The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 30, 2006
Filed:
Dec. 15, 2004
Piet L. W. Christiaens, Heverlee, BE;
Ronald James Hoxmeier, Houston, TX (US);
Piet L. W. Christiaens, Heverlee, BE;
Ronald James Hoxmeier, Houston, TX (US);
KRATON Polymers U.S. LLC, Houston, TX (US);
Abstract
Disclosed is a process for hydrogenating a block copolymer comprising admixing a block copolymer cement with hydrogen in the presence of a heterogeneous hydrogenation catalyst wherein the heterogeneous hydrogenation catalyst is a metal catalyst on a porous alumina support, the porous alumina support having the properties: (a) from about 40 to about 60 percent of the pore volume of the support have a diameter greater than 1000 nm; (b) from about 50 to about 70 percent of the pore volume of the support have a diameter greater than 100 nm; and (c) the support has a multi-modal pore structure with from about 5 to about 20 percent of the total pore volume of the porous alumina support being within a pore mode having a diameter in the range of from about 3000 nm to about 5000 nm. It is also disclosed that alumina can be used to remove a polymerization catalyst, such as Lithium, from a block copolymer cement.