US3767457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating rigid cores
Assignee: WR Grace and Co Conn
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Filing: 1971-11-19
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Granted: 1973-10-23
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Expires: 1991-11-19
Abstract
Abstract Industrial rollers are prepared by photocuring a layer of photocurable composition on the rigid core. 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. The photocured surface of the roller can be ground and buffed to make a final product of accurately controlled dimensions.
Inventors
- 👤 B Hubbard
- 👤 C Kehr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:14
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/002; B05D3/00; B05D3/06; B05D3/061; B05D3/065; B05D3/067; B05D3/068; B29; B29C; B29C35/00; B29C35/02; B29C35/08; B29C35/10; B29C70/00; B29C70/68; B29C70/72; B29D; B29D99/00; B29D99/0032; B29D99/0035; C; C08; C08G; C08G75/00; C08G75/02; C08G75/04; C08G75/045; C08G75/12; B29C35/0805; B29C2035/0827; B29L; B29L2031/00; B29L2031/32; B29L2031/324; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/31504; Y10T428/31533; Y10T428/31678
Claims Analysis
Total Claims: 15
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
29 words
A process as described in claim 1 wherein said coating and said photocuring occur simultaneously, said photocuring occurring in the freshly coated layer and in previously coated layers present.
Claim 4
Dependent Claim
56 words
A process as described in claim 1 wherein said photocurable composition 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 four.
Claim 5
Dependent Claim
58 words
A process as described in claim 5 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.
Claim 6
Dependent Claim
50 words
A process as described in claim 6 wherein said polyene composition has a molecular weight in the range of 50 to 20,000; has a viscosity ranging from essentially 0 to 20,000,000 centipoises at 130*C.; and has a general formula: (A)-(X)m wherein X is a member of the group consisting of
Claim 7
Dependent Claim
18 words
A process as described in claim 7 wherein the polyene has a molecular weight in excess of 300.
Claim 8
Dependent Claim
36 words
A process as described in claim 7 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 9
Dependent Claim
35 words
A process as described in claim 7 wherein the said polythiol has a molecular weight between about 50 and about 20,000, and has a viscosity between slightly above zero and about 20,000,000 centipoises at 70*C.
Claim 10
Dependent Claim
21 words
A process as described in claim 7 wherein said polyene is prepared from allyl alcohol, polyalkylene ether glycol and tolylene diisocyanate.
Claim 11
Dependent Claim
66 words
A process as described in claim 6 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 12
Dependent Claim
12 words
A process as described in claim 9 wherein said antioxidant is 2,6-di-tert-butyl-4-methylphenol.
Claim 13
Dependent Claim
15 words
A process as described in claim 1 wherein said photocured coating is ground and buffed.
Claim 14
Dependent Claim
49 words
A process as described in claim 1 wherein said radiation is electron beam radiation from a source which is located essentially perpendicular of said rotating core and wherein photocurable composition is coated onto said rotating core from a source which is located at a point opposite the radiation source.
Claim 15
Dependent Claim
14 words
An article of manufacture consisting of a cylindrical core coated with a cured polythioether.
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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) | 1976-10-22 | 1977-04-23 | 1977-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-22 | 1981-04-23 | 1981-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-22 | 1985-04-23 | 1985-10-23 | $7700.00 | Window Closed / Lapsed |