ASTM D3493-03

Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample

SCOPE
1.1 This test method covers the procedure for the mechanical compression of a carbon black sample and the determination of the oil absorption number of the compressed sample.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 09-Jul-2003
• ICS: 83.040.20 - Rubber compounding ingredients
• Technical Committee: D24 - Carbon Black
• Drafting Committee: D24.11 - Carbon Black Structure

Relations

• Replaces: ASTM D3493-01 - Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample
• Effective Date: 10-Jul-2003
• Replaced By: ASTM D3493-04 - Standard Test Method for Carbon Black—Oil Absorption Number of Compressed Sample (COAN)
• Effective Date: 01-Jan-2004
• Referred By: ASTM D4122-17(2023) - Standard Practice for Carbon Black—Evaluation of an Industry Reference Black
• Effective Date: 10-Jul-2003
• Referred By: ASTM D7849-23 - Standard Classification for Nomenclature of Reference Materials of Committee D24
• Effective Date: 10-Jul-2003
• Referred By: ASTM D6915-23 - Standard Practice for Carbon Black—Evaluation of Standard Reference Blacks
• Effective Date: 10-Jul-2003
• Referred By: ASTM D5817-20 - Standard Practice for Carbon Black, Pelleted—Reduction, Blending, and Drying of Gross Samples for Testing
• Effective Date: 10-Jul-2003
• Referred By: ASTM D4821-20 - Standard Guide for Carbon Black—Validation of Test Method Precision and Bias
• Effective Date: 10-Jul-2003
• Referred By: ASTM D7854-21 - Standard Test Method for Carbon Black-Void Volume at Mean Pressure
• Effective Date: 10-Jul-2003
• Referred By: ASTM D3053-23 - Standard Terminology Relating to Carbon Black
• Effective Date: 10-Jul-2003
• Referred By: ASTM D1765-23a - Standard Classification System for Carbon Blacks Used in Rubber Products
• Effective Date: 10-Jul-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D3493–03
Standard Test Method for
Carbon Black—Oil Absorption Number of Compressed
1
Sample (COAN)
This standard is issued under the fixed designation D3493; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope in the mixer chamber of an absorptometer. As the sample
absorbs the oil, the mixture changes from a free-flowing state
1.1 This test method covers the procedure for the mechani-
to one of a semiplastic agglomeration, with an accompanying
cal compression of a carbon black sample and the determina-
increase in viscosity. This increased viscosity is transmitted to
tion of the oil absorption number of the compressed sample.
the torque-sensing system of the absorptometer. When the
1.2 The values stated in SI units are to be regarded as the
viscosity of the mixture reaches a predetermined torque level,
standard. The values given in parentheses are for information
the absorptometer and buret will simultaneously shut off. The
only.
volume of oil added is read from the direct reading buret. The
1.3 This standard does not purport to address all of the
volume of oil per unit mass of carbon black is the oil
safety concerns, if any, associated with its use. It is the
absorption number. Referee testing between suppliers and
responsibility of the user of this standard to establish appro-
users should use DBPoil until such time that precision data is
priate safety and health practices and determine the applica-
available for paraffin oil.
bility of regulatory limitations prior to use.
4. Significance and Use
2. Referenced Documents
4.1 Theoilabsorptionnumberofacarbonblackisrelatedto
2.1 ASTM Standards:
theprocessingandvulcanizatepropertiesofrubbercompounds
D1799 Practice for Carbon Black—Sampling Packaged
2
containing the carbon black.
Shipments
4.2 The difference between the regular oil absorption num-
D1900 Practice for Carbon Black—Sampling Bulk Ship-
2
ber and the oil absorption number of compressed sample is
ments
some measure of the stability of the structure of the carbon
D2414 Test Method for Carbon Black—Oil Absorption
2
black.
Number
D3324 Practice for Carbon Black—Improving Test Repro-
4
5. Apparatus
3
ducibility Using ASTM Standard Reference Blacks
5.1 Balance, analytical, 0.01-g sensitivity.
D 4821 Guide for Carbon Black—Validation of Test
2 5.2 Oven, gravity-convection type, capable of maintaining
Method Precision and Bias
125° 6 5°C.
D4483 Practice for Determining Precision forTest Method
2 5.3 Carbon Black Press, capable of compressing a 25 g
Standards in the Rubber and Carbon Black Industries
5
sample to 165 MPa (24 000 psi).
6
3. Summary of Test Method 5.4 Absorptometer, equipped with a constant-rate buret
3 3
which delivers 67 6 0.4 mm /s (4 6 0.024 cm /min).
3.1 Asample of carbon black is compressed four times in a
5.5 Spatula, rubber, 100-mm.
compression cylinder at a pressure of 165 MPa (24 000 psi)
5.6 Sieve, 850 µm (U.S. No. 20), approximately 125-mm
and then tested in an absorptometer to determine the oil
(5-in.) diameter with receiver pan.
absorption number.
5.7 Brush, approximately 40-mm (1.5-in.), stiff bristle.
3.2 n-Dibutylphthalateorparaffinoilisaddedbymeansof
5.8 Desiccator.
aconstant-rateburettothecompressedsampleofcarbonblack
1 4
This test method is under the jurisdiction ofASTM Committee D24 on Carbon All apparatus is to be operated and maintained in accordance with the
Black and is the direct responsibility of Subcommittee D24.11 on Absorptive manufacturer’s directions for optimum performance.
5
Properties of Carbon Black. Carbon black presses from the following companies have been found satisfac-
Current edition approved July 10, 2003. Published August 2003. Originally tory for this test method: EG&G Engineering, P.O. Box 470710, Tulsa, OK
approved in 1976. Last previous edition approved in 2001 as D3493-01. 74147–0710 and Titan Specialties, Inc., P.O. Box 2316, Pampa, TX 79066-2316.
2 6
Annual Book of ASTM Standards, Vol 09.01. Available from C. W. Brabender Instruments, Inc., 50 E. Wesley St., South
3
Discontinued. See 2002 Annual Book of ASTM Standards,Vol 09.01. Replaced Hackensack, NJ 07606 and from HITEC Luxembourg, 5 Rue de l’Eglise, L-1458,
by D4821. Luxembourg.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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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.
D3493–03
NOTE 2—165MPa(24000psi)isequivalentto131kN(29
...