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EP0209641A2
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EP
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Ultraviolet curable coatings for optical glass fiber base on a polyfunctional core
Assignee: DSM BV
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Filing: 1986-04-14
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Granted: —
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Expires: 2006-04-14
Abstract
Abstract An ultraviolet curing liquid coating composition which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a coating adapted for the coating of optical glass fiber. This coating composition comprises as the essential component, an acrylate-terminated polyurethane oligomer based on a polyfunctional core which is at least trifunctional and which supports one branch for each functionality in the core. Each of the branches leads to an acrylate-functional terminal group, with there being from about 150 to about 2500 units of molecular weight in each branch between the trifunctional core and the acrylate-functional terminal group. Depending primarily upon the molecular weight of the branches, one can provide coating compositions for buffer coat, single coat or topcoat use.
Inventors
- 👤 John J. Krajewski
- 👤 Timothy E. Bishop
- 👤 Clive J. Coady
- 👤 John M. Zimmerman
- 👤 Gerry K. Noren
- 👤 Christopher E. Fisher
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 20:00
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/67; C08G18/671; C08G18/672; C03; C03C; C03C25/00; C03C25/10; C03C25/104; C03C25/106; C03C25/1065; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5024; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G18/7831; C08G18/79; C08G18/791; C08G18/792; C08G18/81; C08G18/8141; C08G18/815; C08G18/8158; C08G18/8175
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
96 words
An ultraviolet curing liquid coating composition which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a coating adapted for the coating of optical glass fiber, said coating composition comprising, as the essential component, an acrylate-terminated polyurethane oligomer based on a polyfunctional core which is at least trifunctional and which supports one branch for each functionality in said core, each of said branches leading to an acrylate-functional terminal group, there being from about 150 to about 2500 units of molecular weight in each branch between said core and said acrylate-functional terminal group.
Claim 2
Dependent Claim
96 words
An ultraviolet curing liquid coating composition which, when cured with ultraviolet light in the presence of an appropriate photoinitiator, provides a coating adapted for the coating of optical glass fiber, said coating composition comprising, as the essential component, an acrylate-terminated polyurethane oligomer based on a polyfunctional core which is at least trifunctional and which supports one branch for each functionality in said core, each of said branches leading to an acrylate-functional terminal group, there being from about 150 to about 2500 units of molecular weight in each branch between said core and said acrylate-functional terminal group.
Claim 3
Dependent Claim
44 words
An ultraviolet curing liquid coating composition as recited in claim 1 in which said oligomer is the reaction product of organic polyisocyanate with compound having a plurality of isocyanate-reactive functional groups, one of the foregoing being at least trifunctional, and the remainder being difunctional.
Claim 4
Dependent Claim
29 words
An ultraviolet curing liquid coating composition as recited in claim 2 in which said core is trifunctional and is selected from the group consisting of triamines, triols and triisocyanates.
Claim 5
Dependent Claim
40 words
An ultraviolet curing liquid coating composition as recited in claim 3 in which said trifunctional component is provided by a triol or a triamine which is reacted with difunctional compounds including an organic diisocyanate to provide the desired branch length.
Claim 6
Dependent Claim
22 words
An ultraviolet curing liquid coating composition as recited in claim 4 in which said trifunctional component is a tris-polyoxypropylene amine-trimethylol propane ether.
Claim 7
Dependent Claim
20 words
An ultraviolet curing liquid coating composition as recited in claim 1 in which said branches are terminated with monoacrylate groups.
Claim 8
Dependent Claim
35 words
An ultraviolet curing liquid coating composition as recited in claim 1 in which the molecular weight of said branches is from about 150 to about 700, and said coating composition is adapted for topcoat use.
Claim 9
Dependent Claim
36 words
An ultraviolet curing liquid coating composition as recited in claim 1 in which the molecular weight of said branches is from about 350 to about 1500, and said coating composition is adapted for single coat use.
Claim 10
Dependent Claim
36 words
An ultraviolet curing liquid coating composition as recited in claim 3 in which the molecular weight of said branches is from about 1000 to about 2500, and said coating composition is adapted for buffer coat use.
Claim 11
Dependent Claim
51 words
An ultraviolet curing liquid coating composition as recited in claim 9 in which said composition, when cured with ultraviolet light, has a ratio of the modulus at -60°C. to the modulus at 25°C. of less than 300 and said coating composition cures to provide an index of refraction is about 1.54-1.55.
References Cited (Backward Citations)
No citation records indexed.
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