Coated abrasive article

• US 6,372,336 B1
• Filed: 05/03/2000
• Issued: 04/16/2002
• Est. Priority Date: 05/01/1998
• Status: Active Grant

• Current Assignee: 3M Innovative Properties Company (3M Company)
• Original Assignee: 3M Innovative Properties Company (3M Company)
• Inventors: Masmar, Craig A., DeVoe, Robert J., Dahlke, Gregg D., Clausen, Thomas M.
• Primary Examiner(s): Kelly, Cynthia H.
• Assistant Examiner(s): GARRETT, DAWN L
• Application Number:
  US09/563,372
• Time in Patent Office: 713 Days
• Field of Search: 512/98, 512/95, 513/09, 428/323, 428/327, 428/343, 428/345, 428/355.R, 428/413, 525/108, 430/913, 430/914
• US Class Current: 428/323
• CPC Class Codes: B24D 18/00 Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
• CPC Class Codes: B24D 3/28 Resins or natural or synthetic macromolecular compounds B24D3/22 takes precedence
• CPC Class Codes: C08G 59/68 characterised by the catalysts used
• CPC Class Codes: C08L 2666/04 Macromolecular compounds according to groups C08L7/00 - C08L49/00, or C08L55/00 - C08L57/00; Derivatives thereof
• CPC Class Codes: C09D 163/00 Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
• CPC Class Codes: Y10S 430/114 Initiator containing
• CPC Class Codes: Y10S 430/115 Cationic or anionic
• CPC Class Codes: Y10T 428/1452 Polymer derived only from ethylenically unsaturated monomer
• CPC Class Codes: Y10T 428/25 Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
• CPC Class Codes: Y10T 428/254 Polymeric or resinous material
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2809 including irradiated or wave energy treated component
• CPC Class Codes: Y10T 428/2852 Adhesive compositions
• CPC Class Codes: Y10T 428/31511 Of epoxy ether

Abstract

A coated abrasive article comprises a backing, a first binder on the backing, and a plurality of abrasive particles in the first binder. The first binder precursor is an energy-curable preferably, melt-processable resin containing an epoxy resin, an ethylene-vinyl acetate copolymer, and a curing agent for crosslinking the epoxy resin that is cured to provide a crosslinked make coating. The above binder precursors of the invention are preferably free of homopolymers and copolymers of olefinic monomers. In another aspect, the invention also describes an energy curable first binder precursor containing an epoxy resin, an ethylene-vinyl acetate copolymer, a polyfunctional acrylate component and a curing agent for crosslinking the epoxy resin that is cured to provide a crosslinked make coating. The invention also relates to a method of producing such coated abrasive articles and a surface-treated backing material.

Claims

1. A presized backing for a coated abrasive article comprising:

a) a backing suitable for use in a coated abrasive article; and

b) a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition and free of hydrocarbon polyolefin resins comprising;

i) from about 30 to about 95 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) from about 5 to about 70 weight percent an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content, and

iii) an effective amount of a curing agent for crosslinking said epoxy resin.

3. The presized backing according to claim 1, wherein the ethylene-vinyl acetate copolymer resin comprises from about 40 to 95% vinyl acetate.

4. The presized backing according to claim 3, wherein the ethylene-vinyl acetate copolymer resin comprises from about 50 to 90% vinyl acetate.

5. The presized backing according to claim 4, wherein the ethylene-vinyl acetate copolymer resin comprises from about 60 to 80% vinyl acetate.

2. A presized backing for a coated abrasive article comprising:

a) a backing suitable for use in a coated abrasive article; and

b) a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition and free of hydrocarbon polyolefin resins comprising;

i) about 2 to about 98 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) about 1 to about 90 weight percent of an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content,

iii) about 0.1 to about 20 weight percent of a polyfunctional acrylate component, the weight percent being based on the total resin content, and

iv) an effective amount of a curing agent for crosslinking said epoxy resin.

6. A coated abrasive article having a presized backing comprising:

a) a backing suitable for use in a coated abrasive article; and

b) a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition comprising;

i) from about 30 to about 95 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) from about 5 to about 70 weight percent an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content, and

iii) an effective amount of a curing agent for crosslinking said epoxy resin.

7. A coated abrasive article having a presized backing comprising:

a) a backing suitable for use in a coated abrasive article; and

b) a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition comprising;

i) about 2 to about 98 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) about 1 to about 90 weight percent an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content,

iii) about 0.1 to about 20 weight percent of a polyfunctional acrylate component, the weight percent being based on the total resin content, and

iv) an effective amount of a curing agent for crosslinking said epoxy resin.

8. A method of making a coated abrasive article comprising:

(a) providing a backing having a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition comprising;

i) from about 30 to about 95 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) from about 5 to about 70 weight percent an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content, and

iii) an effective amount of a curing agent for crosslinking said epoxy resin.

9. A method of making a coated abrasive article comprising:

a) providing a backing having a crosslinked presize layer on the backing formed from a presize binder precursor, wherein the presize binder precursor is an energy curable composition comprising;

i) about 2 to about 98 weight percent of an epoxy resin, the weight percent being based on the total resin content,

ii) about 1 to about 90 weight percent an ethylene-vinyl acetate copolymer resin, the weight percent being based on the total resin content,

iii) about 0.1 to about 20 weight percent of a polyfunctional acrylate component, the weight percent being based on the total resin content, and

iv) an effective amount of a curing agent for crosslinking said epoxy resin.