Patent ID: 6797821
Filing Date: 2004-09-28
Classification: C08G,H05K

Abstract:
A phosphorus-containing flame-retardant hardener having a formula selecting from the group consisting of (A) to (I): whereinI and m independently are 0, 1 or 2, and I+m>0; i and j independently are 0, 1 or 2, and 0Z is â€”NH2, â€”CH3 or phenyl; â€ƒwherein R1, R2 independently are H, C1ËœC18 alkyl, C6ËœC18 aryl, C6ËœC18 substituted aryl, C6ËœC18 aryl methylene, or C6ËœC18 substituted aryl methylene; wherein R is C1-C4 alkyl or C6-C18 aryl; and n is an integer of 0 to 5, wherein when said hardener has the formula (C): wherein when said hardener has the formula of (G):