Dehydrated Castor Oil Fatty Acid (DCOFA)

Dehydrated Castor Oil Fatty Acid (DCOFA)

 

Description

Dehydrated Castor Oil Fatty Acid commonly known as DCOFA is a high diene Fatty Acid based on Castor Oil. Three types of DCOFA are offered depending on the conjugation (low, medium and high). DCOFA is liquid at room temperature, having a water-white to pale yellow colour. Dehydration of Castor Oil is carried out at about 2500C in the presence of catalysts (e.g., Concentrated Sulphuric Acid, Activated Earth) and under an inert atmosphere or vacuum. Under this condition of dehydration, the Hydroxyl Group and adjacent Hydrogen Atom from the C-11 or C-13 position of the Ricinoleic Acid portion of the molecule is removed as water. This yields a mixture of two acids, each containing two double bonds but in one case, they are conjugated.

ParametersSpecifications
LowMediumHigh
refractive index at 250C1,473-1,4771,473-1,477 1,473-1,477
specific gravity at 250C 0,903-0,905 0,903-0,9050,903-0,905
colour Regular Gardner max. 2max. 2max. 2
colour Special Gardner max. 1 max. 1 max. 1
acid value 195-205 195-205 195-205
iodine value min. 130 min. 130 min. 130
iodine value160-175160-175 160-175
saponification value 198-208 198-208198-208
hydroxyl value max. 5 max. 5 max. 5
lower components % 1,2-1,4% 1,2-1,4% 1,2-1,4%
palmitic acid % 1,3-1,5% 1,3-1,5% 1,3-1,5%
stearic acid % 1,8-2% 1,8-2% 1,8-2%
oleic acid % 4-6%4-6%4-6%
linoleic acid (non-conjugated)% 45-55% 30-45% 25-30%
linoleic acid (conjugated) % 35-45% 45-60% 60-66%
total Linoleic acid%88-95% 88-95% 88-95%
linolenic acid % max. 0,5% max. 0,5% max. 0,5%
conjugation by UV spectrometer (factor 0,91) min. 30 min. 40 min. 50
  • Note: The product can also be supplied as per specifications provided by the client.
  • Dehydrated castor oil fatty acid is supplied in
  • Stainless drums (190 kg)
  • Bulk Tankers (ISO containers)
  • Flexitank
  • Packing & Marking: As per client's requirements

Dehydrated castor oil fatty acid based alkyd resins and polyamides make up superior constituent in numerous paint and printing inks formulations. Styrenated epoxy esters of these fatty acids are used in prime quality automotive paints.

DCOFA is also used in the manufacture of high solid alkyds, acrylic and epoxy ester resins, which are useful for interior and exterior can coatings, appliance finishes, automotive topcoats, primers, coil coatings, tube coatings, marine finishes, overprint varnishes and high-speed printing inks. Furthermore DCOFA can be used as chemical intermediate because of their conjugate dienes structure.

Used in High speed printing Inks, over Paint varnishes, Containers for food and beverages( Interior/Exterior) , Maintenance primers and top coats, Marine finishes, Tube coating, Automotive, primer and finish coat, Appliance and product finishes & coil coatings.