US5435816A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making an abrasive article
Assignee: 3M Co
•
Filing: 1993-12-30
•
Granted: 1995-07-25
•
Expires: 2013-12-30
Abstract
Abstract This invention provides a method of making an abrasive article. The method of this invention comprises the steps of: a. providing a backing having a front surface; b. providing a radiation energy transmissive production tool having a contacting surface; c. applying a mixture comprising a plurality of abrasive particles and a binder precursor onto the contacting surface of the production tool; d. causing the mixture on the contacting surface of the production tool to come into contact with the front surface of the backing such that the mixture wets the front surface of the backing; e. transmitting radiation energy through the production tool to at least partially cure the binder precursor to form a shaped, handleable structure; and f. separating the shaped, handleable structure from the production tool. The shaped, handleable structure can be fully cured to form a coated abrasive article.
Inventors
- 👤 Kathryn M. Spurgeon
- 👤 Scott R. Culler
- 👤 David H. Hardy
- 👤 Gary L. Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:36
CPC Classifications
B; B24; B24D; B24D11/00; B24D11/001; B24D11/005; B29; B29C; B29C39/00; B29C39/14; B29C39/148; B29K; B29K2105/00; B29K2105/06; B29K2105/16
Claims Analysis
Total Claims: 48
Claim 1
Independent Claim
156 words
A method for preparing a shaped, handleable structure suitable for making a coated abrasive article comprising the steps of: a. providing a mixture comprising abrasive particles, a binder precursor, and optionally, a photoinitiator; b. providing a backing having a front surface; c. positioning said backing with respect to a radiation energy transmissive production tool having a contacting surface so that said front surface of said backing faces said contacting surface of said production tool to define a mixture receiving space between said contacting surface of said production tool and said front surface of said backing; d. introducing said mixture of step (a) into said mixture receiving space; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tool; and f. separating said shaped, handleable structure from said production tool.
Claim 2
Independent Claim
156 words
A method for preparing a shaped, handleable structure suitable for making a coated abrasive article comprising the steps of: a. providing a mixture comprising abrasive particles, a binder precursor, and optionally, a photoinitiator; b. providing a backing having a front surface; c. positioning said backing with respect to a radiation energy transmissive production tool having a contacting surface so that said front surface of said backing faces said contacting surface of said production tool to define a mixture receiving space between said contacting surface of said production tool and said front surface of said backing; d. introducing said mixture of step (a) into said mixture receiving space; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tool; and f. separating said shaped, handleable structure from said production tool.
Claim 3
Dependent Claim
15 words
The method of claim 1 wherein said contacting surface of said production tool contains cavities.
Claim 4
Dependent Claim
14 words
The method of claim 2 wherein said cavities are disposed in a non-random pattern.
Claim 5
Dependent Claim
33 words
The method of claim 1 wherein said backing comprises a material selected from the group consisting of polymeric film, untreated cloth, treated cloth, untreated paper, treated paper, vulcanized fiber, nonwovens, and combinations thereof.
Claim 6
Dependent Claim
33 words
The method of claim 1 wherein said abrasive particles comprise material selected from the group consisting of fused aluminum oxide, silicon carbide, alumina zirconia, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.
Claim 7
Dependent Claim
18 words
The method of claim 1 wherein said abrasive particles have a Moh's hardness of at least about 8.
Claim 8
Dependent Claim
55 words
The method of claim 1 wherein said binder precursor is selected from the group consisting of acrylated urethanes, acrylated epoxies, ethylenically unsaturated compounds, 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, vinyl ethers, epoxy resins, and combinations thereof.
Claim 9
Dependent Claim
13 words
The method of claim 7 wherein said binder precursor further comprises a photoinitiator.
Claim 10
Dependent Claim
40 words
The method of claim 1 wherein said mixture is introduced into said mixture receiving space by means of a coater selected from the group consisting of knife coater, drop die coater, curtain coater, vacuum die coater, and extrusion die coater.
Claim 11
Dependent Claim
23 words
The method of claim 1 wherein said production tool is transmissive of ultraviolet radiation, visible radiation, or both ultraviolet radiation and visible radiation.
