Polyurethane based adhesive for polarizing structure and polarized lens
AssigneeEssilor International (Compagnie Generale d'Optique)
InventorsRonald A. BERZON, Aref JALLOULI
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Abstract
A polyurethane based adhesive containing one polyol compound derived from caprolactone monomer having a number average molecular weight between 200 and 1000 combined with a polyisocyanate compound. The functionality of the polycaprolactone polyol is between 1 and 4. Other aspects include a polarizing layered structure, a polarized lens and a method for manufacturing same all of which include the polyurethane based adhesive. The adhesive avoids delamination and is useful in optical applications where it will be in contact with water, for example during surfacing or edging process.
Claims15
A polyurethane based adhesive obtained by reacting at least one polyisocyanate compound with at least one polyol compound derived from caprolactone monomer having a number average molecular weight more than 200 and less than 1000.
Dependencies are inferred from the claim text.