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:
Nov. 24, 2009
Filed:
Jun. 28, 2007
Applicants:
Jae-suk Lee, Gwangju, KR;
Hee-soo Yoo, Gwangju, KR;
Shahinur Rahman, Gwangju, KR;
Inventors:
Assignee:
Gwangju Institute of Science and Technology, Gwangju, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08G 18/22 (2006.01); C07C 65/32 (2006.01);
U.S. Cl.
CPC ...
Abstract
Disclosed herein is a metal enolate initiator for polymerizing isocyanates and a method for polymerizing isocyanates by anionic polymerization using the same, in which the initiator forms a cluster upon the initiation and protects stability of terminal anions at the end of the chain to cause controlled polymerization, thus preventing depolymerizaton and improving reaction time and efficiency without the use of a separate additive.