# US 8,569,419 B2 · Propylene polymer compositions

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- Number: US 8,569,419 B2
- Document ID: US8569419B2
- Status: Granted
- Kind: B2
- Application number: 13/496,592
- Filed: 2010-08-25
- Published: 2012-07-12
- Granted: 2013-10-29
- Earliest claimed: 2009-09-22
- Assignees: Basell Poliolefine Italia S.r.l.
- Applicants: Paola Massari; Marco Ciarafoni; Gisella Biondini; Tiziana Caputo
- Inventors: Paola Massari; Marco Ciarafoni; Gisella Biondini; Tiziana Caputo
- Web page: https://patentgrep.com/patent/US8569419B2

## CPC

- C08F 297/083: {the monomers being ethylene or propylene}
- C08L 23/12: Polypropene
- C08L 23/16: Ethylene-propylene or ethylene-propylene-diene copolymers
- C08L 2205/02: containing two or more polymers of the same C08L -group
- C08L 2207/02: Heterophasic composition
- C08L 2308/00: Chemical blending or stepwise polymerisation process with the same catalyst
- C08L 2314/02: Ziegler natta catalyst
- C08L 2666/06: Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A propylene composition comprising (percent by weight): A) 70%-95%, of a propylene homopolymer having a Polydispersity Index (P.I.) value of from 4.6 to 10, a fraction insoluble in xylene at 25° C., higher than 90%, and MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 60 to 120 g/10 min; B) 5%-30%, of a copolymer of propylene containing from 34.5% to 30.0% extremes included of ethylene derived units; the composition having an intrinsic viscosity of the fraction soluble in xylene at 25° C. comprised between 3 and 5 dl/g.

## Claims

### Claim 1

A propylene composition comprising (percent by weight):
A) 70%-95%, of a propylene homopolymer having a Polydispersity Index (P.I.) value of from 4.6 to 10, a fraction insoluble in xylene at 25° C., higher than 90%, and MFR L (Melt Flow Rate according to ISO 1133, condition L, i.e. 230° C. and 2.16 kg load) from 60 to 120 g/10 min; and
B) 5%-30%, of a copolymer of propylene containing from 30.0% to 34.5% extremes included of ethylene derived units;
the composition having an intrinsic viscosity of the fraction soluble in xylene at 25° C. comprised between 3 and 5 dl/g.

### Claim 2 (depends on 1)

The composition according to claim 1 wherein component A) has a polydispersity Index (P.I.) value of from 5.1 to 8.

### Claim 3 (depends on 1)

The composition according to claim 1 wherein component A) has an MFR L (Melt Flow Rate according to ISO 1133, condition L, 230° C. and 2.16 kg load) ranging from 80 to 110 g/10 min.

### Claim 4 (depends on 1)

The composition according to claim 1 wherein component B) has from 34.0% to 31.0% by weight of ethylene derived units.

### Claim 5 (depends on 1)

The composition according to claim 1 having an intrinsic viscosity of the fraction soluble in xylene at 25° C. comprised between 3.5 and 5.0 dl/g.

### Claim 6 (depends on 1)

The composition according to claim 1 having a Flexural Modulus is comprised between 1500 MPa and 2000 MPa.

### Claim 7 (depends on 1)

The composition according to claim 1 wherein the MFR L is from 30 to 70 g/10 min.