ISO 3841:1977 PDF

Scope: 1.1 This standard specifies the method for determining the melting point (cooling curve) of petroleum wax. This standard applies to petroleum waxes, but does not apply to petroleum grease, microcrystalline grease, and mixtures of petroleum grease, microcrystalline wax and paraffin wax or crude paraffin wax. 1.2 Melting point (cooling curve) is often widely used by wax suppliers and customers. It is particularly suitable for petroleum waxes with a relatively high paraffin content or crystalline forms. Samples containing a large amount of hydrocarbons that crystallize at the same temperature release heat of fusion during the cooling process, temporarily delaying the cooling rate and forming a stagnation period on the cooling curve. There is generally no stagnation period for petroleum waxes containing a large amount of isoparaffins or non-crystalline ones. Note: Other methods for testing petroleum wax, such as ISO 2207, ISO 6244. Test results may vary due to different methods. For medical petroleum jelly ISO 6244 is usually used.

ISO 3841:1977 history

1977 ISO 3841:1977 Petroleum waxes; Determination of melting point (cooling curve)