Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2005-03-22
2005-03-22
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...
C526S113000, C526S160000, C526S943000, C502S113000, C502S129000, C502S153000, C502S117000
Reexamination Certificate
active
06870015
ABSTRACT:
There are provided:(I) a catalyst component for addition polymerization comprising:(i) a transition metal compound having (a) two cyclopentadiene type anion skeleton-carrying groups, which are linked with each other directly or through a bridging group, and (b) a hafnium atom as its central metal, and(ii) a transition metal compound having (a) two substituted cyclopentadiene type anion skeleton-carrying groups, which are not linked with each other, and (b) a zirconium atom or a titanium atom as its central atom; and(II) a process for producing a catalyst for addition polymerization, which comprises the step of contacting the above catalyst component with a co-catalyst component for activation.
REFERENCES:
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4935474 (1990-06-01), Ewen et al.
patent: 5252529 (1993-10-01), Ueda et al.
patent: 5296565 (1994-03-01), Ueda et al.
patent: 5439994 (1995-08-01), Inoue et al.
patent: 5534473 (1996-07-01), Welch et al.
patent: 5719241 (1998-02-01), Razavi et al.
patent: 6069213 (2000-05-01), Nemzek et al.
patent: 6136936 (2000-10-01), Dall'Occo et al.
patent: 6143682 (2000-11-01), Fisher
patent: 0 128 045 (1984-12-01), None
patent: 60-35008 (1985-02-01), None
patent: 5-255437 (1993-10-01), None
Oshima Hideki
Takaoki Kazuo
Rabago Roberto
Sumitomo Chemical Company Limited
LandOfFree
Catalyst component for addition polymerization, process for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Catalyst component for addition polymerization, process for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalyst component for addition polymerization, process for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3423097