Propylene copolymer, polypropylene composition and uses...

Details Propylene copolymer, polypropylene composition and uses... Propylene copolymer, polypropylene composition and uses...

2008-08-04

2010-06-15

Lu, Caixia (Department: 1796)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S160000, C526S165000, C526S348000

Reexamination Certificate

active

07737239

ABSTRACT:
A propylene elastomer (PBER) comprising (a) 50 to 85 mol % of units derived from propylene, (b) 5 to 25 mol % of units derived from 1-butene and (c) 10 to 25 mol % of units derived from ethylene, and having a molar ratio of propylene content to ethylene content of from 89/11 to 70/30, and a modulus in tension (YM), as measured in accordance with JIS 6301, of not more than 40 Mpa.

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U.S. non-final Office Action issued Dec. 17, 2009, in co-pending U.S. Appl. No. 12/185,562.

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