Standard Classification for Petroleum Waxes for Use in Rubber Compounding

Importancia y uso:

4.1 Petroleum waxes in rubber compounds are commonly used to provide protection from degradation by ozone under static conditions, that is, when there is little or no flexing of the rubber products. The mode of action for this protection is (1) migration of the wax through the rubber to the surface of the product and (2) the formation of an ozone impervious film on the surface.

4.2 This standard classifies the petroleum waxes on the basis of molecular weight. In general, waxes of lower molecular weight (“paraffinic” or “crystalline”) migrate through the rubber more rapidly and form more brittle film than the higher molecular weight waxes (“microcrystalline”). Wax mixtures and blends are commonly used.

4.3 No direct inference of suitability for use in a particular rubber compound is made or implied by the classifications herein.

Subcomité:

D11.20

Referida por:

D5899-24

Volúmen:

09.01

Número ICS:

75.140 (Waxes, bituminous materials and other petroleum products)