| 摘要 |
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. |
