Sabic Global Technologies B.v.

Sabic Innovative Plastics IP B.v.

Fernando Olmedo Fernandez

Jorge A Garcia Agudo

Jan Henk Kamps

Ignacio Vic Fernandez

Hans-Peter Brack

Dennis James Patrick Maria Willemse

Hans Looij

Maarten Antoon Jan Campman

Isabel Macian Aviles

Kazutoyo Uno

Uno Kazutoyo

The present invention provides a melt polymerization reactor system and method of producing polycarbonate using a late-addition catalyst formulation having a melt transesterification catalyst dispersed in a liquid carrier system which preferably includes less than 10 wt % water. The formulation also preferably includes a liquid carrier system having phenol and a cosolvent. The melt transesterification catalyst can be present in the formulation in a range of 50 ppm to 60,000 ppm.

Late-addition catalyst formulation, reactor system, and method for producing polycarbonate

A method of making a polycarbonate is described. The method comprises melt reacting an ester-substituted diaryl carbonate and a multifunctional compound of the formula: in the presence of catalyst to form an oligomer comprising less than 2,000 ppm of an ester-linked terminal group, and melt polymerizing the oligomer to form a polycarbonate. Use of specific reaction conditions produces a polycarbonate having an Mw of greater than or equal to 25,000 g/mol as determined by gel-permeation chromatography relative to polystyrene standards. Polycarbonates comprising units derived from the multifunctional compound, including homopolycarbonates, aliphatic copolycarbonates further comprising units derived from an aromatic dihydroxy compound, and aliphatic polycarbonate-polyesters, are also disclosed, as are a thermoplastic composition and an article including the disclosed polycarbonates.

Aliphatic polycarbonates, methods of making, and articles formed therefrom

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Murcia, Spain

Fernando Olmedo Fernandez