Patent ID: 6191222
Filing Date: 2001-02-20
Classification: C08L

Abstract:
A polyoxymethylene moulding composition, comprising(i) at least one member selected from the group consisting of polyoxymethylene homopolymers and copolymers,(ii) at least one conventional additive, and(iii) at least one polymeric plastics material as an additive for improving heat stability, wherein:component (iii) is a copolymer which is obtained by polymerization in bulk of a mixture comprising:A) at least one:methacrylate of formula (I), in an amount of 35-90 parts ##STR8##wherein R.sup.1 denotes a linear or branched alkyl radical having 1-12 carbon atoms andone or more acrylates of formula (II) in an amount of 0-25 partsCH.sub.2.dbd.CH--COOR.sup.2 (II)wherein R.sup.2 denotes a linear or branched alkyl radical having 1-12 carbon atoms, where the total amount of methacrylate and acrylate provides 60-90 parts of component A)B) 10-40 parts of at least one member selected from the group consisting of methacrylamide and acrylamide,C) per 100 parts of A)+B), >0.2 to 5 parts of molecular weight regulator, andD) per 100 parts of A)+B), up to 2 parts of lipophilic free radical polymerization initiators, andthe moulding composition comprises component (iii) in an amount of 0.01 to 2 parts, based on the sum of (i)+(ii) where all the amounts relate to parts by weight (wt/wt) and A) and B) together are 100 parts.