Patent US4472019A successfully refreshed from Google Patents.
US4472019A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Topcoats for buffer-coated optical fiber using urethane acrylate and epoxy acrylate and vinyl monomer
Assignee: Covestro Resins BV
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Filing: 1982-12-28
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Granted: 1984-09-18
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Expires: 2002-12-28
Abstract
Abstract Radiation-curable coating compositions adapted for application to buffer-coated optical fibers are disclosed. These are intended to apply an adherent topcoat having greater toughness and greater hardness than the buffer coating. The new compositions comprise: (1) from 25% to 70% of diethylenic-terminated polyurethane, which may include urea linkages, the polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of a diethylenically unsaturated ester of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000; and (3) from 5% to 30% of liquid radiation-curable monoethylenically unsaturated monomer having a Tg above about 55 DEG C., especially N-vinyl pyrrolidone. Ultraviolet cures using acrylates as the ethylenic group are preferred.
Inventors
- 👤 Timothy E. Bishop
- 👤 George Pasternack
- 👤 Orvid R. Cutler, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:40
CPC Classifications
C; C08; C08F; C08F299/00; C08F299/02; C08F299/06; C08F299/065; C08F299/026; C09; C09D; C09D4/00; C09D4/06; Y; Y10; Y10S; Y10S525/00; Y10S525/92; Y10S525/922
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
118 words
A radiation-curable coating composition adapted to be applied to buffer-coated optical fibers to apply an adherent topcoat having greater toughness and greater hardness than said buffer coating comprising: (1) from 25% to 70% of the coating composition of diethylenic-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diethylenically unsaturated ester of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000, and (3) from 5% to 30% of the coating composition of liquid radiation curable monoethylenically unsaturated monomer having a T g above about 55° C.
Claim 2
Dependent Claim
118 words
A radiation-curable coating composition adapted to be applied to buffer-coated optical fibers to apply an adherent topcoat having greater toughness and greater hardness than said buffer coating comprising: (1) from 25% to 70% of the coating composition of diethylenic-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diethylenically unsaturated ester of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000, and (3) from 5% to 30% of the coating composition of liquid radiation curable monoethylenically unsaturated monomer having a T g above about 55° C.
Claim 3
Dependent Claim
31 words
A coating composition as recited in claim 1 in which said diglycidyl ether is a diglycidyl ether of bisphenol A, said diglycidyl ether having an average molecular weight less than 400.
Claim 4
Dependent Claim
25 words
A coating composition as recited in claim 1 in which said diethylenic-terminated polyurethane has an average molecular weight in the range of 800 to 2500.
Claim 5
Dependent Claim
37 words
A coating composition as recited in claim 1 in which from 5% to 30% of the coating composition is constituted by liquid monomer selected from the group of dimethyl acrylamide, N-vinyl pyrrolidone, isobornyl acrylate, and dicylopentenyl acrylate.
Claim 6
Dependent Claim
18 words
A coating composition as recited in claim 4 in which said liquid monomer consists essentially of N-vinyl pyrrolidone.
Claim 7
Dependent Claim
24 words
A coating composition as recited in claim 1 in which said diglycidyl ether of a bisphenol has a 1,2-epoxy equivalency of at least 1.4.
Claim 8
Dependent Claim
49 words
A coating composition as recited in claim 1 in which the polyurethanes which are diethylenic-terminated contain an organic diisocyanate which is the reaction product of an organic diisocyanate with an aliphatic molecule having two isocyanate-reactive hydrogen atoms, said reaction product including from 2 to 10 urethane and/or urea groups.
Claim 9
Dependent Claim
21 words
A coating composition as recited in claim 7 in which said aliphatic groups are selected from polyether, polyester and polyether-ester groups.
Claim 10
Dependent Claim
29 words
A coating composition as recited in claim 8 in which said diethylenic-terminated polyurethane is obtained from an hydroxyalkyl acrylate in which the alkyl group contains from 2-6 carbon atoms.
Claim 11
Dependent Claim
15 words
A coating composition as recited in claim 9 in which said acrylate is hydroxyethyl acrylate.
Claim 12
Dependent Claim
15 words
A coating composition as recited in claim 8 in which said polyurethane includes urea groups.
Claim 13
Dependent Claim
129 words
An ultraviolet curable coating composition adapted to be applied to buffer-coated optical fibers to apply an adherent topcoat having greater toughness and greater hardness than said buffer coating comprising: (1) from 25% to 70% of the coating composition of diacrylate-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diacrylate of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000; and (3) from 5% to 30% of the coating composition of liquid radiation-curable monoethylenically unsaturated monomer having a T g above about 55° C., said composition further including a photoinitiator rendering the composition sensitive to ultraviolet light.
Claim 14
Dependent Claim
129 words
An ultraviolet curable coating composition adapted to be applied to buffer-coated optical fibers to apply an adherent topcoat having greater toughness and greater hardness than said buffer coating comprising: (1) from 25% to 70% of the coating composition of diacrylate-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diacrylate of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000; and (3) from 5% to 30% of the coating composition of liquid radiation-curable monoethylenically unsaturated monomer having a T g above about 55° C., said composition further including a photoinitiator rendering the composition sensitive to ultraviolet light.
Claim 15
Dependent Claim
41 words
A coating composition as recited in claim 12 in which said polyurethane is obtained from an hydroxyalkyl acrylate in which the alkyl group contains from 2 to 6 carbon atoms and the reaction product of a diisocyanate with an aliphatic diol.
Claim 16
Dependent Claim
28 words
A coating composition as recited in claim 13 in which hydroxyethyl acrylate is reacted with a diisocyanate which includes repeating groups selected from polyether, polyester and polyether-ester groups.
Claim 17
Dependent Claim
125 words
An optical glass fiber prime coated with a coating having a room temperature modulus less than about 15,000 psi overcoated with a radiation-cured coating having greater toughness and greater hardness than said prime coating and comprising; (1) from 25% to 70% of the coating composition of diethylenic-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diethylenically unsaturated ester of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000, and (3) from 5% to 30% of the coating composition of liquid radiation curable monoethylenically unsaturated monomer having a Tg above about 55° C.
Claim 18
Dependent Claim
125 words
An optical glass fiber prime coated with a coating having a room temperature modulus less than about 15,000 psi overcoated with a radiation-cured coating having greater toughness and greater hardness than said prime coating and comprising; (1) from 25% to 70% of the coating composition of diethylenic-terminated polyurethane which may include urea linkages, said polyurethane being based on a diisocyanate having an average molecular weight of from 400 to 5000; (2) from 5% to 40% of the coating composition of a diethylenically unsaturated ester of a diglycidyl ether of a bisphenol, said ether having a molecular weight up to about 1000, and (3) from 5% to 30% of the coating composition of liquid radiation curable monoethylenically unsaturated monomer having a Tg above about 55° C.
Claim 19
Dependent Claim
56 words
An optical glass fiber prime coated with a coating having a room temperature modulus less than about 15,000 psi overcoated with a radiation-cured coating as recited in claim 15 in which said polyurethane is diacrylate-terminated, said diethylenically unsaturated ester is a diacrylate, and said composition further includes a photoinitiator rendering the composition sensitive to ultraviolet light.
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) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |