HDPE resins for use in pressure pipe and related applications

Details HDPE resins for use in pressure pipe and related applications HDPE resins for use in pressure pipe and related applications

2010-03-17

2011-10-18

Seidleck, James J (Department: 1765)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C525S191000

Reexamination Certificate

active

08039556

ABSTRACT:
The present invention provides bimodal polyethylene resins in which the high molecular weight ethylene copolymer component typically has a relatively narrow molecular weight distribution, with short chain branching content being substantially constant across its molecular weight distribution. The resins of this invention are typically characterized by improved toughness and resistance to slow crack propagation properties making them useful for pressure pipe applications.

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