Patent ID: 6103796
Filing Date: 2000-08-15
Classification: C07F,C08K,C09K

Abstract:
An additive useful as a processing stabilizer for polymers comprising a blend of:a) one or more phosphonites or phosphites of formulae I to V (hereinafter defined as component a) ##STR14## in which m is 0 or 1;n' is 0 or 1;p is 0 to 4,each R.sub.10 and each R.sub.11, independently, is a group derived from an aliphatic, or alicyclic or aromatic alcohol containing one or two OH groups; whereby the two --OH groups are not positioned to be able to form a P-containing ring; (hereinafter defined as the monovalent significances of R.sub.10 or R.sub.11 respectively);or both groups R.sub.10 and/or R.sub.11 form a group derived from an aliphatic, alicyclic or aromatic alcohol containing two or more OH groups in such a position that they can form a cyclic group with a single phosphorus atom (hereinafter defined as the divalent significances of R.sub.10 or R.sub.11 respectively);R.sub.12 is --OH, CH.sub.2 OH or C.sub.1-4 alkyl;each R.sub.14 independently is selected from C.sub.1-22 alkyl or C.sub.7-22 aralkyl;X is F or --O--R.sub.10 where R.sub.10 is defined; andY is --O--, --S--, --CH(R.sub.15)-- or --C.sub.6 H.sub.4 --;where R.sub.15 is hydrogen or C.sub.1-8 alkyl or COOR.sub.6 and R.sub.6 is C.sub.1-8 alkyl; withb) micronized zinc oxide.