ASTM D4559-99(2018)

Standard Test Method for Volatile Matter in Silicone Fluid (Withdrawn 2022)

SIGNIFICANCE AND USE
4.1 High values may indicate contamination of the silicone with other materials, inadequate removal of volatile components by the producer, or the presence of a depolymerization catalyst.  
4.2 The outcome will be affected directly by the presence of any high vapor pressure material in the sample, such as solvents or low molecular weight silicones.  
4.3 A high volatile content could also indicate the presence of a depolymerization catalyst in the fluid. The time and temperature specified in this test method are ideal for detecting the effect of such a material, as the depolymerization takes place at a highly accelerated rate and the low molecular weight components are rapidly evaporated. The result is a very significant weight loss during the test period. The exact amount depends on the type and amount of catalyst present. The conditions specified in the method should not cause measureable depolymerization of silicone if such a catalyst is not present.
SCOPE
1.1 This test method describes a procedure for determining the volatile matter in silicone fluids used for electrical insulation.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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.
WITHDRAWN RATIONALE
This test method describes a procedure for determining the volatile matter in silicone fluids used for electrical insulation.
Formerly under the jurisdiction of Committee D27 on Electrical Insulating Liquids and Gases, this test method was withdrawn in November 2022. This standard is being withdrawn without replacement because it is obsolete.

General Information

• Status: Withdrawn
• Publication Date: 30-Nov-2018
• Withdrawal Date: 03-Nov-2022
• ICS: 75.100 - Lubricants, industrial oils and related products
• Technical Committee: D27 - Electrical Insulating Liquids and Gases
• Drafting Committee: D27.07 - Physical Test

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: D4559 − 99 (Reapproved 2018)
Standard Test Method for
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Volatile Matter in Silicone Fluid
This standard is issued under the fixed designation D4559; 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 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-
tion. 4.3 A high volatile content could also indicate the presence
of a depolymerization catalyst in the fluid. The time and
1.2 The values stated in SI units are to be regarded as
temperature specified in this test method are ideal for detecting
standard. No other units of measurement are included in this
the effect of such a material, as the depolymerization takes
standard.
place at a highly accelerated rate and the low molecular weight
1.3 This standard does not purport to address all of the
components are rapidly evaporated. The result is a very
safety concerns, if any, associated with its use. It is the
significantweightlossduringthetestperiod.Theexactamount
responsibility of the user of this standard to establish appro-
depends on the type and amount of catalyst present. The
priate safety, health, and environmental practices and deter-
conditions specified in the method should not cause measure-
mine the applicability of regulatory limitations prior to use.
able depolymerization of silicone if such a catalyst is not
1.4 This international standard was developed in accor-
present.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Apparatus
Development of International Standards, Guides and Recom-
5.1 Air-circulating Oven, capable of meeting the require-
mendations issued by the World Trade Organization Technical
ments of Specification D5423.
Barriers to Trade (TBT) Committee.
5.2 Griffın Pyrex Beakers, 50-mL, with the following di-
2. Referenced Documents
mensions:
2
5.2.1 Outside Diameter—42 6 0.6 mm.
2.1 ASTM Standards:
5.2.2 Wall Thickness—0.14 to 0.165 mm.
D923 Practices for Sampling Electrical Insulating Liquids
D5423 Specification for Forced-Convection Laboratory Ov-
5.3 Analytical Balance, capable of measuring to 1 mg.
ens for Evaluation of Electrical Insulation
6. Sampling
3. Summary of Test Method
6.1 Obtain a sample of the silicone fluid to be tested using
3.1 Specimens are weighed before and after heating for a
appropriateASTM sampling apparatus in accordance withTest
specific time in a forced air oven to determine weight loss.
Methods D923.
4. Significance and Use
7. Procedure
4.1 High values may indicate contamination of the silicone
7.1 Clean two 50-mL beakers by washing in toluene,
with other materials, inadequate removal of volatile compo-
followed by a rinse in acetone or other appropriate cleaning
nents by the producer, or the presence of a depolymerization
method.
catalyst.
7.2 Bake two 50-mL beakers at 150 6 5°C for a minimum
of 1 h, transfer to a desiccator using clean, dry gloves or
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This test method is under the jurisdiction of ASTM Committee D27 on
crucible tongs and cool the beakers to ambient temperatures.
Electrical Insulating Liquids and Gasesand is the direct responsibility of Subcom-
Use clean, dry gloves or crucible tongs to handle beakers from
mittee D27.07 on Physical Test.
Current edition approved Dec. 1, 2018. Published December 2018. Originally this point forward. Weigh each beaker to the nearest mg (T).
approved in 1986. Last previous edition approved in 2010 as D4559 – 99 (2010).
7.3 Weigh a 2.0 6 0.2 g sample to the nearest mg in each
DOI: 10.1520/D4559-99R18.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or beaker (W ).
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contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.4 Heat at 150 6 5°C in an air circulating oven for 24 6
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 0.25 h, cool in a desiccator, and reweigh (W ).
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D4559 − 99 (Reapproved 2018)
8. Calculation and Report operating conditions on identical test material would, in the
long run, exceed the value of 0.243 only one case in twenty.
8.1 Calculate the volatile matter in silicone fluid as follows:
9.2 Reproducibility—The difference between two single and
W 2 W
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...