Smear-free nonwoven composite abrasives

Patent metadata

Field	Value
Publication number	US-9840648-B2
Application number	US-97664310-A
Country	US
Kind code	B2
Filing date	Dec 22, 2010
Priority date	Dec 29, 2009
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A surface-treating article includes an organic matrix substantially engulfed by a binder that includes a reaction product of a blocked polyurethane prepolymer and a mixture of aromatic amines. The aromatic amines include polymethylene polyaniline having a functionality equal to or greater than 4.

First claim

What is claimed is:

1. A non-woven abrasive article comprising:
an organic matrix comprising a non-woven lofty polymer fiber web;
abrasive particles; and
a binder,
wherein the abrasive particles are disposed in the binder,
wherein the non-woven lofty polymer fiber web is substantially engulfed by the binder, wherein the hinder includes a reaction product of an end blocked polyurethane prepolymer and a mixture of aromatic amines, wherein the end blocked polyurethane prepolymer includes:
methyl ethyl ketoxime, toluene diisocyanate, and poly butyl glycol ether; or methyl ethyl ketoxime, methylene diphenyl diisocyanate, and poly butyl glycol ether,
wherein the aromatic amines include polymethylene polyanilines having a functionality equal to or greater than 4, and wherein the polymethylene polyanilines includes at least one compound having the formula:

2. The non-woven abrasive article of claim 1 , wherein the weight ratio of blocked polyurethane prepolymer to aromatic amines is in a range of between about 9.1:1 and about 10.1:1.

3. The non-woven abrasive article of claim 1 , wherein the aromatic amine includes at least one compound selected from the formula:

4. The non-woven abrasive article of claim 1 , further including at least one lubricant of the group consisting of talc, kaolin, a metallic stearate and tetrafluoroethylene powder.

5. The non-woven abrasive article of claim 4 , wherein the metallic stearate is at least one member selected from the group consisting of zinc stearate, calcium stearate and lithium stearate.

6. The non-woven abrasive article of claim 5 , wherein the amount of lubricant in the binder is in a range of between about 7% and about 10% by weight of the binder.

7. The non-woven abrasive article of claim 1 , wherein the surface-treating article is a unitized abrasive wheel or a convolute wheel.

8. A method of forming a non-woven abrasive article comprising the steps of:
a) combining an end blocked polyurethane prepolymer and a mixture of aromatic amines, wherein the blocked polyurethane prepolymer includes: methyl ethyl ketoxime, toluene diisocyanate, and poly butyl glycol ether; or methyl ethyl ketoxime, methylene diphenyl diisocyanate, and poly butyl glycol ether, and wherein the aromatic amines include polymethylene polyanilines having a functionality equal to or greater than 4, and wherein the polymethylene polyanilines include at least one compound having the formula:

where n≧2, to thereby form a binder precursor;

b) combining the binder precursor with an organic matrix comprising a non-woven lofty polymer fiber web;
c) combining the binder precursor and organic matrix with abrasive particles; and
d) curing the binder precursor to thereby form the abrasive article.

9. The method of claim 8 , wherein the weight ratio of blocked polyurethane prepolymer to aromatic amines is in a range of between about 9:1 and about 10:1.

10. The method of claim 8 , wherein the aromatic amine includes at least one compound selected from the formula:

11. The method of claim 10 , further including at least one lubricant of the group consisting of talc, kaolin, a metallic stearate and tetrafluoroethylene.

12. The method of claim 11 , wherein the metallic stearate is at least one member selected from the group consisting of zinc stearate, calcium stearate and lithium stearate.

13. The method of claim 12 , wherein the amount of lubricant in the binder is in a range of between about 7% and about 10% by weight of the binder.

14. A method of abrading a workpiece, comprising the step of applying to the workpiece the non-woven abrasive article of claim 1 .

Assignees

• Hsu Shyiguei
• Gomez Alejandro
• Herbert Charles G
• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Hsu Shyiguei
• Gomez Alejandro
• Herbert Charles G

Classifications

• C09K3/14 Primary

  Anti-slip materials; Abrasives {(products specifically intended for the fabrication of abrasive tools, blocks or papers, or for operations of the kind of sand-blasting and barrelling B24B31/14, B24C1/00; polishing compositions containing abrasive or grinding agents C09G1/02; friction compositions for brakes or clutches F16D69/02; polishing of semi-conductors H10P52/40)} · CPC title

• C08J5/00 Primary

  Manufacture of articles or shaped materials containing macromolecular substances (manufacture of semi-permeable membranes B01D67/00 - B01D71/00) · CPC title