ASTM D4559-99

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 problems, 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

• Replaced By: ASTM D4559-99e1 - Standard Test Method for Volatile Matter in Silicone Fluid
• Effective Date: 10-Apr-1999
• 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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.
Designation: D 4559 – 99
Standard Test Method for
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. Scope place at a highly accelerated rate and the low molecular weight
components are rapidly evaporated. The result is a very
1.1 This test method describes a procedure for determining
significantweightlossduringthetestperiod.Theexactamount
the volatile matter in silicone fluids used for electrical insula-
depends on the type and amount of catalyst present. The
tion.
conditions specified in the method should not cause measure-
1.2 This standard does not purport to address all of the
able depolymerization of silicone if such a catalyst is not
safety concerns, if any, associated with its use. It is the
present.
responsibility of whoever uses this standard to consult and
establish appropriate safety and health practices and deter-
5. Apparatus
mine the applicability of regulatory limitations prior to use.
5.1 Air-circulating Oven, capable of meeting the require-
2. Referenced Documents ments of Specification D 5423.
5.2 Griffın Pyrex Beakers, 50-mL, with the following di-
2.1 ASTM Standards:
mensions:
D 923 Test Method for Sampling Electrical Insulating Liq-
2 5.2.1 Outside Diameter—42 6 0.6 mm.
uids
5.2.2 Wall Thickness—0.14 to 0.165 mm.
D 2225 TestMethodsforSiliconeFluidsUsedforElectrical
2 5.3 Analytical Balance, capable of measuring to 1 mg.
Insulation
D 4652 Specification for Silicone Fluid Used for Electrical
6. Sampling
Insulation
6.1 Obtain a sample of the silicone fluid to be tested using
D 5423 Specification for Forced-Convection Laboratory
3 appropriateASTM sampling apparatus in accordance withTest
Ovens for Evaluation of Electrical Insulation
Methods D 923.
3. Summary of Test Method
7. Procedure
3.1 Specimens are weighed before and after heating for a
7.1 Clean two 50-mL beakers by washing in toluene,
specific time in a forced air oven to determine weight loss.
followed by a rinse in acetone or other appropriate cleaning
4. Significance and Use method.
7.2 Bake two 50-mL beakers at 150 6 5°C for a minimum
4.1 High values may indicate contamination of the silicone
of 1 h, transfer to a desiccator using clean, dry gloves or
with other materials, inadequate removal of volatile compo-
crucible tongs and cool the beakers to ambient temperatures.
nents by the producer, or the presence of a depolymerization
Use clean, dry gloves or crucible tongs to handle beakers from
catalyst.
this point forward. Weigh each beaker to the nearest mg (T).
4.2 The outcome will be affected directly by the presence of
7.3 Weigh a 2.0 6 0.2 g sample to the nearest mg in each
any high vapor pressure material in the sample, such as
beaker (W ).
solvents or low molecular weight silicones. 1
7.4 Heat at 150 6 5°C in an air circulating oven for 24 6
4.3 A high volatile co
...