Back to results
US 11,028,214 B2Granted
Synthesis of oligomer for optical fiber coating
AssigneeCorning Incorporated
InventorsYangbin Chen, Bin Yang
Life of this patent
Estimating the term…
Abstract
A method for making oligomers is described. The method includes reacting a polyol with a precursor having mixed functionality. The precursor includes a curable functional group and an isocyanate group capable of reacting with an alcohol group of the polyol. The precursor reacts with the alcohol group of the polyol to form a urethane linkage and to add a covalently bonded curable functional group to the polyol. The oligomers can be included in coating compositions for optical fiber and lead to coatings having improved tear strength.
Claims15
A method for making an oligomer, comprising:
- reacting a first precursor with a first polyol, a second polyol, and a first diol;
- wherein the first precursor reacts with the first polyol to form a first urethane compound, the first polyol including two or more OH groups and a repeating alkoxylene group, the first precursor including an isocyanate group and a curable functional group;
- and
- wherein the first precursor reacts with the second polyol to form a second urethane compound, the second polyol including two or more OH groups and a repeating alkoxylene group, wherein a molecular weight of the first polyol is greater than a molecular weight of the second polyol by at least 2500 g/mol;
- and
- wherein the first precursor reacts with the first diol to form a third urethane compound;
- and
- wherein a ratio of a molar amount of the first polyol to a molar amount of the first diol is greater than 10:1.
5 more elements
A coating composition comprising:
- an oligomer, the oligomer comprising a first urethane compound, the first urethane compound formed from a reaction of a first polyol with a first precursor, the first polyol including two or more OH groups and a repeating alkoxylene group, the first precursor including an isocyanate group and a curable functional group, the oligomer further comprising a second urethane compound, the second urethane compound formed by a reaction of the first precursor with a second polyol, the second polyol including two or more OH groups and a repeating alkoxylene group, the second polyol and the first polyol differing in molecular weight by at least 2000 g/mol, the oligomer further comprising a third urethane compound, the third urethane compound formed by a reaction of the first precursor with a first diol, a ratio of a molar amount of the first polyol to a molar amount of the first diol being greater than 10:1 in the coating composition;
- and
- a photoinitiator.
Dependencies are inferred from the claim text.