Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Reexamination Certificate
2006-06-13
2006-06-13
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...
C526S348000, C526S124300, C502S103000, C502S115000, C502S125000
Reexamination Certificate
active
07060763
ABSTRACT:
The present invention relates to a MgCl2.mEtOH adduct in which m is from 2.5 to 3.2 optionally containing water up to a maximum of 1% wt based on the total weight of the adduct, characterized by a DSC profile in which the highest melting Temperature (Tm) peak is over 109° C. and has an associated fusion enthalpy ( H) of 103 J/g or lower. Catalyst components obtained from the adducts of the present invention are capable to give catalysts for the polymerization of olefins characterized by enhanced activity with respect to the catalysts prepared from the adducts of the prior art.
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Database CA Online; Chemical Abstracts Service, Columbus OH, Mitsui Toatsu Chemicals, Inc., Japan; “Polymerization of alpha-olefins;” retrieved from STN; Database accession No. 102:132653; XP002254446.
Database CA Online; Chemical Abstracts Service, Columbus OH, Xiaoyu Hong et al; “Preparation of spherical MgC12-supported catalyst by spraying for propylene polymerization;” retrieved from STN; Database accession No. 121:206070; XP002254447.
Database CA Online; Chemical Abstracts Service, Columbus OH, Feng-Lou Zou et al; “FTIR study on the preparation of supported catayst for propylene polymerization;” retrieved from STN; Database accession No. 131:243659; XP002254448.
T. Garoff et al., “The influence of water of crystallization on the performance of a Ziegler-Natta catalyst in propylene polymerization;” Transition Met. Organomet. Catal. Olefin Polym., Proc. Int. Symp.; Editors: W. Kaminsky, H. Sinn; Publisher: Springer, Berlin, Fed. Rep. Ger.; p. 198-199 (1987).
Collina Gianni
Evangelisti Daniele
Basell Poliolefine Italia s.r.l.
Choi Ling-Sui
Raphael Jarrod N.
Reid William R.
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