 Purity of Water—Unless otherwise indicated, references to water shall be understood to mean reagent water as defined by
Type IV or be
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.