Tungsten hexacarbonyl in plastic lenses

Compositions – Inorganic luminescent compositions – Tungsten containing

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350160P, G02B 523

Patent

active

040691683

ABSTRACT:
Tungsten hexacarbonyl acts as a photochromic agent and an infrared absorber when incorporated in liquid allyl glycol carbonates, such as allyl diglycol carbonate, and polymerizates thereof. Photochromic, infrared-absorbing optical and ophthalmic lenses containing tungsten derived from tungsten hexacarbonyl are made.

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Massey, A. G., "A Reversible Photochromic Polymer," Nature, vol. 191, No. 4796, Sept. 30, 1961, p. 1387.
M. A. El-Sayed, "A New Class of Photochromic Substances: Metal Carbonyls," J. Phys. Chem., 68, 433 (1964).

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