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1. WO2007002711 - COMPOSITION, TREATED BACKING, AND ABRASIVE ARTICLES CONTAINING THE SAME

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

What is claimed is:

1. A curable composition comprising, based on the total weight of components a) through f):
a) from 20 to 65 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
b) from 29 to 75 percent by weight of polyfunctional urethane (meth)acrylate; c) from 0.1 to 15 percent by weight of novolac resin;
d) dicyandiamide;
e) photoinitiator; and
f) optional epoxy cure catalyst.

2. A curable composition according to claim 1, further comprising from 1 to 10 percent by weight of non-urethane polyfunctional (meth)acrylate, based on the total weight of components a) through f).

3. A curable composition according to claim 1 , wherein the curable composition is essentially free of dissolved thermoplastic polymer.

4. A treated backing comprising a fabric having a composition contacting at least a portion thereof, wherein, based on the total weight of components a) through f), the composition comprises a reaction product of components comprising:
a) from 20 to 65 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
b) from 29 to 75 percent by weight of polyfunctional urethane (meth)acrylate; c) from 0.1 to 15 percent by weight of novolac resin;
d) dicyandiamide;
e) photoinitiator; and
f) optional epoxy cure catalyst.

5. A treated backing according to claim 4, wherein the composition is essentially free of dissolved thermoplastic polymer.

6. A treated backing according to claim 4, wherein the fabric has first and second major surfaces, and wherein the composition contacts both major surfaces.

7. A treated backing according to claim 4, wherein the treated backing has first and second major surfaces, and wherein the composition contacts only one major surface.

8. A treated backing according to claim 4, wherein the backing comprises fabric that has a basis weight in a range of from 200 to 270 grams per square meter.

9. A method of making a treated backing comprising:
contacting at least a portion of a fabric with a curable composition, based on the total weight of components a) through f), preparable from components comprising:
a) from 20 to 65 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
b) from 29 to 75 percent by weight of polyfunctional urethane (meth)acrylate; c) from 0.1 to 15 percent by weight of novolac resin;
d) dicyandiamide;
e) photoinitiator; and
f) optional epoxy cure catalyst; and
at least partially curing the composition.

10. A method according to claim 9, wherein the curable composition is essentially free of dissolved thermoplastic polymer.

11. A method according to claim 9, wherein the fabric has first and second major surfaces, and wherein the composition contacts both major surfaces.

12. A method according to claim 9, wherein the fabric has first and second major surfaces, and wherein the composition contacts only one major surface.

13. A method according to claim 9, wherein the backing comprises fabric that has a basis weight in a range of from 200 to 270 grams per square meter.

14. A coated abrasive article comprising a backing and an abrasive layer, further comprising at least one of a presize layer, a saturant, a subsize, a backsize layer, or a tie layer that comprising a binder that, based on the total weight of components a) through f), is a reaction product of components comprising:
a) from 20 to 65 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
b) from 29 to 75 percent by weight of polyfunctional urethane (meth)acrylate; c) from 0.1 to 15 percent by weight of novolac resin;
d) dicyandiamide;
e) photoinitiator; and
f) optional epoxy cure catalyst.

15. A coated abrasive article according to claim 14, wherein the binder is essentially free of dissolved thermoplastic polymer.

16. A coated abrasive article according to claim 14, wherein the abrasive layer comprises make and size layers and abrasive particles.

17. A coated abrasive article according to claim 16, wherein the backing comprises fabric that has a basis weight in a range of from 200 to 270 grams per square meter.

18. A coated abrasive article according to claim 16, further comprising a supersize.

19. A coated abrasive article according to claim 14, wherein the abrasive particles are dispersed in a binder.

20. A coated abrasive article according to claim 19, wherein the abrasive layer comprises abrasive composites.

21. A coated abrasive article according to claim 19, wherein the abrasive layer comprises precisely-shaped abrasive composites.

22. A method of abrading a workpiece comprising:
providing a coated abrasive article according to claim 14;
frictionally contacting at least a portion of the abrasive layer with at least a portion of a surface of the workpiece; and
moving at least one of the coated abrasive article or the workpiece relative to the other to abrade at least a portion of the surface.

23. A method of making a coated abrasive article comprising:
disposing a backing treatment precursor on at least a portion of a backing, the backing treatment precursor comprising, based on the total weight of components a) to f): a) from 20 to 65 percent by weight of epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F;
b) from 29 to 75 percent by weight of polyfunctional urethane (meth)acrylate; c) from 0.1 to 15 percent by weight of novolac resin;
d) dicyandiamide;
e) photoinitiator; and
f) optional epoxy cure catalyst;
at least partially polymerizing the backing treatment precursor;
disposing a slurry comprising polymerizable binder precursor and abrasive particles on the at least partially polymerized backing treatment precursor; and
at least partially polymerizing the binder precursor.

24. A method according to claim 23, wherein the backing is a treated backing having at least one treatment secured thereto selected from the group consisting of a presize, a backsize, a sub-size, and a saturant.

25. A method according to claim 23, further comprising providing a tool having a surface with a plurality of precisely-shaped cavities therein, and urging the slurry into at least a portion of the cavities.