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:
Oct. 09, 2007
Filed:
Apr. 22, 2005
James Harwood, Stow, OH (US);
James Oziomek, Cuyanoga Falls, OH (US);
David F. Lawson, Uniontown, OH (US);
James E. Hall, Mogadore, OH (US);
James Harwood, Stow, OH (US);
James Oziomek, Cuyanoga Falls, OH (US);
David F. Lawson, Uniontown, OH (US);
James E. Hall, Mogadore, OH (US);
Bridgestone Corporation, Chuo-ku, Tokyo, JP;
Abstract
Provided is a method of converting an anionic living end to a protected free radical 'living' end in a well-controlled manner, which enables copolymerization by plural mechanisms. The method is particularly useful for copolymerization of anionically polymerizable monomers and free radical polymerizable monomers, and therefore useful for production of PB-g-PS, HIPS, ABS, and MBS etc. Also provided is a reversibly coupled polymer, which, when decoupled, generates 'living' free radical for further copolymer chain reaction.