초록 ▼

An aqueous-based composition comprising an aqueous solution of the product formed of the combination of a polyamide-amic acid and a triamine, preferably wherein the polyamide-amic acid is prepared from trimellitic acid halide or its equivalent and an aromatic diamine comprising 4,4'-methylenedianili

An aqueous-based composition comprising an aqueous solution of the product formed of the combination of a polyamide-amic acid and a triamine, preferably wherein the polyamide-amic acid is prepared from trimellitic acid halide or its equivalent and an aromatic diamine comprising 4,4'-methylenedianiline.

대표청구항 ▼

1. An aqueous solution comprisinga. a polyamide-amic acid having an acid number in the range of from about 120 mg KOH/g to the theoretical maximum value, said polyamide-amic acid comprising amide-amic acid units according to structural formula: [EQU5] and amide-imide units according to the structura

1. An aqueous solution comprisinga. a polyamide-amic acid having an acid number in the range of from about 120 mg KOH/g to the theoretical maximum value, said polyamide-amic acid comprising amide-amic acid units according to structural formula: [EQU5] and amide-imide units according to the structural formula: [EQU6]wherein R is divalent arylene radical and wherein the mole ratio of said amide-amic acid units to said amide-imide units lies in a range of from about 18:1 to about 5:1; b. from about 5 to about 50 wt. % tertiary aliphatic amine; and c. an amount of water sufficient to provide a polyamide-amic acid content of from about 0.5 to about 15 wt. %, based on the combined weight of said tertiary aliphatic amine, said water and said polyamide-amic acid.