ASTM D6267/D6267M-13(2022)

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: D6267/D6267M − 13 (Reapproved 2022)
Standard Test Method for
Apparent Viscosity of Hydrocarbon Resins at Elevated
Temperatures
This standard is issued under the fixed designation D6267/D6267M; 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 3. Terminology
1.1 This test method covers the determination of the appar-
3.1 The definitions in Terminology D6440 are applicable to
ent viscosity of hydrocarbon resins having apparent viscosities
this test method.
up to 2,000,000 millipascal seconds (mPa·s) (Note 1)at
3.2 Definition Specific to This Standard:
temperatures up to 300 °C [572 °F].
3.3 apparent viscosity, n—of a hydrocarbon resin, the vis-
NOTE 1—The SI unit of (dynamic) viscosity is the pascal second. The
cosity determined by this test method, expressed in millipascal
centipoise (cP) is one millipascal second (mPa·s) and is frequently used as
seconds.
a viscosity unit.
3.3.1 Discussion—Its value may vary with the spindle and
1.2 The values stated in either SI units or inch-pound units
rotational speed selected.
are to be regarded separately as standard. The values stated in
each system are not necessarily exact equivalents; therefore, to
4. Summary of Test Method
ensure conformance with the standard, each system shall be
4.1 The viscometer described in this test method can be
used independently of the other, and values from the two
used to determine the apparent viscosity of hydrocarbon resins
systems shall not be combined.
at elevated temperatures. Apparent viscosity is determined
1.3 This standard does not purport to address all of the
under temperature equilibrium conditions using a rotating
safety concerns, if any, associated with its use. It is the
spindle type viscometer. The torque on a spindle rotating in a
responsibility of the user of this standard to establish appro-
thermostatted sample holder containing a small amount of
priate safety, health, and environmental practices and deter-
sample is used to measure the relative resistance to rotation.A
mine the applicability of regulatory limitations prior to use.
factor is applied to the torque reading to yield the viscosity in
1.4 This international standard was developed in accor-
mPa·s.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Significance and Use
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
5.1 This test method is used to measure the apparent
Barriers to Trade (TBT) Committee.
viscosity of hydrocarbon resins at elevated temperatures.
Elevated temperature viscosity values of a hydrocarbon resin
2. Referenced Documents
may be related to the properties of coatings, adhesives and the
like, containing such a resin.
2.1 ASTM Standards:
D6440 Terminology Relating to Hydrocarbon Resins
5.2 For hydrocarbon resins, values of apparent viscosity
E691 Practice for Conducting an Interlaboratory Study to
will usually be a function of shear rate under the conditions of
Determine the Precision of a Test Method
test. Although the type of viscometer described in this test
E1 Specification for ASTM Liquid-in-Glass Thermometers
method operates under conditions of relatively low shear rate,
shear rate depends on the spindle and rotational speed selected
for a determination; therefore, comparisons between apparent
This test method is under the jurisdiction of ASTM Committee D01 on Paint
viscosity values should be made only for measurements made
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.34 on Pine Chemicals and Hydrocarbon Resins.
with similar viscometers under conditions of equivalent shear
Current edition approved Dec. 1, 2022. Published December 2022. Originally
rate.
approved in 1998. Last previous edition approved in 2017 as D6267 – 13 (2017).
DOI: 10.1520/D6267_D6267M-13R22.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 6. Apparatus
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.1 Rotational Viscometer—rotating-spindle type with lev-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. eling stand.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D6267/D6267M − 13 (2022)
TABLE 1 Suitable ASTM Thermometers
6.2 Viscometer Spindles, stainless steel. (Warning—Care
must be taken in the storage and handling of spindles and Scale
Temperature Immersion
Error,
assemblies. Protect them from scratches, dust, corrosion or
Range mm
max
deposits, and mechanical abuse. Replace the spindle extension
90 °C - 170 °C 51 0.2 °C
if it is bent.Avoid touching the calibrated section of the spindle
94 °F - 338 °F 51 0.5 °F
145 °C - 206 °C 76 0.4 °C
with hands. Clean the spindle and sample chamber thoroughly
after each use.Arecommended cleaning procedure is included
in the procedure.)
6.3 Temperature Controller, Thermocontainer (a heater for 8.3.2 Insert the thermometer through the insulating cover of
the sample chamber), and Sample Chamber, designed for use the sample container, into the liquid, and hold it in place at the
with the viscometer in 6.1, complete with locating ring, level required for proper immersion depth. Do not permit the
levelingscrews,safetyguard,spindleextension,insulatingcap, thermometer bulb to rest on the bottom of the sample con-
alignment bracket, cooling plug (optional) and extracting tool. tainer. Adjust the thermal controller set point to provide the
The precision temperature controller shall provide control desired temperature. Repeat this procedure for each test
accuracy of 61.0 °C or better through the range from 100 °C temperature desired.
to150 °C[212 °Fto302 °F]and 62.0 °Corbetterthroughthe
NOTE 3—Particular care must be taken not to overflow the sample
range from 150 °C to 300 °C [302 °F to 572 °F].
chamber when using the 100 °C, 76 mm immersion thermometer, since
the volume of the immersed stem is relatively large.
7. Assembly of Apparatus
7.1 Assemble the apparatus according to the manufacturer’s 9. Procedure
instructions.
9.1 Selection of Spindle—From the estimated viscosity of
the sample and the manufacturer’s instructions, select a vis-
8. Calibration
cometer and spindle combination that will produce readings in
8.1 A digital viscometer should be zeroed according to the
the desired range.
manufacturer’s instructions. For a dial-reading viscometer, no
NOTE 4—Use only spindles appropriate for the viscometer to be used.
zero adjustment is required, since experience has shown that
the zero point will not vary due to changes in the spring.
9.1.1 Wheremorethanonespindleisavailablefortherange
selected, choose the spindle that produces a display or dial
NOTE 2—The viscometer and spindles are precision equipment and
shouldbekeptfromundueshockandmishandling.Physicaldamagetothe
reading between 10 % and 100 % of full scale. The goal is to
instrument will often reveal itself as erratic or no oscillation of the reading
select a combination whose range brackets the estimated
when the instrument, with or without the spindle in place, is operated in
viscosity of the sample.
air. When operating normally, the reading in air will be stable and have
free oscillation about the zero point.
NOTE 5—Accuracy improves as the reading approaches 100 % of full
scale. If the reading is over 100 % of full scale, select a lower speed or a
8.2 The calibration of the instrument may be verified using
smaller spindle, or both. If the reading is under 10 % of full scale, select
standard reference fluids. Suitable fluids are available in
a higher speed or a larger spindle, or both. Whenever possible, when
nominal viscosities up to 15 000 mPa·s at 149 °C [300 °F].The
conducting multiple comparative tests, the same spindle/speed combina-
procedure for instrument calibration using standard reference tion should be used for all tests. When a test must be performed at several
speeds, select a spindle that produces on-scale readings at all required
fluids shall be that described by
...