Process for coating a lens of synthetic polymer with a durable a

Details Process for coating a lens of synthetic polymer with a durable a Process for coating a lens of synthetic polymer with a durable a

1974-09-30

1976-11-09

Smith, Ronald H.

Coating processes

Optical element produced

Transparent base

427248C, 427248J, 427296, 427322, 428412, 350175NG, 351166, B05D 310, B05D 500

Patent

active

039912345

ABSTRACT:
There is disclosed a process for improving the adhesion of an evaporable glass coating on a synthetic polymer lens by the application of a base vitreous coating of a mixture of silicon dioxide and silicon monoxide by evaporating silicon monoxide under vacuum in an oxygen atmosphere so that in addition to silicon monoxide, a silicon dioxide condensate is condensed on the outer surface of the lens. An outer vitreous coating is subsequently applied over said base coating. The evaporative glass outer coating can be formed essentially from boron oxide and silicon dioxide containing less than 5% by weight of sodium oxide. The evaporative glass coating can also be of fused silica, or a boro-silicate glass sold under the trademark "Pyrex".

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patent: 3200019 (1965-08-01), Scott, Jr. et al.
patent: 3356522 (1967-12-01), Libbert
patent: 3458342 (1969-07-01), Cormia
patent: 3546013 (1970-12-01), Perri et al.
patent: 3567686 (1971-03-01), White et al.
patent: 3607378 (1971-09-01), Ruggiero
patent: 3645779 (1972-02-01), Klenel
patent: 3652379 (1972-03-01), White et al.
patent: 3681132 (1972-08-01), Pammer et al.
patent: 3700487 (1972-10-01), Crandon et al.

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