Polyamide, preparation process therefor and uses thereof

1. A process for preparing a polyamide comprising the repeating unit of formula I below:

in which

R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics; the process comprising a polycondensation reaction between:

at least one dicarboxylic acid or at least one carboxylic acid diester, at least one dinitrile or at least one acyl dichloride of respective formulae IV, IV′, IV″ and IV″′ below:

where R 1 and R 2 , which are identical or different, are chosen from C1-C4 alkyls;

and

at least one diamine of formula V below:

H 2 N—R—NI 2   (V)

wherein R represents a covalent bond or a divalent hydrocarbon-based group chosen from saturated or unsaturated aliphatics, saturated or unsaturated cycloaliphatics, aromatics, arylaliphatics and alkylaromatics.

2. The process according to claim 1 , wherein at least one diamine of formula V is biobased according to standard ASTM D6866.

3. The process according to claim 1 , wherein said process comprises a polycondensation reaction between:

at least one dicarboxylic acid of formula IV below:

and

at least one diamine of formula V below:

H 2 N—R—NH 2   (V).

4. The process according to claim 1 , wherein at least the dicarboxylic acid of formula IV is biobased according to standard ASTM D6866.

5. A method for making articles comprising preparing a polyamide according to the process of claim 1 , and molding, injection-molding, injection/blow-molding, extrusion/blow-molding, extruding or spinning the polyamide.