Pentaerythritol co-esters containing sulfur in at least one of t

Details Pentaerythritol co-esters containing sulfur in at least one of t Pentaerythritol co-esters containing sulfur in at least one of t

1987-08-31

1988-09-20

Anderson, Harold D.

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

Organic compounds

Carboxylic acid esters

560 59, 252404, 252406, C07C 69612, C07D25134, C08K 513, C08K 524

Patent

active

047727411

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-hydroxyphenyl)propionate]-mono[3-n-dodecylthio propionate]and (II) pentaerythritol bis [3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]-bis[3-n-dodecylthiopropi onate]. 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.

REFERENCES:
patent: 4385143 (1983-05-01), Yachigo et al.

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