Phosphate Esters

Chemical Name : Triphenyl Phosphate

Uses :

Applications :
PAC’S TPP ( Triphenyl Phosphate ), a white flake having low iron content, meets the known specification of all major manufacturers of photographic safety film, It is a recognized organophosphorus flame retardant used in films sheetings, mouldings and certain coatings. Others important properties are its toughening ability and extremely low volatility in cellulose acetate and triacetate, its good resistance to extremely low volatility in cellulose Acetate and triacetate its good resistance to moisture, and its lack of odour. In most applications, it is combined with other plasticizers but it can be used as a primary flame retardant plasticizers in cast triacetate film and sheeting. These products are clear, tough and tack free, It also improves dimensional stability and dielectric strength. Other applications are in moulded acetate products and in coating based in nitrocellulose , ethyl cellulose and cellulose acetate butyrate.

PAC’ S TPP when used in large proportions is usually combined with a solvent plasticizer to avoid crystallization and a consequent separation, as it is a solid at room temperature. It is more compatible with cellulose triacetate than with secondary cellulose acetate, but can be incorporated in the latter up to about 30 phr without separation. In secondary cellulose acetate, cellulose acetate butyrate, and ethyl cellulose, for film sheeting or moulding material, it is generally combined with other more active plasticizer such as dimethyl phthalate, dimethoxy ethyl phthalate or diethyl phthalate. It can be used alone in cast triacetate film and sheeting, where, as a very approximate guide, the top limit is 35 phr, or less ( 20-25 phr) under severe service conditions. The approximate top limit in melt-extruded sheeting of film is 15 phr of triphenyl phosphate, and injection moulding material it is about 20 phr. Triphenyl phosphate is compatible with cellulose nitrate in amounts up to equal proportions of plasticizer and resin.

Other Films and Sheetings :
Triphenyl phosphate as a plasticizer toughens cellulose acetate and imparts a good balance of properties in other films and sheeting. A solvent plasticizer is generally used along with triphenyl phosphate will reduce cold flow and improved tensile strength. Impact strength is correspondingly reduced. Ultraviolet-light stability is average. Whereas phthalate plasticizers and triacetin tend to increase the flammability of a cellulose acetate composition, triphenyl phosphate reduces flammability considerably. Cellulose acetate sheeting containing 20 phr or more triphenyl phosphate will not continue to burn when ignited and the flame withdrawn.

Moulding Compositions :
Typical moulding applications of triphenyl phosphate are in cellulose acetate, cellulose acetate butyrate, and vinyl copolymer compound which are used in records, vacuum cleaner parts, housings for clocks and appliances, and parts for Christmas tree lighting sets. Triphenyl phosphate is recommended for use in compounds for records based on vinyl chloride-vinyl acetate copolymer for several reasons. Up to 50 % by weight of fillers must be added to the resin to prevent heat distortion, and up to 5 phr triphenyl phosphate is added to wet these fillers. Its wetting actions is possible because it melts at a slightly lower temperature than the resin. It also functions as a surface – active agent in the calendaring process, and as an internal lubricant improving flow characteristics when the records is moulded. As a plasticizer, it controls brittleness in the final product. Its heat stability, low water absorption and low volatility are all advantages over other plasticizer that has been used in these applications.

Benefits :
It is used principally as a non-solvent plasticizer for cellulose acetate films having up to 80% retentivity and giving flexibility and toughness to the films.

An excellent catalyst/inhibitor/chain terminator for the growing polymer chain for the manufacture of polyester fibre.

An excellent fire retardant and plasticizer for synthetic resins viz. Phenol formal-dehyde, decorative laminated sheets etc. It is also used in making stencil blanks, dopes films, varnishes, enamels, plastics, lacquers and for impregnating roofing paper.

Chemical Name : Tricresyl Phosphate

Phosphorus Flame Retardant

TCP ( Tricresyl Phosphate ) is a low viscosity synthetic phosphate ester, Tricresyl Phosphate finds uses in wide variety of applications as Flame retardant plasticizer.

Uses :

TCP is recommended for use in plastisols for fabrics coating & other applications where its low, stable viscosity offers improved processing. TCP can give a driver finish to coated fabrics. TCP has high plasticizing efficiency that enables formulator to achieve better flame retardance at lower cost. It can also be used as flame retardant in phenolic laminates.

The use of proper equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling Product should be stored in cool, dry and well ventilated area away from incompatible materials. Unless stated, shelf life of the product will be 12 months from the date of packing. For additional handling & toxicological information, consult PAC Material safety Data sheet.

Typical Properties :

TAP is recommended for use in plastisols for fabrics coating in formulation of fire resistant fluid and other applications where its low, stable viscosity offers improved processing. TAP can give a driver finish to coated fabrics than other Triaryl phosphate EASTER. TAP has high plastcizers efficiency that enables formulator to achieve better flame retardance at lower cost. It can also be used as flame retardant in phenolic laminates.

The use of proper equipment is recommended. Excess exposure to the product should be avoided. Wash thoroughly after handling. Product should be stored in cool, dry and well ventilated area away from incompatible materials. Unless stated, shelf life of the product will be 12 months from the date of packing. For additional handling & toxicological information, consult PAC Material safety Data sheet.