Photopolymerizable compositions containing sensitizer mixtures

Details Photopolymerizable compositions containing sensitizer mixtures Photopolymerizable compositions containing sensitizer mixtures

1991-07-19

1992-05-12

Hamilton, Cynthia

Radiation imagery chemistry: process, composition, or product th

Imaging affecting physical property of radiation sensitive...

Radiation sensitive composition or product or process of making

430926, 430920, 430916, 522 26, 522 16, 522 14, G03F 7031

Patent

active

051127210

ABSTRACT:
Combinations of selected photosensitizers produce unexpected increases in the both the photospeed of, and the resolution obtainable from, photopolymerizable compositions. The combinations contain one photosensitizer, known as the sensitizer, and a second photosensitizer, known as the co-sensitizer. The co-sensitizer has an absorbance maximum at a longer wavelength than the sensitizer and is generally present a much lower concentration than the sensitizer.

REFERENCES:
patent: 3652275 (1972-03-01), Baum et al.
patent: 3854950 (1974-12-01), Held
patent: 4162162 (1979-07-01), Dueber
patent: 4268603 (1981-05-01), Sato
patent: 4917977 (1990-04-01), Smothers

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