ASTM D5605-94(2021)

3.1Mooney viscosity is used extensively in the rubber industry as a measurement of the general quality of raw or compounded uncured rubber. This special viscosity has been related to average molecular weight and to handling and processing characteristics in various rubber operations such as mixing, extruding, molding, and so forth.

3.2This practice addresses the raw Mooney viscosity of SBR in its finished state at the SBR manufacturer's plant and in the ready-to-use state at the rubber product manufacturer's plant.

3.3Different processes and different processing equipment often require rubber of the same composition at different raw Mooney viscosity levels. The use of this practice enables producers of SBR to offer each rubber with a number of standard target Mooney viscosity values and informs users which Mooney viscosity rubbers are available.

1.1This practice covers a means for producers and users of emulsion styrene-butadiene rubber (SBR) to establish common target values for the Mooney viscosity of these rubbers.

1.2Mooney viscosity is a widely used measurement for rubber as defined in Test Methods D1646 where the procedure for its measurement is specified.

1.3The Mooney viscosity target value is defined as the midpoint of a Mooney viscosity specification range established by a producer or user of rubber.

1.4This 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.