Sabic Innovative Plastics IP B.v.

General Electric Company

Sabic Global Technologies B.v.

Alexey Kruglov

Edward Norman Peters

Hua Guo

Alvaro Carrillo

Erik René Delsman

Sheldon J Shafer

Gaylord M Kissinger

Hugo Gerard Eduard Ingelbrecht

Emil Markov Georgiev

Gert-Jan Schoenmakers

Eduard Hendricus Schlarmann

Karl Aaron Baro

Darlene Hope Nance

Chuks O Mbeledogu

Rudy Francois Alain Joseph Peemans

A poly(arylene ether) copolymer is the product of oxidative copolymerization of monomers including a monohydric phenol and a dihydric phenol. It has an intrinsic viscosity of about 0.04 to about 0.15 deciliter per gram and, on average, about 1.8 to about 2 hydroxyl groups per molecule. The poly(arylene ether) copolymer is enriched in low molecular weight copolymer chains and copolymer chains that include a terminal unit derived from the dihydric phenol.

Poly(arylene ether) copolymer

Capped poly(arylene ether)s are prepared by a method that includes reacting a poly(arylene ether) with a capping agent to form a capping reaction mixture, washing the capping reaction mixture with a concentrated basic aqueous solution, and isolating the capped poly(arylene ether) by a total isolation method. The washing method is effective for removal of capping-related impurities, and surprisingly does not result in decomposition of the capped poly(arylene ether).

Poly(arylene ether) preparation method

A method for preparing a poly(arylene ether) with a reduced level of powder fines is described. In one embodiment, the method comprises oxidatively coupling a monohydric phenol in the presence of a solvent and a complex metal catalyst, to produce a poly(arylene ether) resin; and then removing a portion of the solvent to produce a concentrated solution having a cloud point T. The concentrated solution is then combined with an anti-solvent to precipitate the poly(arylene ether) in the form of a precipitation mixture. The concentrated solution usually has a temperature of at least about (T&#x2212;10&#xb0; C.) immediately before it is combined with the anti-solvent. The precipitation mixture has a temperature of at least about (T&#x2212;40&#xb0; C.) after its formation. Related poly(arylene ether) copolymers are also described.

Method for the preparation of a poly(arylene ether), and related compositions

A method for regenerating deactivated sulfonated cation exchange catalysts comprises washing the deactivated catalyst with phenol-water mixtures comprising about 5-20 wt. % of water in phenol at a temperature of about 70-95&deg; C.

Regeneration of catalysts used in the manufacture of bisphenols

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Glenmont, NY, United States of America

Alexey Kruglov