Resin composition having improved internal and external lubricating properties employing branched chain high molecular weight ester derivatives of monocarboxylic acids

A resin composition having improved internal and external lubricating properties, comprising polyvinyl chloride or a copolymer thereof and 0,1 to 5% by weight, calculated on the polymer, of one or more acids and/or derivatives thereof selected from the group consisting of

• (a) esters of phenols or aromatic, aliphatic or cycloaliphatic alcohols having at least 1 to 10 primary or secondary hydroxyl groups;
• (b) amides of aliphatic, cycloaliphatic or aromatic mono- or diamines having 1 or 2 primary or secondary amino groups;
• (c) salts of alkali metals or alkaline earth metals, amphoteric metals, heavy metals, of ammonium or of a compound containing a tertiary amino group, characterized in that at least 40 percent by weight of the acid present as such, or at least 40 percent by weight of the acid from which the derivatives are prepared, has a branched-chain structure, and that at least 10 percent by weight thereof corresponds to the formula:
• ##STR6## where x=0, if y=2 or x=2, if y=0;
• R=CH.sub.3 (CH.sub.2).sub.n, where n represents an integer of from 3 to 42;
• b=0 or 1, where
• if b=0, Q represents a hydrogen atom, and
• if b=1, Q represents a CH.sub.2 -group, and
• a=0 or 1, where
• if a=0, Z represents a hydrogen atom, and
• if a=1, Z represents a CH.sub.2 -group.