General Electric Company

Equistar Chemicals, LP

Occidental Chemical Corporation

Lyondell Petrochemical Company

Other

Gm Global Technolgoy Operations, Inc.

John A Tyrell

Russell J McCready

Sandor M Nagy

Ramesh Krishnamurti

Bradley P Etherton

Gary L Freimiller

Leonard V Cribbs

Niles R Rosenquist

Donald B Jaquiss

Mary K Cocoman

Warren J Peascoe

S Jack Willey

Victor Mark

Sheldon J Shafer

Omar M Boutni

Robert J Axelrod

Gary F Smith

Jin-O Choi

Stephen M Cooper

Sergio R Rojstaczer

Thomas A Morelli

Stefan F Rasch

Paul Dean Sybert

Sterling B Brown

Ping Y Liu

David Y Tang

Jerold C Rosenfeld

Nan-I Liu

Lawrence R Wallace

Choong Y Han

Dennis J McFay

William Lee Gately

Robert A Florence

Russell J McGready

Michael R McCormick

May T Wong

Paul D Dubell

Transition metal catalysts containing bidentate ligands and method of using and preparing same

Method of polymerizing vinyl chloride monomer

A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10 transition or lanthanide metal, M, and at least one indenoindolyl ligand that is &pgr;-bonded to M. The key ligand is made in two steps from readily available indanones and aryl hydrazines. Reaction of its anion with a source of the metal completes a remarkably simple synthetic route to a new family of single-site olefin polymerization catalysts.

Single-site catalysts for olefin polymerization

Olefin polymerization is performed in the presence of a catalyst comprising a compound of the formula

Olefin polymerization catalysts containing amine derivatives

Disclosed is a polyimidesiloxane adhesive made by reacting in a solution of an organic solvent a dianhydride selected from the group consisting of biphenyl dianhydride and oxydiphthalic anhydride with an approximately stoichiometric amount of a diamine. The diamine is a mixture of about 5 to about 30 mole % of a siloxane-containing diamine and about 70 to about 95 mole % of a non-siloxane containing diamine. The non-siloxane containing diamine is a mixture of about 10 to about 90 mole % each of at least two of the diamines 2,2-bis(4&lsqb;4-aminophenoxy&rsqb;phenyl) propane, &agr;,&agr;&prime;-bis(4-aminophenyl)-1,4-diisopropylbenzene, 3,3&prime;-diaminophenylsulfone, and 1,3-bis(3-aminophenoxy)benzene. The adhesive can be made into one, two, and three-layer tapes (or dispensed in other ways) which have a high T,and a relatively low bonding temperature.

Polyimidesiloxane adhesive

A single-site olefin polymerization catalyst is described. The catalyst comprises an activator and an organometallic compound that includes an amine derivative ligand. The catalyst is highly productive, incorporates comonomers well, and gives polymers with narrow molecular weight distributions. The compound is of the formula

Catalysts for the polymerization of olefins contain units of the formula: wherein ##STR1## each R is independently selected from a C.sub.1 to C.sub.10 aliphatic or cycloaliphatic group or a C.sub.6 to C.sub.18 aryl, aralkyl, or alkaryl;

Modified polysiloxane catalysts and a method of using the same

A catalysis system containing an olefin polymerization catalyst having at least one Group 3 to Group 10 transition metal or one of the Lanthanide series of the Periodic Table and an organic support is homogeneous and has particular applicability in the production of polyolefins having narrow molecular weight distribution. The support of the catalysis system is the reaction product of a silicone and a polyamine. The catalysis system has high thermal stability.

Catalyst system containing reaction product of liquid silicone and

A catalyst useful in the polymerization of .alpha.-olefins comprises the reaction product of an alcohol having the general formula ##STR1## with an organometallic compound having the general formula

.alpha.-olefin polymerization catalysts

Disclosed is a catalyst having the formula ##STR1## where each R is independently selected from aliphatic from C.sub.1 to C.sub.6 and aromatic from C.sub.6 to C.sub.10, each R.sub.5 is independently selected from H, R, and L', each L' is independently selected from LM'L.sub.r X.sub.3-r or two L' groups form the bridge --LM'X.sub.2-r L.sub.r --, each L is independently selected from cyclopentadienyl, indenyl, and fluorenyl, X is chlorine or bromine, M' is zirconium, titanium, or hafnium, n is 5 to 500, the ratio of R to H+L in R.sub.5 is 0 to 100, the ratio of H to L' in R.sub.5 is 0 to 4, and r is 0 or 1.

Polysiloxane supported metallocene catalysts

Disclosed is a supported catalyst which is the reaction product of

Supported catalyst

Disclosed is a novel bidentate pyridine transition metal catalyst having the general formula ##STR1## where Y is O, S, NR, ##STR2## each R is independently selected from hydrogen or C.sub.1 to C.sub.6 alkyl, each R' is independently selected from C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, C.sub.6 to C.sub.16 aryl, halogen, or CF.sub.3, M is titanium, zirconium, or hafnium, each X is independently selected from halogen, C.sub.1 to C.sub.6 alkyl, C.sub.1 to C.sub.6 alkoxy, or ##STR3## L is X, cyclopentadienyl, C.sub.1 to C.sub.6 alkyl substituted cyclopentadienyl, indenyl, fluorenyl, or ##STR4## and 'n' is 1 to 4. Also disclosed is a method of making a poly-.alpha.-olefin comprising polymerizing an .alpha.-olefin monomer using that catalyst or a catalyst that has the general formula ##STR5## where Y, M, L, X, and R' were previously defined.

Polymerization of .alpha.-olefins with transition metal catalysts based

Disclosed is a method of forming a polyimide coating in a pattern on a surface. A first solution is prepared of an organic solvent, and diamine and dianhydride monomers. The monomers are polymerized to form a polyamic acid that is soluble in the organic solvent. About 10 to about 95% of the amic acid groups in the polyamic acid are imidized, forming a partially imidized polyamic acid. A more concentrated solution of the partially imidized polyamic acid is prepared and about 0.1 to about 10 wt % of a thixotrope is mixed with the more concentrated solution to form a paste. A template is placed over the surface and the paste is forced through the template onto the surface. The solvent is evaporated and the partially imidized polyamic acid on the surface is fully imidized.

Forming polyimide coating by screen printing

Growing community of inventors

Mt. Vernon, IN, United States of America

John A Tyrell