ASTM D8043-20
(Guide)Standard Guide for Carbon Black—Shelf Life
Standard Guide for Carbon Black—Shelf Life
SIGNIFICANCE AND USE
3.1 This guide defines the shelf life of carbon black when stored under proper conditions.
SCOPE
1.1 This guide defines the shelf life of carbon black.
1.2 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.
General Information
Relations
Standards Content (Sample)
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.
Designation: D8043 − 20
Standard Guide for
1
Carbon Black—Shelf Life
This standard is issued under the fixed designation D8043; 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 high humidity environments. The only two properties of
carbon black known to change over time are moisture (Test
1.1 This guide defines the shelf life of carbon black.
Methods D1509) and Iodine Number (Test Method D1510).
1.2 This international standard was developed in accor-
The moisture content can change over the short-term (weeks or
dance with internationally recognized principles on standard-
months), depending on the ambient humidity and the surface
ization established in the Decision on Principles for the
area of the carbon black, see 4.4. Iodine Number can change
Development of International Standards, Guides and Recom-
over an extended period (years) due to a slow increase in the
mendations issued by the World Trade Organization Technical
oxygen content on the surface of the carbon black. This
Barriers to Trade (TBT) Committee.
phenomenon is primarily observed with tread grades (N100 –
N300 series) and other high surface area carbon blacks, and
2. Referenced Documents
manifests itself by a slowly decreasing Iodine Number, al-
2.1 ASTM Standards:
though the actual surface area of the carbon black remains
D1509 Test Methods for Carbon Black—Heating Loss
unchanged. For more details about the aging effect on iodine
D1510 Test Method for Carbon Black—Iodine Adsorption
number, see subsection 5.1.1 of Guide D4821.
Number
4.2 The same reasoning for the shelf life of SRBs extends to
D4821 Guide for Carbon Black—Validation of Test Method
commercial carbon black. It should be noted that the slight
Precision and Bias
change in Iodine Number over an extended period does not
D6915 Practice for Carbon Black—Evaluation of Standard
affect actual surface area properties and in-rubber performance
Reference Blacks
of the carbon black.
3. Significance and Use
4.3 The in-rubber properties of a wide range of carbon black
3.1 This guide defines the shelf life of carbon black when
grades have shown no significant change over a 4 year period,
stored under proper conditions.
see Table 1 and Table 2.
4. Carbon Black Shelf Life 4.4 In cases where the carbon black moisture level has
increased over time, heating the carbon black at 125°C for an
4.1 In accordance with Practice D6915, the shelf life of
adequate amount of time will remove the moisture and render
Standard Reference Blacks (SRBs) is defined as indefinite
the material fit for use.
when stored in a manner that protects it from liquid water or
4.5 Based on studies by ASTM Committee D24, the shelf
1 life of carbon black is indefinite.
This guide is under the jurisdiction ofASTM Committee D24 on Carbon Black
and is the direct responsibility of Subcommittee D24.67 on Sustainability.
Current edition approved June 1, 2020. Published June 2020. Originally
5. Keywords
approved in 2016. Last previous edition approved in 2016 as D8043 – 16. DOI:
10.1520/D8043-20. 5.1 carbon black; shelf life
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D8043 − 20
TABLE 1 In-Rubber Properties of Tread Grade Carbon Blacks Over a 4 Year Period
ASTM D3192 (NR) N115 N234 N330
Diff in Diff in Diff in
Absolute ∆IRB-8 Absolute ∆IRB-8 Absolute ∆IRB-8
∆IRB ∆IRB ∆IRB
Unit 2011 2015 2011 2015 values 2011 2015 2011 2015 values 2011 2015 2011 2015 values
Viscosity ML 1 + 4 – 83 79 9 11 2 84 81 12 13 1 72 68 –2 0 2.0
Cure Data ∆min dNm 3.8 3.6 0.6 0.9 0.3 3.7 3.4 0.6 0.7 0.1 2.9 2.7 –0.3 0.0 0.3
∆max dNm 18.8 19.2 0.3 1.3 1.0 20.2 20.4 1.7 2.5 0.8 19.1 18.3 0.4 0.4 0.0
∆max-∆min dNm 15.0 15.6 –0.3 0.4 0.7 16.5 17.0 1.0 1.7 0.7 16.3 15.6 0.7 0.4 –0.3
t10% min 3.2 3.4 0.4 0.6 0.2 2.6 2.5 –0.3 –0.2 0.1 2.7 3.0 –0.2 0.2 0.4
t90% min 34.9 30.5 1.6 4.7 3.1 29.5 23.9 –4.2 –1.8 2.4 31.0 24.7 –2.8 –1.1 1.7
Mooney
t5 min 16.2 16.7 2.8 4.2 1.4 11.5 11.5 –2.1 –1.1 1.0 13.9 13.4 0.5 0.9 0.4
scorch
t35 min 21.4 21.1 4.0 5.0 1.0 14.9 14.5 –2.8 –1.6 1.2 17.6 17.0 0.3 0.9 0.6
Stress-
M300% MPa 9.2 10.3 –3.6 –3.4 0.2 12.9 14.0 –0.2 0.4 0.6 12.9 13.4 0.2 –0.2 –0.4
strain
EaB % 560 560 85 95 10 470 450 –15 –15 0 470 500 0 35 35
Tensile MPa 20.1 21.6 –0.5 0.5 1.0 21.0 20.9 –0.9 –0.2 0.7 20.6 22.1 0.3 1.0 0.7
Shore A – 64 67 –1.5 0.5 2.0 68 70 2 4 2 66 66 0 0 0.0
Di
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D8043 − 16 D8043 − 20
Standard Guide for
1
Carbon Black—Shelf Life
This standard is issued under the fixed designation D8043; 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
