| abstract |
The invention discloses a kind of additive for polymer, including A: containing there are two the phosphinates of substituent group, formula (I) is had the following structure, Wherein, R 1 , R 2 It is identical or different, it is expressed as H, C1-C6 alkyl or C6-C18 aryl；M is Al；M is 3；B: metal sodium element, wherein weight content of the metal sodium element in total additive is 100-900ppm.The additive preparation process that the present invention contains particular range content metal sodium element is simple, production cost is low, it is applied in polymer, the heat-resisting weight-loss ratio of polymer composition can be greatly reduced, 1 TGA of Weight measurement device Pyris is heated using PERKIN ELMER, weight-loss ratio is 0.101wt%-0.250wt% when being kept for 240 minutes under+10 DEG C of nitrogen atmospheres of fusing point, while being able to maintain the excellent anti-flammability of polymer composition. |