Patent US4652274A successfully refreshed from Google Patents.
US4652274A
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Coated abrasive product having radiation curable binder
Assignee: 3M Co
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Filing: 1985-08-07
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Granted: 1987-03-24
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Expires: 2005-08-07
Abstract
Abstract A coated abrasive product comprising abrasive granules adherently bonded to at least one major surface of a backing sheet by a radiation curable resinous binder material. The binder material can be used to form the make coat, size coat, or both coats. Alternatively, the binder material can be used in embodiments where only a single binder coat is employed. The radiation curable resinous binder material comprises a copolymer formed from a mixture comprising (1) at least one monomer selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group and isocyanate derivatives having at least one terminal or pendant acrylate group, and (2) at least one aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group.
Inventors
- 👤 Thomas E. Boettcher
- 👤 Victor P. Thalacker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:19
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/14; B; B24; B24D; B24D3/00; B24D3/02; B24D3/20; B24D3/28; B24D3/30
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
119 words
A coated abrasive product comprising abrasive granules which are supported on and adherently bonded to at least one major surface of a backing sheet by a make coat of a first resinous binder material and a size coat of a second resinous binder material, at least one of said first resinous binder material or said second resinous binder material comprising a copolymer formed from a mixture comprising (1) at least one monomer selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group and isocyanate derivatives having at least one terminal or pendant acrylate group, and (2) at least one aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group.
Claim 2
Dependent Claim
119 words
A coated abrasive product comprising abrasive granules which are supported on and adherently bonded to at least one major surface of a backing sheet by a make coat of a first resinous binder material and a size coat of a second resinous binder material, at least one of said first resinous binder material or said second resinous binder material comprising a copolymer formed from a mixture comprising (1) at least one monomer selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group and isocyanate derivatives having at least one terminal or pendant acrylate group, and (2) at least one aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group.
Claim 3
Dependent Claim
36 words
The abrasive product of claim 1 wherein the ratio of isocyanurate or isocyanurate derivative monomer to the aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group ranges from about 1:3 to 3:1.
Claim 4
Dependent Claim
37 words
The abrasive product of claim 1 wherein the ratio of isocyanurate or isocyanate derivative monomer to the aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group ranges from about 1:1.5 to about 1.5:1.
Claim 5
Dependent Claim
41 words
The abrasive product of claim 1 wherein said isocyanurate derivative monomer is represented by the formula: ##STR7## 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 6
Dependent Claim
100 words
The abrasive product of claim 4 where R is selected from the group consisting of ##STR8## R 1 represents a divalent alkylene group, R 2 represents --H or --CH 3 , R 3 represents --H or --CH 3 , R 4 represents --H, an alkyl group, or an arylalkyl group, R 5 represents --H, an alkyl group, or an 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
113 words
The abrasive product of claim 1 wherein said isocyanate derivative monomer is represented by the formula: ##STR9## where A represents a divalent alkylene group, each R 8 can be the same or different and represents ##STR10## R 2 represents --H or --CH 3 , R 3 represents --H or --CH 3 , R 4 represents --H, an alkyl group, or an arylalkyl group, R 5 represents --H, an alkyl group, or an 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 8
Dependent Claim
82 words
The abrasive product of claim 1 wherein said aliphatic or cycloaliphatic monomer having at least one acrylic group is represented by the formula: ##STR11## where each R 9 can be the same or different, and R 9 represents ##STR12## R 10 represents an alkyl group, R 11 represents --H or --CH 3 , R 12 represents --H or --CH 3 , and R 13 represents a covalent bond or a divalent alkylene group, at one of said R 9 not being --H.
Claim 9
Dependent Claim
26 words
The abrasive product of claim 1 wherein said abrasive granules are selected from the group consisting of flint, garnet, aluminum oxide, alumina:zirconia, diamond, and silicon carbide.
Claim 10
Dependent Claim
34 words
The abrasive product of claim 1 wherein said first resinous binder is said copolymer and said second resinous binder is selected from the group consisting of glue, varnish, epoxy resin, phenolic resin and polyurethane.
Claim 11
Dependent Claim
34 words
The abrasive product of claim 1 wherein said first resinous binder is selected from the group consisting of glue, varnish, epoxy resin, phenolic resin and polyurethane and said second resinous binder is said copolymer.
