A PROCESS FOR TREATMENT OF POLYMERS USING A SPOUTED BED MIXER

摘要

The present invention relates to a process for the chemical treatment of polymers comprising the following steps: i) providing a polymer P); ii) introducing the polymer P) into a spouted bed mixer; iii) keeping the polymer P) within the spouted bed mixer such that the mean residence time _Tof the polymer P) in the spouted bed mixer is at least 1 minute; iv) optionally, contacting the polymer P) with a chemical substance B) in the spouted bed mixer during step iii); v) withdrawing the polymer from the spouted bed mixer whereby a chemical substance A) is added to the polymer P) during the course of steps i) to iii) or, in case step iv) is present during the course of steps i) to iv) whereby polymer (P) is in particulate form, and a gas (G) is introduced into the spouted bed mixer during step iii). The present invention furthermore relates to a spouted bed mixer for the chemical treatment of polymers comprising feeding means for feeding polymer to the spouted bed mixer whereby the feeding means are equipped with means for contacting the polymer with a chemical substance A) prior to feeding to the spouted bed mixer. The present invention furthermore, relates to the use of a spouted bed mixer in the production of high melt strength polypropylene and to a polymer obtainable by the process according to the invention.