... peroxide system in rubber process Rubber vulcanizing agent PDM(HVA-2) Chemical name: N,N'-m-phenylene bismaleim Molecular ... tetrahydrofuran and heat propanone, insoluble in petroleum ether, chloroform, benzene and water, melting point is higher than 195°C. ... .5-1.0 portion when used as antiscorching agent, 2-3 portion when used as vulcanizing agent, 1.5 ... agent.Packing:composite bag, Net wt. 20kg. HVA-2