Claim 12
Dependent Claim
19 words
The abrasive product of claim 1 wherein said backing sheet is formed of paper, film, fiber, or woven cloth.
Claim 13
Dependent Claim
15 words
The abrasive product of claim 1 wherein said mixture further comprises a thermal curing catalyst.
Claim 14
Dependent Claim
83 words
Method of preparing the coated abrasive product of claim 1 comprising the steps of: (1) providing a backing sheet, (2) applying said make coat to said backing sheet, (3) applying abrasive granules over said make coat, (4) at least partially curing said make coat, (5) applying said size coat over said make coat and said abrasive granules, and (6) completely curing said make and said size coat, provided that at least one of said curing steps is conducted by means of ultraviolet radiation.
Claim 15
Dependent Claim
20 words
The method of claim 13 wherein at least one of said curing steps is conducted by means of electromagnetic radiation.
Claim 16
Dependent Claim
12 words
The method of claim 14 wherein said electromagnetic radiation is ultraviolet radiation.
Claim 17
Dependent Claim
12 words
The method of claim 14 wherein said electromagnetic radiation is ionizing radiation.
Claim 18
Dependent Claim
13 words
The method of claim 20 wherein said ionizing radiation is electron beam radiation.
Claim 19
Dependent Claim
21 words
The method of claim 13 further including the step of post-curing said cured coated abrasive product by means of thermal energy.
Claim 20
Dependent Claim
93 words
A coated abrasive product comprising abrasive granules which are supported on and adherently bonded to at least one major surface of a backing sheet by a resinous binder material, said resinous binder material comprising a copolymer formed from a mixture comprising (1) at least one monomer selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group and isocyanate derivatives having at least one terminal or pendant acrylate group, and (2) at least one aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group.
Claim 21
Dependent Claim
93 words
A coated abrasive product comprising abrasive granules which are supported on and adherently bonded to at least one major surface of a backing sheet by a resinous binder material, said resinous binder material comprising a copolymer formed from a mixture comprising (1) at least one monomer selected from the group consisting of isocyanurate derivatives having at least one terminal or pendant acrylate group and isocyanate derivatives having at least one terminal or pendant acrylate group, and (2) at least one aliphatic or cycloaliphatic monomer having at least one terminal or pendant acrylate group.
Claim 22
Dependent Claim
95 words
Method of preparing the coated abrasive product of claim 12 comprising the steps of: (1) providing a backing sheet, (2) applying said make coat to said backing sheet, (3) applying abrasive granules over said make coat, (4) at least partially curing said make coat, (5) applying said size coat over said make coat and said abrasive granules, and (6) completely curing said make and said size coat, provided that one of said curing steps is conducted by means of ionizing radiation and the other of said curing steps is conducted by means of thermal energy.
Claim 23
Dependent Claim
83 words
Method of preparing the coated abrasive product of claim 12 comprising the steps of: (1) providing a backing sheet, (2) applying said make coat to said backing sheet, (3) applying abrasive granules over said make coat, (4) at least partially curing said make coat, (5) applying said size coat over said make coat and said abrasive granules, and (6) completely curing said make and said size coat, provided that at least one of said curing steps is conducted by means of ultraviolet radiation.
Claim 24
Dependent Claim
90 words
Method of preparing the coated abrasive product of claim 1 comprising the steps of: (1) providing a backing sheet, (2) applying said make coat to said backing sheet, (3) applying abrasive granules over said make coat, (4) at least partially curing said make coat, (5) applying said size coat over said make coat and said abrasive granules, and (6) completely curing said make and said size coat, provided that at least one of said curing steps is conducted by means of ionizing radiation followed by a post-cure with thermal energy.
Claim 25
Dependent Claim
90 words
Method of preparing the coated abrasive produce of claim 12 comprising the steps of: (1) providing a backing sheet, (2) applying said make coat to said backing sheet, (3) applying abrasive granules over said make coat, (4) at least partially curing said make coat, (5) applying said size coat over said make coat and said abrasive granules, and (6) completely curing said make and said size coat, provided that at least one of said curing steps is conducted by means of ultraviolet radiation followed by a post-cure with thermal energy.
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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) | 1990-03-23 | 1990-09-22 | 1991-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-23 | 1994-09-22 | 1995-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-23 | 1998-09-22 | 1999-03-24 | $7700.00 | Window Closed / Lapsed |