Flame retardant compound, method of making the same, resin composition and article made therefrom

A compound having a structure represented by the following Formula (I):

• wherein X represents a covalent bond, —C(CH3)2—, —CH(CH3)—, —CH2—, —SO2—, —S—, or —O—;
• Q1 and Q2 individually represent a functional group containing a C═C unsaturated bond;
• and
• J1 and J2 individually represent a flame retardant group containing a phosphorus atom, wherein J1 and J2 individually have the following structure:
• wherein A is oxygen or sulfur;
• n1 is 0 or 1;
• dotted line represents absence of a bond;
• and R1 and R2 individually represent an alkyl group with or without a double bond, an aryl group with or without a double bond, an alkoxy group, an aryloxy group, a sulfur-containing alkyl group, a sulfur-containing aryl group, a silyl group, or a siloxanyl group, and R1 and R2 are individually substituted or unsubstituted.