Optical fibre coatings and method for producing same
AssigneeZeneca Limited
InventorsMartin R. Edwards, Julie A. Waller, Stephen Byrne
Life of this patent
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Abstract
The use of an ethylenically-terminated urethane oligomer for the provision of a radiation-cured coating material of an optical fiber, the urethane oligomer being derived from reactants which include a hydroxyl-terminated polyester polyol having dimer acid residues in its structure.
Claims15
The method of making a radiation cured fiber coating which comprises using an ethylenically-terminated urethane oligomer for the provision of a radiation-cured coating material of an optical fiber, said urethane oligomer being derived from reactants which include a hydroxyl-terminated polyester polyol which has been made by polymerising an acid-component and hydroxyl-component and which has dimer acid residues in its structure, wherein said dimer acid residues are residues derived from (a) the use of a dimer acid as at least part of the acid component or (b) the use of the diol derivative of a dimer acid as at least part of the hydroxyl component or (c) a combination of (a) and (b).
A coated optical fiber having at least one coating of a radiation-cured coating material which has been formed by radiation-curing a radiation-curable coating composition which comprises an ethylenically-terminated urethane oligomer, said urethane oligomer being derived from reactants which include a hydroxyl-terminated polyester polyol which has been made by polymerising an acid-component and a hydroxyl-component and which has dimer acid residues in its structure, wherein said dimer acid residues are residues derived from (a) the use of a dimer acid as at least part of the acid-component or (b) the use of the diol derivative of a dimer acid as at least part of the hydroxyl component or (c) a combination of (a) and (b).
A method for the production of a coated optical fiber, which method comprises applying a radiation-curable coating composition to an optical fiber, which may already have one or more coatings, and radiation-curing the coating composition, and wherein said radiation-curable composition comprises an ethylenically-terminated urethane oligomer, said urethane oligomer being derived from reactants which include a hydroxyl-terminated polyester polyol which has been made by polymerising an acid-component and a hydroxyl-component and which has dimer acid residues in its structure, wherein said dimer acid residues are residues derived from (a) the use of a dimer acid as at least part of the acid-component or (b) the use of the diol derivative of a dimer acid as at least part of the hydroxyl component or (c) a combination of (a) and (b).
Dependencies are inferred from the claim text.