Copolymers and films thereof

Details Copolymers and films thereof Copolymers and films thereof

2005-07-19

2005-07-19

Choi, Ling-Sui (Department: 1713)

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C526S352000, C526S348000, C526S160000, C526S943000, C526S159000, C526S127000

Reexamination Certificate

active

06919414

ABSTRACT:
Novel copolymers comprise ethylene and alpha olefins having from 3 to 10 carbon atoms and which have(a) a density in the range 0.900 to 0.940(b) Mw/Mn of 2-3.4(c) I21/I2from 16 to 24(d) activation energy of flow from 28 to 45 kJ/mol(e) a ratio Ea(HMW)/Ea(LMW)>1.1, and(f) a ratio g′(HMW)/g′(LMW) from 0.85 to 0.95The copolymers are particularly useful in film applications showing an excellent balance of processing, optical and mechanical properties. The novel polymers may suitably be prepared in the gas phase in the presence of metallocene complexes.

REFERENCES:
patent: 0 610 942 (1994-08-01), None
patent: 0 735 060 (1996-10-01), None
patent: WO 94/14855 (1994-07-01), None
patent: WO 95/04761 (1995-02-01), None
patent: WO 97/44371 (1997-11-01), None
patent: WO 98/18843 (1998-05-01), None

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