Standard Test Methods for Chemical and Gravimetric Analysis of White and Yellow Thermoplastic Traffic Marking Containing Lead Chromate and Titanium Dioxide

SCOPE
1.1 These test methods cover procedures for the chemical and gravimetric analysis of white and yellow thermoplastic traffic marking containing lead chromate and titanium dioxide pigment.
1.2 The analytical procedures appear in the following order:
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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
Test for 1.50 glass spheres only.
Note 2
This modified analysis of chrome yellow and chrome orange pigments must be used because the heat resistant chrome yellows in the thermoplastic cannot be analyzed by Test Methods D 126.

General Information

Status
Historical
Publication Date
31-Oct-2007
Current Stage
Ref Project

Relations

Buy Standard

Standard
ASTM D4797-88(2007) - Standard Test Methods for Chemical and Gravimetric Analysis of White and Yellow Thermoplastic Traffic Marking Containing Lead Chromate and Titanium Dioxide
English language
4 pages
sale 15% off
Preview
sale 15% off
Preview

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D4797 − 88(Reapproved 2007)
Standard Test Methods for
Chemical and Gravimetric Analysis of White and Yellow
Thermoplastic Traffic Marking Containing Lead Chromate
and Titanium Dioxide
This standard is issued under the fixed designation D4797; 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 D1394 Test Methods for Chemical Analysis of White Tita-
nium Pigments
1.1 These test methods cover procedures for the chemical
F412 Terminology Relating to Plastic Piping Systems
and gravimetric analysis of white and yellow thermoplastic
traffic marking containing lead chromate and titanium dioxide
3. Terminology
pigment.
3.1 Definitions—Definitions are in accordance with Termi-
1.2 The analytical procedures appear in the following order:
nology D883 and F412, unless otherwise indicated.
Sections
3.2 Definitions of Terms Specific to This Standard:
Percent Binder 10
3.2.1 ash, n—the inorganic components of thermoplastic
Percent Glass Beads (Note 1) 11
Percent Titanium Dioxide 12 traffic marking including the pigment, glass spheres, and filler.
Percent Lead Chromate and Analysis of Chrome Yellow and 13
3.2.2 binder, n—the organic components of thermoplastic
Chrome Orange Pigments (Note 2)
traffic marking that bind the pigments, glass spheres, and filler
1.3 The values stated in SI units are to be regarded as the
together as a unit.
standard. The values given in parentheses are for information
3.2.3 filler, n—the inorganic components of thermoplastic
only.
traffic marking not including the pigments or glass spheres.
1.4 This standard does not purport to address all of the
3.2.4 pigment, n—titanium dioxide and lead chromate colo-
safety concerns, if any, associated with its use. It is the
rants.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
3.2.5 thermoplastic, n—See thermoplastic traffıc marking.
bility of regulatory limitations prior to use.
3.2.6 thermoplastic traffıc marking, n—a highly filled
100 % total solids highway marking system that when heated
NOTE 1—Test for 1.50 glass spheres only.
NOTE 2—This modified analysis of chrome yellow and chrome orange toamoltenstatecanbeextrudedorsprayedontoaroadsurface
pigments must be used because the heat resistant chrome yellows in the
and when cooled forms a solid durable delineator.
thermoplastic cannot be analyzed by Test Methods D126.
4. Summary of Test Method
2. Referenced Documents
4.1 The thermoplastic material is prepared for the described
2.1 ASTM Standards:
test methods by melting a sample to its application temperature
D126 Test Methods for Analysis of Yellow, Orange, and
under continuous agitation. The specimen is then poured into
Green Pigments Containing Lead Chromate and Chro-
round patties on a clean tin plate or baking pan. The patties are
mium Oxide Green
then broken into pieces for ignition in a muffle furnace. The
D883 Terminology Relating to Plastics
percent binder is calculated from the ashed specimen and the
