Loading patent…
OwnerGabor I. Koletar, Major S. Dhillon +3inventors
InventorsGabor I. Koletar, Major S. Dhillon, Mahfuzul Alam, Gerhard Sprintschnik, Stanley F. Wanat
Estimating the term…
A method for producing polymers which are anhydride modifications of polymers containing hydroxyl groups, such as polyvinyl acetal polymers. Such modified polymers are useful as binders for photosensitive compositions used to prepare photographic elements such as lithographic printing plates, color proofing films and photoresists. The binder is the reaction product of an intramolecular anhydride of an organic polycarboxylic acid with a polymer containing hydroxyl groups, and which does not contain other functional groups which are capable of reaction with acid anhydrides. The reaction is conducted in a solvent composition free of hydroxyl containing solvents such as methyl ethyl ketone and ethylene glycol monomethyl ether.
A method for the preparation of a modified polymer which is useful as a binder for photosensitive compositions, the method comprising dispersing a hydroxy containing polymer in a sufficient amount of a non-hydroxy containing solvent composition which is free of methyl ethyl ketone and ethylene glycol monomethyl ether, to uniformly disperse the hydroxy containing polymer under conditions such that the solvent composition does not emit an amount of combustible vapors, which when mixed with air exceeds 25% of the lower explosive limit of the solvent composition;
A method of producing a photosensitive composition which comprises
A method of producing a photographic image which comprises
Dependencies are inferred from the claim text.