Olefin polymerisation catalyst containing a cycloakane dicarboxylate as electron donor
View Patent ↗A catalyst system useful in polymerizing olefins comprising a solid, hydrocarbon-insoluble catalyst component containing magnesium, titanium and halogen and an internal or external electron donor comprising a substituted hydrocarbyl four to eight-membered cycloalkane dicarboxylate wherein the substituents are positioned on the cycloalkane to place the dicarboxylate groups into adjacent conformational positions and wherein the substitutes contain 1 to 20 carbon atoms and may be joined to the cycloalkane structure to form a bicyclo structure.
1. A solid, hydrocarbon-insoluble, catalyst component containing magnesium, titanium, and halogen further containing an internal electron donor comprising a substituted hydrocarbyl 4-8 membered cycloalkane dicarboxylate wherein the substituents contain 1 to 20 carbon atoms and are joined to the cycloalkane dicarboxylate structure to form a bicyclo structure.
2. The catalyst component of claim 1 wherein the internal electron donor is
wherein R is selected from lower alkyl groups containing 1 to 20 carbon atoms.
3. The catalyst component of claim 1 wherein the internal electron donor is
wherein R is selected from lower alkyl groups containing 1 to 20 carbon atoms.
4. The catalyst component of claim 2 wherein R is ethyl, propyl, isopropyl, n-butyl, isobutyl, s-butyl, t-butyl, n-pentyl, isopentyl, hexyl, 2-ethylhexyl, or octyl.
5. The catalyst component of claim 2 wherein R contains 3 to 8 carbon atoms.
6. The catalyst component of claim 3 wherein R is ethyl, propyl, isopropyl, n-butyl, isobutyl, or s-butyl.
7. The catalyst component of claim 1 at least one substituent group contains 3 to 20 carbon atoms.
8. The catalyst component of claim 1 at least one substituent group contains a hetero atom.