No break polypropylene impact copolymers with melt flow rate higher than 90 g/10 min
AssigneeBraskem S.A.
InventorsMoisés Magalhães Werlang, Joel Carr, Tadeu Forest
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Abstract
Polymer compositions may include a matrix phase comprising a polypropylene-based polymer; and an elastomeric rubber phase; wherein the polymer composition has melt flow rate (MFR) according to ASTM D1238 at 230° C./2.16 kg equal to or greater than 90 g/10 min and at least one feature selected from (I) an Izod impact resistance according to ASTM D256A at 23° C. equal to or greater than 400 J/m; (II) an instrumented drop impact at −30° C., average total energy, equal to or greater than 17 J; or (III) an instrumented drop impact at −30° C., average percent ductility, equal to or greater than 60%.
Claims16
A polymer composition, comprising:
- a matrix phase comprising a polypropylene-based polymer;
- and
- an elastomeric rubber phase comprising a propylene copolymer comprising equal to or less than 35 wt % of one or more comonomers,
- wherein the polymer composition has melt flow rate (MFR) according to ASTM D1238 at 230° C./2.16 kg equal to or greater than 90 g/10 min and a fraction of solubles in xylene according to ASTM D5492 equal to or greater than 20 wt %,
- wherein the polymer composition has been modified by visbreaking with a peroxide agent.
Dependencies are inferred from the claim text.