General Electric Company

Michael W Brown

Philippe Schottland

Steven Richard Peak

Douglas G Hamilton

Jeremy David Hurst

David Rosendale

Theodorus J M Timmerman

Rodney L Michel

John G Skabardonis

The present invention is drawn to a transparent or translucent thermoplastic composition comprising a thermoplastic polycarbonate resin and a phosphorescent phosphor with an aluminate matrix expressed by MAl O in which M is calcium, strontium or barium. Said phosphorescent phosphor is present in a quantity of 0.01 to 2.0% by weight with respect to the quantity of polycarbonate resin and possesses a median particle size of less than 10 micrometer. Forming an object by injection molding using said transparent or translucent thermoplastic composition is also disclosed.

Phosporescent polycarbonate and molded articles

Phosporescent polycarbonate, concentrate and molded articles

Polymer composition comprising 50-99% by weight of a thermoplastic resin or a blend of thermoplastic resins, 1-50% by weight of a graft copolymer comprising a rubbery graft base upon which one or more monomers have been grafted, the quantities of (a) and (b) being calculated with respect to the sum of (a) and (b) taken together; and a phosphorescent pigment with an aluminate matrix expressed by M-Al, in which M is at least one metal element selected from calcium, strontium and barium and Al represents an aluminate group. The aluminate group can be for example a Al O -group. The invention also relates to concentrates that are suitable for making the polymer composition of the invention.

Phosphorescent thermoplastic composition

Polychromic articles are manufactured by solvent casting polycarbonate resins previously mixed with a photochromic dye and evaporating the solvent. The films produced can be insert injection molded with polycarbonate substrates to obtain photochromic articles.

Polycarbonate articles with photochromic properties

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Mt. Vernon, IN, United States of America

Michael W Brown