General
Dehydrated castor oil is a castor oil from which approximately 5% of the chemically combined water
has been removed. Therefore it has drying properties similar to those of Tung oil. Dehydration is
carried out by heating the oil in the presence of catalysts such as sulphuric acid, phosphoric acid,
clays and metal oxides. Dehydrated castor oil is a yellow oily liquid with characteristic odour.
Standard specifications
Applications
Dehydrated castor oil is an unique drying oil, which imparts good flexibility, fine gloss, toughness,
adhesion, chemical and water resistance to the dry paint film with non-yellowing properties. DCO is a very
suitable and even better substitute for Linseed oil. Paints with DCO are super white and offer superior finish.
Dehydrated castor oil is used as a primary binder for house paints, enamels, caulks, sealants and inks. In
“cooked” varnishes it is combined with all the basic resins, rosins, rosin-esters, hydrocarbons and phenolics to
produce clear varnishes and vehicles for pigmented coatings. DCO is also used in the manufacturing of
lithographic inks, linoleum, putty and phenolic resins.
DCO is used with phenolics to obtain fast drying coatings with maximum alkali resistance as required
in sanitary can lining, corrosion resistant coatings, traffic paints, varnishes, ink vehicles, wire enamels,
aluminium paint appliance finishes and marine finishes.
DCO is also used to obtain fast kettling rate which gives lighter colour and lower acid varnishes.
Packing
Dehydrated castor oil is supplied in:
· drums (190 kg)
· bulk (ISO containers)
