US 6,184,326 B2 · Syndiotactic polypropylene

Abstract

The invention provides for highly crystalline syndiotactic polypropylene comprising a high percentage of racemic (r) dyads. The high crystallinity may be due to the polymerization mechanism of metallocene catalysts of a particular structure which appear to produce syndiotactic polypropylene of a new microstructure.

Claims5

Dependent claims

Syndiotactic polypropylene wherein meso triad deviations predominate over meso dyad deviations.

Dependencies are inferred from the claim text.

Facts

Application

08/459,575Filed 2 Jun 1995 · continuation

Priority

20 Mar 1992

Granted

6 Feb 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

C08F 110/06
Monomers containing three or four carbon atoms: propene
C08F 4/65912
Component covered by group C08F4/64 containing a transition metal-carbon bond: in combination with an organoaluminium compound
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Family

Application07/854,150Parent of this continuation · filed 20 Mar 1992

Application07/220,006Parent of this continuation-in-part · filed 15 Jul 1998

US 5,476,914 AParent of this continuation

Application07/854,150Parent of this continuation-in-part

US 6,184,326 B2This patent

From the US filing history. Foreign family members aren’t listed.

Abstract

Facts

Application

08/459,575Filed 2 Jun 1995 · continuation

Priority

20 Mar 1992

Granted

6 Feb 2001

Term ends

Not estimatedThe source records don’t support an estimate.

Classification3 codes

C08F 110/06
Monomers containing three or four carbon atoms: propene
C08F 4/65912
Component covered by group C08F4/64 containing a transition metal-carbon bond: in combination with an organoaluminium compound
C08F
Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds

Family

Application07/854,150Parent of this continuation · filed 20 Mar 1992

Application07/220,006Parent of this continuation-in-part · filed 15 Jul 1998

US 5,476,914 AParent of this continuation

Application07/854,150Parent of this continuation-in-part

US 6,184,326 B2This patent

From the US filing history. Foreign family members aren’t listed.

Syndiotactic polypropylene

Life of this patent

Abstract

Claims5

Syndiotactic polypropylene

Life of this patent

Abstract

Claims5