ASTM D4559-99e1

Standard Test Method for Volatile Matter in Silicone Fluid

SCOPE
1.1 This test method describes a procedure for determining the volatile matter in silicone fluids used for electrical insulation.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Apr-1999
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D27 - Electrical Insulating Liquids and Gases
• Drafting Committee: D27.07 - Physical Test

Relations

• Replaces: ASTM D4559-99 - Standard Test Method for Volatile Matter in Silicone Fluid
• Effective Date: 10-Apr-1999
• Replaced By: ASTM D4559-99(2004) - Standard Test Method for Volatile Matter in Silicone Fluid
• Effective Date: 01-Oct-2004
• Referred By: ASTM D4652-20 - Standard Specification for Silicone Liquid Used for Electrical Insulation
• Effective Date: 10-Apr-1999
• Referred By: ASTM D2225-20 - Standard Test Methods for Silicone Liquids Used for Electrical Insulation
• Effective Date: 10-Apr-1999
• Referred By: ASTM D5282-05(2020) - Standard Test Methods for Compatibility of Construction Material with Silicone Fluid Used for Electrical Insulation
• Effective Date: 10-Apr-1999

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation: D 4559 – 99
Standard Test Method for
1
Volatile Matter in Silicone Fluid
This standard is issued under the fixed designation D 4559; 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
e NOTE—Reference to a research report was added in February 2004.
1. Scope 4.2 The outcome will be affected directly by the presence of
any high vapor pressure material in the sample, such as
1.1 This test method describes a procedure for determining
solvents or low molecular weight silicones.
the volatile matter in silicone fluids used for electrical insula-
4.3 A high volatile content could also indicate the presence
tion.
of a depolymerization catalyst in the fluid. The time and
1.2 This standard does not purport to address all of the
temperature specified in this test method are ideal for detecting
safety concerns, if any, associated with its use. It is the
the effect of such a material, as the depolymerization takes
responsibility of whoever uses this standard to consult and
place at a highly accelerated rate and the low molecular weight
establish appropriate safety and health practices and deter-
components are rapidly evaporated. The result is a very
mine the applicability of regulatory limitations prior to use.
significant weight loss during the test period. The exact amount
2. Referenced Documents
depends on the type and amount of catalyst present. The
2
conditions specified in the method should not cause measure-
2.1 ASTM Standards:
able depolymerization of silicone if such a catalyst is not
D 923 Test Method for Sampling Electrical Insulating Liq-
present.
uids
D 2225 Test Methods for Silicone Fluids Used for Electrical
5. Apparatus
Insulation
5.1 Air-circulating Oven, capable of meeting the require-
D 4652 Specification for Silicone Fluid Used for Electrical
ments of Specification D 5423.
Insulation
5.2 Griffın Pyrex Beakers, 50-mL, with the following di-
D 5423 Specification for Forced-Convection Laboratory
mensions:
Ovens for Evaluation of Electrical Insulation
5.2.1 Outside Diameter—42 6 0.6 mm.
3. Summary of Test Method 5.2.2 Wall Thickness—0.14 to 0.165 mm.
5.3 Analytical Balance, capable of measuring to 1 mg.
3.1 Specimens are weighed before and after heating for a
specific time in a forced air oven to determine weight loss.
6. Sampling
4. Significance and Use
6.1 Obtain a sample of the silicone fluid to be tested using
appropriate ASTM sampling apparatus in accordance with Test
4.1 High values may indicate contamination of the silicone
Methods D 923.
with other materials, inadequate removal of volatile compo-
nents by the producer, or the presence of a depolymerization
7. Procedure
catalyst.
7.1 Clean two 50-mL beakers by washing in toluene,
followed by a rinse in acetone or other appropriate cleaning
method.
1
This test method is under the jurisdiction of ASTM Committee D27 on
7.2 Bake two 50-mL beakers at 150 6 5°C for a minimum
Electrical Insulating Liquids and Gases and is the direct responsibility of Subcom-
of 1 h, transfer to a desiccator using clean, dry gloves or
mittee D27.07 on Physical Test.
crucible tongs and cool the beakers to ambient temperatures.
Current edition approved April 1
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