KBM-303

KBM-303 by Shin-Etsu acts as a coupling agent. Its individual molecules contain epoxy functional group and methoxy group characterized by different reactivity. It bonds organic material to inorganic material. KBM -303 is typically used in the form of a dilute aqueous solution. It is effective with polyethylene, polyethylene, diallyl phthalate, polystyrene, polyvinyl chloride (PVC), polycarbonate, melamine, polyimide, polybutyl terephthalate (PBT), polyethyl terephthalate (PET) and acrylonitrile butadiene styrene (ABS). Also effective with furan, nylon, styrene butadiene rubber (SBR), nitrile rubber, epichlorohydrin rubber, butyl rubber, polysulfide, polyurethane and epoxy resins. When it is used for surface treating an inorganic material to promote adhesion between the inorganic material and an organic material, it acts by forming chemical bonds with resins, hydrogen bonding with resins and improving the wettability as well as miscibility of resins. KBM-303 is used to make highly weatherable paints. Also used as a raw material for hard-coat materials.