Pentaerythritol co-esters

Details Pentaerythritol co-esters Pentaerythritol co-esters

C - Chemistry, Metallurgy

09

K

31/75, 400/9001,

C09K 15/14 (2006.01) C08K 5/37 (2006.01) C08K 5/375 (2006.01)

Patent

CA 1274537

PENTAERYTHRITOL CO-ESTERS Abstract of the Disclosure Pentaerythritol co-esters derived from pentaery- thritol, (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 deterio- ration. 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-do- decylthiopropionate] and (II) pentaerythritol bis[3- (3,5-di-tert-butyl-4-hydroxyphenyl)propionate]-bis[3- n-dodecylthiopropionate). 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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