CYDHD-531, a phenolic modified diamine hardener, is widely used for various antiseptic engineering, large-scale architecture and hydraulic projects.It is good at acid and alkali resistance. CYDHD-546, 548, m-phenylene diamine and aniline modified aromatic amine hardener, can be cured at room or medium temperature. Widely used for casting and pouring of small appliance, agglutination of civil work with low viscosity, good mechanical and electric properties.

CYDHD-593, modified diethylene triamine hardener is solidified under room temperature. Solidified lacquer film is excellent in anti-chemical erosion. Widely used for pouring, packing of electronic parts and agglutination of construction materials.

CYDHD-W280 is used in combination with CYDW-112W50 and CYDW-1113W50.CYD-240 is applied in combination with CYDBN-240 and CYDBN-240E.When used as hardener, BPA novolac resin is well capable of overcoming the deficiency caused by the existence of dicyandiamide and phenol linear novolac resin, meeting the requirements of copper clad epoxy laminates for high performance esp. for high heat resistance. When used as modifier after remixing with general hardeners, it can enhance the performance of condensate.