초록 ▼

High modulus filaments are melt-spun from polyimide-esters derived from 2,6-naphthalene dicarboxylic acid and either a substituted diphenol and 4-(4′-carboxyphthalimido)benzoic acid or terephthalic acid and 4-(4′-hydroxyphthalimido)phenol. The polyimide esters are optically anisotropic in the melt.

High modulus filaments are melt-spun from polyimide-esters derived from 2,6-naphthalene dicarboxylic acid and either a substituted diphenol and 4-(4′-carboxyphthalimido)benzoic acid or terephthalic acid and 4-(4′-hydroxyphthalimido)phenol. The polyimide esters are optically anisotropic in the melt. As-spun filaments from these polymers can be heat treated while free from tension to increase their tenacity.

대표청구항 ▼

A filament-forming polyimide-ester consisting essentially of units having the structural formulas [Figure] [Figure] [Figure] such that when X is [Figure] Y is －O－; R is Cl or 1 to 2 carbon alkyl; unit III is present in an amount of from 5-20 mole percent based on the total number of moles of units;

A filament-forming polyimide-ester consisting essentially of units having the structural formulas [Figure] [Figure] [Figure] such that when X is [Figure] Y is －O－; R is Cl or 1 to 2 carbon alkyl; unit III is present in an amount of from 5-20 mole percent based on the total number of moles of units; and the sum of moles of units II and III is substantially equal to the number of moles of unit I; and when X is －O－; Y is [Figure] R is H; unit III is present in an amount of from 5-20 mole percent based on the total number of moles of units; and the sum of moles of units I and III is substantially equal to the number of moles of unit II.