Linseed Oil and Castor Oil

Linseed Oil

Refined linseed oil primarily lends itself to uses in the industrial production of paints and coatings. In combination with resins and pigments, linseed oil has long been employed as an ingredient in conventional coatings and inks. Today, there is a demand for refined linseed oil of many different grades. These are obtained by a refining process involving the steps of degumming, deacidification, and bleaching. Linseed oil is used to make synthetic resins, especially linseed alkydes for printing inks, stand oils, and varnishes. Linseed oil is also used as a binder for pigment pastes. Linseed stand oil of varying viscosity and acidity is obtained by polymerization at high temperatures. It is used to produce coatings of many kinds, inks, corrosion-proof and aluminum paints, and brake linings.

Blown linseed oil, thickened with air at high temperatures, exhibits excellent wettability and is therefore used in the ink industry and as a major binder in foundries and paint production.
 
The range of uses is so incredibly broad that even methods thousands of years old are now being revived. Linseed oil is also regaining importance as a renewable raw material.

Castor oil

for technical uses, phamarceuticals and cosmetics.

The unique composition of castor oil opens up a vast range of applications, and also permits it to be chemically transformed into a host of other useful forms. This is due to its unusual molecular structure. The oil is mainly composed of ricinoleic acid, a glyceride that does not otherwise occur in nature and is difficult to synthesize; it is characterized by a hydroxyl group and an isolated double bond. It is highly soluble in alcohol and has a viscosity twenty times greater than that of any other fat or oil of vegetable or animal origin.
 
The main uses of castor oil include the industrial production of coatings based on dehydrated alkyd resins. But it is also employed to make pharmaceuticals and cosmetics, in the textile and leather industries, and for manufacturing plastics and fibers. Polyols for polyurethane systems (especially two-component polyurethane coatings and structural foams) are also derived from it, as well as soaps, printing inks, plasticizers, wetting agents, and lubricants.

Castor oil is an exceedingly versatile industrial raw material, the parts of which can be chemically transformed into many other substances: 

- Ester Group
Fatty acids, glycerine, alcohols, soaps, mono- and diglycerides, amides, amine salts.


- Double Bond
Hydrated castor oil and hydroxystearic acid, polymerized and sulfonated oils.


- Hydroxyl Group

Drying oils (dehydrated castor oil stand oil), sebacic acid, ceprylic alcohol, Turkey red oil, urethane polymers, undecylenic acid and heptaldehyde, alcoxylated castor oils