This invention relates to urethane linked hydroxy aromatic isocyanates and to a process for producing such urethane linked hydroxy aromatic isocyanates. The compositions are formed by reacting one equivalent aromatic diisocyanate with one equivalent of an alkylene polyol under conditions such that only one of the isocyanate groups react with the hydroxyl group of the polyol. Conditions are controlled such that the urethane linked hydroxy aromatic isocyanates are formed. The resulting product is suited for producing a variety of elastomers including a one component polyurethane elastomer.
Process for the preparation of polyisocyanate prepolymers and polyurethanes and resulting compositions
申请人:AIR PRODUCTS AND CHEMICALS, INC.
公开号:EP0370408A1
公开(公告)日:1990-05-30
This invention relates to a polyisocyanate prepolymer for polyurethane and polyurethane/urea elastomer synthesis and to the resulting elastomer. The prepolymer is formed by reacting an alkyl C₁₋₆ substituted toluenediisocyanate with a long chain diol under conditions such that essentially a 2:1 adduct is formed. Excess alkyl-substituted toluenediisocyanate is removed prior to forming the elastomer.