US3637419A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating rigid cores and product thereof
Assignee: WR Grace and Co
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Filing: 1969-11-24
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Granted: 1972-01-25
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Expires: 1989-11-24
Abstract
Abstract Industrial rollers are prepared by photocuring a layer of photocurable composition on the rigid core and then photocuring a layer of diluted photocurable composition to obtain a smooth uniform glazelike finish. As the core cylinder is rotated, a thin layer of photocurable composition is fed intermittently or continuously onto the rotating cylinder, where it can optionally be smoothed by a doctor blade. The photocurable composition preferably is photocured by an ultraviolet light source which is located on the cylinder side opposite the place where the photocurable composition is applied so that premature hardening does not occur in the feed stock. Multiple, consecutive layers of photocurable composition can be built up on the rigid core, each (after the first) being placed upon a partially hardened photocured sublayer. In this manner, the photocured material on the rigid core can be built up to any desired and practical thickness. A solvent-diluted photocurable composition is then coated on the coated core and photocured to furnish the smooth glazelike finish. Toluene is the preferred solvent.
Inventors
- 👤 Christian B Lundsager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:57
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/06; B41; B41N; B41N7/00; B41N7/005; C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/6715; C08G18/83; C08G18/834; C08G18/835; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; C08L; C08L81/00; C08L81/04; C09; C09D; C09D181/00; C09D181/02; G; G03; G03F; G03F7/00; G03F7/004; G03F7/027; G03F7/0275; G03F7/16; G03F7/18; B41N2207/00; B41N2207/02; B41N2207/14; Y; Y10; Y10S; Y10S525/00; Y10S525/92; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/31504; Y10T428/31855; Y10T428/31931
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
17 words
A process as described in claim 1 wherein said photocuring is achieved by means of ultraviolet radiation
Claim 2
Dependent Claim
18 words
A process as described in claim 1 wherein said photocuring is achieved by means of electron beam radiation.
Claim 3
Dependent Claim
12 words
A process as described in claim 1 wherein said solvent is toluene.
Claim 4
Dependent Claim
41 words
A process as described in claim 1 wherein said coated roller containing said photocurable finishing layer is rotated for a period of time between steps (c) and (d), whereby a substantial portion of said solvent evaporates before step (d) is conducted.
Claim 5
Dependent Claim
33 words
A process as described in claim 1 wherein said coating step (a) and said photocuring step (b) occur simultaneously, said photocuring occurring in the freshly coated layer and in several previously coated layers.
Claim 6
Dependent Claim
63 words
A process as described in claim 1 wherein said photocurable composition used in step (a) and step (c) comprises an ethylenically unsaturated polyene having at least two reaCtive ene groups per molecule, a polythiol containing two or more thiol groups per molecule, and a photocuring rate accelerator, where the sum of the functionalities of said polyene and said polythiol is greater than 4.
Claim 7
Dependent Claim
186 words
A process as described in claim 7 wherein the photocurable composition in said photocurable layer is comprised of 2 to 98 parts by weight of said polyene, 98 to 2 parts by weight of said polythiol, and 0.0005 to 50 parts by weight photocuring rate accelerator based on 100 parts by weight of said polyene and said polythiol. 9, A process as described in claim 8 wherein said polyene composition has a molecular weight in the range of 50 to 20,000; has a viscosity ranging from essentially 0 to 20 million centipoises at 130* C.; and has a general formula: (A)-(X)m wherein X is a member of the group consisting of and R-C C-; m is an integer of at least 2; R is independently selected from the group consisting of hydrogen, halogen, and an organic compound selected from the group consisting of aryl, substituted aryl, aralkyl, substituted aralkyl, cycloalkyl, substituted cycloalkyl, alkyl and substituted alkyl groups containing one to four carbon atoms; and A is a polyvalent polymeric organic moiety free of (1) reactive carbon-to-carbon unsaturation, and (2) unsaturated groupings in terminal conjugation with X.
Claim 8
Dependent Claim
18 words
A process as described in claim 8 wherein the polyene has a molecular weight in excess of 300.
Claim 9
Dependent Claim
66 words
A process as described in claim 8 wherein the photocurable composition contains 0.0005 to 5.0 parts by weight of an antioxidant, 0.05 to 25 parts by weight of a pigment, 1.0 to 50 parts by weight of a plasticizer, and 0.5 to 100 parts by weight of a filler, each of said ingredients being based upon 100 parts by weight of said polyene and said polythiol.
Claim 10
Dependent Claim
12 words
A process as described in Claim 11 wherein said antioxidant is 2,6-di-tert-butyl-4-methylphenol.
Claim 11
Dependent Claim
36 words
A process as described in claim 8 wherein the two or more reactive ene groups are located terminally in the molecule or where the two or more reactive ene groups are conjugated with other unsaturated groups.
Claim 12
Dependent Claim
37 words
A process as described in claim 8 wherein the said polythiol has a molecular weight between about 50 and about 20,000, and has a viscosity between slightly above 0 and about 20 million centipoises at 70* C.
Claim 13
Dependent Claim
21 words
A process as described in claim 8 wherein said polyene is prepared from allyl alcohol, polyalkylene ether glycol and tolylene diisocyanate.
Claim 14
Dependent Claim
20 words
A process as described in claim 7 wherein the same photocurable composition is used in step (a) and step (c).
Claim 15
Dependent Claim
19 words
A process as described in claim 7 wherein different photocurable compositions are used in step (a) and step (c).
Claim 16
Dependent Claim
35 words
An article of manufacture which comprises (i) a cylindrical core, (ii) a photocured coating layer and (iii) a photocured smooth, glazelike finishing layer, said layer (ii) and said layer (iii) being essentially one monolithic layer.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-24 | 1975-07-26 | 1976-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-24 | 1979-07-26 | 1980-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-24 | 1983-07-26 | 1984-01-25 | $7700.00 | Window Closed / Lapsed |