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Details for Patent: 5,391,210

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Details for Patent: 5,391,210

Title: Abrasive article
Abstract:Abrasive articles comprising a plurality of abrasive grits and a cured ceramer. The cured ceramer is formed from a liquid dispersion comprising a dispersing liquid and non-aggregated colloidal metal oxide particles dispersed in the dispersing liquid, wherein the dispersing liquid comprises a free-radically polymerizable composition.
Inventor(s): Bilkadi; Zayn (Mahtomedi, MN), Klun; Thomas P. (Lakeland, MN)
Assignee: Minnesota Mining and Manufacturing Company (St. Paul, MN)
Filing Date:Dec 16, 1993
Application Number:08/168,655
Claims:1. An abrasive article comprising a plurality of abrasive grits and a binder comprising a cured ceramer, said ceramer comprising non-aggregated colloidal metal oxide particles provided as a sol and dispersed in a free-radically polymerizable composition.

2. The abrasive article of claim 1, wherein said colloidal metal oxide particles have an average particle size of from about 5 to about 1000 nanometers.

3. The abrasive article of claim 1, wherein said colloidal metal oxide particles have an average particle size of from about 10 to about 100 nanometers.

4. The abrasive of claim 1, wherein said ceramer further includes a coupling agent.

5. The abrasive of claim 4, wherein said colloidal metal oxide particles of said ceramer are functionalized by said coupling agent.

6. The abrasive of claim 4, wherein said coupling agent is a hydrolyzable silane.

7. The abrasive article of claim 1, wherein said polymerizable composition comprises a free-radically curable monomer having the formula: ##STR2## wherein R.sup.1 represents a member selected from the group consisting of hydrogen, halogen, and lower alkyl group; X represents a member selected from the group consisting of oxygen and --NR.sup.2, wherein R.sup.2 represents hydrogen or lower alkyl group; R.sup.3 represents a polyvalent organic group having a molecular weight of 14 to 1000 and a valence of m+n; m represents an integer designating the number of acrylic or methacrylic groups or both in the ester or amide; n represents an integer having a value of 1 to 5; and Y represents a member selected from the group consisting of hydrogen, lower alkyl group, and protic functional group.

8. The abrasive article of claim 1, wherein said polymerizable composition comprises a member selected from the group consisting of acrylated urethanes, acrylated epoxies, aminoplast derivatives having pendant unsaturated carbonyl groups, isocyanurate derivatives having at least one pendant acrylate group, isocyanate derivatives having at least one pendant acrylate group, epoxy resins other than acrylated epoxies, ethylenically unsaturated compounds other than acrylated urethanes, acrylated epoxies, acrylated isocyanates, or acrylated isocyanurates, and mixtures and combinations thereof.

9. The abrasive article of claim 1, wherein said abrasive grits are selected from the group consisting of aluminum oxide, alumina zirconia, silicon carbide, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.

10. The abrasive of claim 1, wherein said ceramer further includes an additive selected from the group consisting of fillers, grinding aids, fibers, lubricants, antistatic agents, wetting agents, surfactants, pigments, dyes, plasticizers, and suspending agents.

11. The abrasive of claim 1, wherein said ceramer further includes a member selected from the group consisting of photoinitiators and photosensitizers.

12. The abrasive of claim 1, wherein said ceramer is substantially free of water.

13. The abrasive article of claim 1, wherein said article is selected from the group consisting of bonded abrasive articles, coated abrasive articles, and nonwoven abrasive articles.

14. A coated abrasive article comprising:

a. a backing;

b. abrasive grits;

c. a make coat that secures the abrasive grits to said backing;

d. a size coat overlying said abrasive and said make coat, wherein at least one of said make or said size coat comprises a cured ceramer said ceramer comprising non-aggregated colloidal metal oxide particles provided as a sol and dispersed in a free-radically polymerizable composition.

15. The coated abrasive article of claim 14, wherein said ceramer further includes a coupling agent.

16. The coated abrasive of claim 15, wherein said colloidal metal oxide particles of said ceramer are functionalized by said coupling agent.

17. The coated abrasive article of claim 15, wherein said coupling agent is a hydrolyzable silane.

18. The coated abrasive of claim 14, wherein said backing is selected from the group consisting of polymeric film, primed polymeric film, cloth, paper, vulcanized fiber, nonwoven substrates, treated nonwoven substrates, and combinations thereof.

19. The coated abrasive article of claim 14, wherein said abrasive particles are selected from the group consisting of aluminum oxide, alumina zirconia, silicon carbide, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.

20. The coated abrasive article of claim 14, wherein at least one of said make coat or said size coat comprises an additive selected from the group consisting of fillers, grinding aids, fibers, lubricants, antistatic agents, wetting agents, surfactants, pigments, dyes, plasticizers, and suspending agents.

21. A coated abrasive article comprising a backing having a plurality of precisely shaped abrasive composites bonded to said backing, wherein said abrasive composites comprise a plurality of abrasive grits and cured ceramer said ceramer comprising non-aggregated colloidal metal oxide particles provided as a sol and dispersed in a free-radically polymerizable composition.

22. The coated abrasive article of claim 21, wherein said ceramer further includes a coupling agent.

23. The coated abrasive of claim 22, wherein said colloidal metal oxide particles of said ceramer are functionalized by said coupling agent.

24. The coated abrasive article of claim 22, wherein said coupling agent is a hydrolyzable silane.

25. The coated abrasive of claim 21, wherein said backing is selected from the group consisting of: polymeric film, primed polymeric film, cloth, paper, vulcanized fiber, nonwoven substrates, treated nonwoven substrates and combinations thereof.

26. The coated abrasive article of claim 21, wherein said abrasive grits are selected from the group consisting of aluminum oxide, alumina zirconia, silicon carbide, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.

27. The coated abrasive article of claim 21, wherein said abrasive composite comprises an additive selected from the group consisting of fillers, grinding aids, fibers, lubricants, antistatic agents, wetting agents, surfactants, pigments, dyes, plasticizers, and suspending agents.

28. A coated abrasive article comprising a backing bearing on at least one major surface thereof a layer comprising a plurality of abrasive grits and a binder comprising a cured ceramer said ceramer comprising non-aggregated colloidal metal oxide particles provided as a sol and dispersed in a free-radically polymerizable composition.

29. The coated abrasive article of claim 28, wherein said ceramer further includes a coupling agent.

30. The coated abrasive of claim 29, wherein said colloidal metal oxide particles of said ceramer are functionalized by a coupling agent.

31. The coated abrasive article of claim 29, wherein said coupling agent is a hydrolyzable silane.

32. The coated abrasive article of claim 28, wherein said backing is selected from the group consisting of: polymeric film, primed polymeric film, cloth, paper, vulcanized fiber, nonwoven substrates, treated nonwoven substrates and combinations thereof.

33. The coated abrasive article of claim 28, wherein said abrasive grits are selected from the group consisting of aluminum oxide, alumina zirconia, silicon carbide, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.

34. The coated abrasive article of claim 28, wherein said abrasive composite comprises an additive selected from the group consisting of fillers, grinding aids, fibers, lubricants, antistatic agents, wetting agents, surfactants, pigments, dyes, plasticizers, and suspending agents.
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