Patent ID: 8541516

Claim:
A process for making a curable phosphorus-containing, benzoxazine ring-containing resin composition comprising blending: (1) a benzoxazine ring-containing compound comprising the reaction product of: (I) a phosphorus-containing compound comprising the reaction product of: (A) at least one organophosphorus compound having a group selected from the group H—P═O, the group P—H, and the group P—OH; and (B) at least one compound having the following Formula (V): wherein R1 each independently is hydrogen or an alkyl group having from 1 to 10 carbon atoms; Y is a functional group selected from hydroxy, or amine; X is a hydrocarbylene group; R″ is a hydrocarbyl group having from 1 to 8 carbon atoms; p each independently represents a number from 1 to 4; and a and b each independently represent a number equal to or greater than zero (II) an amine compound when the Y functional group of Component (B) is hydroxyl, or a hydroxyl group-containing compound with the Y functional group is an amine; and (III) an aldehyde compound; and (2) a thermosetting composition.