Standard Test Method for Relative Solvency of Petroleum Oils by the PKP Method

SCOPE
1.1 This test method covers a procedure for determining the relative solvency of petroleum oils used in ink formulations by a pentaerythritol ester of resin acids (PKP) titration.  
1.2 This test method is applicable to petroleum oils that have an initial boiling point over 90oC and a dry point under 500oC as determined by Method D86.
1.3 This test method, along with viscosity measurements as determined by Test Method D445, is used to ensure the compositional consistency of petroleum oils. It can also differentiate between hydrotreated and non-hydrotreated oils that have the same viscosity.  
1.4 This test method includes the use of a U.S. Occupational Safety and Health Administration (OSHA)-designated flammable chemical, pentane. Consult the suppliers' material safety data sheet for specific hazard information and guidance relative to use.  
1.5  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. Specific hazard statements are given in 1.3.

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ASTM D5661-95 - Standard Test Method for Relative Solvency of Petroleum Oils by the PKP Method
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 5661 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Relative Solvency of Petroleum Oils by the PKP Method
This standard is issued under the fixed designation D 5661; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.1 This test method covers a procedure for determining the
relative solvency of petroleum oils used in ink formulations by
3. Terminology
a pentaerythritol ester of resin acids (PKP) titration.
3.1 Definitions:
1.2 This test method is applicable to petroleum oils that
3.1.1 PKP value of a solvent—the volume in millilitres, at
have an initial boiling point over 90°C and a dry point under
25 6 2°C, of pentane required to produce a defined degree of
500°C as determined by Method D 86.
turbidity of a mixture containing 10 g of the test oil and5gof
1.3 This test method, along with viscosity measurements as
a standard solution of a pentaerythritol ester of resin acids in
determined by Test Method D 445, is used to ensure the
toluene.
compositional consistency of petroleum oils. It can also differ-
entiate between hydrotreated and non-hydrotreated oils that
4. Summary of Test Method
have the same viscosity.
4.1 A 40 % solution by weight of PKP in toluene is
1.4 This test method includes the use of a U.S. Occupational
standardized in two steps by mixing with toluene and titrating
Safety and Health Administration (OSHA)—designated flam-
with pentane, and also by mixing with a toluene-heptane
mable chemical, pentane. Consult the suppliers’ material safety
solution and titrating with pentane until a turbidity end point is
data sheet for specific hazard information and guidance relative
reached.
to use.
4.2 The standardized PKP solution is mixed with the test oil
1.5 This standard does not purport to address all of the
and titrated with pentane. The test result is expressed as
safety concerns, if any, associated with its use. It is the
millilitres of pentane.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use. Specific hazard
5.1 PKP values indicate high aromatic or high naphthenic
statements are given in 1.3.
content, or both, which contributes to high relative solvency of
the oil.
2. Referenced Documents
2.1 ASTM Standards:
6. Apparatus
D 86 Test Method for Distillation of Petroleum Products
6.1 Magnetic Stirrer, with stir bar.
D 445 Test Method for Kinematic Viscosity of Transparent
6.2 Erlenmeyer Flask, 1000-mL capacity.
and Opaque Liquids (and the Calculation of Dynamic
6.3 Glass Beaker, 250-mL capacity.
Viscosity)
6.4 Burette, 50-mL capacity.
D 611 Test Method for Aniline Point and Mixed Aniline
6.5 Print Specimen, such as a 152 by 152 mm sheet of
Point of Petroleum Products and Hydrocarbon Solvents
newspaper with 10-point type.
D 841 Specification for Nitration Grade Toluene
6.6 Analytical Balance, 100-g capacity, with reproducibility
of 0.01 g.
This test method is under the jurisdiction of ASTM Committee D-1 on Paint
6.7 Sieve Screen, 10 mesh.
and Related Coatings, Materials, and Applications and is the direct responsibility of
Subcommittee D01.37 on Ink Vehicles.
7. Reagents
Current edition approved Feb. 15, 1995. Published April 1995.
PentalyntK (PKP) is a pentaerythritol ester of dimeric resin acids and is 7.1 Purity of Reagents—Reagent grade chemicals shall be
available from Hercules Incorporated, Resins Group, Hercules Plaza, Wilmington,
used in all tests. Unless otherwise indicated, it is intended that
DE 19894.
Annual Book of ASTM Standards, Vol 05.01.
4 5
Annual Book of ASTM Standards, Vol 06.04. Annual Book of ASTM Standards, Vol 14.02.
D 5661
all reagents conform to the specifications of the Committee on 0.01 g n-heptane. Titrate with pentane as just described. Record
Analytical Reagents of the American Chemical Society where the millilitres of pentane required. This pentane volume is
such specifications are available. Other grades may be used, value B in the equation.
provided it is first ascertained that the reagent is of sufficiently
9. Procedure
high purity to permit its use without lessening the accuracy of
9.1 Weigh out 5.00 6 0.01 g of PKP solution and 10.00 6
the determination.
0.01 g of the ink oil or solvent into a 250-mL glass beaker.
7.2 PKP Solution (40 %)—Weigh
...

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