Coating composition and washer for vehicle drive shafts manufactured therefrom

Patent metadata

Field	Value
Publication number	US-10494544-B2
Application number	US-201715834591-A
Country	US
Kind code	B2
Filing date	Dec 7, 2017
Priority date	Sep 11, 2017
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

Disclosed is a coating composition including an amount of about 5 to 15 wt % of polyamide-imide (PAI), an amount of about 5 to 15 wt % of polytetrafluoroethylene (PTFE), an amount of about 0.5 to 1.5 wt % of fluorosilane, an amount of about 1 to 5 wt % of a ceramic particle, and a solvent component, wherein all the wt % are based on the total weight of the coating composition.

First claim

What is claimed is:

1. A coating composition for coating a washer for vehicle drive shafts comprising:
an amount of about 5 to 15 wt % of polyamide-imide (PAI);
an amount of about 5 to 15 wt % of polytetrafluoroethylene (PTFE);
an amount of about 0.5 to 1.5 wt % of fluorosilane;
an amount of about 1 to 5 wt % of a ceramic particle; and
a solvent component,
all the wt % based on the total weight of the coating composition.

2. The coating composition of claim 1 , wherein the fluorosilane comprises at least one of perfluorodecyltrimethoxysilane and trifluoropropyltrimethoxysilane.

3. The coating composition of claim 1 , wherein the fluorosilane has a molecular structure comprising an organic functional group and an inorganic functional group,
the organic functional group is bonded to the polyamide-imide (PAI) or the polytetrafluoroethylene (PTFE), and
the inorganic functional group is bonded to the ceramic particle or a matrix of the washer.

4. A coating composition for coating a washer for vehicle drive shafts consisting essentially of:
an amount of about 5 to 15 wt % of the polyamide-imide (PAI);
an amount of about 5 to 15 wt % of the polytetrafluoroethylene (PTFE);
an amount of about 0.5 to 1.5 wt % of the fluorosilane;
an amount of about 1 to 5 wt % of the ceramic particle; and
the solvent component,
all the wt % based on the total weight of the coating composition.

5. A coating composition for coating a washer for vehicle drive shafts consisting of:
an amount of about 5 to 15 wt % of the polyamide-imide (PAI);
an amount of about 5 to 15 wt % of the polytetrafluoroethylene (PTFE);
an amount of about 0.5 to 1.5 wt % of the fluorosilane;
an amount of about 1 to 5 wt % of the ceramic particle; and
the solvent component,
all the wt % based on the total weight of the coating composition.

6. A washer comprising:
a washer body comprising a stainless steel; and a coating layer formed by using a coating composition,
wherein the coating composition comprises an amount of about 5 to 15 wt % of polyamide-imide (PAI), an amount of about 5 to 15 wt % of polytetrafluoroethylene (PTFE), an amount of about 0.5 to 1.5 wt % of fluorosilane, an amount of about 1 to 5 wt % of a ceramic particle and a solvent component, all the wt % based on the total weight of the coating composition.

7. The washer of claim 6 , wherein the coating layer has a thickness of about 15 to 25 μm.

8. A method of manufacturing a washer for a vehicle drive shaft comprising:
providing a washer body comprising a stainless steel; and
forming a coating layer on the washer body with a coating composition comprising an amount of about 5 to 15 wt % of polyamide-imide (PAI), an amount of about 5 to 15 wt % of polytetrafluoroethylene (PTFE), an amount of about 0.5 to 1.5 wt % of fluorosilane, an amount of about 1 to 5 wt % of a ceramic particle, and a solvent component, wherein the all wt % based on the total weight of the coating composition.

9. The method of claim 8 , wherein the coating layer has a thickness of about 15 to 25 μm.

10. The method of claim 8 , wherein the coating layer is formed by curing the coating composition at a temperature of about 200 to 300° C.

11. The method of claim 8 , wherein the fluorosilane has a molecular structure including an organic functional group and an inorganic functional group, and
the coating layer has a structure in which the organic functional group is bonded to the polyamide-imide (PAI) or the polytetrafluoroethylene (PTFE), and the inorganic functional group is bonded to the ceramic particle or the washer body.

12. A vehicle comprising a washer of claim 6 .

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp

Inventors

• Kim Yool Koo

Classifications

• C09D5/08

  Anti-corrosive paints · CPC title

• C08K5/5406

  containing elements other than oxygen or nitrogen · CPC title

• F16B43/00

  Washers or equivalent devices; Other devices for supporting bolt-heads or nuts (circlips F16B21/18; {for indicating tensile load F16B31/02; forming a whole with the bolt or nut F16B33/00; locking bolts or nuts by means of a fixed plate or ring, or washer-like resilient plates F16B39/10, F16B39/24}) · CPC title

• C08G73/14 Primary

  Polyamide-imides · CPC title

• C09D179/08 Primary

  Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors · CPC title