Pentaerythritol co-esters

Details Pentaerythritol co-esters Pentaerythritol co-esters

1986-06-05

1988-03-29

Anderson, Harold D.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560 59, C07C14920

Patent

active

047345195

ABSTRACT:
Pentaerythritol co-esters derived from pentaerythritol, (3-alkyl-4-hydroxyphenyl)-alkanoic acids and alkylthioalkanoic acids or lower alkyl esters of such acids are useful as stabilizers of organic material normally susceptible to oxidative and/or thermal deterioration. The co-esters are advantageously prepared by transesterification of such esters with pentaerythritol. Preferred co-esters are (I) pentaerythritol tris[3-(3,5-di-tert-butyl-4-hydroxylphenyl)propionate]-mono[3-n-dodecylthi opropionate] and (II) pentaerythritol bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]-bis[3-n-dodecylthiopr opionate]. The co-esters are especially useful in stabilizing applications for which physical mixtures of (i) (3-alkyl-4-hydroxyphenyl)alkanoic acid esters of polyols with (ii) polyalkanol esters of alkylthioalkanoic acids have heretofore been proposed.

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"Seenox.TM. 412S (Antioxidant)", Argus Product Data Bulletin, Argus Chemical Div., Witco Chem. Corp., 7/80, 3 pages.

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