US5256170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coated abrasive article and method of making same
Assignee: 3M Co
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Filing: 1992-01-22
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Granted: 1993-10-26
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Expires: 2012-01-22
Abstract
Abstract A method for preparing a coated abrasive article wherein the a plurality of abrasive grains are applied to a make coat such that the abrasive grains are substantially a mono-layer. The make coat precursor is a pressure-sensitive adhesive-like or pressure-sensitive adhesive. The make coat precursor is partially cured to approximate a pressure-sensitive adhesive-like layer or when fully cured is a pressure-sensitive adhesive. The make coat precursor has sufficient "tack" to hold the abrasive grains during the application and curing of the size coat, resulting in a substantially monolayer of abrasive grains.
Inventors
- 👤 Walter L. Harmer
- 👤 Robert J. DeVoe
- 👤 Eric G. Larson
- 👤 Don H. Kincaid
- 👤 Peggy S. Willett
- 👤 Jerry W. Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:55
CPC Classifications
B; B24; B24D; B24D3/00; B24D3/34; B24D3/342; C; C09; C09K; C09K3/00; C09K3/14; B24D3/02; B24D3/20; B24D3/28; B32; B32B; B32B27/00; B32B27/14; C08; C08J; C08J5/00; Y; Y10; Y10S; Y10S526/00; Y10S526/943; Y10T; Y10T428/00; Y10T428/25; Y10T428/256
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
188 words
A method for making a coated abrasive article comprising the steps: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises: (a) at least one ethylenically unsaturated monomer, and (b) at least one of a cationically polymerizable monomer initiator or a polyurethane precursor, and (c) a catalytically-effective amount of a curing agent comprising: (i) at least one cationically polymerizable monomer or polyurethane precursor initiator, (ii) optionally, at least one thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with a metal ion of an organometallic complex salt, provided component (b) is a cationically polymerizable monomer, and (iii) optionally, at least one free radical initiator; (2) exposing the make coat precursor to an energy source to activate a organometallic complex salt; (3) partially polymerizing, either sequentially or simultaneously, the cationically polymerizable monomer or the polyurethane precursor; the ethylenically, unsaturated monomer; or both; (4) applying a plurality of abrasive grains onto the make coat precursor; (5) applying a size coat precursor; (6) fully curing the make coat precursor; and (7) fully curing the size coat precursor.
Claim 2
Independent Claim
188 words
A method for making a coated abrasive article comprising the steps: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises: (a) at least one ethylenically unsaturated monomer, and (b) at least one of a cationically polymerizable monomer initiator or a polyurethane precursor, and (c) a catalytically-effective amount of a curing agent comprising: (i) at least one cationically polymerizable monomer or polyurethane precursor initiator, (ii) optionally, at least one thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with a metal ion of an organometallic complex salt, provided component (b) is a cationically polymerizable monomer, and (iii) optionally, at least one free radical initiator; (2) exposing the make coat precursor to an energy source to activate a organometallic complex salt; (3) partially polymerizing, either sequentially or simultaneously, the cationically polymerizable monomer or the polyurethane precursor; the ethylenically, unsaturated monomer; or both; (4) applying a plurality of abrasive grains onto the make coat precursor; (5) applying a size coat precursor; (6) fully curing the make coat precursor; and (7) fully curing the size coat precursor.
Claim 3
Dependent Claim
36 words
The method according to claim 1 wherein the cationically polymerizable monomer of the make coat precursor is partially cured prior to applying the plurality of abrasive grains and then the make coat precursor is fully cured.
Claim 4
Dependent Claim
21 words
The method according to claim 2 wherein the size coat precursor is applied before the make coat precursor is fully cured.
Claim 5
Dependent Claim
21 words
The method according to claim 2 wherein the size coat precursor is applied after the make coat precursor is fully cured.
Claim 6
Dependent Claim
36 words
The method according to claim 1 wherein the ethylenically unsaturated monomer of the make coat precursor is partially cured prior to applying the plurality of abrasive grains and then the make coat precursor is fully cured.
Claim 7
Dependent Claim
21 words
The method according to claim 5 wherein the size coat precursor is applied before the make coat precursor is fully cured.
Claim 8
Dependent Claim
21 words
The method according to claim 5 wherein the size coat precursor is applied after the make coat precursor is fully cured.
