Processing aids lubricants, internal

Chem. Descrip. Blend of fatty acid esters and fatty alcohols Uses Processing aid, dispersant, internal lubricant for all rubbers esp. EPDM, SBR, NBR, and CR, molded and extruded mech, goods, footwear, suitable for continuous vulcanization, in], molding Properties Lt, brn, to brn, pellets sp,gr, 0,9 Afranil F [BASF]... 

Uses Internal antistat for PP, LDPE, flexible PVC antifiog, processing aid, lubricant for expandable polymers, food-contact appiics. 

Uses Antioxidant, dispersant, gloss aid, lubricant, internal lubricant, process aid, release agent, softener... 

Substituted Amide Waxes. The product of fatty acid amidation has unique waxlike properties (13). Probably the most widely produced material is N,1S7-distearylethylenediarnine [110-30-5] which has a melting point of ca 140°C, an acid number of ca 7, and a low melt viscosity. Because of its unusuaHy high melting point and unique functionaHty, it is used in additive quantities to raise the apparent melting point of themoplastic resins and asphalts, as an internal—external lubricant in the compounding of a variety of thermoplastic resins, and as a processing aid for elastomers. 

To facilitate and accelerate folding and crystallization of polymer chains, internal plasticizers are often added to PET to serve as crystallation promoters. Such additives are usually based on poly(ether ester)s. These plasticizers are liquids that are typically added at levels of 2-4 wt%. They reduce cycle time in injection moulding operations by increasing the rate of crystalline formation. They also plasticize the resin and act as processing aids by virtue of their lubricating action in the melt. On a molecular level, these plasticizers reduce the intermolecular... 

Some of these processing aids are incorporated into the bulk of the material rather than being directly applied to the surface and are known as internal release agents. In the process of migration to the surface they have an inevitable internal lubrication effect. Most internal lubricants also have an external lubricant effect, particularly at higher concentrations because usually some material finds its way to the exterior. 

Superaid. [EX. Puskas] Dispersants, processing aids, internal lubricants. 

Lubricants and process aids can be either (a) internal, whereby they act in the resin phase to increase melt flow and throughput, prevent shear burning, and resist melt fracture (by reducing viscosity at high shear rate), or (b) external, whereby they act at the interface between resin and other materials to improve release of the composite, promote dispersion of fillers, resist melt fi"acture, and/or reduce friction between resin and process equipment. 

Processing Aids (external and internal lubricants, and so on) Improving processability ... 

Processing aids are usually based on high molecular weight acrylic copolymers (for PVC). They modify the rheology and processing characteristics of the melt. Lubricants are processing aids that function to ease the process and are of two types either internal lubricants (that influence the viscosity, such as calcium stearates) or external lubricants (such as oxidised polyethylene wax). Lead-stabilised PVC lubricants are a part of the stabiliser system. They are important in PVC foam formulations. 

Additives are used for a wide variety of purposes, and may be classified as fillers, anti-oxidants, stabilisers, plasticisers, fire retardants, pigments and lubricants. Anti-oxidants and stabilisers are usually used in rather small quantities in order to prevent degradation of the polymer when it is exposed to air, light and heat the intention here is to maintain the properties of the polymer rather than to modify them. Fillers may be used either simply to produce a cheaper product or to improve the properties, in particular the mechanical properties. Lubricants may be used externally, to prevent adhesion of the polymer to the processing equipment, or internally, either to aid flow during processing or to reduce friction between the product and other materials. 

Internal melt lubrication Metal stearates fatty amides, ester, acids, or alcohols polymeric agents Increased output Reduced melt viscosity and temperature Process energy savings and reduced torque Improved mold-filling Part-surface contamination possible (and reduced printability) Lower physical properties (or higher, depending on the processing aid)... 

Dispersion of fiiiers, pigments, fibers Various additive packages Improved processability of highly filled compounds Similar productivity advantages of internal lubricants Selection and use of processing-aid package complicated to determine... 

Uses Plastics lubricant and processing aid pigment dispersant internal lubricant for PVC, nylon 6, nylon color cones. for adhesives, floor finishes, personal care, plastics, wax blends gellant for oils in personal care prods., pharmaceuticals film-former oil or fragrance encapsulator nonirritating abrasive emollient heat stabilizer food pkg. adhesives, coatings, paper/paperboard, cellophane, rubber articles, lubricants, textiles food-contact defoamer... 

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