DAP monomer (Diallyl Phthalate monomer) Buy DAP Monomer from China, contact Huanya Chemical. There is no more reason, since we represent the one and only diallyl phthalate monomer manufacturer. DAP monomer has two acrylic groups which is steady in room temperature, but highly active with heat and catalyzer. Also, it can be used to produce DAP pre-polymer which is used in thermoset plastics. CAS NO. :131-17-9 Package: Steel drums, net 200kg/drum