Claim 9
Dependent Claim
16 words
The method according to claim 1 wherein the plurality of abrasive grains is substantially a monolayer.
Claim 10
Independent Claim
67 words
A method for making a coated abrasive article comprising: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises a pressure sensitive adhesive precursor; (2) fully curing the make coat precursor to a pressure sensitive adhesive; (3) applying a plurality of abrasive grains into the cured make coat; (4) applying a size coat precursor; and (5) fully curing the size coat precursor.
Claim 11
Independent Claim
67 words
A method for making a coated abrasive article comprising: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises a pressure sensitive adhesive precursor; (2) fully curing the make coat precursor to a pressure sensitive adhesive; (3) applying a plurality of abrasive grains into the cured make coat; (4) applying a size coat precursor; and (5) fully curing the size coat precursor.
Claim 12
Independent Claim
177 words
A method for making a coated abrasive article comprising: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises: (a) at least one ethylenically unsaturated monomer, and (b) at least one of a cationically polymerizable monomer or a polyurethane precursor, and (c) a catalytically-effective amount of a curing agent comprising: (i) at least cationically polymerizable monomer initiator or polyurethane precursor initiator, (ii) optionally, at least one thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with a metal ion of an organometallic complex salt, provided component (b) is a cationically polymerizable monomer, and (iii) optionally, at least one free radical initiator; (2) exposing make coat precursor to an energy source to activate either sequentially or simultaneously, the cationically polymerizable monomer or the polyurethane precursor; the ethylenically, unsaturated monomer; or both; (3) fully curing the make coat precursor; (4) applying a plurality of abrasive grains onto the make coat precursor; (5) applying a size coat precursor; and (6) fully curing the size coat precursor.
Claim 13
Independent Claim
177 words
A method for making a coated abrasive article comprising: (1) applying a make coat precursor to a backing, wherein the make coat precursor comprises: (a) at least one ethylenically unsaturated monomer, and (b) at least one of a cationically polymerizable monomer or a polyurethane precursor, and (c) a catalytically-effective amount of a curing agent comprising: (i) at least cationically polymerizable monomer initiator or polyurethane precursor initiator, (ii) optionally, at least one thermally decomposable ester reaction product of a tertiary alkyl alcohol and an acid that forms a chelation complex with a metal ion of an organometallic complex salt, provided component (b) is a cationically polymerizable monomer, and (iii) optionally, at least one free radical initiator; (2) exposing make coat precursor to an energy source to activate either sequentially or simultaneously, the cationically polymerizable monomer or the polyurethane precursor; the ethylenically, unsaturated monomer; or both; (3) fully curing the make coat precursor; (4) applying a plurality of abrasive grains onto the make coat precursor; (5) applying a size coat precursor; and (6) fully curing the size coat precursor.
Claim 14
Dependent Claim
23 words
The method according to claim 10 wherein the ethylenically unsaturated monomer is selected from the group consisting of (meth)acrylates, (meth)acrylamide, and vinyl compounds.
Claim 15
Dependent Claim
24 words
The method according to claim 10 wherein the cationically polymerizable monomer undergoes cationic polymerization and includes 1,2-, 1,3-, and 1,4-cyclic ethers, and vinyl ethers.
Claim 16
Dependent Claim
50 words
The method according to claim 10 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 isocyanate-reactive hydrogens atoms is 1:2 to 2:1.
Claim 17
Dependent Claim
16 words
The method according to claim 10 wherein the plurality of abrasive grains is substantially a monolayer.
References Cited (Backward Citations)
US3177099A
Cited
US2015658A
Cited
US2053360A
Cited
US3018262A
Cited
US3401190A
Cited
US3654106A
Cited
US3887450B1
Cited
US3887450A
Cited
US3895949A
Cited
US4047903A
Cited
US4304705A
Cited
US4588419A
Cited
US4642126A
Cited
US4652274A
Cited
US4751138A
Cited
US4997717A
Cited
US4735632A
Cited
US4740577A
Cited
US4985340A
Cited
US4927431A
Cited
US5059701A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-10-25 | 1997-04-26 | 1997-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-10-25 | 2001-04-26 | 2001-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-10-25 | 2005-04-26 | 2005-10-26 | $7700.00 | Window Closed / Lapsed |