Catalysts and cocatalysts for the preparation of polyolefins

Details Catalysts and cocatalysts for the preparation of polyolefins Catalysts and cocatalysts for the preparation of polyolefins

1995-06-07

1997-08-26

Smith, Edward J.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Plural component system comprising a - group i to iv metal...

502117, 556 43, 556 52, 556 53, C08F 4622, C07F 900, C07F 1700

Patent

active

056610963

ABSTRACT:
In the case of Ziegler catalysts based on a metallocene as the transition metal component and an aluminoxane as the activator, preactivation of the metallocene with the aluminoxane results in a considerable increase in the activity of the catalyst system. Furthermore, 1-olefin polymers of a high degree of isotacticity and having compact, spherical particles, a very narrow particle size distribution and a high bulk density are obtained by means of a catalyst system of this type.

REFERENCES:
patent: 4522982 (1985-06-01), Ewen
patent: 4536484 (1985-08-01), Lacombe et al.
patent: 4542199 (1985-09-01), Kaminsky et al.
patent: 4701432 (1987-10-01), Welborn, Jr.
patent: 4769510 (1988-09-01), Kaminsky et al.
patent: 4794096 (1988-12-01), Ewen
patent: 4808561 (1989-02-01), Welborn, Jr.
patent: 4849487 (1989-07-01), Kaminsky et al.
patent: 4897455 (1990-01-01), Welborn, Jr.
patent: 4933403 (1990-06-01), Kaminsky et al.
patent: 4937299 (1990-06-01), Ewen et al.
patent: 5017714 (1991-05-01), Welborn, Jr.
patent: 5084534 (1992-01-01), Welborn, Jr. et al.
patent: 5103030 (1992-04-01), Rohrmann et al.
patent: 5120867 (1992-06-01), Welborn, Jr.
patent: 5314973 (1994-05-01), Welborn, Jr.
Grant & Hackh's Chemical Dictionary (3d. Ed), p. 192.
Moore, Physical Chemistry, Prentice-Hall, NJ (1955) p. 116.
Ewen et al, "Crystal Structures and Stereospecific Propylene Polymerization with Chiral Hafnium Metallocene Catalysts", J. Am. Chem. Soc. 109, pp. 6544-6545 (1987).
Kaminsky et al., "Transition Metals and Organometallics as Catalysts for Olefin Polymerization", Proceedings of an International Symposium, Hamburg, Sep. 21, 1987-Sep. 24, 1987, pp. 281-289 (1988).
Kaminsky et al., "Olefinpolymerization with Highly Active Soluble Zirconium Compounds Using Aluminoxane as Cocatalyst", Makromol, Chem., Macromol. Symp. 3, pp. 377-387 (1986).
Schwemlein et al, Journal of Organometallic Chemistry, 254 (1983) 69-73.

Affiliated with

Also associated with

Rating

Catalysts and cocatalysts for the preparation of polyolefins does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Catalysts and cocatalysts for the preparation of polyolefins, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Catalysts and cocatalysts for the preparation of polyolefins will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1988365