Process for the recovery of essentially pure amorphous polyolefins
Abstract
Abstract A PROCESS FOR THE SEPARATION OF ALPHA-OLEFIN POLYMERS HAVING DIFFERENT STERIC STRUCTURES WHICH COMPRISES ADJUSTING THE CONCENTRATION OF A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREO-REGULAR CRYSTALLINE POLYMER AND SEMICRYSTALLINE STEREOBLOCK POLYMER TO 10-40 WEIGHT PERCENT OF POLYMER, CENTRIFUGING AND RECOVERING A SUBSTANTIALLY PURE STEREOREGULAR POLYMER, AND A SOLUTION OF AMORPHOUS POLYMER CONTAINING IN SUSPENSION STEREOBLOCK POLYMER, ADJUSTING, IF NECESSARY, THE CONCENTRATION OF THE LATTER SOLUTION TO 5-15 WEIGHT PERCENT POLYMER, FILTERING THE SOLUTION TO RECOVER SUBSTANTIALLY PURE STEREOBLOCK POLYMER, AND A FILRATE CONTAINING AMORPHOUS POLYMER, AND RECOVERING SUBSTANTIALLY PURE AMORPHOUS POLYMER FROM THE FILTRATE.
Inventors
- 👤 Elmer J Hollstein
- 👤 Lewis W Hall Jr
Bibliographic Details
Claims Analysis
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