Claim 12
Dependent Claim
20 words
The method of claim 1 wherein said production tool comprises a thermoplastic resin, a thermosetting resin, or a radiation-curable resin.
Claim 13
Dependent Claim
13 words
The method of claim 1 wherein said production tool comprises an endless belt.
Claim 14
Dependent Claim
27 words
The method of claim 1 wherein said radiation energy is provided by a source selected from the group consisting of electron beam, ultraviolet radiation, and visible radiation.
Claim 15
Dependent Claim
14 words
The method of claim 1 wherein said backing is opaque to said radiation energy.
Claim 16
Dependent Claim
19 words
The method of claim 1, further comprising the step of fully curing the shaped handleable structure of step f.
Claim 17
Independent Claim
146 words
A method for preparing a shaped, handleable structure for making a coated abrasive article comprising the steps of: a. providing a backing having a front surface; b. providing a radiation energy transmissive production tool having a contacting surface; c. applying a mixture comprising a plurality of abrasive particles a binder precursor, and optionally, a photoinitiator onto the contacting surface of said production tool; d. causing the mixture on the contacting surface of said production tool to come into contact with the front surface of said backing such that said mixture wets the front surface of said backing; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tools; and f. separating said shaped, handleable structure from said production tool.
Claim 18
Independent Claim
146 words
A method for preparing a shaped, handleable structure for making a coated abrasive article comprising the steps of: a. providing a backing having a front surface; b. providing a radiation energy transmissive production tool having a contacting surface; c. applying a mixture comprising a plurality of abrasive particles a binder precursor, and optionally, a photoinitiator onto the contacting surface of said production tool; d. causing the mixture on the contacting surface of said production tool to come into contact with the front surface of said backing such that said mixture wets the front surface of said backing; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tools; and f. separating said shaped, handleable structure from said production tool.
Claim 19
Dependent Claim
15 words
The method of claim 16 wherein said contacting surface of said production tool contains cavities.
Claim 20
Dependent Claim
14 words
The method of claim 17 wherein said cavities are disposed in a non-random pattern.
Claim 21
Dependent Claim
33 words
The method of claim 16 wherein said backing comprises a material selected from the group consisting of polymeric film, untreated cloth, treated cloth, untreated paper, treated paper, vulcanized fiber, nonwovens, and combinations thereof.
Claim 22
Dependent Claim
33 words
The method of claim 16 wherein said abrasive particles comprise material selected from the group consisting of fused aluminum oxide, silicon carbide, alumina zirconia, diamond, ceria, cubic boron nitride, garnet, and combinations thereof.
Claim 23
Dependent Claim
18 words
The method of claim 16 wherein said abrasive particles have a Moh's hardness of at least about 8.
Claim 24
Dependent Claim
55 words
The method of claim 16 wherein said binder precursor is selected from the group consisting of acrylated urethanes, acrylated epoxies, ethylenically unsaturated compounds, 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, vinyl ethers, epoxy resins, and combinations thereof.
Claim 25
Dependent Claim
13 words
The method of claim 22 wherein said binder precursor further comprises a photoinitiator.
Claim 26
Dependent Claim
35 words
The method of claim 16 wherein said mixture is applied by means of a coater selected from the group consisting of knife coater, drop die coater, curtain coater, vacuum die coater, and extrusion die coater.
Claim 27
Dependent Claim
24 words
The method of claim 16 wherein said production tool is transmissive of to ultraviolet radiation, visible radiation, or both ultraviolet radiation and visible radiation.
Claim 28
Dependent Claim
20 words
The method of claim 16 wherein said production tool comprises a thermoplastic resin, a thermosetting resin, or a radiation-curable resin.
Claim 29
Dependent Claim
27 words
The method of claim 16 wherein said radiation energy is provided by a source selected from the group consisting of electron beam, ultraviolet radiation, and visible radiation.
Claim 30
Dependent Claim
14 words
The method of claim 16 wherein said backing is opaque to said radiation energy.
