Pentaerythritol distearate

Pentaerythritol distearate Cutina PES Consistency wax with sensorial benefits... 

Fig. 4.17 Chemical structure of pentaerythritol distearate (main component in Cutina PES).

Pentaerythritol Ester As with glycerol esters, the esters are produced by esterification of pentaerythritol with the desired fatty acids. For example, under defined reaction conditions and use of stearic acid in defined concentration, pentaerythritol distearate has been recently developed as an off-white wax with very weak odor (Cutina PES). This type of product is offered as co-emulsifier and consistency factor for cosmetic products with high sensorial elegance and can be applied in various formulations (Fig. 4.17). 

For optical applications requiring extreme clarity it is desirable to minimize silver streaking, and yellowing. For example, Topas 5013 can be modified pentaerythritol tetrastearate, pentaerythritol distearate, or zinc stearate in order to improve the optical properties (59). These blends are suitable for high precision optical applications. 

Figure 2.9 Molecular model of a molecule of pentaerythritol distearate bonded to the sodium ion on the clay surface showing two hydroxyls and one ester linkage bonding to the sodium.

Chem. Descrip. Pentaerythritol distearate Ionic Nature Nonionic... 

EINECS 248-889-6 2-(Hydroxymethyl)-2-(((1-oxoocta-decyl)oxy)methyl)propane-1,3-diyl distearate Octadeoa-noic acid, 2-(hydroxymethyl)-2-(((1-oxooctadecyl)oxy)-methyl)-1,3-propanediyl ester Pentaerythritol tristearate Stearic acid, triester with pentaerythritol. 

Formula RC0-0CH2C(CH20H)2CH20-RC0, RCO- rep. oleic acid radical Uses Emollient in cosmetics defoamer in food-contact paper/paperboard Regulatory FDA 21CFR 176.210 Pentaerythrityl distearate CAS 13081-97-5 EINECS/ELINCS 235-991-0 Synonyms Octadecanoic acid, 2,2-bis (hydroxymethyl)-1,3-propanediyl ester Definition Diester of pentaerythritol and stearic acid... 

Ester lubricants ate based frequently on pentaerythritol. The mixed mono- and distearate ester blend is particularly useful in wire and cable compounds for improving output and providing a smooth surface without bloom. It is often used in combination with low-MW PE wax in high-speed extmsions. Some use has also been made in rigid PVC profile extmsions, for similar reasons. The latter application has also seen use of pentaerythritol tetrastearate, a lubricant of somewhat lower cost than the mono/diblend. The tetrastearate is, however, more external in rigid PVC and thus more prone to bloom or deposit. 

Sometimes, a multifunctional ester such as a pentaerythritol mono/distearate blend is added. The latter has sufficient polymer compatibility to be highly bloom-resistant, even at these levels. In molded articles, shape complexity requires enhanced release about 0.1 phr of EBS may be added. 

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