COMPOSITIONS

摘要

1440217 Polyamides IMPERIAL CHEMICAL INDUSTRIES Ltd 19 Sept 1974 [26 Sept 1973] 45089/73 Heading C3R [Also in Division A5] Polymeric material comprising amide repeat units having the structure wherein the groups R 1 , which may be the same or different, are hydrogen or hydrocarbyl or substituted hydrocarbyl groups, and A and B are divalent groups one or both of which includes the group II wherein the groups R 2 , which may be the same or different, are hydrogen or hydrocarbyl or substituted hydrocarbyl groups, the proportion of nitrogen in the polymeric material derived from the group II being in the range of from 2 to 10% by weight of the polymeric material may be prepared by condensing in substantially equimolar proportions at least one diamine having the structure NHR 1 -A-NHR 1 , or amide-forming derivative thereof, and at least one diacid having the structure or amide forming derivative thereof, optionally together with other polycondensable materials wherein R 1 , R 2 , A and B are as above defined, the diamine and diacid, or amide forming derivatives thereof, being selected to provide a proportion of nitrogen in the polymeric material derived from the group having the structure II in the range 2 to 10% by weight of polymeric material. Examples relate to the preparation of polymers from (1) N,N1-bis(3-aminopropyl)- piperazine and dodecanedioic acid by melt condensation, (2) N,N1-bis(3 - aminopropyl)- piperazine and dodecanedioic acid chloride by interfacial condensation, (3) N,N1-bis(3-aminopropyl(piperazine, hexamethylene diamine and dodecanedioic acid by melt condensation and (4) N,N1-bis-(3-aminopropyl)piperazine, auccinic anhydride, hexamethylene diamine and nonane diamine. The polymers are used as carriers for biologically active composition (see Division A5).