Method of producing an optical material and optical material
AssigneeEssilor International
InventorsJianwei ZHANG, Laurent CHIPPAUX
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Abstract
A method of producing an optical material, wherein a polymerizable composition intended to polymerize to form the optical material comprises: a) monomeric compounds adapted to polymerize, b) at least one catalyst for initiating the polymerization of said monomeric compounds, and c) from more than 1,500 ppm to 3,000 ppm of a release agent, as compared to the total weight of the polymerizable composition, and wherein said polymerizable composition is polymerized under a polymerization cycle including a plurality of steps, the global duration of the polymerization cycle being of less than 19 hours.
Claims15
A method of producing an optical material, wherein a polymerizable composition intended to polymerize to form the optical material comprises:
- a) monomeric compounds adapted to polymerize;
- b) at least one catalyst for initiating the polymerization of said monomeric compounds;
- and
- c) from more than 1,500 ppm to 3,000 ppm of a release agent, as compared to the total weight of the polymerizable composition;
- wherein said polymerizable composition is polymerized under a polymerization cycle including a plurality of steps, the global duration of the polymerization cycle being of less than 17 hours.
Dependencies are inferred from the claim text.