RHEOLOGICAL ADDITIVES BASED ON DIAMIDE, FUNCTIONALIZED POLYMER AND WAX

1 . An additive comprising:

30% to 90% of a component A) which is at least one diamide;

5% to 40% of a component B) which is at least one functionalized polymer; and

5% to 60% of a component C) which is at least one wax;

the % values being % values by weight, with respect to the weight of the additive.

2 . The additive according to claim 1 , wherein component A) comprises a diamide obtained by reaction between at least one diamine and at least one carboxylic acid,

the diamine being chosen from a C2 to C24 aliphatic diamine, a C6 to C18 cycloaliphatic diamine, a C6 to C24 aromatic diamine and their mixtures; and

the carboxylic acid being a saturated or unsaturated, linear or branched, unsubstituted or hydroxylated, C2 to C36 carboxylic acid.

3 . The additive according to claim 2 , wherein component A) comprises a diamide obtained with at least one diamine chosen from a C2 to C24 aliphatic diamine.

4 . The additive according to claim 2 wherein component A) comprises a diamide obtained with at least one carboxylic acid chosen from a C2 to C22 carboxylic acid, and optionally an unsubstituted C2 to C22 carboxylic acid.

5 . The additive according to claim 1 wherein component A) comprises a diamide obtained by reaction between 1,2-ethylenediamine, 1,5-pentamethylenediamine or 1,6-hexamethylenediamine and 12-hydroxystearic acid and optionally decanoic acid.

6 . The additive according to claim 1 wherein the additive comprises from 35% to 90% by weight of component A), with respect to the weight of the additive.

7 . The additive according to claim 1 wherein component B) comprises a polymer functionalized by polar groups.

8 . The additive according to claim 1 wherein component B) comprises a functionalized polymer having an acid number of 3 to 50, or 5 to 40, or 8 to 35, or 10 to 25 mg KOH/g.

9 . The additive according to claim 1 wherein component B) comprises a functionalized polyolefin.

10 . The additive according to claim 1 wherein the additive comprises from 5% to 35% by weight of component B), with respect to the weight of the additive.

11 . The additive according to claim 1 wherein component C) comprises a wax exhibiting a softening point of greater than 70° C.

12 . The additive according to claim 1 wherein component C) comprises a wax chosen from a mineral wax, a natural wax, a synthetic wax and their mixtures; a paraffin wax, a microcrystalline wax, a ceresin, a montan wax, a ceride, a diol or triol completely or partially esterified with fatty acids, a vegetable or animal wax, a Fischer-Tropsch wax, a polyethylene and/or polypropylene wax, a poly(ethylene oxide) and/or poly(propylene oxide) wax and their mixtures; and hydrogenated castor oil.

13 . The additive according to claim 1 wherein component C) comprises a hydroxylated wax.

14 . The additive according to claim 1 wherein the additive comprises from 5% to 55% by weight of component C), with respect to the weight of the additive.

15 . The additive according to claim 1 wherein a ratio by weight of the component A) to the component B) ranges from 0.8 to 10.

16 . The additive according to claim 1 wherein the additive is in solid form.

17 . A preactivated additive composition comprising the additive according to claim 1 and a plasticizer.

18 . A binder composition comprising a binder and the additive according to claim 1 .

19 . The binder composition according to claim 18 , which is a coating composition, a varnish, rendering, surface gel, paint or ink composition, an adhesive, glue or mastic composition, a moulding composition, a composite material composition, a chemical sealing composition, a leaktightness agent composition, a photocrosslinkable composition for stereolithography or for 3D printing of objects.

20 . (canceled)