Biodegradable succinimide or aspartic acid polymers - contain imino:di:succinate units, useful as metal chelating agents, incrustation inhibitors, dispersants or builders

摘要

Polymers (P) comprising succinyl repeat units - contain iminodisuccinate units (I). The prepn. of (P) is also claimed, comprising the thermal polymerisation of maleic acid (anhydride) or fumaric acid, or their derivs., in the presence of excess ammonia and opt. comonomers, and opt. then at least partially neutralising the prim. polymer.