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ASTM D2621-87(2016)

(Test Method)

Standard Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible Paints

Standard Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible Paints

SIGNIFICANCE AND USE
5.1 The ability to qualitatively identify paint vehicles is useful for characterizing unknown or competitive coatings, for complaint investigations, and for in-process control.
SCOPE
1.1 This test method covers the qualitative characterization or identification of separated paint vehicle solids by infrared spectroscopy within the limitations of infrared spectroscopy.  
1.2 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.

General Information

Status
Published
Publication Date
30-Nov-2016
ICS
87.060.20 - Binders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.21 - Chemical Analysis of Paints and Paint Materials
Current Stage
Ref Project

Relations

Referred By
ASTM D3168-85(2022) - Standard Practice for Qualitative Identification of Polymers in Emulsion Paints
Effective Date
01-Dec-2016
Referred By
ASTM D7588-11(2018) - Standard Guide for FT-IR Fingerprinting of a Non-Aqueous Liquid Paint as Supplied in the Manufacturer's Container
Effective Date
01-Dec-2016
Referred By
ASTM F940-99(2019)e1 - Standard Practice for Quality Control Receipt Inspection Procedures for Protective Coatings (Paint), Used in Marine Construction and Shipbuilding
Effective Date
01-Dec-2016
Referred By
ASTM D6577-15(2019) - Standard Guide for Testing Industrial Protective Coatings
Effective Date
01-Dec-2016
Referred By
ASTM D5146-10(2019) - Standard Guide to Testing Solvent-Borne Architectural Coatings
Effective Date
01-Dec-2016
Referred By
ASTM D6763-16(2022) - Standard Guide for Testing Exterior Wood Stains and Clear Water Repellents
Effective Date
01-Dec-2016

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ASTM D2621-87(2016) - Standard Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible PaintsASTM D2621-87(2016) - Standard Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible Paints
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ASTM D2621-87(2016) - Standard Test Method for Infrared Identification of Vehicle Solids From Solvent-Reducible Paints
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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: D2621 −87 (Reapproved 2016)
Standard Test Method for
Infrared Identification of Vehicle Solids From Solvent-
1
Reducible Paints
This standard is issued under the fixed designation D2621; 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 5. Significance and Use
1.1 This test method covers the qualitative characterization
5.1 The ability to qualitatively identify paint vehicles is
or identification of separated paint vehicle solids by infrared
useful for characterizing unknown or competitive coatings, for
spectroscopy within the limitations of infrared spectroscopy.
complaint investigations, and for in-process control.
1.2 This standard does not purport to address all of the
6. Apparatus
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6.1 Spectrophotometer—A recording double-beam infrared
priate safety and health practices and determine the applica-
spectrophotometerwithawavelengthrangefromatleast2.5to
bility of regulatory limitations prior to use.
15 µ m and a spectral resolution of at least 0.04 µm over that
range. See Practice E275.
2. Referenced Documents
2
6.2 Demountable Cell Mount, with NaCl window.
2.1 ASTM Standards:
D1467Guide for Testing Fatty Acids Used in Protective
6.3 Vacuum Drying Oven thermostatically controlled to
3
Coatings (Withdrawn 2003)
operate at 60 6 2°C. A water aspirator vacuum source is
D1962TestMethodforSaponificationValueofDryingOils,
satisfactory.
Fatty Acids, and Polymerized Fatty Acids (Withdrawn
3 6.4 Oven, Gravity or Forced Draft, capable of maintaining
2004)
temperature from 105 to 110°C.
D2372Practice for Separation of Vehicle From Solvent-
Reducible Paints
7. Procedure
E131Terminology Relating to Molecular Spectroscopy
E275PracticeforDescribingandMeasuringPerformanceof
7.1 Placethevehicle,separatedfromthepaintinaccordance
Ultraviolet and Visible Spectrophotometers
with Practice D2372, on a NaCl window and spread to form a
uniform film. Make sure that the thickness of the film is such
3. Terminology
that when the infrared spectrum is recorded, the transmittance
3.1 Definitions:
of the strongest band falls between 5 and 15% (Note). Dry the
3.1.1 For definitions of terms and symbols, refer to Termi-
film in an oven at 105 to 110°C for 15 min and cool in a
nology E131.
desiccator.Inspectthefilmvisuallyfordefectssuchasbubbles,
wrinkles, contamination, etc. If defects are present, cast an-
4. Summary of Test Method
other film. If easily oxidizable substances are present such as
4.1 Infraredspectraarepreparedfromdriedfilmsofisolated
tung,oiticica,orlinseedoils,makesurethatthefilmisdriedat
paint vehicles. Vehicle types are identified by comparing the
60 62°Cinavacuumovenfor1h.Ifsolventsoflowvolatility
spectra to a collection of reference infrared spectra.
such as cyclohexanone or isophorone are present, the film may
need to be dried for several hours in a 60°C vacuum oven.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of NOTE 1—Numerous procedures and variations may be used to obtain a
Subcommittee D01.21 on Chemical Analysis of Paints and Paint Materials.
film on which to prepare a suitable spectrum. These include liquid
Current edition approved Dec. 1, 2016. Published December 2016. Originally
mounting between two NaCl plates, transmission through free films, and
approved in 1967. Last previous edition approved in 2011 as D2621–87(2011).
reflectance from highly polished surfaces.
DOI: 10.1520/D2621-87R16.
2
7.2 Immediatelyrecordtheinfraredspectrumfrom2.5to15
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
µm so that a spectral resolution of 0.04 µm is maintained
Standards volume information, refer to the standard’s Document Summary page on
throughout that range (methods for achieving this resolution
the ASTM website.
3
willvaryaccordingtothedirectionsofthemanufacturerofthe
The last approved version of this historical standard is referenced on
www.astm.org. instrument used).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D2621 − 87 (2016)
TABLE 1 Correlation of Absorption Bands in Alkyd Spectra
−1
Wavelength,
...

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