1
Charles Cozewith, Shiaw Ju, Gary W VerStrate: Narrow MWD alpha-olefin copolymers. Exxon Research & Engineering Co, S H Markowitz, September 10, 1985: US04540753 (177 worldwide citation)

The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.


2
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Molecular weight distribution modification in tubular reactor. Exxon Research & Engineering Co, December 6, 1988: US04789714 (51 worldwide citation)

A method for preparing a polymodal MWD ethylene-alpha olefin copolymer using at least two catalysts to initiate growth of polymer chains that attain different average molecular weights. The polymodal MWD ethylene copolymer comprises at least two different molecular weight modes each mode having a na ...


3
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Molecular weight distribution modification in a tubular reactor. Exxon Research & Engineering Co, S H Markowitz, W G Muller, November 22, 1988: US04786697 (43 worldwide citation)

Polymodal MWD ethylene copolymer comprising at least two modes of differing molecular weights. Each mode has at least one of M.sub.w /M.sub.n of less than 2.0, and a M.sub.z /M.sub.w of less than 1.8. The polymodal character of the copolymer is achieved by either (1) withdrawing polymer modes from t ...


4
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Narrow MWD alpha-olefin copolymers. Exxon Research & Engineering Co, S H Markowitz, W G Muller, December 20, 1988: US04792595 (39 worldwide citation)

The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.


5
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Nodular copolymers formed of alpha-olefin copolymers coupled by non-conjugated dienes. Exxon Research & Engineering Company, S H Markowitz, J B Murray Jr, W G Muller, November 21, 1989: US04882406 (36 worldwide citation)

Nodular copolymer and method of preparing a nodular copolymer by preparing a copolymer chain and coupling it with a coupling agent. The copolymers which form the nodular copolymer are formed of first and second segments, of which the second segments, containing the coupling agent, react to form the ...


6
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Narrow MWD alpha-olefin copolymers. Exxon Research and Engineering Co, W G Muller, September 25, 1990: US04959436 (33 worldwide citation)

The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.


7
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Copolymer compositions containing a narrow MWD component and process of making same. Exxon Research and Engineering Company, Steven H Markowitz, William G Muller, October 17, 1989: US04874820 (31 worldwide citation)

The present invention relates to polymeric composition of a first copolymer which includes at least one copolymer having at least one of Mw/Mn less than 2 and Mz/Mw less than 1.8; and a second copolymer having Mw/Mn greater than or equal to 2. The composition can be produced by preparing the first a ...


8
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Nodular copolymers comprising narrow MWD alpha-olefin copolymers coupled by non-conjugated dienes. Exxon Research & Engineering Co, S H Markowitz, J B Murray Jr, December 29, 1987: US04716207 (24 worldwide citation)

A method of preparing a nodular polymer by preparing a copolymer chain and coupling it to a coupling agent. The coupling agent is a non-conjugated diene. Preferably the non-conjugated diene has both double bonds Ziegler catalyst polymerizable. The preferred product comprises a norbornadiene coupled ...


9
Charles Cozewith, Shiaw Ju, Gary W Verstrate: Molecular weight distribution modification in a tubular reactor. May 7, 1991: US05013801 (13 worldwide citation)

Polymer having a polymodal MWD ethylene copolymer are prepared by conducting the polymerization in a substantially mix free reactor using an essentially transfer agent free reaction mixture, the reaction being carried out in a manner such that the propagation of essentially all copolymer chains is i ...


10
Charles Cozewith, Shiaw Ju, Gary W Verstrate: End-capped polymer chains, star and graft copolymers, and process of making same. Exxon Research & Engineering Company, W G Muller, July 9, 1991: US05030695 (11 worldwide citation)

Ziegler-Natta catalyzed polymer chains are end capped with at least one functional group-containing unit which is otherwise essentially absent from said polymer chain. The chains can be grafted to form graft copolymers and star copolymers. The compositions are useful as oil additives and in general ...