US4624994A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soft and tough radiation-curable coatings for fiber optic application
Assignee: Covestro Resins BV
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Filing: 1980-07-18
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Granted: 1986-11-25
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Expires: 2000-07-18
Abstract
Abstract A radiation-curable liquid coating composition which cures on radiation exposure to form a soft and tough coating and which is adapted for coating optical fiber is disclosed. This composition comprises a polyurethane, polyamide or polyurea oligomer having (1) a molecular weight in the range of about 2000 to about 8000; (2) amide, urea or urethane groups in an amount of one such group for every 300 to 900 units of weight; and (3) polyalkylene polyether, polyalkylene polysulfide or polyalkylene polyester groups in which the alkylene moiety contains 2-6 carbon atoms. The polyether, polysulfide or polyester constitutes about 40% to about 90% by weight of the oligomer, and each end of the oligomer is terminated with a monoethylenically unsaturated addition polymerizable group. From 20% to 50% of the weight of the composition is a radiation-curable monoethylenically unsaturated monomer having a T g below about 10° C., and from 2% to 20% of the composition is a monoethylenically unsaturated monomer having a strong capacity for hydrogen bonding, such as vinyl pyrrolidone.
Inventors
- 👤 Robert E. Ansel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175; C08F; C08F283/00; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/60; C08G18/603; C08G18/67; C08G18/671; C08G18/672; Y; Y10; Y10S; Y10S525/00; Y10S525/92
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
163 words
A radiation-curable liquid coating composition which cures on radiation exposure to form a soft and tough coating comprising, a polyurethane, polyamide or polyurea oligomer having (1) a molecular weight in the range of about 2000 to about 8000; (2) amide, urea or urethane groups in an amount of one such group for every 300 to 900 units of weight, and (3) polyalkylene polyether, polyalkylene polysulfide or polyalkylene polyester groups in which the alkylene moiety contains from 2-6 carbon atoms, said polyether, polysulfide or polyester constituting from about 40% to about 90% by weight of said oligomer, each end of said oligomer being terminated with a monoethylenically unsaturated addition polymerizable group, from 20% to 50%, based on the total weight of the composition, of a radiation-curable monoethylenically unsaturated monomer having a T g below about 10° C., and from about 2% to about 20%, based on the total weight of the composition, of a monoethylenically unsaturated monomer having a strong capacity for hydrogen bonding.
Claim 2
Dependent Claim
163 words
A radiation-curable liquid coating composition which cures on radiation exposure to form a soft and tough coating comprising, a polyurethane, polyamide or polyurea oligomer having (1) a molecular weight in the range of about 2000 to about 8000; (2) amide, urea or urethane groups in an amount of one such group for every 300 to 900 units of weight, and (3) polyalkylene polyether, polyalkylene polysulfide or polyalkylene polyester groups in which the alkylene moiety contains from 2-6 carbon atoms, said polyether, polysulfide or polyester constituting from about 40% to about 90% by weight of said oligomer, each end of said oligomer being terminated with a monoethylenically unsaturated addition polymerizable group, from 20% to 50%, based on the total weight of the composition, of a radiation-curable monoethylenically unsaturated monomer having a T g below about 10° C., and from about 2% to about 20%, based on the total weight of the composition, of a monoethylenically unsaturated monomer having a strong capacity for hydrogen bonding.
Claim 3
Dependent Claim
28 words
A coating composition as recited in claim 1 in which said oligomer is a polyurethane having a molecular weight in the range of about 2500 to about 6000.
Claim 4
Dependent Claim
18 words
A coating composition as recited in claim 1 in which said alkylene moiety contains from 2-4 carbon atoms.
Claim 5
Dependent Claim
24 words
A coating composition as recited in claim 3 in which said polyether, polysulfide or polyester has a molecular weight of from 300 to 2000.
Claim 6
Dependent Claim
31 words
A coating composition as recited in claim 2 in which said polyurethane contains from 50% to 75% of said polyether, said polyether having a molecular weight of from 300 to 2000.
Claim 7
Dependent Claim
24 words
A coating composition as recited in claim 1 in which said oligomer is a linear polymer terminated at each end with an acrylate group.
