ASTM D6493-05

Standard Test Methods for Softening Point of Hydrocarbon Resins by Automated Ring and Ball Apparatus

SIGNIFICANCE AND USE
For hydrocarbon resins, softening does not take place at a definite temperature. As the temperature rises, these materials gradually change from brittle solids or very viscous liquids to less viscous liquids. For this reason, determination of the softening point must be made by a fixed, arbitrary, and closely defined method if the results obtained are to be comparable.
SCOPE
1.1 These test methods are intended for determining the softening point of hydrocarbon resins and similar materials by means of an automated ring-and-ball apparatus. Portions are similar in technical content to the automated-apparatus versions of Test Methods D 36, E 28, and ISO 4625.
1.1.1 The ring-and-ball softening point of a hydrocarbon resin may also be determined with lower precision using the manual ring-and-ball softening point procedure in Test Methods E 28.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 This standard method 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: Historical
• Publication Date: 30-Jun-2005
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.34 - Pine Chemicals and Hydrocarbon Resins

Relations

• Replaces: ASTM D6493-99 - Standard Test Methods for Softening Point of Hydrocarbon Resins by Automated Ring and Ball Apparatus
• Effective Date: 01-Jul-2005
• Replaced By: ASTM D6493-05(2010) - Standard Test Methods for Softening Point of Hydrocarbon Resins by Automated Ring and Ball Apparatus
• Effective Date: 15-Jul-2010
• Referred By: ASTM D7188-05(2019) - Standard Terminology for Printing Inks, Materials, and Processes
• Effective Date: 01-Jul-2005

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D6493–05
Standard Test Methods for
Softening Point of Hydrocarbon Resins by Automated Ring-
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and-Ball Apparatus
This standard is issued under the fixed designation D6493; 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* ISO 4625 Binders for paints and varnishes—Determination
3
of softening point–Ring-and-ball method
1.1 These test methods are intended for determining the
softening point of hydrocarbon resins and similar materials by
3. Summary of Test Method
means of an automated ring-and-ball apparatus. Portions are
3.1 These test methods are for the determination of a
similar in technical content to the automated-apparatus ver-
hydrocarbon resin’s softening point—the temperature at which
sions of Test Methods D36, E28, and ISO 4625.
a disk of the resin held within a horizontal ring is forced
1.1.1 The ring-and-ball softening point of a hydrocarbon
downwardadistanceof25.4mm(1.00in.)undertheweightof
resin may also be determined with lower precision using the
a standard steel ball, as the specimen is heated at 5°C/min. in
manual ring-and-ball softening point procedure in Test Meth-
a specified liquid bath.
ods E28.
1.2 The values stated in SI units are to be regarded as the
4. Significance and Use
standard. The values given in parentheses are for information
4.1 For hydrocarbon resins, softening does not take place at
only.
adefinitetemperature.Asthetemperaturerises,thesematerials
1.3 This standard method does not purport to address all of
gradually change from brittle solids or very viscous liquids to
the safety concerns, if any, associated with its use. It is the
less viscous liquids. For this reason, determination of the
responsibility of the user of this standard to establish appro-
softening point must be made by a fixed, arbitrary, and closely
priate safety and health practices and determine the applica-
defined method if the results obtained are to be comparable.
bility of regulatory limitations prior to use.
5. Sample Preparation
2. Referenced Documents
2 5.1 Preparation of Sample by the Pour Method: This
2.1 ASTM Standards:
procedure is suitable for resins that can be heated and poured
D36 Test Method for Softening Point of Bitumen (Ring-
without adverse effect on the softening point.
and-Ball Apparatus)
5.1.1 Select a sample representative of the material to be
E1 Specification for ASTM Liquid-in-Glass Thermometers
tested.The sample should consist of flakes, pastilles, or broken
E28 Test Methods for Softening Point of Resins Derived
lumps. Avoid inclusion of finely divided material or dust.
from Naval Stores by Ring-and-Ball Apparatus
5.1.2 Select a quantity of resin having a volume at least
E177 Practice for Use of the Terms Precision and Bias in
twice that necessary to fill the desired number of rings, and
ASTM Test Methods
melt it in a clean container, using an oven, hot plate, sand bath
E691 Practice for Conducting an Interlaboratory Study to
or oil bath to prevent local overheating. If necessary, stir
Determine the Precision of a Test Method
slowly, taking care to avoid incorporating air bubbles in the
2.2 ISO Standard:
sample. Melt the sample completely, but do not heat it above a
temperature necessary to pour the material readily. The time
1
from the beginning of heating to pouring should not exceed 15
These test methods are under the jurisdiction of ASTM Committee D01 on
Paint and Related Coatings, Materials, and Applications and are the direct
min.
responsibility of Subcommittee D01.34 on Pine Chemicals and Hydrocarbon
5.1.3 Formaterialsthattendtocrackorshrinkintheringon
Resins.
cooling, immediately before filling the ring, preheat the ring to
Current edition approved July 1, 2005. Published August 2005. Originally
approximately the temperature at which the material is to be
approved in 1999. Last previous edition approved in 1999 as D6493 – 99. DOI:
10.1520/D6493-05.
poured. The ring, while being filled, should rest bottom down
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
the ASTM website. 4th Floor, New York, NY 10036, http://www.ansi.org.
*A Summary of Changes section appears at the end of this standard.
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