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US 9,803,040 B2Granted
Propylene-based terpolymers for films
AssigneeBasell Poliolefine Italia S.r.l.
InventorsRoberta Marzolla, Monica Galvan, Tiziana Caputo
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Abstract
A terpolymer containing propylene, ethylene and an alpha olefins of formula CH2=CHZ wherein Z is an hydrocarbon group having from 2 to 10 carbon atoms wherein: (i) the content of ethylene derived units ranges from 0.5 wt % to 5.0 wt %; (ii) the content of alpha olefin derived units ranges from 1.0 wt % to 5.0 wt %; (iii) the area of the DSC curve after the peak of the melting point (Tm) represents more than 22%; of the total area of the DSC curve; (iv) the polydispersity index (PI) ranges from 2.0 to 7.0.
Claims7
A film comprising a propylene, ethylene and 1-hexene terpolymer comprising:
- (i) an ethylene content of 1.0-3.0 wt %;
- (ii) a 1-hexene content of 2.0-4.0 wt %;
- (iii) an area of a differential scanning calorimetry (DSC) curve after the peak of the melting point (Tm) of greater than about 22% of the total area of the DSC curve;
- and
- (iv) a polydispersity index (PI) of 2.0-7.0;
- wherein the film comprises a melt flow rate (ISO 1133, 230° C., 2.16 kg) of no greater than 6.3 g/10 min and a haze value as measured on a 50 μm cast film of no greater than 0.4%.
3 more elements
Dependencies are inferred from the claim text.