Plastic and nonmetallic article shaping or treating: processes – Optical article shaping or treating – Utilizing plasma – electric – electromagnetic – particulate – or...
Patent
1990-01-05
1991-09-17
Lowe, James
Plastic and nonmetallic article shaping or treating: processes
Optical article shaping or treating
Utilizing plasma, electric, electromagnetic, particulate, or...
264 17, 522 48, 522182, 522902, 523106, B29D 1100
Patent
active
050493213
ABSTRACT:
A method for coating a plastic lens element including applying a coating composition consisting substantially of reactants having at least triacrylate functionality, a photo-initiator and a polymerization inhibitor reactive with oxygen to the face of a mold. The coating is subjected to ultraviolet light in an oxygen containing environment such that a hard abrasion-resistant coating is formed. The mold is then filled with a lens forming composition which is reactive with acrylate groups of the coating at the coating/lens interface. The lens forming composition is permitted to cure in the mold with the lens forming composition being bonded to the lens coating.
REFERENCES:
patent: 4544572 (1988-06-01), Sandrig et al.
patent: B14544572 (1988-06-01), Sandrig et al.
Lowe James
Signet Armorlite, Inc.
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Method for forming coated plastic optical elements has received 1 rating(s) and 1 review(s), resulting in an average rating of 4.10 on a scale from 1 to 5. The overall rating for this patent is very good.
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MaryAnn Tompkins Galic
if you look this patent up on the US Patent Office's web site, you'll see that 81 subsequent US Patents have cited it as "Prior Art" to their invention.....few inventions have so many such Citations secondly, millions of Rx spectacle lenses were made in the 1980s-90s under license of this patent now expired, this patent "taught how-to" which is still used overseas (e.g. India & China)
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