Continuous preparation of molding materials based on polyphenylene ethers and nylons

Claim 1

A continuous process for the preparation of a thermoplastic molding material based on polyphenylene ethers (PPE) and nylons in an extruder, wherein (I) in a first zone at from 240° to 350° C., (a 1 ) from 50 to 99.95% by weight of a polyphenylene ether, (a 2 ) from 0 to 45% by weight of a vinylaromatic polymer, (a 3 ) from 0.05 to 10% by weight of one or more monomers selected from the group consisting of (a 31 ) α,β-unsaturated carboxylic acids or their derivatives of the general formula I ##STR12## wherein R 1 and R 4 are each hydroxyl, aryloxy, alkoxy, artalkoxy, cycloalkoxy, each of not more than 12 carbon atoms, together form --O-- or --NR 5 --; R 2 and R 3 are each hydrogen, alkylo, cycloalkyl, each of not more than 12 carbon atoms, aryl, chlorine, or together form alkylene of 4 to 12 carbon atoms; the R 5 is hydrogen, the moiety of alkyl, cycloalkyl, aralkyl, aryl, each moiety being not more than 12 carbon atoms, or the moiety is substituted by C 1 -C 4 -alkyl or -alkoxy, (a 32 ) monomers containing amide groups and a polymerizable double bond and (a 33 ) monomers containing lactam groups and a polymerizable double bond, (a 4 ) from 0 to 80% by weight of further graft monomers and (a 5 ) from 0 to 20% by weight of a free radical initiator, the percentages in each case being based on the total weight of components a 1 to a 5 , are reacted for from 0.1 to 15 minutes, and a modified polyphenylene ether A is prepared, and (II) then, without cooling the modified polyphenylene ether, in one or more further zones of the extruder at from 250° to 350° C., (B) from 5 to 95% by weight of a nylon, (C) from 0 to 90% by weight of a nonmodified polyphenylene ether, (D) from 0 to 45% by weight of a vinylaromatic polymer, (E) from 0 to 40% by weight of a rubber impact modifier and (F) from 0 to 60% by weight of additives and processing assistants, the percentages being based on the total weight of components A-F, are added, and the resulting mixture is extruded.