Castor wax

Castor wax, also called hydrogenated castor oil, is an opaque, white vegetable wax. It is produced by the hydrogenation of pure castor oil often in the presence of a nickel catalyst to increase the rate of reaction.[1] The hydrogenation of castor oil forms saturated molecules of castor wax; this saturation is responsible for the hard, brittle and insoluble nature of the wax.[2]

Uses

Castor wax is used in polishes, oils paints[3] (Old Holland, Lefranc), cosmetics, electrical capacitors, carbon paper, lubrication and coatings and greases where resistance to moisture, oils and petrochemical products is required. Castor wax is also useful in polyurethane coating formulation, as it contains three secondary hydroxyl groups. These coating compositions are useful as a top coat varnish for leather, wood and rubber. Castor wax can also be added to beeswax for encaustic painting.

Properties

References

  1. ^ "Hydrogenated castor oil".
  2. ^ "BBC - GCSE Bitesize: Double bonds and hydrogenation". Archived from the original on 2018-08-18. Retrieved 2018-09-10.
  3. ^ Izzo, Francesca Caterina; Van Den Berg, Klaas Jan; Van Keulen, Henk; Ferriani, Barbara; Zendri, Elisabetta (2014). "Modern Oil Paints – Formulations, Organic Additives and Degradation: Some Case Studies". Issues in Contemporary Oil Paint. pp. 75–104. doi:10.1007/978-3-319-10100-2_5. ISBN 978-3-319-10099-9 – via ResearchGate.

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