Patent ID: 6315300
Filing Date: 2001-11-13
Classification: C09K

Abstract:
A sealant for forming a fluid seal between the faying surface of two metallic substrates that are compressively and mechanically joined together, said sealant being liquid in its pre-cured condition and a dry solid in its cured condition, the transition from pre-cured to cured condition occurring at room temperature with a cure time not less than about 10 minutes and not more than about 16 hours, said sealant when cured having a Shore A hardness between about 30 and about 70, being impermeable and resistant to chemical attack by air, water, common solvents and petroleum fuels, resistant to compressive cold flow but deformable to conform to an abutting one of said surfaces or with a layer of similar sealant on the other of said surfaces, and flexible and resistant to a temperature range between about -65 degrees F and about 250 degrees F, said sealant comprising a cured copolymer of an isocyanate and a polyol, both the isocyanate and polyol having at least two functionalities, and the isocyanate and polyol when mixed before curing containing a dibutyl tin dilaurate catalyst in an amount respective to an intended cure rate, said sealant including a metal borate corrosion resistance component.