Rubber, self lubrication

Elastin is not a true rubber as it is not self-lubricating. It has elastic properties only in the presence of water. At rest, elastin is tightly folded, stabilized by hydrophobic interactions between nonpolar residues this has been termed an oiled coil. On stretching, these hydrophobic interactions are broken, and the nonpolar residues are exposed to water. This conformation is thermodynamically unstable, and once the stretching force is removed, the elastin recoils to its resting state. 

CAS 1317-33-5 EINECS/ELINCS 215-263-9 Uses Dry lubricant on surfaces lubricant in rubber extrusions filler in self-lubricating plastics and powd. metal parts additive in metalworking compds. can act as coating if mixed with binder Properties Blue-gray slippery powd. 0.4-0.45 p particle size m.w. 160.06 ... 

Oil-Bleeding Properties of Self-Lubricating Liquid Silicone Rubbers... 

Fig. 8.21 Electroless tiickel-PTFE deposition, (a) The deposit contains up to 23% by volume of PTFE as dispersed particles. The deposit has a typical composition of Nj 87%-P 7%-PTFE 6%wt. (b) Engineering applications utilize the low-friction corrosion resistance and self-lubricating properties. In addition to the threaded and grooved components shown, examples include bait and butterfly valves, pistons and moulds for plastics or rubbers. (Courtesy Ionic Surface Treatmenti. lonlube coatings by Dudley Division.)...

NF EN 25978 1993 Rubber- Or plastics-coated fabrics. Determination of blocking resistance. ASTM D3702-94(2009) Standard Test Method for Wear Rate and Coefficient of Friction of Materials in Self-Lubricated Rubbing Contact Using a Thrust Washer Testing Machine. 

Folyisobutylenes have foimd manifold applications in the rubber and cable industry they are also used as lubricating oils, as textile finishing and impregnating agents, and for the preparation of self-supporting films and coated fabrics. 

G. is not self-emulsifying but this property can be enhanced by addition of fatty acid alkali - soaps. Uses are mainly in the cosmetic and food industries (- food additives) as emulsifier and stabilizer, but also in the plastic industry as plasticizer and lubricant ( plastics additives) and in rubber (- rubber chemicals). 

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