Norma

Designation: D 1509 – 95 (Reapproved 2000)

Standard Test Methods for

Carbon Black—Heating Loss1
This standard is issued under the fixed designation D 1509; 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. This standard has been approved for use by agencies of the Department of Defense.

1. Scope 1.1 These test methods cover the determination of the heating loss of carbon black at 125°C. This heating loss consists primarily of moisture, but other volatile materials may also be lost. These test methods are not applicable to treatedcarbon blacks that contain added volatile materials, if moisture loss is to be measured. 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 establishappropriate safety and health practices and determine the applicability of regulatory limitations prior to use. 2. Referenced Documents 2.1 ASTM Standards: D 1799 Practice for Carbon Black—Sampling Packaged Shipments2 D 1900 Practice for Carbon Black—Sampling Bulk Shipments2 D 4483 Practice for Determining Precision for Test Method Standards in the Rubber and Carbon Black Industries2 3. Summary of TestMethod 3.1 A carbon black sample is weighed before and after heating for 1 h at 125°C. The observed difference in mass is the heating loss. 4. Significance and Use 4.1 In addition to determining the heating loss (primarily moisture content) of carbon black, these drying conditions are used to prepare samples prior to performing other carbon black tests. 4.2 When larger samples are prepared for othertests, use an open vessel of suitable dimensions so that the depth of the black is no more than 10 mm during conditioning.
1 This test method is under the jurisdiction of ASTM Committee D24 on Carbon Black and is the direct responsibility of Subcommittee D24.31 on Non-Carbon Black Components of Carbon Black. Current edition approved Oct. 10, 1995. Published December 1995. Originally published as D1509 – 57 T. Last previous edition D 1509 – 93a. 2 Annual Book of ASTM Standards, Vol 09.01.

4.3 Carbon black is hygroscopic. The amount of moisture absorbed is related to the surface area of the black and to the relative humidity, ambient temperature, and time to which the material is exposed. Method A—Convection–Gravity Oven Method 5. Apparatus 5.1 Oven, gravity-convection type, capable oftemperature regulation of within 61°C at 125°C and temperature uniformity within 65°C. 5.2 Weighing Bottle, low-form, 30 mm in height and 60 mm in diameter, equipped with a ground-glass stopper. 5.3 Analytical Balance, having a sensitivity of 0.1 mg. 5.4 Desiccator. 6. Sampling 6.1 Samples shall be taken in accordance with Practices D 1799 or D 1900. 6.1.1 Place the samples of carbon black inairtight sample containers. Allow the closed container to reach room temperature before starting the test. 7. Procedure 7.1 Dry the weighing bottle and the stopper, with the stopper removed, in the specified oven set at 125°C for 30 min. Place the bottle and stopper in the desiccator and allow to cool to room temperature. Weigh the bottle with stopper to the nearest 0.1 mg. 7.2 Weigh 2 g of carbon blackinto the weighing bottle to the nearest 0.1 mg. 7.3 Place the weighing bottle, sample, and stopper in the specified oven set at 125°C for 1 h with the stopper removed. 7.4 Replace the stopper and transfer the bottle and contents to the desiccator. Remove the stopper and allow to cool to room temperature. Replace the stopper on the weighing bottle and reweigh to the nearest 0.1 mg.
NOTE 1—Keep...