초록 ▼

A tank tread pad and composition for making. A tank tread pad is formed from a polymeric material which is formed by an inter penetrating polymer network comprising a first urethane component and a second resinous component which cures under different conditions and is substantially unreactive with

A tank tread pad and composition for making. A tank tread pad is formed from a polymeric material which is formed by an inter penetrating polymer network comprising a first urethane component and a second resinous component which cures under different conditions and is substantially unreactive with the urethane. A fiberous reinforcement is present in the cured resinous material.

대표청구항 ▼

A track pad for a track laying device having an endless track of articulated metal track shoes, said pad being adapted to be held within a track show with one face exposed to prevent contact between the metal track shoe and the road over which the track is moving, said track pad comprising: a first

A track pad for a track laying device having an endless track of articulated metal track shoes, said pad being adapted to be held within a track show with one face exposed to prevent contact between the metal track shoe and the road over which the track is moving, said track pad comprising: a first urethane resinous material formed by the reaction of an isocyanate terminated prepolymer having an isocyanate functionality greater than 2 and a polyol, said urethane reaction being catalyzed by an oramatic co-curing agent said curing agent having the capacity to immediately begin catalyzing the isocyanate terminated prepolymer at room temperature to a solid material and continuing to catalyze the urethane reaction at room temperature as the resin mixture ages; a second resinous component chosen from the class consisting of polyester resins, epoxy resins, vinyl-ester resins, phenolic resins, polystyrene resins and isocyanurates separate and distinct from said urethane component, said second resins system being adapted to cure only when the second resin reaches a curing temperature of about 200°-350°F. and being substantially unreactive with said urethane resin so that curing of said resins produces an interpenetrating resin matrix and a fiberous filler material in the resin matrix.