ASTM D4924-21 PDF

Scope: 1.1 This classification is intended to establish a classification system and test methods for petroleum waxes used in rubber compounding primarily as a static protective agent or material for unsaturated rubbers such as styrene-butadiene rubber, polyisoprene rubber, natural rubber, chloroprene rubber, acrylonitrile-butadiene rubber, and polybutadiene rubber. These unsaturated rubbers are subject to ozone cracking. Under certain exposure conditions, waxes retard this cracking. 1.2 This classification is applicable to petroleum waxes used as process aids in rubber compounding. It is not applicable to nonpetroleum waxes such as carnuba wax, candelille wax, or ceresin wax, nor to synthetic hydrocarbon waxes such as polyethylene wax. These non-petroleum waxes display a different behavior on gas chromatographic analysis than do petroleum waxes. 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.

ASTM D4924-21 Referenced Document

ASTM D1321 Standard Test Method for Needle Penetration of Petroleum Waxes
ASTM D1500 Standard Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)
ASTM D1747 Standard Test Method for Refractive Index of Viscous Materials
ASTM D1833 Standard Test Method for Odor of Petroleum Wax
ASTM D2887 Standard Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography
ASTM D3944 Standard Test Method for Solidification Point of Petroleum Wax
ASTM D4419 Standard Test Method for Measurement of Transition Temperatures of Petroleum Waxes by Differential Scanning Calorimetry (DSC)
ASTM D445 Standard Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (the Calculation of Dynamic Viscosity)
ASTM D721 Standard Test Method for Oil Content of Petroleum Waxes
ASTM D87 Standard Test Method for Melting Point of Petroleum Wax (Cooling Curve)
ASTM D938 Standard Test Method for Congealing Point of Petroleum Waxes, Including Petrolatum

2021 ASTM D4924-21 Standard Classification for Petroleum Waxes for Use in Rubber Compounding
2017 ASTM D4924-89(2017) Standard Classification for Petroleum Waxes for Use in Rubber Compounding
1989 ASTM D4924-89(2012) Standard Classification for Petroleum Waxes for Use in Rubber Compounding
1989 ASTM D4924-89(2005) Standard Classification for Petroleum Waxes for Use in Rubber Compounding
1989 ASTM D4924-89(1999) Standard Classification for Petroleum Waxes for Use in Rubber Compounding