# US 8,785,584 B2 · Propylene-based terpolymers for films

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- Number: US 8,785,584 B2
- Document ID: US8785584B2
- Status: Granted
- Kind: B2
- Application number: 13/639,835
- Filed: 2011-03-01
- Published: 2013-01-31
- Granted: 2014-07-22
- Earliest claimed: 2010-04-14
- Assignees: Basell Poliolefine Italia S.r.l.
- Applicants: Claudio Cavalieri; Fiorella Pradella; Monica Galvan
- Inventors: Claudio Cavalieri; Fiorella Pradella; Monica Galvan
- Web page: https://patentgrep.com/patent/US8785584B2

## CPC

- C08J 5/18: Manufacture of films or sheets
- C08F 210/06: Propene
- C08J 2323/14: Copolymers of propene (C08J2323/16 takes precedence)
- C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29)
- C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS

## Abstract

A propylene/ethylene/1-hexene terpolymer containing from 1.0 wt % to 2.5 wt %, of ethylene derived units and from 2.0 wt % to 4.0 wt % of 1-hexene derived units, the sum of the amounts of propylene, ethylene and 1-.hexene derived units being 100, having the following features: a) the amount (Wt %) of 1-hexene (C6) and the amount (Wt %) of ethylene (C2) fulfill the following relation: C2<−0.18C6+2.86; b) Polydispersity index (PI) ranging from 2 to 10; c) melting temperature ranging from 125° C., to 139° C.; d) solubility in xylene at 25° C. below 10 wt %; e) melt index (MFR) of from 4 to 6 g/10′ dg/min, according to ISO method 1133; and f) crystallization temperature ranging from 85° C. to 100° C.

## Claims

### Claim 1

A propylene/ethylene/1-hexene terpolymer containing from 1.0 wt % to 2.5 wt %, of ethylene derived units and from 2.0 wt % to 4.0 wt % of 1-hexene derived units, the sum of the amounts of propylene, ethylene and 1-hexene derived units being 100, having the following features:
a) the amount (wt %) of 1-hexene (C6) and the amount (wt %) of ethylene (C2) fulfill the following relation:
C2<−0.18C6+2.86;
b) Polydispersity index (PI) ranging from 2 to 10;
c) melting temperature ranging from 125° C., to 139° C.;
d) solubility in xylene at 25° C. below 10 wt %;
e) melt index (MFR) of from 4 to 6 g/10 min, according to ISO method 1133; and
f) crystallization temperature ranging from 85° C. to 100° C.

### Claim 2 (depends on 1)

The terpolymer according to claim 1 wherein the relation of a) is
C2<−0.18C6+2.05.

### Claim 3 (depends on 1)

The terpolymer according to claim 1 wherein the ethylene derived units content ranges from 1.2 wt % to 2.3 wt %.

### Claim 4 (depends on 1)

The terpolymer according to claim 1 wherein the 1-hexene derived units content ranges from 2.1 wt % to 2.9 wt %.

### Claim 5 (depends on 1)

The terpolymer according to claim 1 wherein a melting temperature ranges from 130° C. to 138° C.

### Claim 6 (depends on 1)

The terpolymer according to claim 1 wherein a crystallization temperature ranges from 90° C. to 98° C.

### Claim 7 (depends on 1)

The terpolymer according to claim 1 wherein a seal starting temperature (SIT) is comprised between 100° C. and 120° C.

### Claim 8 (depends on 1)

A film comprising the terpolymer of claim 1.

### Claim 9 (depends on 1)

A biaxially stretched film (BOPP) comprising the terpolymer of claim 1.