Loading patent…
AssigneeSentinel Products Corp.
InventorKurt Feichtinger
Estimating the term…
New cross-linked polymeric foam compositions, and methods for making the same, are provided. The new compositions utilize novel cross-linked polyolefin copolymers and show improvements in strength, toughness, flexibility, heat resistance and heat-sealing temperature ranges as compared to conventional low density polyethylene compositions. The new compositions also show processing improvements over linear low density polyethylene. The novel polyolefins, which are essentially linear, comprise ethylene polymerized with at least one alpha-unsaturated C3 to C20 olefinic comonomer, and optionally at least one C3 to C20 polyene, and exhibit, in an uncross-linked sense, a resin density in the range of about 0.86 g/cm3 to about 0.96 g/cm3, a melt index in the range of about 0.5 dg/min to about 100 dg/min, a molecular weight distribution in the range of from about 1.5 to about 3.5, and a composition distribution breadth index greater than about 45 percent.
A foamable, crosslinkable extruded profile comprising a composition including a blend of non-silane-grafted polypropylene with silane-grafted, essentially linear polyolefin, wherein the polyolefin has a resin density in the range of about 0.86 g/cm.sup.3 to about 0.96 g/cm.sup.3, a melt index in the range of about 0.5 dg/min to about 100 dg/min, a molecular weight distribution in the range of from about 1.5 to about 3.5, and a composition distribution breadth index greater than about 45 percent.
A foamable, crosslinkable extruded profile comprising a composition including a blend of substantially ungrafted homopolymer or copolymer polypropylene with a silane-grafted, metallocene catalyzed polyolefin, wherein said polypropylene is not silane cross-linked and is blended with said polyolefin at a ratio by weight of between 99/1 and 50/50, and wherein said polyolefin is silane grafted with a multi-functional vinyl silane selected from the group consisting of vinyl trimethoxy silane and vinyl triethoxy silane.
A crosslinked foam extruded profile comprising a composition including:
Dependencies are inferred from the claim text.