Process for Producing Ultrafine Powders Based on Polyamides, Ultrafine Polyamide Powders and Their Use

2:

• The process according to claim 1, wherein the suspension is used which comprises the inorganic particles having a mean size of the inorganic particles d50 in a range from 0.001 to 0.8 μm, measured in the suspension in the alcoholic medium as a volume-weighted median value of a peak analysis by means of static or dynamic light scattering, suspended in the alcoholic medium.

3:

• The process according to claim 1, wherein the suspension of the inorganic particles is at least one selected from the group consisting of Al2O3, TiO2, ZrO2, SiO2, ZnO, Bi2O3, CeO2, ITO, ATO, IZO, boron nitride, boron carbide, mixed oxides and spinels, suspended in the alcoholic medium, is used.

4:

• The process according to claim 1, wherein the suspension is used which is obtainable by suspending the inorganic particles in the alcoholic medium with introduction of an energy input of greater than 1000 kJ/m3.

5:

• The process according to claim 1, wherein the suspension is used which has a content of the inorganic particles in a range from 10 to 60% by weight based on the total weight of the suspension.

6:

• The process according to claim 1, wherein the suspension is used which is obtainable by suspending the inorganic particles having a specific surface area in a range from 5 to 200 m2/g in the alcoholic medium.

7:

• The process according to claim 1, wherein the suspension is used which is obtainable by suspending the inorganic particles in the alcoholic medium in the presence of a stabilizing additive or of a mixture of additives selected from the group consisting of phosphoric acid, mono- or dibasic phosphates, phosphoric esters, phosphonic acids, organically modified phosphonic acids, sulphuric acid, sulphuric acid derivatives, nitric acid, organic mineral acids, organic compounds having one or more acidic protons, carboxylic acids, phenols, basic organic compounds and amines.

8:

• The process according to claim 1, wherein the alcoholic medium used for the precipitation of the polyamide and/or the suspension of the inorganic particles is one or more alcohols which have a numerical ratio of oxygen atoms to carbon atoms in a range from 1:1 to 1:5.

9:

• The process according to claim 8, wherein the alcoholic medium used for the precipitation of the polyamide and/or the suspension of the inorganic particles is ethanol.

11:

• A coating composition comprising the ultrafine powder based on the polyamides according to claim 10.

12:

• A moulding comprising the ultrafine powder based on the polyamides according to claim 10.

13:

• A method for producing the mouldings of claim 12, comprising an injection, extrusion or blow of the moulding.

14:

• A method for producing the mouldings of claim 12, comprising producing a granule and subsequent thermoplastic, and further injecting, extruding or blowing the moulding.