US4922113A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for fluorimetric monitoring of functional coatings and compositions and fluorescent agents therefor
Assignee: 3M Co
•
Filing: 1988-03-07
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Granted: 1990-05-01
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Expires: 2008-03-07
Abstract
Abstract A method for monitoring the coating weight, uniformity, defects or markings present in a coating of a composition applied to a substrate comprises the steps: (a) providing a substrate with a functional coating of a composition comprising an effective amount of uvescer that absorbs radiant energy, i.e., has an excitation energy, of wavelength ξ 1 and emits radiant energy of wavelength λ 2 ; (b) scanning the coating with radiant energy having a wavelength within wavelength λ 1 ; (c) detecting the radiant energy of wavelength λ 2 emitted by the coating; and (d) optionally, correlating the emitted radiant energy to independently measured standard coating weights or thicknesses, of the coating so as to measure coating weight, thickness, uniformity, defects, or markings.
Inventors
- 👤 Kurt C. Melancon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:33
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N21/6428; G01N21/643; C; C09; C09K; C09K11/00; C09K11/06; G01N2021/6439; G01N21/645; G01N21/6456; G01N2021/646; G01N21/84; G01N21/8422; G01N2021/8427
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
141 words
A process for monitoring functional coating compositions applied to a substrate comprising the steps: (a) providing a functional coating composition comprising an effective amount of a uvescer that absorbs radiant energy of a wavelength range centered around λ 1 and emits radiant energy of a wavelength range centered around λ 2 , λ 1 and λ 2 each being a wavelength up to 400 nm within the ultraviolet portion of the electromagnetic spectrum; and the mean of the range of λ 1 being be low the mean of the range of λ 2 ; (b) coating a substrate with a layer of said functional coating composition; (c) scanning the resulting coating with radiant energy of a wavelength range centered around λ 1 ; and (d) detecting the radiant energy of a wavelength range centered around λ 2 emitted by said coating.
Claim 2
Dependent Claim
141 words
A process for monitoring functional coating compositions applied to a substrate comprising the steps: (a) providing a functional coating composition comprising an effective amount of a uvescer that absorbs radiant energy of a wavelength range centered around λ 1 and emits radiant energy of a wavelength range centered around λ 2 , λ 1 and λ 2 each being a wavelength up to 400 nm within the ultraviolet portion of the electromagnetic spectrum; and the mean of the range of λ 1 being be low the mean of the range of λ 2 ; (b) coating a substrate with a layer of said functional coating composition; (c) scanning the resulting coating with radiant energy of a wavelength range centered around λ 1 ; and (d) detecting the radiant energy of a wavelength range centered around λ 2 emitted by said coating.
Claim 3
Dependent Claim
36 words
The process according to claim 1 further comprising the step of correlating said emitted radiant energy to independently measured standard weights or thicknesses, so as to measure coating weight, thickness, uniformity, or defects of said coating.
Claim 4
Dependent Claim
27 words
The process according to claim 1 further comprising the step of curing said resulting coating by means of heat or exposure to actinic or to electron-beam radiation.
Claim 5
Dependent Claim
30 words
The process according to claim 1 wherein the functional coating composition is selected from protective coatings, adhesive coatings, priming coatings, low adhesion backsize coatings, radiation-sensitive imageable coatings, and release coatings.
Claim 6
Dependent Claim
21 words
The process of claim 4 wherein said substrate (1) fluoresces at a wavelength above 350 namometers or (2) does not fluoresce.
Claim 7
Dependent Claim
29 words
The process of claim 1 wherein λ 1 is in the range of 240 to 400 nm and λ 2 is in the range of 280 to 400 nm.
Claim 8
Dependent Claim
27 words
The process according to claim 1 wherein λ 1 is in the range of 240 to 400 nanometers and λ 2 is a wavelength below 400 nanometers.
Claim 9
Dependent Claim
69 words
The process of claim 1 wherein said uvescer is a polycyclic aromatic compound that (a) absorbs radiant energy of a wavelength within the range of 240 to 400 nm and emits radiant energy of a wavelength below 430 nm of which less than 30% has a wavelength above 400 nm and (b) has a product (εφ) of molar extinction coefficient (ε) and quantum yield (φ) of at least 1000.
Claim 10
Dependent Claim
19 words
The process of claim 8 wherein said uvescer has a product (εφ) of molar extinction of 10,000 or more.
Claim 11
Dependent Claim
25 words
The process of claim 1 wherein said uvescer is selected from biphenyl, triphenylbenzene, fluorene, carbazole, terphenyl, quaterphenyl, triphenylene, naphthalene, 2,5-diphenylfuran, dibenzofuran, 2,5-diphenyl-1,2,4-oxadiazole, and their derivatives.