Claim 8
Dependent Claim
32 words
A coating composition as recited in claim 6 in which said coating composition is curable with ultraviolet light and contains initiators and/or photosensitizers appropriate for rendering the composition curable by such radiation.
Claim 9
Dependent Claim
33 words
A coating composition as recited in claim 6 in which said oligomer is a diisocyanate-terminated linear polyurethane which is reacted with an hydroxyalkyl acrylate containing from 2-4 carbon atoms in the alkyl group.
Claim 10
Dependent Claim
15 words
A coating composition as recited in claim 8 in which said acrylate is 2-hydroxyethyl acrylate.
Claim 11
Dependent Claim
41 words
A coating composition as recited in claim 6 in which said oligomer is a diisocyanate-terminated linear polyurethane reacted with a half equivalent of 2-hydroxyethyl acrylate to provide a monoethylenic monoisocyanate which is tied together by reaction with a difunctional chain-extending agent.
Claim 12
Dependent Claim
25 words
A coating composition as recited in claim 10 in which said chain-extending agent is selected from diamines, diols, amino alcohols, dithiols, diacids and hydroxy acids.
Claim 13
Dependent Claim
23 words
A coating composition as recited in claim 1 in which said monomer of low T g has a T g below 0° C.
Claim 14
Dependent Claim
31 words
A coating composition as recited in claim 1 in which said monomer of low T g is a phenoxy alkyl acrylate in which the alkyl group has from 2-4 carbon atoms.
Claim 15
Dependent Claim
26 words
A coating composition as recited in claim 1 in which polyoxypropylene glycol having a molecular weight of from 600 to 1200 is incorporated into said oligomer.
Claim 16
Dependent Claim
17 words
A coating composition as recited in claim 1 in which said hydrogen bonding monomer is vinyl pyrrolidone.
Claim 17
Dependent Claim
131 words
A radiation-curable liquid coating composition which cures on radiation exposure to form a soft and tough coating comprising, a polyurethane oligomer diacrylate, said oligomer having (1) a molecular weight in the range of 2500 to 6000; (2) urethane groups in an amount of one such group for every 400 to 600 units of weight; and (3) polyoxypropylene groups having a molecular weight of from 300 to 2000, said polyoxypropylene component constituting from 50% to 75% by weight of said oligomer, from 20% to 50%, based on the total weight of the composition, of a radiation-curable monoethylenically unsaturated monomer having a T g below about 0° C., and from 3% to 10%, based on the total weight of the composition, of a monoethylenically unsaturated monomer having a strong capacity for hydrogen bonding.
Claim 18
Dependent Claim
131 words
A radiation-curable liquid coating composition which cures on radiation exposure to form a soft and tough coating comprising, a polyurethane oligomer diacrylate, said oligomer having (1) a molecular weight in the range of 2500 to 6000; (2) urethane groups in an amount of one such group for every 400 to 600 units of weight; and (3) polyoxypropylene groups having a molecular weight of from 300 to 2000, said polyoxypropylene component constituting from 50% to 75% by weight of said oligomer, from 20% to 50%, based on the total weight of the composition, of a radiation-curable monoethylenically unsaturated monomer having a T g below about 0° C., and from 3% to 10%, based on the total weight of the composition, of a monoethylenically unsaturated monomer having a strong capacity for hydrogen bonding.
Claim 19
Dependent Claim
27 words
A radiation-curable liquid coating composition as recited in claim 16 in which initiators and/or photosensitizers are present to render the composition curable by exposure to ultraviolet light.
Claim 20
Dependent Claim
19 words
A radiation-curable liquid coating composition as recited in claim 16 in which said hydrogen bonding monomer is vinyl pyrrolidone.
References Cited (Backward Citations)
US3297745A
Cited
US4097439A
Cited
US4129709A
Cited
US4108840A
Cited
US4316974A
Cited
US4153776A
Cited
US4246379A
Cited
US4198200A
Cited
US4232133A
Cited
US4330657A
Cited
US4260703A
Cited
US4254230A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |