US4927431A
Expired / Lapsed
US
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Binder for coated abrasives
Assignee: 3M Co
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Filing: 1988-09-08
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Granted: 1990-05-22
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Expires: 2008-09-08
Abstract
Abstract An abrasive product comprising abrasive grains bonded to at least one major surface of a backing sheet by a binder formed from a blend comprising radiation curable monomer and a thermally curable resinous material. The radiation curable monomer can be selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group, isocyanate derivatives having at least one terminal or pendant acrylate group, and multifunctional acrylate monomers. The thermally curable resinous material is preferably a member selected from the group consisting of phenolic resins, urea-formaldehyde resins, melamine-formaldehyde resins, and epoxy resins. The binder can be used to form the make coat, size coat, both make and size coats, or as a backing treatment for a coated abrasive product. The binder can also be used in fibrous nonwoven abrasive products. The binder can also be used in embodiments where only a single-coat binder is employed.
Inventors
- 👤 Scott Buchanan
- 👤 Eric G. Larson
- 👤 Jon R. Pieper
- 👤 Thomas E. Boettcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:37
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/34; B24D3/342; B24D3/344
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
110 words
An abrasive article comprising a backing and abrasive grains, wherein said abrasive grains are secured to at least one side of said backing by at least one binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group, and (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 2
Dependent Claim
110 words
An abrasive article comprising a backing and abrasive grains, wherein said abrasive grains are secured to at least one side of said backing by at least one binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group, and (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 3
Dependent Claim
14 words
The article of claim 1 wherein said phenolic resin is a resole phenolic resin.
Claim 4
Dependent Claim
40 words
The article of claim 1 wherein said isocyanurate derivative monomer is represented by the formula: ##STR6## where each R can be the same or different and represents a group containing at least one terminal or pendant acrylate or methacrylate group.
Claim 5
Dependent Claim
106 words
The article of claim 3 where R is selected from the group consisting of: ##STR7## where R 1 represents a divalent alkylene group, R 2 represents --H or --CH 3 , R 3 represents --H or --CH 3 , R 4 represents hydrogen, an alkyl group, or an arylalkyl group, R 5 represents hydrogen, an alkyl group, an or arylalkyl group, R 6 represents a divalent alkylene group, R 7 represents a covalent bond or a divalent alkylene group, a represents an integer from 1 to 3, inclusive, b represents 0 or 1, c represents 0 or 1, and a + b + c = 3.
Claim 6
Dependent Claim
125 words
The article of claim 1 wherein said acrylate monomer is represented by the formula: ##STR8## where A represents a divalent alkylene group, and can be the same or different, and R 8 represents: ##STR9## where R 1 represents a divalent alkylene group, R 2 represents --H or --CH 3 , R 3 represents --H or --CH 3 , R 4 represents hydrogen, an alkyl group, or an arylalkyl group, R 5 represents hydrogen, an alkyl group, an or arylalkyl group, R 6 represents a divalent alkylene group, R 7 represents a covalent bond or a divalent alkylene group, a represents an integer from 1 to 3, inclusive, b represents 0 or 1, c represents 0 or 1, and a + b + c = 3.
Claim 7
Dependent Claim
22 words
The article of claim 5 wherein said acrylate monomer is selected from the group consisting of trimethylol propane triacrylate and pentaerythritol triacrylate.
Claim 8
Dependent Claim
14 words
The article of claim 1 wherein said binder further comprises a thermal curing catalyst.
Claim 9
Dependent Claim
29 words
The article of claim 1 wherein said binder further comprises a member selected from the group consisting of fillers, coupling agents, surfactants, wetting agents, dyes, pigments, and grinding aids.
Claim 10
Dependent Claim
28 words
The article of claim 8 wherein said filler can be use in an amount up to 250 parts by weight per 100 parts by weight of said binder.
Claim 11
Dependent Claim
23 words
The article of claim 8 wherein said filler is selected from the group of calcium carbonate, silica, calcium metasilicate, alumina trihydrate, and feldspar.
Claim 12
Dependent Claim
14 words
The article of claim 1 wherein said binder further comprises an ethYlenically unsaturated compound.
Claim 13
Dependent Claim
38 words
The article of claim 11 wherein said ethylenically unsaturated compound is selected from the group consisting of ethylene glycol diacrylate, diacrylate of bisphenol A, ethoxylated diacrylate of bisphenol A, stryene, aliphatic urethane acrYlate, N-vinyl-2-pyrrolidone, divinylbenezene, and 1,6-hexanediol diacrylate.
Claim 14
Dependent Claim
12 words
The article of claim 1 wherein said binder further comprises a photoinitiator.
Claim 15
Dependent Claim
32 words
The article of claim 13 wherein the ratio of the blend of thermally curable resin and the radiation curable monomer to said photoinitiator, based on weight, ranges from about 95:5 to 99.99:0.01.
Claim 16
Dependent Claim
27 words
The article of claim 1 wherein the ratio of the thermally curable resin to the radiation curable monomer, based on weight, ranges from about 90:10 to 10:90.
Claim 17
Dependent Claim
27 words
The article of claim 1 wherein the ratio of the thermally curable resin to the radiation curable monomer, based on weight, ranges from about 15:85 to 33.67.
Claim 18
Dependent Claim
13 words
The article of claim 1 wherein said abrasive article is a coated abrasive.
Claim 19
Dependent Claim
112 words
A coated abrasive article comprising a backing, a make coat, abrasive grains, and a size coat, wherein at least one of said make coat or size coat comprises a binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group or (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 20
Dependent Claim
112 words
A coated abrasive article comprising a backing, a make coat, abrasive grains, and a size coat, wherein at least one of said make coat or size coat comprises a binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group or (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 21
Dependent Claim
121 words
A coated abrasive article comprising a backing, a backing treatment or treatments, a make coat, abrasive grains, and a size coat, wherein at least one of said backing treatment or treatments, make coat, or size coat comprises a binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group or (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 22
Dependent Claim
121 words
A coated abrasive article comprising a backing, a backing treatment or treatments, a make coat, abrasive grains, and a size coat, wherein at least one of said backing treatment or treatments, make coat, or size coat comprises a binder prepared from a blend comprising (1) at least one radiation curable monomer selected from the group consisting of: (a) isocyanurate derivatives having at least one terminal or pendant acrylate group, (b) isocyanate derivatives having at least one terminal or pendant acrylate group or (c) multifunctional acrylates having on average at least three pendant acrylate groups, and (2) a thermally curable resin selected from the group consisting of phenolic resins, epoxy resins having an oxirane ring, urea-formaldehyde resins, melamine-formaldehyde resins, and polyimide resins.
Claim 23
Dependent Claim
58 words
The coated abrasive of claim 19 wherein said backing treatment or treatments comprise a binder prepared from a blend comprising said thermally curable resin and said at least one radiation curable monomer and one of said make and size coats comprise a binder selected from the group consisting of glue, varnish, epoxy resin, phenolic resin, and polyurethane resin.
Claim 24
Dependent Claim
14 words
The article of claim 1 wherein said abrasive article is a nonwoven abrasive article.
Claim 25
Dependent Claim
14 words
The article of claim 1 wherein said thermally curable resin is a phenolic resin.
Claim 26
Dependent Claim
14 words
The article of claim 18 wherein said thermally curable resin is a phenolic resin.
Claim 27
Dependent Claim
14 words
The article of claim 19 wherein said thermally curable resin is a phenolic resin.
References Cited (Backward Citations)
DE1956810A1
Cited
US4047903A
Cited
GB1509069A
Cited
US4345545A
Cited
GB2087263A
Cited
US4457766A
Cited
US4547204A
Cited
US4588419A
Cited
EP0115160A2
Cited
US4642126A
Cited
US4652274A
Cited
US4644703A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-05-21 | 1993-11-20 | 1994-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-21 | 1997-11-20 | 1998-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-21 | 2001-11-20 | 2002-05-22 | $7700.00 | Window Closed / Lapsed |