Ethylene interpolymerizations

Details Ethylene interpolymerizations Ethylene interpolymerizations

1997-11-24

1999-02-09

Tsang, Cecilia J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

C08L 2308

Patent

active

058695753

ABSTRACT:
Processes for polymerizing ethylene/.alpha.-olefin interpolymer compositions are disclosed. The interpolymer compositions have a controlled composition and a controlled molecular weight distribution. The processes utilize a highly-efficient homogeneous catalyst composition in at least one reactor to produce a first interpolymer having a narrow composition distribution and a narrow molecular weight distribution, and a highly-efficient heterogeneous Ziegler catalyst in at least one other reactor. The reactors can be operated sequentially or separately, depending upon the desired product. The novel compositions have good optical properties (e.g., clarity and haze) and good physical properties (e.g., modulus, yield strength, toughness and tear). Useful products which can be formed from these compositions include film, molded articles and fiber.

REFERENCES:
patent: 3014702 (1961-12-01), Oldershaw et al.
patent: 3239197 (1966-03-01), Tollar
patent: 3645992 (1972-02-01), Elsten
patent: 3914342 (1975-10-01), Mitchell
patent: 4205021 (1980-05-01), Morita et al.
patent: 4314912 (1982-02-01), Lowery, Jr. et al.
patent: 4320088 (1982-03-01), Nicco
patent: 4330646 (1982-05-01), Sakurai et al.
patent: 4405774 (1983-09-01), Miwa et al.
patent: 4421162 (1983-12-01), Tollar
patent: 4510303 (1985-04-01), Oda et al.
patent: 4530914 (1985-07-01), Ewen et al.
patent: 4544762 (1985-10-01), Kaminsky et al.
patent: 4547475 (1985-10-01), Glass et al.
patent: 4564063 (1986-01-01), Tollar
patent: 4612300 (1986-09-01), Coleman, III
patent: 4659685 (1987-04-01), Coleman, III et al.
patent: 4668752 (1987-05-01), Tominari et al.
patent: 4701432 (1987-10-01), Welborn, Jr.
patent: 4804714 (1989-02-01), Olivo et al.
patent: 4808262 (1989-02-01), Aneja et al.
patent: 4843129 (1989-06-01), Spenadel et al.
patent: 4935474 (1990-06-01), Ewen et al.
patent: 4937299 (1990-06-01), Ewen et al.
patent: 4960878 (1990-10-01), Crapo et al.
patent: 4981760 (1991-01-01), Naito et al.
patent: 4987212 (1991-01-01), Morterol et al.
patent: 5008204 (1991-04-01), Stehling et al.
patent: 5015749 (1991-05-01), Schmidt et al.
patent: 5026798 (1991-06-01), Canich
patent: 5041583 (1991-08-01), Sangkoya
patent: 5041584 (1991-08-01), Crapo et al.
patent: 5041585 (1991-08-01), Deavenport et al.
patent: 5055438 (1991-10-01), Canich
patent: 5057475 (1991-10-01), Canich et al.
patent: 5064802 (1991-11-01), Steves et al.
patent: 5066738 (1991-11-01), Ewen
patent: 5077255 (1991-12-01), Welborn, Jr.
patent: 5079205 (1992-01-01), Canich
patent: 5084134 (1992-01-01), Mattiussi et al.
patent: 5084534 (1992-01-01), Welborn, Jr. et al.
patent: 5084540 (1992-01-01), Albizzati et al.
patent: 5086024 (1992-02-01), Crapo et al.
patent: 5096867 (1992-03-01), Canich
patent: 5376439 (1994-12-01), Hodgson et al.
patent: 5395810 (1995-03-01), Shamshoum et al.
patent: 5519091 (1996-05-01), Tsutsui et al.
patent: 5530065 (1996-06-01), Farley et al.
L. Wild, T. R. Ryle, D. C. Knobeloch, and I. R. Peat; "Determination of Branching Distributions in Polyethylene and Ethylene Copolymers"; Journal of Polymer Science; vol. 20, pp. 441-455 (1982).
K. K. Kohrer, L. G. Hazlitt and N. F. Whiteman; "Short Chain Branching Distribution of ULDPE"; Journal of Plastic Film & Sheeting; vol. 4, pp. 214-226 (1988).
SPO '92 "Future Trends in Polyolefins Technology" by Douglas M. Selman, pp. 11-16 (Sep. 23, 1992).
"Selected Applications For Constrained Geometry Catalyst Technology (CGCT) Polymers" by G. D. Schwank, presented and distributed at SPO '92 sponsered by Schotland Business Research, Inc., (Sep. 23, 1992).
SPO '92 Proceedings, "The Material Properties of Polymers Made From Constrained Geometry Catalysts" by Kurt W. Swogger, pp. 155-165 (1992).
"A New Family of Linear Ethylene Polymers Provides Enhanced Sealing Performance" by G.F. Van der Sanden and Richard W. Halle, (Feb./1992), Tappi Journal, pp. 99-103.
Society of Plastics Engineers Polyolefins VII International Conference Proceedings, "Structure Property Relationships in EXXPOL TM Polymers" by C.S. Speed, B. C. Trudell, A. K. Mehta and F. C. Stehling, pp. 45-66, (Feb. 24-27, 1991).
"The Marketing Challenge Created By Single Site Catalysts in Polyolefins" by Michael P. Jeffries, 1991 Speciality Polyolefins Conference (SPO '91), pp. 43-55 (Sep. 24, 1991).

Affiliated with

Also associated with

Rating

Ethylene interpolymerizations does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Ethylene interpolymerizations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ethylene interpolymerizations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1949113