Claim 12
Dependent Claim
10 words
The process of claim 1 wherein said uvescer is 9-allylfluorene.
Claim 13
Dependent Claim
18 words
The process according to claim 1 wherein said detecting is of a pattern of marks, images, or codes.
Claim 14
Dependent Claim
16 words
The process according to claim 1 wherein said uvescer is chemically bound in said coating composition.
Claim 15
Dependent Claim
15 words
The process according to claim 1 wherein said uvescer is soluble in said coating composition.
Claim 16
Dependent Claim
15 words
The process according to claim 1 wherein said uvescer is dispersed in said coating composition.
Claim 17
Dependent Claim
142 words
A process for monitoring the thickness of functional coating compositions applied to a substrate comprising the steps: (a) providing a functional coating composition comprising an effective amount of uvescer that absorbs radiant energy of a wavelength range centered around λ 1 and emits radiant energy of a wavelength range centered around λ 2 , λ 1 and λ 2 each being a wavelength up to 400 nm within the ultraviolet portion of the electromagnetic spectrum; and the mean of the range of λ 1 being below the mean of the range of λ 2 ; (b) coating a substrate with a layer of said functional coating composition; (c) scanning the resulting coating with radiant energy of a wavelength range centered around λ 1 ; and (d) detecting the radiant energy of a wavelength centered around range λ 2 emitted by said coating.
Claim 18
Dependent Claim
142 words
A process for monitoring the thickness of functional coating compositions applied to a substrate comprising the steps: (a) providing a functional coating composition comprising an effective amount of uvescer that absorbs radiant energy of a wavelength range centered around λ 1 and emits radiant energy of a wavelength range centered around λ 2 , λ 1 and λ 2 each being a wavelength up to 400 nm within the ultraviolet portion of the electromagnetic spectrum; and the mean of the range of λ 1 being below the mean of the range of λ 2 ; (b) coating a substrate with a layer of said functional coating composition; (c) scanning the resulting coating with radiant energy of a wavelength range centered around λ 1 ; and (d) detecting the radiant energy of a wavelength centered around range λ 2 emitted by said coating.
Claim 19
Dependent Claim
31 words
The process according to claim 16 further comprising the step of correlating said emitted radiant energy to independently measured standard weights or thicknesses so as to measure the coating weight thickness.
Claim 20
Dependent Claim
27 words
The process according to claim 16 further comprising the step of curing said resulting coating by means of heat or exposure to actinic or to electron-beam radiation.
Claim 21
Dependent Claim
30 words
The process according to claim 16 wherein the functional coating composition is selected from protective coatings, adhesive coatings, primary coatings, low adhesion backsize coatings, radiation-sensitive imageable coatings, and release coatings.
Claim 22
Dependent Claim
27 words
The process according to claim 16 wherein λ 1 is in the range of 240 to 400 nanometers and λ 2 is a wavelength below 400 nanometers.
Claim 23
Dependent Claim
29 words
The process of claim 16 wherein λ 1 is in the range of 240 to 400 nm and λ 2 is in the range of 280 to 400 nm.
Claim 24
Dependent Claim
15 words
The process of claim 16 wherein said substrate fluoresces at a wavelength above 350 nanometers.
Claim 25
Dependent Claim
11 words
The process of claim 16 wherein said substrate does not fluoresce.
Claim 26
Dependent Claim
58 words
The process of claim 16 wherein said uvescer is a polycyclic aromatic compound that (a) absorbs radiant energy of a wavelength within the range of 240 to 400 nm and emits radiant energy of a wavelength below 400 nm and (b) has a product (εφ) of molar extinction coefficient (ε) and quantum yield (φ) of at least 1000.
Claim 27
Dependent Claim
19 words
The process of claim 16 wherein said uvescer has a product (εφ) of molar extinction of 10.000 or more.
Claim 28
Dependent Claim
25 words
The process of claim 16 wherein said uvescer is selected from biphenyl, triphenylbenzene, fluorene, carbazole, terphenyl, quaterphenyl, triphenylene, naphthalene, 2,5-diphenylfuran, dibenzofuran, 2,5-diphenyl-1,2,4-oxadiazole, and their derivatives.
Claim 29
Dependent Claim
10 words
The process of claim 16 wherein said uvescer is 9-allylfluorene.
Claim 30
Dependent Claim
18 words
The process according to claim 16 wherein said detecting is of a pattern of marks, images, or codes.
Claim 31
Dependent Claim
16 words
The process according to claim 16 wherein said uvescer is chemically bound in said coating composition.
Claim 32
Dependent Claim
15 words
The process according to claim 16 wherein said uvescer is soluble in said coating composition.
Claim 33
Dependent Claim
15 words
The process according to claim 16 wherein said uvescer is dispersed in said coating composition.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
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