D1193 Specification for Reagent Water
various tests for glass spheres, titanium dioxide, and lead
chromate pigment are performed on the ashed residue. The
These test methods are under the jurisdiction of ASTM Committee D01 on tests for pigment type or glass spheres may be run on the same
Paint and Related Coatings, Materials, and Applications and are the direct
ashed specimen. Specimen selection and preparation are the
responsibility of Subcommittee D01.44 on Traffic Coatings.
same for each sample tested.
Current edition approved Nov. 1, 2007. Published November 2007. Originally
approved in 1988. Last previous edition approved in 2004 as D4797 – 88 (2004).
5. Significance and Use
DOI: 10.1520/D4797-88R07.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 The function of these test methods is to define the
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
percent of binder, glass, titanium dioxide, and lead chromate
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. present in the composition of the thermoplastic traffic marking
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D4797 − 88 (2007)
as defined by the applicable specification for the manufacture 8. Sampling
of a specific thermoplastic traffic marking.
8.1 Samples may be obtained by an appropriate quartering
or riffle sampling method where deemed necessary considering
6. Apparatus
the physical form of the material.
6.1 Balance, analytical, accurate to 0.1 mg.
9. Preparation of Specimens
6.2 Buret, 10 mL, 0.1-mL divisions.
9.1 Melt a sample of approximately 1000 g of thermoplastic
6.3 Buret, 50 mL, 0.1-mL divisions.
traffic marking to 210 to 218°C under continuous agitation on
6.4 Crucibles, 30 mL, porcelain. a hot plate set at 537°C or stir every 15 min in an oven set at
260°C.
6.5 Desiccator.
9.2 Flow the sample out on a smooth clean surface and
6.6 Erlenmeyer flask, 500 mL.
allowittocooltoroomtemperature.Patties3mm( ⁄8in.)thick
6.7 Furnace (Muffle), capable of maintaining 1100°C.
willfacilitatebreakingupspecimensforthedescribedanalysis.
6.8 Hot Plate, capable of maintaining 537°C. 9.3 Break the specimen into small pieces and weigh 10 g to
the nearest 0.1 mg into a 30-mL weighed crucible.
6.9 Jones Reductor.
9.4 Cover the crucible and place into a muffle furnace
6.10 Mortar and Pestle, glazed ceramic or other impervious
preheated to 540°C and ash for1hor until no carbonaceous
type.
materials remain.
6.11 Oven, capable of maintaining 260°C.
9.5 Remove the crucible with the ashed remains of the
6.12 Sieve, 3 in., 45-µm (No. 325) (metal).
specimen and place into a desiccator and cool to room
temperature.
7. Reagents
10. Percent Binder
7.1 Purity of Reagents—Reagent grade chemicals shall be
10.1 Procedure:
used in all tests. Unless otherwise indicated, it is intended that
all reagents shall conform to the specifications of the Commit- 10.1.1 Weigh the crucible and ash (See Section 9)tothe
nearest 0.1 mg and calculate the percent of organic binder D as
tee onAnalytical Reagents of theAmerican Chemical Society,
where such specifications are available. Other grades may be follows:
used, provided it is first ascertained that the reagent is of
D 5[1 2 S/W ] 3100 (1)
~ !
sufficiently high purity to permit its use without lessening the
accuracy of the determination.
where:
7.2 Purity of Water—Unless otherwise indicated, references
S = ashed weight of thermoplastic specimen, g, and
to water shall be understood to mean reagent water as defined
W = weight of thermoplastic specimen, g.
by Type IV of Specification D1193.
11. Percent Glass Beads
7.3 Alcohol—Ethyl alcohol 95 %.
11.1 Interferences—Acid-insoluble fillers will affect the
7.4 Potassium Chloride (KCl).
glass-sphere analysis and must be removed by some physical
7.5 Potassium Hydroxide Solution—Dissolve 50 g of potas-
separation method or accounted for quantitatively, or both.
sium hydroxide (KOH) in 100 mL of freshly distilled water.
11.2 Procedure:
7.6 Potassium Iodide (KI).
11.2.1 Weigh the crucible and ash (see Section
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.