Classification of PVC Lubricants According to Their Chemical Structure

3 Classification of PVC Lubricants According to Their Chemical Structure [Pg.39]

The division of PVC lubricants according to their chemical structure seems to be the most objective one [4,20,28,29]. It is possible then to distinguish between [Pg.39]

Fatty acids, which act mainly as external lubricants. The higher-molecular-weight acids have a greater affinity to PVC. Stearic acid is the one mostly used because of its low price and its availability. Commercial materials used as lubricants usually contain from 40 to 97% stearic acid and the rest is made of palmitic, myristic, and oleic acids. Example stearine or 12-hydroxy-stearic acid, commercial name, Ceroxin GL. [Pg.40]

High-molecular-weight alcohols, which differ from fatty acids in their action. They have more affinity to PVC and do not exude at concentrations used in practice ( 2%). They are considered internal lubricants. Example cetylstearyl alcohol, commercial name, Stenol PC. [Pg.40]

Metal soaps, which are external lubricants and are among the best mold-release agents. In some cases they improve heat and light stability of PVC. Examples Li, Sr, Ca, Al, Ba, Pb, etc., stearates. [Pg.40]

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