초록 ▼

Polyimide oligomers are made by the condensation of suitable anhydrides, dianhydrides, and diamines. To a chilled solution of diamine, a mixture of anhydride and dianhydride is added under an inert atmosphere. The cooling is discontinued following the mixing, and the resulting three reactant mixture

Polyimide oligomers are made by the condensation of suitable anhydrides, dianhydrides, and diamines. To a chilled solution of diamine, a mixture of anhydride and dianhydride is added under an inert atmosphere. The cooling is discontinued following the mixing, and the resulting three reactant mixture is allowed to react.

대표청구항 ▼

A method of making polyimide oligomers, comprising the steps of: (a) dissolving a diamine in a suitable solvent; (b) chilling the diamine solution; (c) mixing together an unsaturated monoanhydride and a dianhydride to form a premix; (d) in an inert atmosphere, adding the premix to the diamine soluti

A method of making polyimide oligomers, comprising the steps of: (a) dissolving a diamine in a suitable solvent; (b) chilling the diamine solution; (c) mixing together an unsaturated monoanhydride and a dianhydride to form a premix; (d) in an inert atmosphere, adding the premix to the diamine solution while continuing to chill the diamine solution; and (e) removing the cooling source after the addition of the premix to the diamine solution is completed.