Stock material or miscellaneous articles – Composite – Of polycarbonate
Patent
1975-12-29
1977-09-20
Hoffman, James R.
Stock material or miscellaneous articles
Composite
Of polycarbonate
428446, 428447, 428451, 428452, G02B 110, G02B 104, B32B 2708, B32B 2308
Patent
active
040498689
ABSTRACT:
An abrasion-resistant organic optical element comprising a transparent base of a synthetic organic material having an adhering coating of an abrasion-resistant material comprising a polysilicic acid ester of an alcohol containing from 1 to 12 carbon atoms and a partially hydrolyzed vinyl polymer to provide polyvinyl alcohol; the coating being cross-linked with formaldehyde or zirconyl nitrate or mixtures thereof. The abrasion-resistant organic optical elements can comprise sheet material or a lens.
REFERENCES:
patent: 3652379 (1972-03-01), White et al.
patent: 3953115 (1976-04-01), French et al.
patent: 3971872 (1976-07-01), Le Boeuf
Crandon Harry D.
Laurin Bernard L.
Rotenberg Don H.
American Optical Corporation
Berkenstock, Jr. H. R.
Hoffman James R.
Nealon William C.
Spencer Alan H.
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