| abstract |
MALEIC ANHYDRIDE AND AN ALIPHATIC OLEFIN HAVING FROM 20 TO 30 CARBON ATOMS, SUCH AS A MIXTURE OF ALPHA-OLEFINS HAVING FROM 20 TO 30 CARBON ATOMS, ARE COPOLYMERIZED IN THE PRESENCE OF A FREE-RADICAL CATALYST AND A SOLVENT SUCH AS A SATURATED DIHALOGENATED ALIPHATIC LIQUID HYDROCARBON HAVING FROM ONE TO FIVE CARBON ATOMS, FOR EXAMPLE PROPYLENE DICHLORIDE. ENOUGH SOLVENT IS EMPLOYED TO SOLUBILIZE NOT ONLY THE REACTANTS BUT ALSO THE COPOLYMER PRODUCTS. THE COPOLYMER IS PRECIPITATED IN A FILTERABLE PARTICULATE SOLID FORM SUBSTANTIALLY FREE OF MONOMERS BY COOLING THE ENTIRE REACTION PRODUCT TO A TEMPERATURE FROM ABOUT 35*C. TO ABOUT 55*C. AND ADMIXING THE COOLED REACTION PRODUCT WITH AN ALIPHATIC MONOHYDROXY ALCOHOL HAVING THREE CARBON ATOMS PER MOLECULE, SUCH AS N-PROPANOL, WHILE MAINTIANING THE DESIRED COOL TEMPERATURE. |