Epoxy novolaks stabilised with organic phosphorus compounds

Details Epoxy novolaks stabilised with organic phosphorus compounds Epoxy novolaks stabilised with organic phosphorus compounds

C - Chemistry, Metallurgy

08

L

C08L 61/14 (2006.01) C08K 5/51 (2006.01) C08K 5/527 (2006.01) H05K 1/03 (2006.01)

Patent

CA 2081000

EM/K-18819/A Epoxy novolaks stabilised with organic phosphorus compounds Abstract of the Disclosure Compositions comprising a) an epoxidised novolak, and b) 0.1 to 100 parts by weight, based on 100 parts by weight of component a), of at least one compound of formula I Image (I), wherein X1 is chloro or bromo, X2 is chloro, bromo or hydrogen, and Y is O or S,and R1 and R2 are each independently of the other C1-C4alkyl, and R3 and R4 are a group of formula II Image (II), wherein R1, R2. X1 and X2 are as defined above, which group carries identical or different substituents, or R3 and R4, when taken together, form a group of formula III Image (III), wherein R1 and R2 are as defined above, are excellent flame retardants in epoxy novolak resin systems.

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