US 6,368,708 B1 · Polyolefin microspheres

Abstract

Microspheres comprise a polymer or copolymer including one or more of 1) a plurality of C3 or larger alpha-olefin units wherein the polymer has an average number of branch points less than one per monomer unit, and 2) a plurality of C2 alpha-olefin units wherein the polymer has an average number of branch points greater than 0.01 per monomer unit, the microspheres having an average diameter in the range of 1 to 300 micrometers. Optionally, the polymer of the microspheres can be crosslinked. The microspheres can be prepared by suspension or dispersion polymerization processes using aqueous or organic reaction media.

Claims9

Dependent claims

Microspheres comprising a polymer of propylene, said polymer consisting essentially of two repeating units:

{—CH2—CH(CH3)—}x and {—(CH2)3—}y, wherein x is a number from 0.01 to 0.99, and wherein the sum (x+y) is a number from 0.90 to 1.00, said microspheres having an average diameter in the range of 1 to 300 micrometers.

Dependencies are inferred from the claim text.

Facts

Application

08/667,153Filed 20 Jun 1996

Granted

9 Apr 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

C09D 123/20
Homopolymers or copolymers of hydrocarbons having four or more carbon atoms: having four to nine carbon atoms
C08F 10/00
Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double
C09J 123/20
Homopolymers or copolymers of hydrocarbons having four or more carbon atoms: having four to nine carbon atoms
C08F 110/14
Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: monomers containing five or more carbon atoms

Abstract

Facts

Application

08/667,153Filed 20 Jun 1996

Granted

9 Apr 2002

Term ends

Not estimatedThe source records don’t support an estimate.

Classification18 codes

C09D 123/20
Homopolymers or copolymers of hydrocarbons having four or more carbon atoms: having four to nine carbon atoms
C08F 10/00
Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double
C09J 123/20
Homopolymers or copolymers of hydrocarbons having four or more carbon atoms: having four to nine carbon atoms
C08F 110/14
Homopolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond: monomers containing five or more carbon atoms

Polyolefin microspheres

Life of this patent

Abstract

Claims9

Polyolefin microspheres

Life of this patent

Abstract

Claims9