1.1 This guide defines the shelf life of carbon black.
1.2 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.
2. Referenced Documents
2.1 ASTM Standards:
D1509 Test Methods for Carbon Black—Heating Loss
D1510 Test Method for Carbon Black—Iodine Adsorption Number
D4821 Guide for Carbon Black—Validation of Test Method Precision and Bias
D6915 Practice for Carbon Black—Evaluation of Standard Reference Blacks
3. Significance and Use
3.1 This guide defines the shelf life of carbon black when stored under proper conditions.
4. Carbon Black Shelf Life
4.1 In accordance with Practice D6915, the shelf life of Standard Reference Blacks (SRBs) is defined as indefinite when stored
in a manner that protects it from liquid water or high humidity environments. The only two properties of carbon black known to
change over time are moisture (Test Methods D1509) and Iodine Number (Test Method D1510). The moisture content can change
over the short-term (weeks or months), depending on the ambient humidity and the surface area of the carbon black, see 4.4. Iodine
Number can change over an extended period (years) due to a slow increase in the oxygen content on the surface of the carbon
black. This phenomenon is primarily observed with tread grades (N100 – N300 series) and other high surface area carbon blacks,
and manifests itself by a slowly decreasing Iodine Number, although the actual surface area of the carbon black remains
unchanged. For more details about the aging effect on iodine number, see subsection 5.1.1 of Guide D4821.
4.2 The same reasoning for the shelf life of SRBs extends to commercial carbon black. It should be noted that the slight change
in Iodine Number over an extended period does not affect actual surface area properties and in-rubber performance of the carbon
black.
4.3 The in-rubber properties of a wide range of carbon black grades have shown no significant change over a 4 year period, see
Table 1 and Table 2. This is an on-going study and will be updated as future data is collected.
4.4 In cases where the carbon black moisture level has increased over time, heating the carbon black at 125°C for an adequate
amount of time will remove the moisture and render the material fit for use.
4.5 Based on studies by ASTM Committee D24, the shelf life of carbon black is indefinite.
5. Keywords
5.1 carbon black; shelf life
1
This guide is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.67 on Sustainability.
Current edition approved June 1, 2016June 1, 2020. Published June 2016June 2020. Originally approved in 2016. Last previous edition approved in 2016 as D8043 – 16.
DOI: 10.1520/D8043-16.10.1520/D8043-20.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D8043 − 20
TABLE 1 In-Rubber Properties of Tread Grade Carbon Blacks Over a 4 Year Period
ASTM D3192 (NR) N115 N234 N330
Diff in Diff in Diff in
Absolute ΔIRB-8 Absolute ΔIRB-8 Absolute ΔIRB-8
ΔIRB ΔIRB ΔIRB
Unit 2011 2015 2011 2015 values 2011 2015 2011 2015 values 2011 2015 2011 2015 values
Viscosity ML 1 + 4 – 83 79 9 11 2 84 81 12 13 1 72 68 –2 0 2.0
Cure Data Δmin dNm 3.8 3.6 0.6 0.9 0.3 3.7 3.4 0.6 0.7 0.1 2.9 2.7 –0.3 0.0 0.3
Δmax dNm 18.8 19.2 0.3 1.3 1.0 20.2 20.4 1.7 2.5 0.8 19.1 18.3 0.4 0.4 0.0
Δmax-Δmin dNm 15.0 15.6 –0.3 0.4 0.7 16.5 17.0 1.0 1.7 0.7 16.3 15.6 0.7 0.4 –0.3
t10% min 3.2 3.4 0.4 0.6 0.2 2.6 2.5 –0.3 –0.2 0.1 2.7 3.0 –0.2 0.2 0.4
t90% min 34.9 30.5 1.6 4.7 3.1 29.5 23.9 –4.2 –1.8 2.4 31.0 24.7 –2.8 –1.1 1.7
Mooney
t5 min 16.2 16.7 2.8 4.2 1.4 11.5 11.5 –2.1 –1.1 1.0 13.9 13.4 0.5 0.9 0.4
scorch
t35 min 21.4 21.1 4.0 5.0 1.0 14.9 14.5 –2.8 –1.6 1.2 17.6 17.0 0.3 0.9 0.6
Stress-
M300% MPa 9.2 10.3 –3.6 –3.4 0.2 12.9 14.0
...
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