Improvements relating to Alkyl Phosphites

1,173,763. Alkyl phosphite derivatives. PURE CHEMICALS Ltd. 1 Aug., 1967 [8 Sept., 1966], No. 40116/66. Heading C2C. [Also in Division C3] A process for preparing alkyl phosphite derivatives comprises transesterifying a phosphite of formula (R2O) 3 P, where R2 is alkyl or aryl by liberation of the corresponding alcohol or phenol by reaction with at least two alcohols from the group consisting of alkanols, alkanediols, polyalkylene glycols, and hydrogenated bisphenols, one but not more than one being an alkanol, in the presence of an alkaline or secondary phosphite catalyst, the alcohol being present in such proportions as to enable three moles of alcohol or phenol to be formed per mole of aromatic phosphite. The products, some of which are claimed, have the following general formulµ RO-P-(OR1) 2 (RO) 2 -P-OR1 RO-P(OR1)-[-OR11-O-P(OR1)] n -OR (RO) 2 P-[-OR11-O-P(OR1)] n -OR (RO 2 )P-[-OR11-O-P(OR)] n -OR1 (RO) 2 P-[-OR11-O-P(OR)] n -OR R1O-P(OR)-[-OR11-O-P(OR)] n -OR RO-P(OR1)-[-OR11-O-P(OR1)] n -OR1 where R is alkyl or substituted alkyl, R1 is hydroxyalkyl, hydroxyalkoxyalkyl, or substituted alicyclyl, R11 is alkylene, substituted alkylene, alkylenoxy-alkylene or substituted alicyclene, n is an integer. They are used as polymer stabilizers.