Claims
- 1. A coated abrasive article comprising:
- (1) a backing;
- (2) a make coat layer, wherein the make coat layer is a pressure sensitive adhesive and comprises the polymerized product of:
- (a) at least one ethylenically unsaturated monomer;
- (b) at least one cationically polymerizable monomer;
- (c) a catalytically effective amount of a curing agent comprising:
- (i) at least one organometallic complex salt, and
- (ii) at least one thermally decomposable ester reaction product of a tertiary alcohol and an acid that forms a chelation complex with a metal ion of the organometallic complex salt;
- (d) optionally, a peroxide; and
- (3) a layer of a plurality of abrasive grains; and
- (4) a size coat layer.
- 2. The coated abrasive article according to claim 1 wherein the cationically polymerizable monomer is selected from the group consisting of diglycidyl ether of bisphenol A, bisphenol A epoxy resin, 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate, and bis-(3,4-epoxy-6-methylcyclohexylmethyl)adipate.
- 3. The coated abrasive article according to claim 1 wherein the ethylenically unsaturated monomer is selected from the group consisting of monofunctional or polyfunctional (meth)acrylates, (meth)acrylamides, and vinyl compounds.
- 4. The coated abrasive article according to claim 3 wherein the ethylenically unsaturated monomer is selected from the group consisting of isooctyl acrylate, 1,6-hexanediol diacrylate, butyl acrylate, and tetrahydrofurfuryl acrylate.
- 5. The coated abrasive article according to claim 4 wherein the organometallic complex salt is represented by the following formula:
- [(L.sup.1)(L.sup.2)M.sup.p ].sup.+q Y.sub.n
- wherein
- M.sup.p represents a metal selected from the group consisting of Cr, Mo, W, Mn Re, Fe, and Co;
- L.sup.1 represents 1 or 2 ligands contributing pi-electrons that can be the same or different ligand selected from the group of: substituted and unsubstituted eta.sup.3 -allyl, eta.sup.5 -cyclopentadienyl, and eta.sup.7 -cycloheptatrienyl, and eta.sup.6 -aromatic compounds selected from eta.sup.6 -benzene and substituted eta.sup.6 -benzene compounds and compounds having 2 to 4 fused rings, each capable of contributing 3 to 8 pi-electrons to the valence shell of M.sup.p ;
- L.sup.2 represents none, or 1 to 3 ligands contributing an even number of sigma-electrons that can be the same or different ligand selected from the group of: carbon monoxide, nitrosonium, triphenyl phosphine, triphenyl stibine and derivatives of phosphorus, arsenic and antimony, with the proviso that the total electronic charge contributed to M.sup.p results in a net residual positive charge of q to the complex;
- q is an integer having a value of 1 or 2, the residual charge of the complex cation;
- Y is a halogen-containing complex anion selected from BF.sub.4.sup.-, AsF.sub.6.sup.-, PF.sub.6.sup.-, SbF.sub.5 OH.sup.-, SbF.sub.6.sup.-, and CF.sub.3 SO.sub.3.sup.- ; and
- n is an integer having a value of 1 or 2, the number of complex anions required to neutralize the charge q on the complex cation.
- 6. The coated abrasive article according to claim 5 wherein the thermally decomposable ester reaction product of a tertiary alcohol and an acid is selected from the group consisting of oxalic, phosphorous, and phosphoric acid.
- 7. The coated abrasive article according to claim 6 wherein the make coat layer comprises isooctyl acrylate, 1,6-hexanediol acrylate, bisphenol A epoxy resin, 2,2-dimethoxy-1,2-diphenyl-1-ethanone, eta.sup.6 -(xylenes(mixed isomers))-eta.sup.5 -cyclopentadienyliron (1+) hexafluoroanintomate, and di-t-butyl oxalate.
- 8. The coated abrasive article according to claim 7 wherein the size coat layer comprises 1,6-hexanediol acrylate, 3,4-epoxycyclohexylmethyl 3,4-epoxycyclohexanecarboxylate, eta.sup.6 -(xylenes(mixed isomers))-eta.sup.5 -cyclopentadienyliron (1+) hexafluoroanintomate, and 2,2-dimethoxy-1,2-diphenyl-1-ethanone.
- 9. A coated abrasive article comprising:
- (1) a backing;
- (2) a make coat layer, wherein the make coat layer is a pressure sensitive adhesive and comprises the polymerized product of:
- (a) at least one ethylenically unsaturated monomer;
- (b) a polyurethane precursor, wherein when cured, the polyurethane has a glass transition temperature above room temperature;
- (c) a catalytically effective amount of a polyurethane precursor initiator;
- (3) a layer of a plurality of abrasive grains; and
- (4) a size coat layer.
- 10. The coated abrasive article according to claim 9 wherein the polyurethane precursor is a mixture of one or more monomers including polyisocyanates and one or more polyol, or monomers bearing at least two isocyanate-reactive hydrogen atoms and such that the ratio of isocyanate groups to isocyante-reactive hydrogens atoms is 1:2 to 2:1.
- 11. The coated abrasive article according to claim 10 wherein the polyurethane precursor comprises (1) a polyisocyanate, wherein the polyisocyanate is a biuret of 1,6-hexamethylene diisocyanate, or isophorone diisocyanate, or a mixture thereof, and (2) a polyol, wherein the polyol is hydroxyethylated bisphenol A.
- 12. The coated abrasive article according to claim 9 wherein the ethylenically unsaturated monomer is selected from the group consisting of monofunctional or polyfunctional (meth)acrylates, (meth)acrylamides, and vinyl compounds.
- 13. The coated abrasive article according to claim 12 wherein the ethylenically unsaturated monomer is selected from the group consisting of isooctyl acrylate, N-vinyl pyrrolidone, N,N-dimethylacrylamide, 1,6-hexanediol diacrylate, butyl acrylate, and tetrahydrofurfuryl acrylate.
Parent Case Info
This is a continuation of application Ser. No. 07/823,762 filed Jan. 22, 1992, now U.S. Pat. No. 5,256,170.
US Referenced Citations (20)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0306161A2 |
Aug 1989 |
EPX |
Continuations (1)
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Number |
Date |
Country |
Parent |
823762 |
Jan 1992 |
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