Patent ID: 6884865

Claim:
A copolyamide, comprising macromolecular units at least the following monomers: (I) at least one difunctional monomer represented by the abbreviation AB (II) at least one multifunctional monomer represented by the abbreviation A a in which A represents a carboxylic acid function (III) at least one multifunctional monomer represented by the B b in which B represents an amine function the functions A and B being capable of reacting with each other to form an amide unit a and b being numbers that satisfy the following relationships: a≧2 b≧2 a≧3 if b=2 b≧3 if a=2 the ratio ax ax + by is between 0.4 and 0.6, in which x represents the number of moles of monomer (II) and y represents the number of moles of monomer (III) the ratio ax + by ( a + b ) * ( x + y + 0.9 ⁢ z ) is less than 0.12%, in which z represents the number of moles of monomer (I).