Castor based Plasticizers
Castor Oil can be alcoholyzed at the ester linkage and esterifies at the hydroxyl group to form plasticizers for many natural, synthetic resins and elastomers, including polyvinyl chloride, nitrocellulose, ethylcellulose and rubber polymers. The plasticizing effect of ricinoleate or hydroxyl stearate is generally characterized by:
~ Excellent softening and flexibilizing to vinyl plastics
~ Good low temperature plasticizing, specifically recommended for rubber and plastics where they compare favourably to adipate esters
~ The lubricating effect is advantageous for vinyl calendering and extrusions, mold release for elastomers and plastics, and in strippable coatings
~ Good electrical properties. Low dissipation factor, and high volume resistivity and dielectric constant
~ Excellent pigment wetting. They are highly recommended for the production of pigment dispersions, or for incorporation in elastomeric or plastic compositions containing pigments or fillers