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US 12,146,012 B2Granted
Bis-phosphinimide catalysts for olefin polymerization
AssigneeNOVA Chemicals (International) S.A.
InventorCheng Fan
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Abstract
A phosphinimide catalyst system comprises: i) a phosphinimide pre-polymerization catalyst having two phosphinimide ligands, at least one of which is substituted by a phosphinimide moiety; and ii) a catalyst activator. The catalyst system polymerizes ethylene with an alpha-olefin to give high molecular weight ethylene copolymer.
Claims10
A phosphinimide pre-polymerization catalyst having the following structure:
- wherein P is phosphorus;
- N is nitrogen;
- each X is independently an activatable ligand;
- R1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group;
- R2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom;
- a is 1, 2 or 3;
- b is 2, 1, or 0;
- a+b=3;
- c is 0, 1, 2 or 3;
- d is 3, 2, 1 or 0;
- and c+d=3.
8 more elements
A polymerization catalyst system comprising:
- i) a phosphinimide pre-polymerization catalyst having the following structure:
- wherein P is phosphorus;
- N is nitrogen;
- each X is independently an activatable ligand;
- R1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group;
- R2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom;
- a is 1, 2 or 3;
- b is 2, 1, or 0;
- a+b=3;
- c is 0, 1, 2 or 3;
- d is 3, 2, 1 or 0;
- and c+d=3;
- and
- ii) a catalyst activator.
11 more elements
A polymerization process comprising polymerizing ethylene optionally with one or more C3-12 alpha olefins in the presence of a polymerization catalyst system comprising:
- i) a phosphinimide pre-polymerization catalyst having the following structure:
- wherein P is phosphorus;
- N is nitrogen;
- each X is independently an activatable ligand;
- R1 is independently selected from a hydrogen atom, a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom, an alkoxy group, an aryl group, an aryloxy group, an amido group, a silyl group, and a germanyl group;
- R2 is independently a hydrocarbyl group which is unsubstituted or substituted with one or more halogen atom;
- a is 1, 2 or 3;
- b is 2, 1, or 0;
- a+b=3;
- c is 0, 1, 2 or 3;
- d is 3, 2, 1 or 0;
- and c+d=3;
- and
- ii) a catalyst activator.
11 more elements
Dependencies are inferred from the claim text.