Propylene-ethylene copolymers and process for their preparation

Details Propylene-ethylene copolymers and process for their preparation Propylene-ethylene copolymers and process for their preparation

2006-05-09

2011-11-22

Wu, David W (Department: 1762)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S348000, C526S351000, C502S126000

Reexamination Certificate

active

08063160

ABSTRACT:
Random propylene/ethylene copolymers are provided characterized byEthylene content in the range of 4.5-7% wt;Mw/Mn (via GPC) in the range 3.5-5.5;Mz/Mw (via GPC) lower than 4;absence of 2-1 regioinversion, andMelting Temperature (Tm) (non-nucleated grade) lower than 143° C.The said copolymers show an excellent balance of impact and optical properties which is retained even after visbreaking.

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