Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2007-06-26
2007-06-26
Rabago, Roberto (Department: 1713)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
C526S351000, C526S134000, C526S170000, C526S065000, C525S053000, C525S248000, C525S251000
Reexamination Certificate
active
10344952
ABSTRACT:
Embodiments of the present invention include a polypropylene homopolymer synthesized from a metallocene catalyst system and methods of forming the homopolymer, the homopolymer having an aluminum and chlorine recoverables value of less than 25 ppm and a xylene solubles of less than 1 wt % relative to the total weight of the homopolymer. The resulting homopolymer has other desirable properties such as a heat deflection temperature at 0.45 MPa of from 90° C. to 110° C., and a MWD value of from 1.7 to 5.0. These properties make embodiments of the homopolymer desirable for films, and in particular for capacitor films.
REFERENCES:
patent: 6143686 (2000-11-01), Vizzini et al.
patent: 6268062 (2001-07-01), DeMeuse
Bossaert Bernard Louis
Chen Michael Chia-Chao
Lin Chon-Yie
Yeh Susan Chia-Yu
ExxonMobil Chemical Patents Inc.
Faulkner Kevin M.
Foster Shawn H.
Rabago Roberto
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