2,6 Di-tert-butyl-para cresol

Introduction :-

Established as a leading Antioxidant  for hydrocarbon products such as Lubricating Oils, Plastics, Rubber, Food Products, Transformer Oil, Industrial Fats, Oils and Fatty Acids, Paper Board Coatings & Paraffin Waxes. Also used in feed & Forage products as antioxidant.

Specifications :-

Physical Properties :-

Specifications :-

Purity wt %                            :           99.0 min
Colour, Molten                        :           50.0 APHA Max
Freezing Point                        :           69.2 °c min
Sulphated Ash % wt               :           0.01 max
Moisture % wt                        :           0.1 max

Applications :-

Plastics :-
Antioxidant systems provide protection to the specific polymer during processing and to function during the service life of finished product. DBPC is ideally suited as antioxidant in a vareity of polymers. Normal concentrations of 50 - 400 ppm are used in low density polyethylene and higher concentrations are used in high density polyethylenes. Also polypropylene is more susceptible to oxidation and such polymers are used and processed at higher temperature. Therefore, antioxidant concentration is normally increased to .25 to 1.0 %. Polystyrene, ABS, Polybutylene, PVC etc. use DBPC as primary oxidant intended to be the free radical scavenger. DBPC does not affect dyes or pigments in plastics and its non-toxic nature permits use in plastic containers and wrapping used for food items.

Rubber :-
DBPC is particularly useful as an antioxidant in natural or synthetic crepe rubber intended for white or light colored products . The principal  characteristic in this application is non-staining and non-discoloration. For most applications DBPC is used in amounts from 0.5 – 2% by weight of rubber hydrocarbon. DBPC is effective for rubbers such as SBR, Nitrile butadiene – acrylonitrile copolymers, Neoprene-type polymer, natural rubbers. DBPC is also found to be especially effective in the latest types of stereospecific elastomers as polyisoprene and polybutadiene.

Lubricating Oils :-
DBPC is proved to be an excellent antioxidant for lubricating oils. The addition of between 0.1 and 1.0% of DBPC to lubricating oils used at moderate or low temperature inhibits or substantially reduces the formation of acids and other corrosive degradation products which cause corrosion of metal bearings of the engine . Also because DBPC is completely soluble in the oil and insoluble in water and caustic solutions, the additive remains in solution in the oil during processing and under service conditions. When used in steam turbine oil, DBPC is effective for the stabilization of the oil against the formation of oxidation products. Cutting oils, spindle oils, hydraulic oils and other specialty oils are stabilized by the addition of DBPC. DBPC also serves as an effective stabilizer for the synthetic lubricating oils.

Aviation Turbine Fuels :-
2,6 DBPC is also approved as an antioxidant for Aviation Turbine Fuels (Kerosene type), as per IS 1571 : 1992. The antioxidant shall be added to a fuel (or fuel component) which has been hydrogen treated. This shall be done immediately after the hydrogen treatment in order to prevent gum formation and peroxidation after manufacture. The total concentration of a active material in fuel shall not be less than 17.0 mg / l noe exceed 24.0 mg / l.

Motor Gasoline :-
The various types of gasolines contain small amounts of oxidisable components which form “gums”. DBPC is an effective antioxidant in this industry combining the advantages of high protection with safe handling, Low cost and long antioxidant efficiency in the service life of the gasoline. It is identified as a suitable antioxidant for motor gasolines, as per IS 2796 : 1995.

Transformer Oils :-
DBPC has been shown to be an excellent antioxidant for extending the life of transformer oils. The life of new transformer oils has been extended five to fifteen fold by the addition of only 0.1% to 0.3% of DBPC. Similar advantages were also evident when used in reclaimed transformer oils. DBPC also inhibits peroxides formation which are responsible for the disintegration of insulation. Therefore, the use of DBPC extends service life of transformer. The addition of DBPC to transformer oil also inhibits sludge formation which impairs the efficiency of high load transformers.

Feed & Forage Products :-
Fine Grind BHT is prepared especially for dry mixing with poultry and animal feed. This facilitates the uniform distribution of  antioxidant throughout the feed. The use of this antioxidant provides the following distinct benefits.

Protects Vitamins:-
The antioxidant BHT functions to retard destruction of fat soluble vitamins A & E during processing and storage and in the digestive tract. As a result, it improves nutritional efficiency , enhances economical vitamin usage and improves the health and growth of birds and animals.

Protects Unsaturated Fatty Acids :-
Antioxidant helps prevent oxidation of unsaturated fatty acids that are necessary for good growth and physiological activity.   Protects Against Rancidity :- DBPC stabilizes added fats, helps prevent the development of undesirable odour, colour and taste in feed.

Industrial Fats, Oils & Fatty Acids :-
DBPC will prevent development of rancidity with subsequent increase in fatty acids and uncombined glycerol in  animal and  vegetable fats &  oils. DBPC is used to stabilize such products in storage and in their various usages such as textile oils, leather treating oils etc.

Paperboard Coating :-
Paperboard cartons often absorb fat or oil from the enclosed foods. The absorbed fatty material is then more intimately in contact with air and consequently may rapidly become rancid. The state or rancid odour produced in the confines of the package often lead to customer rejection although the food product itself is in good condition. A coating of DBPC antioxidant applied in emulsion form to the stock from which the carton is made is highly effective in protecting the absorbed films from oxidation. In so doing, the shelf life of the package is extended many times over that obtained for an unprotected carton.

Paraffin Waxes :-
The addition of 0.1 – 0.2 weight percent of 2,6 DBPC to Paraffin wax or wax blends will inhibit oxidative degradation, thereby preventing the objectionable development of colour and odour.

Storage and Handling :- 
Even though DBPC is relatively non toxic and non irritating, practical safety measures should be observed during handling operation. Solid DBPC can be satisfactorily stored in either metal or fiberboard containers.  DBPC is non-hygroscopic, but closed containers are recommended to avoid a natural yellow discolouration. Molten DBPC should be stored in stainless steel tanks at 80 – 85 °c. DBPC dust or vapours may create irritation of eyes, nose and throat or skin.  Proper water rinse is sufficient for eyes and skin.

Packing :-

RCPL’s 2,6 DBPC is available in 25 kg net paper bags laminated with HDPE woven fabric  and with HMHDPE liner.
Or
50 kg net fibre drums.