Agent for increasing the molecular weight of polyester comprising amido alkyl identical malonate, a method for increasing the molecular weight and from said agent for increasing the molecular weight polyesters obtained

摘要

Bio - based polyester resin, comprising at least a bio - based polyester, which has a melting temperature in the range between 50°C. and 170°C, and at least one agent for increasing the molecular weight, wherein the agent for increasing the molecular weight of an alkyl identical malonate set that includes an amido - electrons - required group on a alpha - carbon position has, as is shown in the structure (i), or a tautomer thereof, whereinQ is a hydrocarbon moiety selected from aliphatic hydrocarbon, alicyclic hydrocarbon, aromatic hydrocarbon or optionally heteroatom - containing hydrocarbon,X represents oxygen or sulfur,B is an alkyl identical malonate - group, such as in the structure (a) or a tautomer thereof shown represents, wherein r1 and r2 are each independently represent an aliphatic hydrocarbon, or r1 and r2 are connected to one another, in order to form an alicyclic hydrocarbon, or optionally contain a heteroatom, wherein r1 and r2 a total number of carbon atoms of not more than 8, and n is an integer - number from 2 to 10 represents.