Claim 31
Dependent Claim
13 words
The method of claim 16 wherein said production tool comprises an endless belt.
Claim 32
Dependent Claim
19 words
The method of claim 16, further comprising the step of fully curing the shaped, handleable structure of step f.
Claim 33
Independent Claim
147 words
A method for preparing a shaped, handleable structure for making a coated abrasive article comprising the steps of: a. providing a backing having a front surface; b. providing a radiation energy transmissive production tool having a contacting surface; c. applying a mixture comprising a plurality of abrasive particles a binder precursor, and optionally, a photoinitiator to the front surface of said backing; d. causing said mixture on the front surface of said backing to come into direct contact with the contacting surface of said production tool such that said mixture wets the contacting surface of said production tool; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tool; and f. separating said shaped, handleable structure from said production tool.
Claim 34
Independent Claim
147 words
A method for preparing a shaped, handleable structure for making a coated abrasive article comprising the steps of: a. providing a backing having a front surface; b. providing a radiation energy transmissive production tool having a contacting surface; c. applying a mixture comprising a plurality of abrasive particles a binder precursor, and optionally, a photoinitiator to the front surface of said backing; d. causing said mixture on the front surface of said backing to come into direct contact with the contacting surface of said production tool such that said mixture wets the contacting surface of said production tool; e. transmitting radiation energy through said production tool to at least partially cure said binder precursor to provide a shaped, handleable structure, said production tool continuously moving while said radiation energy is being transmitted through said production tool; and f. separating said shaped, handleable structure from said production tool.
Claim 35
Dependent Claim
15 words
The method of claim 31 wherein said contacting surface of said production tool contains cavities.
Claim 36
Dependent Claim
14 words
The method of claim 32 wherein said cavities, are disposed in a non-random pattern.
Claim 37
Dependent Claim
33 words
The method of claim 31 wherein said backing comprises a material selected from the group consisting of polymeric film, untreated cloth, treated cloth, untreated paper, treated paper, vulcanized fiber, nonwovens, and combinations thereof.
Claim 38
Dependent Claim
33 words
The method of claim 31 wherein said abrasive particles comprise material selected from the group consisting of fused aluminum oxide, silicon carbide, alumina zirconia, diamond ceria, cubic boron nitride, garnet, and combinations thereof.
Claim 39
Dependent Claim
18 words
The method of claim 31 wherein said abrasive particles have a Moh hardness of at least about 8.
Claim 40
Dependent Claim
55 words
The method of claim 31 wherein said binder precursor is selected from the group consisting of acrylated urethanes, acrylated epoxies, ethylenically unsaturated compounds, 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, vinyl ethers, epoxy resins, and combinations thereof.
Claim 41
Dependent Claim
13 words
The method of claim 37 wherein said binder precursor further comprises a photoinitiator.
Claim 42
Dependent Claim
35 words
The method of claim 31 wherein said mixture is applied by means of a coater selected from the group consisting of knife coater, drop die coater, curtain coater, vacuum die coater, and extrusion die coater.
Claim 43
Dependent Claim
23 words
The method of claim 31 wherein said production tool is transmissive of ultraviolet radiation visible radiation, or both ultraviolet radiation and visible radiation.
Claim 44
Dependent Claim
20 words
The method of claim 31 wherein said production tool comprises a thermoplastic resin, a thermosetting resin, or a radiation-curable resin.
Claim 45
Dependent Claim
28 words
The method of claim 31 wherein said radiation energy is provided by a source is selected from the group consisting of electron beam, ultraviolet radiation, and visible radiation.
Claim 46
Dependent Claim
14 words
The method of claim 31 wherein said backing is opaque to said radiation energy.
Claim 47
Dependent Claim
13 words
The method of claim 21 wherein said production tool comprises an endless belt.
Claim 48
Dependent Claim
19 words
The method of claim 1, further comprising the step of fully curing the shaped, handleable structure of step f.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-24 | 1999-01-23 | 1999-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-24 | 2003-01-23 | 2003-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-24 | 2007-01-23 | 2007-07-25 | $7700.00 | Window Closed / Lapsed |