Abstract: A flame retardant composition especially useful for imparting flame retardancy to polyurethane foams includes: a) a major amount by weight of at least one polyphosphate ester flame retardant of the formula: wherein R is an alkylene or arylene group, each R1 is independently selected to be an alkyl or aryl group, and n is an integer of from 1 to about 10; and b) a minor amount by weight of melamine.

Abstract: A flame retardant composition especially useful for imparting flame retardancy to polyurethane foams includes: a) major amount by weight of at least one phosphate ester flame retardant of the formula: wherein n is 0 or 1 to about R1, R2, R3 and R4 each independently is a non-halogenated or halogenated alkyl or aryl group, and R5 is a non-halogenated or halogenated alkylene or arylene group, provided, that when n is 1 to about 10, at least one of R1, R2, R3, R4 and R5 is substituted with at least one halogen atom; and, b) a minor amount by weight of melamine.

Abstract: A flame retardant composition especially useful for imparting flame retardancy to polyurethane foams includes: a) major amount by weight of at least one phosphate ester flame retardant of the formula: wherein n is 0 or 1 to about R1, R2, R3 and R4 each independently is a non-halogenated or halogenated alkyl or aryl group, and R5 is a non-halogenated or halogenated alkylene or arylene group, provided, that when n is 1 to about 10, at least one of R1, R2, R3, R4 and R5 is substituted with at least one halogen atom; and, b) a minor amount by weight of melamine.

Abstract: An improved access lid assembly is provided for a subsurface chamber used to service aircraft. A lift assembly is provided for elevating the lid upwardly from an opening in a surrounding mounting frame disposed atop the subsurface chamber while maintaining the lid in a horizontal disposition. A hinge assembly connects the lift assembly to the lid at a peripheral location thereon on the underside of the lid, without any connection to the peripheral edge of the lid. The hinge assembly allows the lid to rotate about a horizontal axis to an open position through an arc of at least ninety degrees. By avoiding any connection to the peripheral edges of the lid, an elastomeric, annular seal can be mounted to completely encircle the lid and provide a water-tight barrier about the access opening. The seal is mounted between the upper and lower surfaces of the lid within a groove, preferably with a dovetail connection, to securely grip and hold the seal upon the edge of the lid.