Patent ID: 6143862
Filing Date: 2000-11-07
Classification: C08G

Abstract:
A copolyamide resulting from the polycondensation of a mixture of:(a) dodecanelactam (L12) or of 12-aminododecanoic acid (A12); and(b) 11-aminoundecanoic acid (A11),wherein the monomer L12 or A12 represents 1-15% weight of the mixture or A12 represents 85-99% by weight of the mixture or L12 represents 85-94% by weight of the mixture and the copolyamide has a melting point (mp) as a function of the composition, the units originating from the monomer A12 and L12 being in a majority or minority respectively:(1) A12 or L12 in a majority: mp (.degree. C.).gtoreq.176-0.567.times.(% A11)(2) A12 or L12 in a minority: mp (.degree. C.).gtoreq.187-0.5.times.(% A12 or L12),said melting point being determined by taking the peaks of the exotherm signals obtained in differential thermal analysis with a rate of heating of 10.degree. C./minute for the second heating run.