Method for forming optically smooth polymeric layers

Details Method for forming optically smooth polymeric layers Method for forming optically smooth polymeric layers

B - Operations, Transporting

05

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117/107

B05D 3/02 (2006.01) B05D 5/06 (2006.01) G11B 7/257 (2006.01) G11B 7/26 (2006.01)

Patent

CA 1261212

TITLE METHOD FOR FORMING OPTICALLY SMOOTH POLYMERIC LAYERS Abstract A method foe forming an optically smooth layer on a substrate comprising the sequential steps of: a. applying to the substrate a layer of a flowable Newtonian liquid composition comprising (1) a film-forming polymer, and (2) a mutually soluble thermally activatable liquid cross-linking agent, both dissolved in (3) a volatile organic solvent: b. raising the temperature of the flowable liquid layer to a temperature below the activation temperature of the cross-linking agent by which the thickening of the layer is reduced but the layer remains flowable at the raised temperature. c. raising the temperature of the flowable layer to a level above the activation temperature to initiate cross-linking and to effect removal of solvent by evaporation and to induce polymer flow: and d. heating the solvent-free flowed polymer solution layer to effect cross-linking of the polymer solution to an extent that the solution of polymers becomes thermoset.

522877

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