ASTM D2743-68(2004)
(Practice)Standard Practices for Uniformity of Traffic Paint Vehicle Solids by Spectroscopy and Gas Chromatography
Standard Practices for Uniformity of Traffic Paint Vehicle Solids by Spectroscopy and Gas Chromatography
SCOPE
1.1 These practices provide general information on the instrumental techniques available for detecting adulteration or nonuniformity of the chemical nature of the vehicle solids in purchased lots of traffic paints by means of the individual or combined use of infrared and ultraviolet spectroscopy and gas chromatography. The procedures given are applicable when traffic paint is selected and purchased on the basis of pre-qualification laboratory or road performance tests, or both, and a reference sample of the original paint so evaluated and selected is retained and compared with test samples representative of subsequent purchased and delivered lots of such paint and which are required to be the same as the original reference sample.
1.2 Although not specifically provided for in these practices, the methods given may also be applied, with appropriate modification, to evaluating the acceptability of traffic paints that have been purchased on the basis of composition specifications. In such cases, application is limited to the vehicle solids as before, as well as the availability of a suitable standard or range of standards representative of the vehicle solids that are acceptable and with which samples of subsequent delivered lots will be compared.
1.3 The techniques provided are wholly adequate for detecting gross adulteration of the vehicle solids where completely different drying oils, resins, or polymers, or combinations of these have been substituted for those originally contained in the reference sample. In cases of lesser adulteration or modification, these methods have been found adequate for detecting vehicle solids, adulterations, or modifications as low as 5 weight % of the vehicle solids.
1.4 These techniques have been developed on the basis of cooperative work with alkyd, chlorinated rubber-alkyd, and poly(vinyl toluene) type paints involving the detection of nonuniformity when such extraneous materials as rosin, fish oil, hydrocarbon resin, and chlorinated paraffin have been added. The procedures given may be, but are not necessarily completely applicable to all other types of vehicle solids or extraneous additions, or both.
1.5 The methods provided appear in the following order:SectionMethod A-Infrared Spectral Analysis of Total Vehicle SolidsMethod B-Infrared Spectral Analysis of Unsaponifiable Matter from Vehicle SolidsMethod C-Gas Chromatographic Analysis of Oils and Oil Acids Separated from Vehicle SolidsMethod D-Ultraviolet Spectral Analysis of Total Vehicle Solids19, 20, and 21
1.6 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.
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Designation:D2743–68(Reapproved2004)
Standard Practices for
Uniformity of Traffic Paint Vehicle Solids by Spectroscopy
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and Gas Chromatography
This standard is issued under the fixed designation D2743; 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 nonuniformity when such extraneous materials as rosin, fish
oil, hydrocarbon resin, and chlorinated paraffin have been
1.1 These practices provide general information on the
added. The procedures given may be, but are not necessarily
instrumental techniques available for detecting adulteration or
completely applicable to all other types of vehicle solids or
nonuniformity of the chemical nature of the vehicle solids in
extraneous additions, or both.
purchased lots of traffic paints by means of the individual or
1.5 The methods provided appear in the following order:
combined use of infrared and ultraviolet spectroscopy and gas
Section
chromatography. The procedures given are applicable when
Method A—Infrared Spectral Analysis of Total Vehicle Solids 10-12
traffic paint is selected and purchased on the basis of pre-
Method B—Infrared Spectral Analysis of Unsaponifiable Matter
qualification laboratory or road performance tests, or both, and from Vehicle Solids 13-15
Method C—Gas Chromatographic Analysis of Oils and Oil Acids
a reference sample of the original paint so evaluated and
Separated from Vehicle Solids 16-18
selected is retained and compared with test samples represen-
Method D—Ultraviolet Spectral Analysis of Total Vehicle Solids
tative of subsequent purchased and delivered lots of such paint
19, 20, and
21
and which are required to be the same as the original reference
sample.
1.6 This standard does not purport to address all of the
1.2 Although not specifically provided for in these prac-
safety concerns, if any, associated with its use. It is the
tices, the methods given may also be applied, with appropriate
responsibility of the user of this standard to establish appro-
modification, to evaluating the acceptability of traffic paints
priate safety and health practices and determine the applica-
that have been purchased on the basis of composition specifi-
bility of regulatory limitations prior to use.
cations. In such cases, application is limited to the vehicle
2. Referenced Documents
solids as before, as well as the availability of a suitable
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standard or range of standards representative of the vehicle
2.1 ASTM Standards:
solids that are acceptable and with which samples of subse-
D1259 Test Methods for Nonvolatile Content of Resin
quent delivered lots will be compared.
Solutions
1.3 The techniques provided are wholly adequate for detect-
D1397 Test Method for Unsaponifiable Matter in Alkyd
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ing gross adulteration of the vehicle solids where completely
Resins and Resin Solutions
different drying oils, resins, or polymers, or combinations of
D2245 Test Method for Identification of Oils and OilAcids
thesehavebeensubstitutedforthoseoriginallycontainedinthe
in Solvent-Reducible Paints
reference sample. In cases of lesser adulteration or modifica-
D2372 Practice for Separation of Vehicle From Solvent-
tion, these methods have been found adequate for detecting
Reducible Paints
vehicle solids, adulterations, or modifications as low as 5
D2621 Test Method for Infrared Identification of Vehicle
weight % of the vehicle solids.
Solids From Solvent-Reducible Paints
1.4 These techniques have been developed on the basis of
E105 Practice for Probability Sampling Of Materials
cooperative work with alkyd, chlorinated rubber-alkyd, and
E131 Terminology Relating to Molecular Spectroscopy
poly(vinyl toluene) type paints involving the detection of
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These practices are under jurisdiction of ASTM Committee D01 on Paint and For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Related Coatings, Materials, and Applications and are the direct responsibility of contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Subcommittee D01.44 on Traffic Coatings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved June 1, 2004. Published June 2004. Originally the ASTM website.
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approved in 1968. Last previous edition approved in 1998 as D2743 – 68 (1998) Withdrawn. The last approved version of this historical standard is referenced
DOI: 10.1520/D2743-68R04. on www.astm.org.
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D2743–68 (2004)
3. Terminology dif
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