Antifriction coatings and methods of making antifriction coatings
AssigneeDdp Specialty Electronic Materials US, LLC
InventorsAnna Osichow, Marita Barth, Jochen Busch
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Abstract
A method of making an antifriction coating composition, comprising the steps of (A) combining (i) a solid lubricant, (ii) a solvent, (iii) a binder, and (iv) optionally, an additive; and (B) grinding the (i) solid lubricant in the solvent (ii) with a basket mill for sufficient time to form a dispersion of the ground (i) solid lubricant in the (ii) solvent, and wherein the binder (iii) and the optional additive (iv) are each independently combined with the solid lubricant (i) and solvent (ii) before, during, after, or a combination of two or more of before, during, and after, (B).
Claims10
A method of making an antifriction coating composition, comprising the steps of:
- (A) combining
- (i) a solid lubricant,
- (ii) a solvent,
- (iii) a binder, and
- (iv) optionally, an additive;
- and
- (B) grinding the (i) solid lubricant in the solvent (ii) with a basket mill, wherein the basket mill comprises a container and an agitator basket comprising beads having a diameter from 1 to 2.5 mm, a bead agitator, a dissolver disc, and a drive shaft, wherein the bead agitator and the dissolver disc, are engaged with the drive shaft, to form a dispersion of the ground (i) solid lubricant in the (ii) solvent, wherein the dispersion has a viscosity from 20 mPa·s to 2500 mPa·s and the ground solid lubricant has a particle size (d90) of up to 75 μm and (d50) of up to 25 μm,
- wherein the grinding is done in a single step,
- (C) forming a pre-dispersion of the binder, the solid lubricant, the solvent, and the optional additives using a dissolver disc, then (D) conducting the grinding (B) of the pre-dispersion in the same container that the pre-dispersion was formed.
Dependencies are inferred from the claim text.