Air Products and Chemicals, Inc.

Roland E Grandin

Barton Milligan

William Edward Starner

Jeremiah P Casey

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.

Urethane linked hydroxy aromatic isocyanates

This invention relates to urethane linked mixtures of 2,4- and 2,6-toluenediisocyanates (ULTDI dimers) having low melting points and to a method of forming these systems. The urethane linked toluenediisocyanates containing from 45-90% of the 2,4- and 10-55% of the 2,6- isomer by weight are formed by reacting two moles of an appropriate isomer mix of toluenediisocyanate, with one mole of a specific alkylene glycol, e.g., 1,2-butanediol, diethylene glycol or dipropylene glycol under conditions such that essentially only one of the isocyanate groups on a toluenediisocyanate molecule reacts with a hydroxyl group of the glycol. Conditions are controlled such that the urethane linked toluenediisocyanates are formed. The resulting product, which has two unreacted isocyanate groups, is suited for producing a variety of elastomers including polyurethane polyurethane/urea or polyurea elastomers.

Low melting urethane linked toluenediisocyanates

This invention pertains to a process for preparing mononuclear aromatic amines by reacting an alkali metal amide with a mononuclear aromatic compound, e.g., benzene and toluene. The reaction is carried out in the presence of a metallic hydrogenation catalyst, suitably copper, nickel, rhodium or cobalt, the metal being present in an amount sufficient for catalyzing the reaction. The amine then is formed by adding a protonating agent to the resulting reaction product formed by the reaction of the alkali metal amide with the aromatic compound. The addition of the protonating agent liberates the amine.

Aromatic amines from alkali metal amide aminating agent and aromatic

The conversion of alkyl diaminobenzenes to the alkyl amino benzenes is carried out by contacting the alkyl diamino benzene with hydrogen in the presence of a nonsupported cobalt catalyst. Optionally, the reaction is carried out in the presence of water so that the water insoluble product formed can be separated from the water soluble reactants and by-products.

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Alburtis, PA, United States of America

Roland E Grandin