# US 5,344,688 A · Coated abrasive article and a method of making same

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- Number: US 5,344,688 A
- Document ID: US5344688A
- Status: Granted
- Kind: A
- Application number: 07/932,073
- Filed: 1992-08-19
- Granted: 1994-09-06
- Earliest claimed: 1992-08-19
- Assignees: Minnesota Mining and Manufacturing Company
- Inventors: Jeffrey S. Peterson; Donald L. Oseth
- Web page: https://patentgrep.com/patent/US5344688A

## CPC

- B24D 11/02: Backings, e.g. foils, webs, mesh fabrics
- B24D 3/28: Resins {or natural or synthetic macromolecular compounds (B24D3/22 takes precedence)}
- Y10T 428/24033: including stitching and discrete fastener[s], coating or bond
- Y10T 442/2082: At least one coating or impregnation functions to fix pigments or particles on the surface of a coating or impregnation
- Y10T 442/2115: At least one coating or impregnation functions to fix pigments or particles on the surface of a coating or impregnation
- B24D: TOOLS FOR GRINDING, BUFFING OR SHARPENING (abrading-bodies specially designed for tumbling apparatus, e.g. abrading-balls B24B31/14; honing tools B24B33/08; lapping tools B24B37/11)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A coated abrasive article comprising (a) a porous backing having a front side and a back side; (b) in direct contact with the porous backing, a make coat formed from a composition comprising a radiation curable adhesive applied over the front side of the backing; (c) a multiplicity of abrasive grits bonded by the make coat to the front side of the backing; and (d) a size coat overlying both the abrasive grits and the make coat. The invention also involves several methods for preparing the coated abrasive article. In all of these methods, a radiation curable make coat precursor is applied directly to the front side of the porous backing. No treatment coat is required to seal the backing prior to application of the make coat precursor.

## Claims

### Claim 1

A coated abrasive article comprising a porous backing having a front side and a back side, said front side having directly adhered thereto a make coat comprising a cured radiation curable adhesive, a multiplicity of abrasive grits bonded by said make coat to the front side of said backing, and a size coat overlying said abrasive grits and said made coat, wherein said make coat further comprises a cured latex resin.

### Claim 2 (depends on 1)

The article of claim 1 wherein said make coat seals said backing.

### Claim 3 (depends on 1)

The article of claim 1 wherein said backing is free of a presize coat.

### Claim 4 (depends on 1)

The article of claim 1 wherein said backing is made of cloth.

### Claim 5 (depends on 4)

The article of claim 4 wherein said cloth is made from fibers selected from the group consisting of cellulosics, cottons, polyesters, polyamides, and blends of at least one polyester and at least one cotton.

### Claim 6 (depends on 1)

The article of claim 1 wherein said backing further includes a backsize coat.

### Claim 7 (depends on 1)

The article of claim 1 wherein said radiation curable adhesive is a member selected from the group consisting of acrylated urethanes, acrylated epoxies, acrylated polyesters, 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, and mixtures and combinations of the foregoing.

### Claim 8 (depends on 1)

The article of claim 1 wherein the ratio by weight of said radiation curable adhesive to said latex resin ranges from about 90:10 to about 10:90.

### Claim 9 (depends on 1)

The article of claim 1 wherein said radiation curable adhesive is an ethylenically unsaturated compound.