Abbott Laboratories Corporation

Kraton Polymers U.S. LLC

Kraton Polymers LLC

David K Schisla

Carl Lesley Willis

Kimberly Ann Johnson

Daniel Earl Goodwin

Wouter De Jong

Lou-Hwa J Sheu

Marcela De Leon Gatti

Christopher A Tomas

Yingqing Huang

A method for separating a biological conjugate from an aggregate. The molecular weight of the biological conjugate ranges from about 10 kDa to about 1000 kDa. In one embodiment, the method comprises the steps of:

Purification of biological conjugates by size exclusion chromatography

Disclosed is a method for making selectively hydrogenated block copolymers of vinyl aromatic hydrocarbons and conjugated dienes comprising: a) anionically polymerizing vinyl aromatic hydrocarbons and conjugated dienes to produce block copolymers with living chain ends; b) terminating the living chain ends; to produce a terminated block copolymer, with a member from the group consisting of an alcohol, hydrogen, and mixtures thereof, to prepare a terminated block copolymer; and c) contacting the terminated block copolymers with hydrogen at a temperature of from 20 to 175&#xb0; C. in the presence of a catalyst prepared by combining a cobalt carboxylate with an aluminum alkyl, wherein: (i) if the polymer is terminated with an alcohol and the alcohol is a linear alcohol, the linear alcohol is used to terminate the living chain ends in an amount such that the alcohol:living chain end molar ratio is from 0.05 to 1.2: (ii) if the polymer is terminated with an alcohol and the alcohol is a branched alcohol, the branched alcohol is used to terminate the living chain ends in an amount such that the alcohol:living chain end molar ration is from 0.05 to about 3.0: an (iii) if the polymer is terminated with an alcohol and the alcohol is a mixture of a linear alcohol and a branched alcohol, the linear alcohol is used to terminate the living chain ends in an amount such that the linear alcohol:living chain end molar ration is from 0.05 to 1.2.

Method for making selectively hydrogenated block copolymers of vinyl aromatic hydrocarbons and conjugated dienes

Disclosed is a process for preparing polymers and copolymer blocks of conjugated dienes with high amounts of branching, commonly referred to as vinyl content, comprising the use of at least two microstructure control agents. One of the microstructure control agents can be a bulk microstructure control agents such as diethyl ether. The other microstructure control agent is a specific microstructure control agent such as 1,2-diethoxypropane. The use of a bulk and a specific microstructure control agent together can allow for the production of high levels of vinyl content at high polymerization rates without the undesirable affects experienced with either one alone.

Conjugated diene polymers and copolymer blocks having high vinyl content prepared using mixed microstructure control agents and process for preparing same

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Pleasant Prairie, WI, United States of America

David K Schisla