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US 7,119,139 B2Granted
Modified polypropylene resins
AssigneeFina Technology, Inc.
InventorAxel Demain
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Abstract
The present invention relates to polypropylene resin compositions comprising a syndiotactic polypropylene incorporating at least one particulate material or chemical additive.
Claims20
A polymer composition comprising:
- A polymer component consisting essentially of:
- a first polymer, wherein the first polymer is a crystalline polymer selected from polypropylene resins prepared with a Ziegler-Natta catalyst, polypropylene resins prepared with a metallocene catalyst, polyethylene resins and combinations thereof;
- and
- at least 20 wt. % of a second polymer, wherein the second polymer comprises a syndiotactic propylene polymer incorporating at least one filler additive, the filler additive selected from particulate material, chemical additives and combinations thereof;
- and
- wherein the polymer composition has a characteristic of at least one of flexibility and impact resistance which is higher than the corresponding characteristic exhibited by the first polymer incorporating the filler additive without the presence of the second polymer.
3 more elements
Dependencies are inferred from the claim text.