Polymerization catalyst system using...

Details Polymerization catalyst system using... Polymerization catalyst system using...

2006-07-18

2006-07-18

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...

C526S351000, C526S124200, C526S124100, C502S103000, C502S116000

Reexamination Certificate

active

07078468

ABSTRACT:
It has been discovered that using di-sec-butyldialkoxysilanes, such as di-sec-butyldimethoxysilane (DSBDMS), as external electron donors for Ziegler-Natta catalysts can provide a catalyst system that may prepare polypropylene films with improved properties and processing. The catalyst systems of the invention provide high activity, high bulk density, moderate hydrogen response, moderate donor response and high polydispersity (MWD). Suitable di-sec-butyldialkoxysilanes have the formula (SBu)2Si(OR″)2, where R″ is independently a straight or branched alkyl group of 1–5 carbon atoms.

REFERENCES:
patent: 4107413 (1978-08-01), Giannini et al.
patent: 4115319 (1978-09-01), Scata et al.
patent: 4218339 (1980-08-01), Zucchini et al.
patent: 4220554 (1980-09-01), Scata et al.
patent: 4294721 (1981-10-01), Cecchin et al.
patent: 4298718 (1981-11-01), Mayr et al.
patent: 4328122 (1982-05-01), Monte et al.
patent: 4395360 (1983-07-01), Albizatti et al.
patent: 4439540 (1984-03-01), Cecchin et al.
patent: 4460701 (1984-07-01), Terano et al.
patent: 4473660 (1984-09-01), Albizzati et al.
patent: 4544717 (1985-10-01), Mayr et al.
patent: 4562173 (1985-12-01), Terano et al.
patent: 4927797 (1990-05-01), Ewen
patent: 4971937 (1990-11-01), Albizzati et al.
patent: 5106807 (1992-04-01), Morini et al.
patent: 5489634 (1996-02-01), Hara et al.
patent: 5891817 (1999-04-01), Shamshoum et al.
patent: 5945366 (1999-08-01), Kataoka et al.
patent: 6133385 (2000-10-01), Shamshoum
patent: 6255247 (2001-07-01), Shamshoum et al.
patent: 6323293 (2001-11-01), Shamshoum et al.
patent: 0 565 173 (1993-10-01), None
patent: 0 565 173 (1993-10-01), None
A. Proto, et al., “Isotactic-Specific Polymerization of Propene with Supported Catalysts in the Presence of Different Modifiers,” Macromolecules, 1990, pp. 2904-2907, 23:11.
NERAC Abstract of EP 576,413 A1, Dec. 29, 1993.
NERAC Abstract of EP 658577 B1, Jul. 16, 1997.

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