Abrasion-resistant lenses and process of making

Details Abrasion-resistant lenses and process of making Abrasion-resistant lenses and process of making

1977-01-24

1978-11-28

Ansher, Harold

Stock material or miscellaneous articles

Composite

Of polycarbonate

350175NG, 351166, 428409, 428447, 428913, G02B 110, G02C 702, B32B 702, B32B 2706

Patent

active

041276973

ABSTRACT:
Plastic substrates of optical elements having surfaces coated with the abrasion-resistant coating compositions described in U.S. Pat. No. 3,986,997 are improved by utilizing a tie-coat comprising an A-alkylenealkoxysilane where A contains a group reactive with the substrate. For some substrates, particularly polycarbonate lenses, the coating process is substantially simplified by reducing criticality of conditions when the tie-coat of the present invention is used than when the process of the aforementioned patent is followed with the tie-coats conventionally used and disclosed therein.

REFERENCES:
patent: 3484157 (1969-12-01), Crandon et al.
patent: 3953115 (1976-04-01), French et al.
patent: 3971872 (1976-07-01), Leboeuf
patent: 3986997 (1976-10-01), Clark
patent: 4006271 (1977-02-01), French et al.
patent: 4024306 (1977-05-01), Takamizawa
patent: 4027072 (1977-05-01), Molari
patent: 4027073 (1977-05-01), Clark
patent: 4040882 (1977-08-01), Legrand et al.
patent: 4049867 (1977-09-01), Ko et al.
patent: 4049868 (1977-09-01), Laurin et al.

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