Process of forming copolymers of maleic anhydride and an aliphatic olefin having at least 30 carbon atoms
Abstract
Abstract MALEIC ANHYDRIDE AND AN ALIPHATIC OLEFIN HAVING AT LEAST 30 CARBON ATOMS PER MOLECULE ARE COPOLYMERIZED IN THE PRESENCE OF A SOLVENT COMPRISING AN ALIPHATIC KETONE HAVING FROM 3 TO 5 CARBON ATOMS, SUCH AS METHYLETHYLKETONE, AND IN THE PRESENCE OF A FREE-RADICAL CATALYST USING A SUFFICIENT AMOUNT OF KETONE TO MAINTAIN NOT ONLY THE REACTANTS BUT ALSO THE COPOLYMER PRODUCTS IN SOLUTION. THE UNREACTED MONOMERS ARE PRECIPITATED FROM THE REACTION PRODUCT SOLUTION IN A FILTERABLE PARTICULATE SOLID FORM BY COOLING THE REACTION PRODUCT SOLUTION TO A TEMPERATURE LESS THAN THE CRYSTALLIZATION TEMPERATURE OF THE ALIPHATIC OLEFIN IN THE PRESENCE OF SUFFICIENT ADDITIONAL AMOUNTS OF KETONE SOLVENT, IF REQUIRED, TO MAINTAIN THE COPOLYMER IN SOLUTION AND PRECIPITATE THE OLEFIN MONOMER IN A FINELY DIVIDED FILTERABLE FORM. THE PRECIPITATED MONOMER CAN THEN BE SEPARATED FROM THE COPOLYMER SOLUTION BY ANY SUITABLE MEANS, SUCH AS FILTRATION.
Inventors
- 👤 Stanley M Hazen
- 👤 William J Heilman
Bibliographic Details
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