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AssigneeOtis Elevator Company
InventorsHugh J. O'Donnell, Vincent J. Gajewski, Knizley James B., Richard L. Palinkas, Ronald O. Rosenberg
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An ether-based polyurethane article comprises a toluene diisocyanate-terminated polyether polyol prepolymer cured with a blended polyester polyol/diamine curative. The article may be made by mixing a toluene diisocyanate-terminated polyether polyol prepolymer with a blended polyester polyol/diamine curative to form a reaction mixture. A suitably shaped mold is preheated and filled with the reaction mixture with sufficient pressure to displace air in the mold. The reaction mixture is held in the preheated mold to cure the reaction mixture and form the article. The cast article is removed from the mold and post-cured to complete the chemical cross-linking reaction.
An ether-based polyurethane article, comprising a toluene diisocyanate-terminated polyether polyol prepolymer cured with a blended polyester polyol/diamine curative.
An ether-based polyurethane elevator sheave liner, comprising a toluene diisocyanate-terminated polytetramethylene ether glycol polyol prepolymer cured with a blended polycaprolactone/4,4'-methylene-bis(2-chloroaniline) curative.
A method of casting an ether-based polyurethane article, comprising
An ether-based polyurethane elastomer, formed by the reaction of a toluene diisocyanate-terminated polyether polyol prepolymer with a 10/90 to 90/10 curative blend of a polyester polyol/diamine curative.
Dependencies are inferred from the claim text.