Additives made from fatty diamides for nucleophile-sensitive cross-linkable compositions

A rheology additive composition based on fatty acid diamide, comprising:

• a) from 92% to 100% by weight of one or more fatty acid diamides, said diamide(s) being treated in situ after preparation of the diamide by a neutralizing agent selected from the group consisting of inorganic or organic acids with a pKa less than 2 to reduce residual amine content in said treated one or more fatty acid diamides to a residual amine number, expressed in mg KOH/g, less than 0.05,
• b) optionally, from 1% to 8% by weight of at least one amorphous or semicrystalline oligomer with a Tg of greater than 60° C.,
• provided that, if said oligomer b) is present, the sum of the % by weight a) +b) is equal to 100% by weight of said diamide-based composition, and that a) and b) are miscible as a blend in the molten state, and that the said oligomer b) is devoid of any nucleophilic group or structure and wherein said diamide comprises an asymmetric diamide which corresponds to the reaction product of one mole of linear aliphatic C2 to C6 diamine with one mole of 12 hydroxy-stearic acid and one mole of C5 to C12 monocarboxylic acid.