Patent ID: 7915436

Claim:
A curable composition comprising: a thermosetting resin; a non-halogenated flame retardant selected from the group consisting of organoborates, organophosphates, organophosphites, and organophosphinates; and a phosphorus-containing silsesquioxane represented by the formula [R 1 3 SiO 1/2 ] m [R 2 SiO 3/2 ] n [R 3 SiO 3/2 ] p [(R 4 O) 2 PO(CH 2 ) x SiO 3/2 ] q wherein each of R 1 , R 2 , R 3 , and R 4 independently represents a hydrocarbyl group; x represents an integer of from 1 to 8; m is a positive number less than 1.5; n and q are positive numbers greater than 0 and less than 1; and p is a number greater than or equal to 0 and less than 1, wherein (n+p)/q is in a range of from 0.5 to 99, and further wherein (n+p+q)=1.