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US 11,859,073 B2Granted
Compositions for polyolefin foams
AssigneeBraskem America, Inc.
InventorsKimberly Miller McLoughlin, Kevin Herrington
Life of this patent
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Abstract
A foamable composition including a polypropylene-based copolymer and a polyolefin is disclosed. The composition can be used to make a stiff foam with a high closed-cell content. Methods for producing the composition and the foam are provided.
Claims20
A foamable composition, comprising:
- about 5 wt % to about 20 wt % of a polypropylene-based copolymer, based on a total weight of the foamable composition, and
- about 80 wt % to about 95 wt % of a polyolefin, based on the total weight of the foamable composition,
- wherein the foamable composition has a zero-shear viscosity of about 12,000 Pa·s or less at 190° C.
Dependencies are inferred from the claim text.