Minnesota Mining and Manufacturing Company

Southern Lithoplate, Inc.

Kimberly R Kukla

James A Bonham

Richard J Kuo

Leonard Stulc

Stephan J W Platzer

Teresa Baker

Richard C Wax

Ella Ross Ryan

An infrared sensitive, positive-working, image forming composition and element are disclosed. The image forming composition comprises a 1,1-di[(alkylphenoxy)ethoxy]cyclohexane, an infrared absorbing dye having a maximum absorption peak in the range of from about 700 nm to about 1100 nm, and a novolac polymer. The composition is applied and dried on a planar, hydrophilic substrate to form an image forming element, in particular, a planographic printing plate. Upon imagewise exposure to a near-infrared radiation source, the infrared dye absorbs light in the exposed areas and converts it to heat, which causes a disruption in the matrix of the image forming composition. Upon development with an aqueous alkaline developer, the exposed areas are removed while the nonexposed areas remain, thus forming a positive image.

Near-infrared sensitive, positive-working, image forming composition and photographic element containing a 1,1-di[(alkylphenoxy)ethoxy]cyclohexane

Radiation-sensitive polymeric adducts of (1) a sulfonated polyester resin having a plurality of sulfonate groups, (2) a diazonium resin having a plurality of diazonium groups, and (3) a salt of quaternary ammonium or quaternary phosphonium. This invention also provides a radiation-sensitive article comprising a substrate bearing a coating containing a radiation-sensitive adduct.

Radiation-sensitive adducts comprising diazonium cations, quaternary

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Medina, TN, United States of America

Kimberly R Kukla