Polypropylene composition for preparing a foam and a foam comprising the same
OwnerAntti Tapio Tynys, Norbert Reicheltinventors
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Abstract
The present application provides a polypropylene composition for preparing a foam. The polypropylene composition comprises: (a) at least 40.0 wt. % of a long chain branched polypropylene, and (b) at least 20.0 wt. % of a linear polypropylene, wherein the weight amounts are based on the total weight of the polypropylene composition, and wherein the polypropylene composition has a melt flow rate MFR2 (ISO 1133, 2.16 kg load, 230° C.) of at least 2.5 g/10 min. Furthermore, a foam is provided which comprises said polypropylene composition as well as processes for preparing said polypropylene composition and said foam.
Claims20
A polypropylene composition for preparing a foam, wherein the polypropylene composition comprises:
- (a) at least 40.0 wt. % of a long chain branched polypropylene, and
- (b) at least 30.0 wt. % of a linear polypropylene,
- wherein the weight amounts are based on the total weight of the polypropylene composition, and
- wherein the polypropylene composition has a melt flow rate MFR2 (ISO 1133, 2.16 kg load, 230° C.) in a range of 2.5 to 30.0 g/10 min.
The polypropylene composition according to, wherein the long chain branched polypropylene is derived from a long chain branched polypropylene starting material having one or both of the following properties:
- i) a melt strength F30 (ISO 16790:2005) of 20.0 to 50.0 cN,
- ii) a melt extensibility v30 (ISO 16790:2005) in the range of 190 to 320 mm/s.
Dependencies are inferred from the claim text.