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ASTM D4242-07

(Test Method)

Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders

Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders

SIGNIFICANCE AND USE
This test method is useful for selecting coating powders of similar characteristics of melt flow under minimal shear. It is not recommended as an absolute measurement, but rather as a comparative measurement of samples on the same panel measured at the same time.
SCOPE
1.1 This test method specifies a method for determining the flow characteristics of a fused thermosetting coating powder down a plane inclined at a set angle to the horizontal. The test gives an indication of the degree of melt flow that may occur during the curing of the coating powder. This characteristic contributes to the coherence of the coating, to its surface appearance and to the degree of coverage over sharp edges (see Test Method D 2967), however, it should not be used as the sole factor for judgment. The test acts as a useful method for checking for batch to batch variation in the behavior of a given coating powder. Correlation between the results from coating powders of differing composition is not to be expected. This method is unlikely to yield meaningful results with coating powders which have gel times of less than one minute at the test temperature (see Test Method D 4217). Oven drafts, angle of inclination and pellet variations significantly affect results making inter-lab reproducibility somewhat difficult to correlate.
1.2 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 to determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-May-2007
ICS
83.080.10 - Thermosetting materials
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.51 - Powder Coatings
Current Stage
Ref Project

Relations

Replaces
ASTM D4242-02 - Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders
Effective Date
01-Jun-2007
Replaced By
ASTM D4242-07(2013) - Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders
Effective Date
01-Jun-2013
Referred By
ASTM D3451-06(2017) - Standard Guide for Testing Coating Powders and Powder Coatings
Effective Date
01-Jun-2007

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ASTM D4242-07 - Standard Test Method for Inclined Plate Flow for Thermosetting Coating PowdersASTM D4242-07 - Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders
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ASTM D4242-07 - Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders
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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: D4242 − 07
StandardTest Method for
1
Inclined Plate Flow for Thermosetting Coating Powders
This standard is issued under the fixed designation D4242; 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* D4217 Test Method for Gel Time of Thermosetting Coating
Powder
1.1 This test method specifies a method for determining the
D5965 Test Methods for Specific Gravity of Coating Pow-
flow characteristics of a fused thermosetting coating powder
ders
down a plane inclined at a set angle to the horizontal. The test
2.2 Other Documents:
gives an indication of the degree of melt flow that may occur
ISO 8130-2 Coating powders—Part 2: Determination of
during the curing of the coating powder. This characteristic
3
density by gas comparison pyknometer
contributes to the coherence of the coating, to its surface
ISO 8130-3 Coating powders—Part 3: Determination of
appearanceandtothedegreeofcoverageoversharpedges(see
3
density by liquid displacement pyknometer
TestMethodD2967),however,itshouldnotbeusedasthesole
ISO 8130–11:1997 Coating powders—Part 11: Inclined-
factor for judgment. The test acts as a useful method for
3
plane flow test
checking for batch to batch variation in the behavior of a given
coating powder. Correlation between the results from coating
3. Terminology
powders of differing composition is not to be expected. This
3.1 Definitions:
method is unlikely to yield meaningful results with coating
3.1.1 coating powder, n—finely divided particles of resin,
powders which have gel times of less than one minute at the
either thermoplastic or thermosetting, generally incorporating
test temperature (see Test Method D4217). Oven drafts, angle
pigments, fillers, and additives and remaining finely divided
of inclination and pellet variations significantly affect results
during storage under suitable conditions, which after fusing
making inter-lab reproducibility somewhat difficult to corre-
and possibly curing, give a continuous film.
late.
3.1.2 powder coating, n—coatings which are protective or
1.2 The values stated in SI units are to be regarded as the
decorative, or both, formed by the application of a coating
standard. The values given in parentheses are for information
powder to a substrate and fused in a continuous film by the
only.
application of heat or radiant energy.
1.3 This standard does not purport to address all of the
3.1.3 gel time of a coating powder, n—the interval required
safety concerns, if any, associated with its use. It is the
at a given temperature for a coating powder to be transformed
responsibility of the user of this standard to establish appro-
from a dry solid to a gel-like state.
priate safety and health practices and to determine the
3.1.4 cure time of a coating powder, n—thetimerequiredfor
applicability of regulatory limitations prior to use.
a thermosetting coating powder to sufficiently chemically
2. Referenced Documents
crosslinkatagiventemperaturetoprovidetherequiredcoating
2
properties.
2.1 ASTM Standards:
D792 Test Methods for Density and Specific Gravity (Rela-
3.1.5 thermosetting, adj—describing a material that, when
tive Density) of Plastics by Displacement
heated per a minimum recommended cure condition, under-
D2967 Test Method for Corner Coverage of Powder Coat-
goes a chemical reaction and a permanent change to a more
ings
durable state capable of specific properties as designed for
substrate protection or decoration, or both.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
4. Summary of Test Method
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.51 on Powder Coatings.
4.1 The thermosetting coating powder is pressed into a
Current edition approved June 1, 2007. Published June 2007. Originally
pellet of standard size which is allowed to melt and flow down
approved in 1983. Last previous edition approved in 2002 as D4242 – 02. DOI:
10.1520/D4242-07. a heated inclined plate. The extent of flow is measured.
2
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
3
Standards volume information, refer to the standard’s Document Summary page on Available from International Organization for Standardization (ISO), 1 rue de
the ASTM website. Varembé, Case postale 56, CH-1211, Geneva 20, Switzerland, http://www.iso.ch.
*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

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