Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
2005-01-04
2005-01-04
Nutter, Nathan M. (Department: 1711)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
Reexamination Certificate
active
06838523
ABSTRACT:
Compositions for injection-molding of long, thin-walled, one-piece squeeze tubes include low-density polyethylene having a density less than about 0.925 g/cc and a melt index of at least about 50 g/10 minutes, and polypropylene having a high melt index greater than about 800 g/10 minutes, wherein the high melt index is attained by peroxide degradation of the polypropylene during melt processing. The compositions can also include a polymer that is miscible and compatible with low-density polyethylene and polypropylene for enhancing flow of the molding composition in the mold, the polymer having a glass transition temperature Tgof about −20 to −40° C., and/or metallocene resin having a density less than about 0.915 g/cc.
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European Search Report for European Application No. 0300727.8, filed Mar. 28, 2003; Date completed Feb. 27, 2004; Date Mailed Mar. 9, 2004.
Morin Jeremy
Stevens James
Williams Alan D.
Alston & Bird LLP
Nutter Nathan M.
Sonoco Development Inc.
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