Imide cross-linked binders for abrasive articles

Patent metadata

Field	Value
Publication number	US-8992643-B2
Application number	US-201113341892-A
Country	US
Kind code	B2
Filing date	Dec 30, 2011
Priority date	Dec 30, 2010
Publication date	Mar 31, 2015
Grant date	Mar 31, 2015

Abstract

An abrasive article includes a fibrous substrate, a binder disposed on the fibrous substrate, and abrasive grains in contact with the binder. The binder includes an imide cross-linked urethane derived from a blocked isocyanate component and an anhydride component.

First claim

What is claimed is:

1. An abrasive article comprising:
a fibrous substrate;
a binder disposed on the fibrous substrate, the binder comprising an imide cross-linked urethane component; and
abrasive grains in contact with the binder,
wherein the imide cross-linked urethane component is derived from a blocked isocyanate component and an anhydride component, and
wherein the anyhydride component is a maleic anhydride modified polymer.

2. The abrasive article of claim 1 , wherein the blocked isocyanate component comprises an oxime group, an imidazole group, or a combination thereof.

3. The abrasive article of claim 2 , wherein the blocked isocyanate component comprises a polyether block.

4. The abrasive article of claim 2 , wherein the blocked isocyanate component comprises a polyester-ether block.

5. The abrasive article of claim 2 , wherein the maleic anhydride modified polymer includes a styrenic polymer, a polyolefin, a diene elastomer, a vinyl ether polymer, an ethylene-vinyl acetate copolymer, an acrylic polymer, a polyether, a polyester, silicone, or any combination thereof.

6. The abrasive article of claim 1 , wherein the binder further comprising a viscosity modifier.

7. The abrasive article of claim 1 , wherein the binder further comprising a suspending agent.

8. The abrasive article of claim 1 , wherein the fibrous substrate is a non-woven substrate.

9. The abrasive article of claim 1 , wherein the fibrous substrate includes fibers bound by a second binder.

10. The abrasive article of claim 9 , wherein the second binder includes an acrylic, polyurethane, a vinyl acetate, or any combination thereof.

11. The abrasive article of claim 1 , wherein the binder has a Knoop hardness in a range of 20 kg f /mm 2 to 80 kg f /mm 2 .

12. An abrasive article comprising:
a non-woven fibrous material including fibers secured together with a first binder;
abrasive grains disposed on the non-woven fibrous material and secured to the non-woven fibrous material with a second binder; and
the second binder comprising an imide cross-linked urethane component derived from a blocked isocyanate component and an anhydride component,
wherein the anhydride component is maleic anhydride modified polymer.

13. A method of forming an abrasive article, the method comprising:
dispensing a substrate including non-woven fibrous material;
coating the non-woven fibrous material with a binder formulation, the binder formulation including a blocked isocyanate component and an anhydride crosslinking agent, wherein the anhydride crosslinking agent comprises a maleic anhydride modified polymer;
depositing abrasive grains to contact the binder formulation; and
curing the binder formulation to form an imide crosslinked urethane binder.

14. The method of claim 13 , further comprising forming a slurry including the binder formulation and the abrasive grains, wherein coating and depositing occur simultaneously by coating the non-woven fibrous material with the slurry.

15. The method of claim 13 , wherein coating occurs prior to depositing.

16. The method of claim 13 further comprising shaping an abrasive article from the substrate after curing the binder formulation.

17. The method of claim 13 , further comprising forming the substrate by randomly depositing fibrous material and coating the fibrous material with a second binder.

18. The method of claim 13 , further comprising coating a second binder formulation over the deposited abrasive grains and curing the second binder formulation.

19. The method of claim 18 , wherein the second binder formulation includes a blocked isocyanate component and an anhydride crosslinking agent.

Assignees

• Herbert Charles G
• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Herbert Charles G

Classifications

• B24D11/00

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

• B24D18/00

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

• B24D3/28 Primary

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

• C08G18/622

  Polymers of esters of alpha-beta ethylenically unsaturated carboxylic acids · CPC title

• C09D175/04

  Polyurethanes · CPC title