Abrasive article and coating

Patent metadata

Field	Value
Publication number	US-9486896-B2
Application number	US-201313926132-A
Country	US
Kind code	B2
Filing date	Jun 25, 2013
Priority date	Jun 28, 2012
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

An abrasive article includes a body having an abrasive portion. The abrasive portion includes a bond material and abrasive particles located within the bond material. The body also comprises a coating coupled to and overlying at least a portion of an exterior surface of the abrasive portion. The coating has a water vapor transmission rate of not greater than about 2 g/m 2 -day.

First claim

What is claimed is:

1. An abrasive article, comprising:
a body comprising:
an abrasive portion including
a bond material; and
abrasive particles located within the bond material;

wherein the body comprises a coating bonded directly to and overlying at least a portion of an exterior surface of the abrasive portion,
wherein the coating has a water vapor transmission rate (WVTR) of not greater than about 2 g/m 2 -day,
wherein the coating includes a first film comprising a metal layer and a second film comprising a polymeric material, and
wherein the coating does not include shrink wrapping, vacuum wrapping, or a combination thereof.

2. The abrasive article of claim 1 , wherein the coating is configured to be selectively removable when the abrasive portion is used.

3. The abrasive article of claim 1 , wherein the body comprises a peripheral portion and the abrasive portion is at least partially disposed at the peripheral portion.

4. The abrasive article of claim 1 , wherein the body comprises a first major face defining a working surface, and the coating overlies essentially an entirety of the working surface.

5. The abrasive article of claim 1 , wherein the metal layer of the coating comprises a composition selected from the group consisting of aluminum, copper, nickel, alloys and any combination thereof.

6. The abrasive article of claim 1 , wherein the coating comprises an oxide, carbide, nitride, SiC, polyethylene, saran, or any combination thereof.

7. The abrasive article of claim 1 , wherein the coating has a thickness of at least about 0.2 microns.

8. The abrasive article of claim 1 , wherein the coating is non-abrasive.

9. The article of claim 1 , wherein the abrasive article exhibits a Relative G-Ratio of at least 0.8 after 12 weeks with external conditions of 40° C. and 80% relative humidity.

10. The article of claim 1 , wherein the abrasive article has an internal relative humidity not greater than 50% at 20° C. after 25 weeks at 40° C. and 80% relative humidity.

11. The abrasive article of claim 1 , wherein the abrasive portion has an abrasive hardness, and the coating has a coating hardness that is less than the abrasive hardness.

12. The abrasive article of claim 1 , wherein the coating further comprises a desiccant layer.

13. The article of claim 1 , wherein the polymeric material of the coating comprises a composition selected from the group consisting of a polyester, polyethylene terephthalate, liquid crystal polymer, aromatic polyester polymers, and any combination thereof.

14. The article of claim 1 , wherein the metal layer and the polymeric material are in direct contact with each other.

15. The article of claim 1 , wherein at least one of the metal layer and the polymeric material is in direct contact with the abrasive portion.

16. The article of claim 13 , wherein the polymeric material of the coating comprises a polyester.

17. The article of claim 14 , wherein the polyester comprises polyethylene terephthalate, liquid crystal polymer, or a combination thereof.

18. An abrasive article, comprising:
a body comprising:
an abrasive portion including
a bond material; and
abrasive particles located within the bond material;

wherein the body comprises a coating bonded directly to and overlying at least a portion of an exterior surface of the abrasive portion;
wherein the coating has a water vapor transmission rate (WVTR) of not greater than about 2 g/m 2 -day;
wherein the coating includes a first film comprising a metal layer and a second film comprising a polymeric material; and
wherein the coating is configured to be selectively removable when the abrasive portion is used.

19. An abrasive article, comprising:
a body comprising:
an abrasive portion including
a bond material; and
abrasive particles located within the bond material;

wherein the body comprises a coating bonded directly to and overlying at least a portion of an exterior surface of the abrasive body;
wherein the coating has a water vapor transmission rate (WVTR) of not greater than about 2 g/m 2 -day;
wherein the coating includes a first film comprising a metal layer and a second film comprising a polymeric material; and
wherein the coating is applied to the abrasive body by dipping, sputtering, printing, deposition, spraying, painting, or a combination thereof.

20. The abrasive article of claim 19 , wherein the coating is configured to be selectively removable when the abrasive portion is used.

Assignees

• Zhang Han
• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Zhang Han

Classifications

• Y10T428/31935

  Ester, halide or nitrile of addition polymer · CPC title

• Y10T428/24983

  Hardness · CPC title

• B24D3/004

  with special coatings · CPC title

• B24D7/04

  with reinforcing means · CPC title

• B24D18/00 Primary

  Manufacture of grinding tools {or other grinding devices}, e.g. wheels, not otherwise provided for · CPC title