Antifriction agents

Some of the more common antifrictional agents are listed in Table 10. Many of these are hydrophobic and may consequently affect the release of medicament. Therefore, lubricant concentration and mixing time should be kept to the absolute minimum. Lubricants may also reduce significantly the mechanical strength of the tablet (see Fig. 12) [29,81]. Stearic acid and its magnesium and calcium salts are widely used, but the... 

Table 10 Some Commonly Used Antifrictional Agents...

Derivatives of cyclic phosphazenes have further been used as thermal stabilizers of various materials, as corrosion inhibitors, antifriction agents,... 

Siloxane containing polyester, poly(alkylene oxide) and polystyrene type copolymers have been used to improve the heat resistance, lubricity and flow properties of epoxy resin powder coatings 43). Thermally stable polyester-polysiloxane segmented copolymers have been shown to improve the flow, antifriction properties and scratch resistance of acrylic based auto repair lacquers 408). Organohydroxy-terminated siloxanes are also effective internal mold release agents in polyurethane reaction injection molding processes 409). 

Maphos . [PPO/SpecialtyChem.] Rios- ate esters lubricant with anticono-sive/antifrictional properties textile wetting agent hard surface detergent dispersant hydrotrope, solubilizer, enmlsifier. 

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