1. Scope

1.1 This standard 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 may involve hazardous materials, operations, and equipment. This standard does not purport to address all of the safety problems 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.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

D87 Test Method for Melting Point of Petroleum Wax (Cooling Curve)

D445 Test Method for Kinematic Viscosity of Transparent and Opaque Liquids (and Calculation of Dynamic Viscosity)

D721 Test Method for Oil Content of Petroleum Waxes

D938 Test Method for Congealing Point of Petroleum Waxes, Including Petrolatum

D1321 Test Method for Needle Penetration of Petroleum Waxes

D1500 Test Method for ASTM Color of Petroleum Products (ASTM Color Scale)

D1747 Test Method for Refractive Index of Viscous Materials

D1833 Test Method for Odor of Petroleum Wax

D2887 Test Method for Boiling Range Distribution of Petroleum Fractions by Gas Chromatography

D3944 Test Method for Solidification Point of Petroleum Wax

D4419 Test Method for Measurement of Transition Temperatures of Petroleum Waxes by Differential Scanning Calorimetry (DSC)

Keywords

Classification (standards)-rubber; Petroleum wax; Rubber-compounding materials; Rubber-general; Rubber-natural (NR); Rubber-unsaturated; petroleum waxes for use in rubber compounding, classification;

ICS Code

ICS Number Code 75.140 (Waxes, bituminous materials and other petroleum products)

DOI: 10.1520/D4924-89R99

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