Phosphate-based polyallyl isocyanurate cross-linker compounds, polyalkenyl isocyanurate cross-linker compounds, and a flame-retardant resin are disclosed. The phosphate-based polyallyl isocyanurate compound can have allyl phosphate substituents with variable functional groups. The phosphate-based polyallyl isocyanurate compound can have three or six allyl phosphate substituents. The brominated polyalkenyl isocyanurate compound can have brominated alkene-terminated substituents. The brominated alkene-terminated substituents can have variable functional groups and variable chain lengths. Both the phosphate-based polyallyl isocyanurate compounds and the brominated polyalkenyl isocyanurate compounds can be cross-linkers for epoxide polymers, acrylate polymers, vinylbenzene-terminated poly(phenyleneoxide) polymers, etc. The phosphate-based polyallyl isocyanurate compounds and the brominated polyalkenyl isocyanurate compounds can also be flame-retardant. The flame-retardant resin can contain the phosphate-based polyallyl isocyanurate compounds or the brominated polyalkenyl isocyanurate compounds, and it can be incorporated into a printed circuit board laminate.