Preparation of (phosphonyl) aromatic diesters and acids
View Patent ↗The composition of a (phosphonyl) aromatic compound represented by is provided. In this composition, R 1 (a) and R 1 (b) are each independently H, C n H 2n+1 , phenyl or benzyl; R 2 (a) and R 2 (b) are each independently H, C n H 2n+1 , phenyl or benzyl with the proviso that no more than one R 2(a) and no more than one R 2(b) can be phenyl or benzyl; R 3 (a) and R 3 (b) are each independently C n H 2n+1 , phenyl or benzyl; and, n is an integer of 1-10; and p is an integer of 1-10. The disclosed composition can find utility in improving flame retardancy of polyesters, aramids and nylons.
1. A composition comprising a (phosphonyl) aromatic compound represented by the structure (I)
Wherein,
R 1 (a) and R 1 (b) are each independently H, C n H 2n+1 , phenyl or benzyl;
R 2 (a) and R 2 (b) are each independently H, C n H 2n+1 , phenyl or benzyl with the proviso that no more than one R 2(a) and no more than one R 2(b) can be phenyl or benzyl;
R 3 (a) and R 3 (b) are each independently C n H 2n+1 , phenyl or benzyl;
n is an integer of 1-10;
and,
p is an integer of 1-10.
2. The composition of claim 1 wherein R 1 (a) and R 1 (b) are the same.
3. The composition of claim 1 wherein R 2 (a) and R 2 (b) are the same.
4. The composition of claim 1 wherein R 3 (a) and R 3 (b) are the same.