Coated abrasives having an improved supersize coating

Patent metadata

Field	Value
Publication number	US-11660726-B2
Application number	US-202017010940-A
Country	US
Kind code	B2
Filing date	Sep 3, 2020
Priority date	Sep 5, 2019
Publication date	May 30, 2023
Grant date	May 30, 2023

Abstract

Systems and methods include providing a coated abrasive article with an enhanced anti-loading composition in a supersize coat. The anti-loading composition includes a mixture of a metal stearate, at least one performance component, and a polymeric binder composition.

First claim

What is claimed is:

1. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on the backing material, wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a make coat binder composition;
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a wax,
wherein the wax comprises a fatty acid ester or plurality of fatty acid esters, a fatty alcohol or plurality of fatty alcohols, an acid or plurality of acids, a hydrocarbon or plurality of hydrocarbons, or a combination thereof.

2. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on the backing material, wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a make coat binder composition;
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium stearate, lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a metal sulfide,
wherein the metal sulfide comprises an iron sulfide, a copper sulfide, a copper iron sulfide
wherein the metal sulfide comprises not less than 0.5 wt. % to not greater than 35 wt. % of the mixture.

3. The coated abrasive article of claim 1 , wherein the wax comprises a natural wax, a synthetic wax, or a combination thereof.

4. The coated abrasive article of claim 1 , wherein the wax comprises not less than 0.5 wt. % to not greater than 25 wt. % of the mixture.

5. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on the backing material wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a make coat binder composition;
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a protein,
wherein the protein comprises a whey protein.

6. The coated abrasive article of claim 5 , wherein the supersize coat is substantially transparent, and wherein the supersize coat is substantially free of opaque streaking defects.

7. The coated abrasive article of claim 6 , wherein the whey protein comprises not less than 0.1 wt. % to not greater than 30 wt. % of the mixture.

8. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on the backing material, wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a make coat binder composition;
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium stearate, lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a metal sulfide, a fatty acid, a wax, a protein, a microsphere, a plurality of microspheres, or a combination thereof,
wherein the microspheres comprise ceramic microspheres,
wherein the ceramic microspheres comprise a silica gel, an alumina gel, a silica alumina gel, or a combination thereof.

9. The coated abrasive article of claim 8 , wherein the ceramic microspheres comprise an amorphous material, a crystalline material, a solid material, a porous material, or a combination thereof.

10. The coated abrasive article of claim 9 , wherein the ceramic microspheres comprise an amorphous, porous silica alumina gel.

11. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on the backing material, wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a mate coat binder composition,
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium stearate, lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a plurality of microspheres,
wherein the microspheres comprise polymeric microspheres,
wherein the polymeric microspheres comprise a polyurethane, a polystyrene, a polyethylene, a rubber, a poly(methyl methacrylate) (PMMA), a glycidyl methacrylate, an epoxy, or a combination thereof.

12. The coated abrasive article of claim 11 , wherein the polymeric microspheres comprise an aliphatic polyurethane.

13. An abrasive article, comprising:
a backing material;
an abrasive layer disposed on backing material, wherein the abrasive layer comprises a plurality of abrasive particles disposed at least partially on or in a make coat binder composition;
a size coat disposed over the abrasive layer; and
a supersize coat disposed over the size coat, wherein the supersize coat comprises a mixture of a metal stearate or a hydrate form thereof, at least one performance component, and a polymeric binder composition,
wherein the metal stearate comprises zinc stearate, calcium stearate, lithium stearate, hydrate forms thereof, or a combination thereof,
wherein the performance component comprises a metal sulfide, a fatty acid, a wax, a protein, a microsphere, a plurality of microspheres, or a combination thereof,
wherein the mixture comprises:
50-95 wt. % of the metal stearate;
0.1 to 20 wt. % of the plurality of microspheres;
0.5 wt. % to 25 wt. % of a wax; and
1-25 wt. % of the polymeric binder composition.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Haso Fadi
• Maassel Anna
• Herbert Charles G
• Rice William C

Classifications

• B24D11/00

  Constructional features of flexible abrasive materials; Special features in the manufacture of such materials · CPC title

• B24D11/001

  Manufacture of flexible abrasive materials · CPC title

• B24D3/342 Primary

  incorporated in the bonding agent · CPC title

• B24D3/346

  utilised during polishing, or grinding operation · CPC title

• B24D3/20

  and being essentially organic · CPC title