Liquid diphenylmethane diisocyanate compositions
AssigneeImperial Chemical Industries PLC
InventorsJohn B. Holt, Arthur Ibbotson
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Abstract
A liquid diphenylmethane diisocyanate composition which comprises diphenylmethane diisocyanate in which from 10 to 35% of the isocyanate groups have been reacted with a mixture of alkylene glycols each containing at least three carbon atoms, one of the glycols being dipropylene glycol, tripropylene glycol or a higher propylene glycol. The composition is made by heating together the reactants.
Claims14
A liquid diphenylmethane diisocyanate composition comprising diphenylmethane-4,4'-diisocyanate containing not more than 10% by weight of isomers thereof in which from 10% to 35% of the isocyanate groups have been reacted with a mixture of alkylene glycols containing at least three constituent glycols each having at least three carbon atoms, one of said glycols being dipropylene glycol, tripropylene glycol or a higher polypropylene glycol.
Dependencies are inferred from the claim text.