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US 4,186,017 AGranted
Light-sensitive copying composition
AssigneeHoechst Aktiengesellschaft
InventorRoland Palmer
Life of this patent
Estimating the term…
Abstract
This invention relates to a light-sensitive copying composition comprising a diazonium salt condensation product, a stabilizer, and a polyurethane prepolymer with free terminal isocyanate groups.
Claims10
A negative-working light-sensitive copying composition comprising a light-sensitive diazonium salt condensation product, an acid stabilizer, and a polyurethane prepolymer having from about 1 to 30 percent by weight of free terminal isocyanate groups.
Dependencies are inferred from the claim text.