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:
Jan. 29, 2019
Filed:
Mar. 16, 2018
Applicant:
Cytec Industries Inc., Princeton, NJ (US);
Inventors:
Longgui Tang, Greenville, SC (US);
Alan D. Thomas, Mauldin, SC (US);
Billy D. Harmon, Simpsonville, SC (US);
Assignee:
CYTEC INDUSTRIES INC., Princeton, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08F 2/06 (2006.01); C08L 33/20 (2006.01); B29C 47/00 (2006.01); C08F 120/44 (2006.01); C08F 2/38 (2006.01); C08F 220/44 (2006.01); C08F 6/00 (2006.01); D01F 9/22 (2006.01); B29D 99/00 (2010.01); B29K 55/00 (2006.01); B29L 31/00 (2006.01); D01D 5/06 (2006.01);
U.S. Cl.
CPC ...
C08L 33/20 (2013.01); B29C 47/0004 (2013.01); C08F 2/06 (2013.01); C08F 2/38 (2013.01); C08F 6/003 (2013.01); C08F 120/44 (2013.01); C08F 220/44 (2013.01); D01F 9/22 (2013.01); B29D 99/0078 (2013.01); B29K 2055/00 (2013.01); B29L 2031/731 (2013.01); C08F 2438/03 (2013.01); D01D 5/06 (2013.01);
Abstract
A method for synthesizing polyacrylonitrile (PAN) polymer with a narrow molecular weight distribution is disclosed. The preferred PAN polymer has a PDI (Mw/Mn) of about 2 or less. Such PAN polymer is synthesized by controlled/living radical polymerization using a special RAFT (Reversible Addition-Fragmentation Chain Transfer) agent. Also disclosed is a method for producing carbon fibers from PAN polymer with low PDI.