Abrasive article

Patent metadata

Field	Value
Publication number	US-11358254-B2
Application number	US-201616092429-A
Country	US
Kind code	B2
Filing date	Dec 23, 2016
Priority date	Apr 13, 2016
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

Abrasive articles, along with related compositions and methods, are provided. A first aspect relates to an abrasive article comprising a backing and an abrasive layer disposed on a major surface of the backing. The abrasive layer comprises a particulate mixture comprising formed abrasive particles and diluent abrasive particles. Based on the overall weight of the particulate mixture, about 0 wt. % to less than 10 wt. % formed abrasive particles having a substantially monodisperse particle size of from about 80 micrometers to about 120 micrometers; and about greater than 90 wt. % to about 99 wt. % diluent abrasive particles having a median particle size of from about 50 micrometers to about 250 micrometers.

First claim

What is claimed is:

1. A supersize coat, comprising
a metal salt of a (C 12 -C 22 ) long-chain fatty acid; and
a styrene-acrylic polymer binder, wherein the styrene-acrylic polymer binder has a minimum film-forming temperature of up to 80 degrees Celsius, wherein the styrene-acrylic polymer binder is an ammonium salt of the styrene-acrylic polymer binder.

2. The supersize coat of claim 1 , wherein the supersize coat is substantially transparent.

3. The supersize coat of claim 1 , wherein the metal salt is of a (C 14 -C 18 ) long-chain fatty acid.

4. The supersize coat of claim 3 , wherein the metal salt is a stearate salt.

5. The supersize coat of claim 4 , wherein the stearate salt is calcium stearate.

6. The supersize coat of claim 1 , further comprising dipropylene glycol n-propyl ether.

7. The supersize coat of claim 1 , wherein the supersize coat displays a transmittance of from about 40 percent to about 80 percent according to a Transmittance Test.

8. The supersize coat of claim 1 , wherein the supersize coat displays a transmittance of at least 50 percent according to a Transmittance Test.

9. The supersize coat of claim 1 , wherein the ammonium salt of the styrene-acrylic polymer binder has a weight average molecular weight (Mw) of at least 200,000 g/mol.

10. The supersize coat of claim 1 , wherein the metal salt of a (C 12 -C 22 ) long-chain fatty acid is present in an amount of up to 95 percent by weight based on the normalized weight of the supersize coat.

11. The supersize coat of claim 10 , wherein the styrene-acrylic polymer binder is present in an amount of at least 3 percent by weight based on the normalized weight of the supersize coat.

12. The supersize coat of claim 1 , further comprising clay particles dispersed in the supersize coat.

13. The supersize coat of claim 1 , wherein the supersize coat does not include a surfactant.

14. The supersize coat of claim 1 , wherein the styrene-acrylic polymer binder has a Tg of about 98 degrees Celsius.

15. An abrasive article comprising:
a backing;
an abrasive layer disposed on a major surface of the backing, and
the supersize coat of claim 1 disposed on a major surface of the abrasive layer opposite the backing.

16. The abrasive article of claim 15 , wherein the abrasive layer has a graphic image permanently imparted thereon and sandwiched between the abrasive layer and the supersize coat.

17. The abrasive article of claim 16 , wherein the graphic image is grit size.

18. The abrasive article of claim 15 , wherein the abrasive layer comprises a particulate mixture comprising, based on the overall weight of the particulate mixture:
about 0 wt. % to less than 10 wt. % formed abrasive particles having a substantially monodisperse particle size of from about 80 micrometers to about 120 micrometers; and
about greater than 90 wt. % to about 99 wt. % diluent abrasive particles having a median particle size of from about 50 micrometers to about 250 micrometers.

19. The abrasive article of claim 18 , wherein the formed abrasive particles are precision-shaped grain mineral particles.

20. The abrasive article of claim 18 , wherein the particulate mixture comprises about 1 wt. % to about 5 wt. % formed abrasive particles.

21. A supersize coat, comprising
a metal salt of a (C 12 -C 22 ) long-chain fatty acid; and
a styrene-acrylic polymer binder, wherein the styrene-acrylic polymer binder is an ammonium salt of the styrene-acrylic polymer binder, wherein the ammonium salt of the styrene-acrylic polymer binder has a weight average molecular weight (Mw) of at least 200,000 g/mol.

22. The supersize coat of claim 21 , wherein the styrene-acrylic polymer binder has a T g of about 98 degrees Celsius.

Assignees

• 3M Innovative Properties Co

Inventors

• Gorgan Adriana C
• Jacob Ceni
• Migchels Joseph J
• Yang Yugeun P

Classifications

• B24D3/004

  with special coatings · CPC title

• B24D11/02

  Backings, e.g. foils, webs, mesh fabrics · CPC title

• C09K3/1436

  Composite particles, e.g. coated particles · CPC title

• C09K3/1409

  Abrasive particles per se (preparation of diamond C01B32/25) · CPC title

• B24D3/28

  Resins {or natural or synthetic macromolecular compounds (B24D3/22 takes precedence)} · CPC title