Daniel F Sanders

US Patent:

61600792, Dec 12, 2000

Filed:

Apr 14, 1999

Appl. No.:

9/291466

Inventors:

Hatsuo Ishida - Shaker Heights OH
Daniel Sanders - Rochester MN

Assignee:

Edison Polymer Innovation Corporation - Akron OH

International Classification:

C08G 1406
C08G 804

US Classification:

528129

Abstract:

Arylamines with electron donating groups such as alkyl and alkoxy groups in the meta position on the aromatic ring change the polymerization temperature of the benzoxazine prepared therefrom and offer an opportunity for an additional crosslinking site (the para position on the aromatic amine can couple to a Mannich base generated by the opening of the oxazine ring of the benzoxazine or a methylene bridge generated by a degradation reaction). Naphthenic amines with an alkyl or alkoxy substituent on the 5. sup. th through the 8. sup. th carbon atom on the naphthalene ring can function similarly. The polymers for benzoxazines prepared from at least 10% substituted aromatic or naphthenic amines are useful due to low polymerization temperatures and higher Tg (glass transition temperature).