1
John Patrick Lemmon, Patrick Joseph McCloskey, Oltea Puica Siclovan: Melt polycarbonate catalyst systems. General Electric Company, Ben P Patel, Noreen C Johnson, November 27, 2001: US06323304 (70 worldwide citation)

This invention provides a method for preparing polycarbonates, which utilizes polycondensation catalysts of the formula A


2
Norberto Silvi, Patrick Joseph McCloskey, James Day, Mark Howard Giammattei: Extrusion method for making polycarbonate. General Electric Company, Andrew J Caruso, Noreen C Johnson, January 14, 2003: US06506871 (45 worldwide citation)

Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis(methyl salicyl) carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutylphosphonium acetate (TBPA) affords polycarbonate having a weight average molecular weight of ...


3
Timothy Edward Banach, Gary Charles Davis, Paul Michael Smigelski Jr, Patrick Joseph McCloskey: Method for making siloxane copolycarbonates. General Electric Company, Bernadette M Bennett, Donald S Ingraham, June 26, 2001: US06252013 (39 worldwide citation)

A melt condensation polymerization process for preparing siloxane copolycarbonates is provided. The process includes reacting an aromatic dihydroxy compound, carbonic acid diester, hydroxyaryl terminated polydiorganosiloxane and catalyst with a salt.


4
Patrick Joseph McCloskey, James Day, Paul Michael Smigelski, John Lester Maxam, John Aibangbee Osaheni: Extrusion method for making polycarbonate. General Electric Company, Andrew J Caruso, Noreen C Johnson, July 16, 2002: US06420512 (38 worldwide citation)

Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis-methyl salicyl carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutyl phosphonium acetate (TBPA) affords polycarbonate having a weight average molecular weight of ...


5
Patrick Joseph McCloskey, James Day, Paul Michael Smigelski Jr, Timothy Brydon Burnell: Method of polycarbonate preparation by solid state polymerization. General Electric Company, Andrew C Caruso, Noreen C Johnson, February 11, 2003: US06518391 (37 worldwide citation)

Solid state polymerization of partially crystalline polycarbonate oligomers bearing ester-substituted terminal groups occurs at useful reaction rates despite their high level of endcapping. Partially crystalline polycarbonate oligomers having ester substituted terminal groups may be obtained in a si ...


6
Daniel Joseph Brunelle, Patrick Joseph McCloskey, Paul Michael Smigelski Jr, Timothy Brydon Burnell, Ganesh Kailasam: Method of polycarbonate preparation. General Electric Company, Andrew J Caruso, Noreen C Johnson, April 15, 2003: US06548623 (36 worldwide citation)

Polycarbonates containing low or undetectable levels of Fries rearrangement product may be prepared by the melt reaction of a dihydroxy aromatic compound such as bisphenol A with an ester-substituted diaryl carbonate such as the diaryl carbonate of methyl salicylate, bis-methyl salicyl carbonate. Lo ...


7
Patrick Joseph McCloskey, Paul Michael Smigelski Jr, Timothy Brydon Burnell, Juan Rodriques Ordonez, Ignacia Vic Fernandez, Gerardo Hidalgo Llinas, Rudy Francois Alain J Peemans, Edward Venama: Optimization of polycarbonate preparation by transesterification. General Electric Company, Andrew J Caruso, Noreen C Johnson, June 11, 2002: US06403754 (29 worldwide citation)

Acidic impurities in dihydroxyaromatic compounds such as bisphenol A, as illustrated by sulfonic acids and mercaptocarboxylic acids, can have an adverse effect on the molecular weight of a polycarbonate prepared therefrom by transesterification. The same is true of acidic impurities in diaryl carbon ...


8
Patrick Joseph McCloskey, Paul Michael Smigelski: Method of preparing polyestercarbonates. General Electric Company, Andrew J Caruso, Noreen C Johnson, July 29, 2003: US06600004 (29 worldwide citation)

A method of preparing polyestercarbonates is presented in which a mixture of at least one activated diaryl carbonate is reacted under melt polymerization conditions with at least one aromatic dihydroxy compound together with at least one dicarboxylic acid. Polyestercarbonates possessing up to about ...


9
Patrick Joseph McCloskey, Alberto Nisoli, Warren William Reilly: Preparation of polycarbonate having a predetermined molecular weight and level of endcapping. General Electric Company, Andrew J Caruso, Noreen C Johnson, June 4, 2002: US06399739 (28 worldwide citation)

A melt method of preparing polycarbonate having a predetermined number average molecular weight and percent endcapping is described. A computerized process model is used to determine the reaction parameters to be employed in order to furnish the product polycarbonate possessing the desired M


10
Timothy Brydon Burnell, Patrick Joseph McCloskey, Ganesh Kailasam, James Anthony Cella: Solventless preparation of ester-substituted diaryl carbonates. General Electric Company, Andrew J Caruso, Noreen C Johnson, October 22, 2002: US06469192 (28 worldwide citation)

High yields of ester-substituted diary carbonates such as bis-methyl salicyl carbonate were obtained by the condensation of ester-substituted phenols with phosgene in the presence of a phase transfer catalyst (PTC) and optionally a tertiary amine catalyst in a solvent free reaction system comprising ...