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US 2018/0072766 A1Published application
Group 3 Metal Catalyst System and Process to Produce Ethylene Polymers Therewith
AssigneeExxonMobil Chemical Patents Inc.
InventorsGlen E. Alliger, Roger Giovannangeli
Life of this patent
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Abstract
This invention relates to a process to using dimers of a group 3 metal (typically scandium) catalyst compound to produce ethylene polymers, such as ethylene-alpha-olefin copolymers and ethylene-conjugated diene copolymers.
Claims32
A catalyst compound represented by the formula (I):
- where M is a group 3 metal, such as scandium or yttrium;
- M* is a group 3 metal, such as scandium or yttrium;
- each R1, R2, R3, R4, R5, R9, R10, R11, R12, R13, and R14 is, independently, hydrogen, a hydrocarbyl, or a substituted hydrocarbyl, where adjacent R groups optionally form cyclic fused ring systems, such as indene or fluorene;
- each R7 and R15 is, independently,
- —O(R*)— where R* is independently hydrogen, halogen, linear hydrocarbyl, or substituted hydrocarbyl, or -E(R)n—, where E is carbon, silicon, germanium, nitrogen, phosphorus, sulfur, or halogen;
- n is 0, 1, 2, or 3;
- each R is independently hydrogen, halogen, hydrocarbyl, or substituted hydrocarbyl;
- when E is C, Si, or Ge, then n is 2 or 3;
- when E is N or P, then n is 2;
- when E is S, then n is 1;
- and when E is halogen, n is 0;
- and
- each R6 and R8 is, independently, a hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, or silylcarbyl.
10 more elements
A catalyst system comprising an activator and the catalyst compound represented by the formula:
- where M is a group 3 metal, such as scandium or yttrium;
- M* is a group 3 metal, such as scandium or yttrium;
- each R1, R2, R3, R4, R5, R9, R10, R11, R12, R13, and R14 is, independently, hydrogen, a hydrocarbyl, or a substituted hydrocarbyl, where adjacent R groups optionally form cyclic fused ring systems, such as indene or fluorene;
- each R7 and R15 is, independently, -E(R)n—, where E is carbon, silicon, germanium, nitrogen, phosphorus, oxygen, sulfur, or halogen, such as fluorine, chlorine, bromine, or iodine;
- n is 0, 1, 2, or 3;
- each R is independently hydrogen, halogen, hydrocarbyl, or substituted hydrocarbyl;
- preferably when E is C, Si, or Ge, then n is 2 or 3;
- when E is N or P, then n is 2;
- when E is O or s, then n is 1;
- and when E is halogen, n is 0;
- and
- each R6 and R8 is, independently, a hydrogen, halogen, hydrocarbyl, substituted hydrocarbyl, or silylcarbyl.
9 more elements
Dependencies are inferred from the claim text.