| 摘要 |
<p>A photosensitive ceramic coating composition which is fireable in a substantially nonoxidizing atmosphere comprising an admixture of: (a) finely divided particles of ceramic solids having a surface area-to-weight ratio of no more than 10 m<2>/g and at least 80 wt. % of the particles having a size of 1-10 mu m, and (b) finely divided particles of an inorganic binder having a glass transition temperature in the range from of 550 to 825 DEG C, a surface area-to-weight ratio of no more than 10 m<2>/g and at least 90 wt. % of the particles having a size of 1-10 mu m, the weight ratio of (b) to (a) being in a range from 0.6 to 2, dispersed in an organic medium comprising (c) an organic polymeric binder, and (d) a photoinitiation system, dissolved in (e) photohardenable monomer, and (f) an organic medium wherein the improvement comprises an organic polymeric binder containing a copolymer or interpolymer of a C1-C10 alkyl acrylate, C1-C10 methacrylate, styrene, substituted styrene or combinations thereof and an ethylenically unsaturated carboxylic acid, wherein a moiety in the binder derived from the unsaturated carboxylic acid comprises at least 15 weight percent of the polymer and wherein the binder has a molecular weight not greater than 50,000 and wherein the composition upon imagewise exposure to actinic radiation is developable in an aqueous solution containing 1 percent by weight sodium carbonate.</p> |
