ASTM D2372-85(1999)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D2372–85(Reapproved1999)
Standard Practice for
Separation of Vehicle From Solvent-Reducible Paints
This standard is issued under the fixed designation D 2372; 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 niques. Characterization of vehicles is important since they
play a major role in the performance of coatings.
1.1 This practice covers the procedure for the separation of
the vehicle from the pigment in solvent-reducible paint.
4. Apparatus
1.2 In the development of the practice the following mate-
4.1 Centrifuge, high-speed, capable of developing in excess
rials were tested: white soya and white fish oil isophthalic
of 10 000 g.
alkyd semi-gloss enamels, white linseed oil paint, white soya
and white linseed o-phthalic alkyd enamels. It is considered to
NOTE 1—Calculate the gravity developed by the centrifuge as follows:
be applicable to similar materials.
26 2
g 5 1.118 3 10 3 r 3 n (1)
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
where:
r 5 rotating radius, mm, and
responsibility of the user of this standard to establish appro-
n 5 rotating speed, r/min.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5. Procedure
2. Referenced Documents
NOTE 2—If the percent of pigment is desired, see Test Method D 2371
and Test Method D 2698.
2.1 ASTM Standards:
D 2371 Test Method for Pigment Content of Solvent-
5.1 Mix the sample until it is homogeneous, preferably on a
Reducible Paints
mechanical shaker.
D 2698 Test Method for Determination of the Pigment
5.2 Centrifuge about 20 mL of the whole paint on a
Content of Solvent-Reducible Paints by High-Speed Cen-
high-speed centrifuge in excess of 10 000 g (Note 1) for 30
trifuging
min or until s
...