Injection moldable amide-imide copolymers
AssigneeStandard Oil Company (Indiana)
InventorsRobert G. Keske, James R. Stephens
Life of this patent
Estimating the term…
Abstract
Injection moldable copolymers are prepared from fully or partially acylated aromatic diamines and aromatic tricarboxylic anhydride compounds, aromatic dicarboxylic acids or mixtures of aromatic tricarboxylic acid anhydrides and aromatic dicarboxylic acids. These copolymers are useful for the preparation of injection molded articles and fibers.
Claims33
A process for the preparation of random linear injection moldable amide-imide and amide copolymers having an inherent viscosity of about 0.6 to 3.0 which process comprises reacting fully or partially acylated aromatic diamines with aromatic tricarboxylic acid anhydrides, aromatic dicarboxylic acids or mixtures of aromatic dicarboxylic acids and aromatic tricarboxylic acid anhydrides in a molar ratio of about 9:1 to about 1:9 at a temperature of about 150.degree. to 750.degree. F., and wherein the molar ratio of the diamines to the anhydride or acid, and anhydride mixture is about 0.9:1 to 1.1:1 and at least 50% of the amine functionality is acylated in the presence of C.sub.2 through C.sub.8 containing aliphatic acids or C.sub.4 to C.sub.16 containing aliphatic anhydrides.
A continuous process for the preparation of random linear injection moldable amide-imide and amide copolymers having an inherent viscosity of about 0.6 to 3.0 which continuous process comprises reacting fully or partially acylated aromatic diamines with aromatic tricarboxylic acid anhydrides, aromatic dicarboxylic acids, or mixtures of aromatic dicarboxylic acids and aromatic tricarboxylic acid anhydrides in a molar ratio of about 9:1 to 1:9 at a temperature of about 150.degree. to 750.degree. F. and wherein the molar ratio of the diamines to the anhydride or acid, or acid and anhydride mixture is 0.9:1 to 1.1:1 and at least 50% of the total amine functionality is acylated in the presence of C.sub.2 through C.sub.8 containing aliphatic acids or C.sub.4 to C.sub.16 containing aliphatic anhydrides.
Dependencies are inferred from the claim text.