Exxon Chemical Patents, Inc.

Exxonmobil Chemical Patents Inc.

Exxon Research and Engineering Company

Exxonmobile Research and Engineering Company

Exxon Chemical Products Inc.

Lewis J Fetters

Mark J Struglinski

David John Lohse

Cesar Alberto Garcia-Franco

Scott Thomas Milner

Nikos Hadjichristidis

Robert A Mendelson

David W Mead

Gary William VerStrate

Dennis G Peiffer

Hsien-Chang Wang

Pamela Jean Wright

Joseph Anthony Sissano

Gary W Ver Strate

Rebecca L Rucker

Louise M Wheeler

Kenneth Lewtas

Edward N Kresge

Robert Dryden Tack

Dhanesh Gordon Goberdhan

Andrew Matthew McAleer

John Huang

Hydrogenated block copolymers are used as a component in a cold flow additive composition.

Fuel oil additives and compositions

The invention is directed to essentially saturated hydrocarbon polymer composition comprising essentially saturated hydrocarbon polymers having A) a backbone chain; B) a plurality of essentially hydrocarbyl sidechains connected to A), said sidechains each having a number-average molecular weight of from 2500 Daltons to 125,000 Daltons and a MWD by SEC of 1.0-3.5; and having A) a Newtonian limiting viscosity (&eegr; ) at 190&deg; C. at least 50% greater than that of a linear olefinic polymer of the same chemical composition and weight average molecular weight, preferably at least twice as great as that of said linear polymer, B) a ratio of the rubbery plateau modulus at 190&deg; C. to that of a linear polymer of the same chemical composition less than 0.5, preferably <0.3, C) a ratio of the Newtonian limiting viscosity (&eegr; ) to the absolute value of the complex viscosity in oscillatory shear (&eegr;*)at 100 rad/sec at 190&deg; C. of at least 5, and D) a ratio of the extensional viscosity measured at a strain rate of 1 sec , 190&deg; C., and time&equals;3 sec (i.e., a strain of 3) to that predicted by linear viscoelasticity at the same temperature and time of 2 or greater. Ethylene-butene prepared by anionic polymerization and hydrogenation illustrate and ethylene-hexene copolymers prepared by coordination polymerization illustrate the invention. The invention polymers exhibit improved processing characteristics in that the shear thinning behavior closely approaches that of ideal polymers and exhibit improved strain thickening.

Processing olefin copolymers

The invention is directed to essentially saturated hydrocarbon polymer composition comprising essentially saturated hydrocarbon polymers having A) a backbone chain, B) a plurality of essentially hydrocarbyl sidechains connected to A), said sidechains each having a number-average molecular weight of from 2500 Daltons to 125,000 Daltons and a MWD by SEC of 1.0-3.5; and having A) a Newtonian limiting viscosity (&eegr; ) at 190&deg; C. at least 50% greater than that of a linear olefinic polymer of the same chemical composition and weight average molecular weight, preferably at least twice as great as that of said linear polymer, B) a ratio of the rubbery plateau modulus at 190&deg; C. to that of a linear polymer of the same chemical composition less than 0.5, preferably <0.3, C) a ratio of the Newtonian limiting viscosity (&eegr; ) to the absolute value of the complex viscosity in oscillatory shear (&eegr;*)at 100 rad/sec at 190&deg; C. of at least 5, and D) a ratio of the extensional viscosity measured at a strain rate of 1 sec , 190&deg; C., and time&equals;3 sec (i.e., a strain of 3) to that predicted by linear viscoelasticity at the same temperature and time of 2 or greater. Ethylene-butene prepared by anionic polymerization and hydrogenation illustrate and ethylene-hexene copolymers prepared by coordination polymerization illustrate the invention. The invention polymers exhibit improved processing characteristics in that the shear thinning behavior closely approaches that of ideal polymers and exhibit improved strain thickening.

Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated para-methylstyrene units in the chain, e.g., a brominated copolymer of isobutylene and para-methylstyrene, with an anionically polymerized polymer made using an organolithium initiator compound having the formula R R Z R &mdash;Li where R and R are alkyl radicals, R is a direct link or an organic radical and Z is nitrogen or phosphorous. Reaction of the anionically polymerized polymer having an R R Z R &mdash; end group with the halogenated polymer leads to graft polymers coupled by a quaternary ammonium or phosphonium groups.

Graft copolymers containing ionomer units

Graft copolymers having cationic units pendant to the backbone chain are disclosed. These polymers are prepared by reacting a polymer containing halogenated paramethylstyrene units in the chain, e.g., a brominated copolymer of isobutylene and para-methylstyrene, with an anionically polymerized polymer made using an organolithium initiator compound having the formula R.sub.1 R.sub.2 Z R.sub.3 --Li where R.sub.1 and R.sub.2 are alkyl radicals, R.sub.3 is a direct link or an organic radical and Z is nitrogen or phosphorous. Reaction of the anionically polymerized polymer having an R.sub.1 R.sub.2 Z R.sub.3 --end group with the halogenated polymer leads to graft polymers coupled by a quaternary ammonium or phosphonium groups.

The present invention relates to hydrogenated polybutadiene comprising monomeric units of 1,4-butadiene and 1,2-butadiene addition products. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.

Viscosity modifier polybutadiene polymers

The present invention relates to hydrogenated block copolymers of butadiene and at least one other diene, preferably isoprene. The copolymer is hydrogenated and comprises at least 10% by weight of at least one crystallizable segment and at least one low crystallinity segment.

Viscosity modifier polymers

Viscosity modifer polymers

The present invention provides a process for producing high elongation elastomers and highly oriented films and fibers from polymers having specific associative groups, such that the end groups on each macromolecule tend to associate with one another after the macromolecules are in a disentangled state, i.e., in the form of a semi-dilute solution. This association is of a force strong enough to prevent the macromolecular chains from slipping past one another and reentangling when the polymer is moderately heated or further concentrated in solution. The association may be manipulated, i.e., is reversible, under a change in parameter such as temperature, pH, polarity of the solvent medium and like parameters. The associated polymer macromolecules can be drawn as a gel from a semi-dilute solution into a highly aligned disentangled polymer to yield shaped articles.

Disentangled chain telechelic polymers

Growing community of inventors

Annandale, NJ, United States of America

Lewis J Fetters