Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1987-11-13
1988-09-27
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 17, 427 541, 427164, B29D 1100
Patent
active
047740353
ABSTRACT:
An abrasion-resistant coated plastic lens element and a method for coating the element with an abrasion-resistant coating includes forming a coating on a face of a mold that is substantially cured and adherable to lens-forming material. The coating composition consists of reactants, approximately 70% to 95% of which have at least triacrylate functionality and approximately 5% to 30% of which have diacrylate functionality, a photoinitiator, a polymerization inhibitor reactive with oxygen, and a silane adhesion promoter and an acid to activate the silane adhesion promoter. The coating is applied to the face of the mold to form a substantially uniform coating and is then subjected to ultraviolet light in an ambient oxygen-containing environment such that a hard abrasion-resistant coating is formed on the mold. The mold is then filled with a lens-forming composition which is reactive with acrylate groups of the coating at a coating/lens interface. The lens-forming composition is permitted to cure in the mold to form a lens having a hard abrasion-resistant coating. No further post curing treatment is required since the lens leaves the mold at its maximum cure, hardness, and abrasion resistance.
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Carmelite Donald D.
Peralta Joseph L.
Smith Timothy J.
Camelot Industries Corporation
Lowe James
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