# US 2014/0155554 A1 · Polypropylene composition

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- Number: US 2014/0155554 A1
- Document ID: US20140155554A1
- Status: Published application
- Kind: A1
- Application number: 14/128,382
- Filed: 2012-07-06
- Published: 2014-06-05
- Earliest claimed: 2011-07-07
- Assignees: Basell Poliolefine Italia S.r.l.
- Inventors: Paola Massari; Marco Ciarafoni; Tiziana Caputo
- Web page: https://patentgrep.com/patent/US20140155554A1

## CPC

- C08L 23/14: Copolymers of propene (C08L23/16 takes precedence)
- C08L 23/0815: {with aliphatic 1-olefins containing one carbon-to-carbon double bond}
- C08L 23/10: Homopolymers or copolymers of propene
- C08L 2312/02: with dienes
- C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06)

## Abstract

A polyolefin composition comprising (percent by weight): A) from 65% to 75% of a propylene homopolymer or a propylene copolymer containing from 0.1% to 5.0% of ethylene derived units having a fraction soluble in Xylene at 25° C. lower than 3 wt %; B) from 25% to 35% of an ethylene copolymer containing from 3% to 12% of propylene derived units; said composition having a melt flow rate (MFR) determined according to ISO method 1133 (230° C. and 2.16 kg) comprised between 11 g/10 min and 50 g/10 min; the xylene soluble fraction ranging from 3% to 15% and the intrinsic viscosity (IV) of the xylene soluble fraction ranging from 0.8 dl/g to 2 dl/g.

## Claims

### Claim 1

A polyolefin composition comprising (percent by weight):
A) from 65% to 75% of a propylene homopolymer or a propylene copolymer containing from 0.1% to 5.0% of ethylene derived units, such homopolymer or copolymer having a fraction soluble in Xylene at 25° C. lower than 3 wt %;
B) from 25% to 35% of an ethylene copolymer containing from 3% to 12% of propylene derived units;
said composition having a melt flow rate (MFR) determined according to ISO method 1133 (230° C. and 2.16 kg) comprised between 11 g/10 min and 50 g/10 min, a xylene soluble fraction ranging from 3% to 15% by weight and an intrinsic viscosity (IV) of the xylene soluble fraction ranging from 0.8 dl/g to 2 dl/g.

### Claim 2 (depends on 1)

The polyolefin composition according to claim 1 comprising (percent by weight) from 67% to 73% of component A) and from 27% to 33% of component B).

### Claim 3 (depends on 1)

The polyolefin composition according to claim 1 having a melt flow rate (MFR) determined according to ISO method 1133 (230° C. and 2.16 kg) comprised between 12 g/10 min and 40 g/10 min.

### Claim 4 (depends on 1)

The polyolefin composition according to claim 1 having the xylene soluble fraction ranging from 3 wt % to 15 wt %.

### Claim 5 (depends on 1)

The polyolefin composition according to claim 1 having the intrinsic viscosity (IV) of the xylene soluble fraction ranging from 0.9 dl/g to 1.5 dl/g.

### Claim 6 (depends on 1)

The polyolefin composition according to claim 1 wherein the component B) has a content of propylene derived units ranging from 4 wt % to 15 wt %; and the whole composition having a melt flow rate (MFR) determined according to ISO method 1133 (230° C. and 2.16 kg) comprised between 11 g/10 min and 28 g/10 min

### Claim 7 (depends on 6)

The polyolefin composition according to claim 6 having a xylene soluble fraction comprised between 6 wt % and 15 wt %.

### Claim 8 (depends on 1)

The polyolefin composition according to claim 1 wherein the component B) has a content of propylene derived units ranging from 1 wt % to 7 wt %; and the whole composition having a melt flow rate (MFR) determined according to ISO method 1133 (230° C. and 2.16 kg) comprised between 29 g/10 min and 50 g/10 min

### Claim 9 (depends on 6)

The polyolefin composition according to claim 6 having a xylene soluble fraction comprised between 2 wt % and 10 wt % %.

### Claim 10 (depends on 1)

Injection moulded articles comprising the polyolefin composition of claim 1.