Highly stereoregular polypropylene with improved properties

Details Highly stereoregular polypropylene with improved properties Highly stereoregular polypropylene with improved properties

2006-09-26

2006-09-26

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...

C526S124100, C526S124200, C526S124300, C526S142000, C502S103000, C502S118000, C502S125000, C502S127000

Reexamination Certificate

active

07112642

ABSTRACT:
Propylene polymers having a content of isotactic pentads (mmmm) higher than 97%, molecular weight distribution, expressed by the formula (a) ratio, equal to or higher than 6 and a value of formula (b) ratio equal to or lower than 5.5. The said polymers are prepared in the presence of a particular combination of Ziegler-Natta solid catalyst components and highly stereoregulating electron-donor compounds. Laminated articles, in particular bi-axially oriented films and sheets, can be prepared with the said polymersin-line-formulae description="In-line Formulae" end="lead"?{overscore (M)}w/{overscore (M)}n  (a)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?{overscore (M)}z/{overscore (M)}w.   (b)in-line-formulae description="In-line Formulae" end="tail"?

REFERENCES:
patent: 4298718 (1981-11-01), Mayr et al.
patent: 4399054 (1983-08-01), Ferraris et al.
patent: 4469648 (1984-09-01), Ferraris et al.
patent: 4495338 (1985-01-01), Mayr et al.
patent: 2003/0060581 (2003-03-01), Morini et al.
patent: 0573862 (1993-12-01), None
patent: 0728769 (1996-08-01), None
patent: 0782587 (1997-07-01), None
patent: 0 916 701 (1999-05-01), None
patent: 0063261 (2000-10-01), None
patent: 0157099 (2001-08-01), None
patent: 0230998 (2002-04-01), None
patent: 0355831 (2003-07-01), None
Y. Inoue et al., “Studies of the stereospecific polymerization mechanism of propylene by a modified Ziegler-Natta catalyst based on 125 M Hz13C n.m.r. spectra,”Polymer, vol. 25, p. 1640-1644 (1984).
R. Chujo et al., “Two-site model analysis of13C n.m.r. of polypropylene polymerized by Ziegler-Natta catalyst with external alkoxysilane donors,”Polymer, vol. 35(2), p. 339-342 (1994).

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