# US 10,245,708 B2 · Method of making an abrasive article and abrasive article

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- Number: US 10,245,708 B2
- Document ID: US10245708B2
- Status: Granted
- Kind: B2
- Application number: 15/502,942
- Filed: 2015-08-05
- Published: 2017-08-10
- Granted: 2019-04-02
- Earliest claimed: 2014-08-27
- Assignees: 3M Innovative Properties Company
- Applicants: 3M Innovative Properties Company
- Inventors: Jacob S. Beveridge; Steven J. Keipert
- Web page: https://patentgrep.com/patent/US10245708B2

## CPC

- B24D 18/0027: {by impregnation}
- B24D 3/02: the constituent being used as bonding agent
- B24D 3/20: and being essentially organic
- B24D 3/32: for porous or cellular structure
- B24D 5/04: with reinforcing means
- 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)

## Abstract

A method of making an abrasive article comprises urging a malleable thermosetting melt-flowable composition through openings extending through a porous abrasive member to form an abrasive article precursor; which is heated to form the abrasive article. Multiple abrasive articles may be stacked prior to heating. Methods can be used to fabricate abrasive articles such as grinding wheels and cut-off wheels.

## Claims

### Claim 1

A method of making an abrasive article, the method comprising steps:
a) providing a porous abrasive member having first and second opposed major surfaces, wherein openings extending through the porous abrasive member from the first major surface to the second major surface, wherein the porous abrasive member comprises abrasive particles secured to a porous substrate by at least one binder material;
b) urging a malleable thermosetting melt-flowable composition through the openings in the porous abrasive member to form an abrasive article precursor, wherein the malleable melt-flowable composition comprises novolac phenolic resin and furfuryl alcohol; and
c) heating the abrasive article precursor to form the abrasive article, wherein the abrasive article comprises first and second opposed major surfaces, and wherein both of the first and second major surfaces comprise a cross-linked reaction product of the malleable thermosetting melt-flowable composition.

### Claim 2 (depends on 1)

The method of claim 1, wherein the at least one binder material comprises a make layer and a size layer.

### Claim 3 (depends on 1)

The method of claim 1, wherein the substrate comprises a woven scrim.

### Claim 4 (depends on 1)

The method of claim 1, wherein the substrate comprises a lofty open nonwoven fiber web.

### Claim 5 (depends on 1)

The method of claim 1, wherein step b) comprises disposing the malleable thermosetting melt-flowable composition against the first major surface of the abrasive member and passing the malleable thermosetting melt-flowable composition and the abrasive member between a pair of nip rolls.

### Claim 6

A method of making an abrasive article, the method comprising steps:
i) providing a plurality of abrasive article precursors, wherein each abrasive article precursor is respectively prepared by a method comprising steps:
a) providing a porous abrasive member having first and second opposed major surfaces, wherein openings extending through the porous abrasive member from the first major surface to the second major surface, wherein the porous abrasive member comprises abrasive particles secured to a porous substrate by at least one binder material; and
b) urging a malleable thermosetting melt-flowable composition through the openings in the porous abrasive member to form an abrasive article precursor, wherein the malleable melt-flowable composition comprises novolac phenolic resin and furfuryl alcohol; and
ii) stacking the plurality of abrasive article precursors optionally with one or more reinforcing scrims disposed adjacent to each one of the abrasive article precursors to provide a abrasive article precursor stack; and
iii)) heating the abrasive article precursor stack to form the abrasive article, wherein the abrasive article comprises first and second opposed major surfaces, and wherein both of the first and second major surfaces comprise a cross-linked reaction product of the malleable thermosetting melt-flowable composition.

### Claim 7 (depends on 6)

The method of claim 6, wherein step iii) is carried out while the abrasive article precursor stack is under compression.

### Claim 8 (depends on 6)

The method of claim 6, wherein the at least one binder material comprises a make layer and a size layer.

### Claim 9 (depends on 6)

The method of claim 6, wherein the substrate comprises a woven fiber scrim or wire mesh.

### Claim 10 (depends on 6)

The method of claim 6, wherein the substrate comprises a lofty open nonwoven fiber web.

### Claim 11 (depends on 6)

The method of claim 6, wherein step b) comprises disposing the malleable thermosetting melt-flowable composition against the first major surface of the abrasive member and passing the malleable thermosetting melt-flowable composition and the abrasive member between a pair of nip rolls.