Compositions – Light transmission modifying compositions – Displaying color change
Patent
1994-06-09
1995-02-21
Tucker, Philip
Compositions
Light transmission modifying compositions
Displaying color change
G02B 523
Patent
active
053913272
ABSTRACT:
Photochromic optical articles of improved resistance to light fatigue are provided by the use of a combination of hindered amine light stabilizer and asymmetric diaryloxalamide light stabilizer with a mixture of (1) photochromic material having a minima luminous transmission in the range of 560 to 630 nanometers and (2) photochromic material having a minima luminous transmission in the range of 430 to 520 nanometers.
REFERENCES:
patent: 3562172 (1971-02-01), Ono et al.
patent: 3578602 (1971-05-01), Ono et al.
patent: 3906041 (1975-09-01), Hofer et al.
patent: 4215010 (1980-07-01), Hovey et al.
patent: 4342668 (1982-08-01), Hovey et al.
patent: 4637698 (1987-01-01), Kwak et al.
patent: 4720356 (1988-01-01), Chu
patent: 4816584 (1989-03-01), Kwak et al.
patent: 4818096 (1989-04-01), Heller et al.
patent: 4826977 (1989-05-01), Heller et al.
patent: 5066818 (1991-11-01), Gemert et al.
"New Anti-UV-Stabilizers for Automotive Coatings"; Sandoz Chemicals, by L. Avar et al, 2-284/88.
"Sanduvor.RTM. Ultraviolet Absorbers and Light Stabilizers for Coatings", Sandoz Chemicals, 2-242/90.
"Sanduvor.RTM. VSU Powder", Product Bulletin, Sandoz Chemicals 2-117/90.
Ligas John S.
Misura, Jr. Michael S.
Welch Cletus N.
Stein Irwin M.
Transitions Optical Inc.
Tucker Philip
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