Pentaerythritdiphosphites, process for their preparation and their use as stabilizers

摘要

1. A compound of the formula see diagramm : EP0186628,P12,F1 in which R1 and R2 are independently of one another alkyl of 1 to 8 carbon atoms, R3 is -A-COOR4 , A is a direct bond, methylene or ethylene and R4 is methyl or alkyl of 12 to 18 carbon atoms.