Method for providing opaque,microcellular,film coatings on substrates and the resultant product
Abstract
Abstract THE DISCLOSED INVENTION RELATES TO FILMS FROM A NOVEL LATEX MIXTURE WHICH ARE NON-POROUS, MICROCELLULAR AND OPAQUE IN THE ABSENCE OF AN OPACIFYING AGENT. THE PREPARATION OF THE FILMS OF THE DISCLOSED INVENTION COMPRISES PROVIDING CONTROL TECHNIQUES FOR ENTRAPPING A SUFFICIENT AMOUNT OF A LIQUID NON-SOLVENT FOR THE POLYMER IN THE POLYMER MATRIX OF A LATEX AFTER THE CONTINOUS PHASE REMOVAL, SO THAT UPON EVAPORATION OF THE NONSOLVENT FROM A COALESCED AND TACK-FREE POLYMER MATRIX, A RESULTING OPAQUE AND CONTINUOUS, NON-POROUS FILM IS PRODUCED WHICH WILL HAVE MINUTE, DISCRETE AND SUBSTANTIALLYCLOSED VOIDS AND WHICH IS OPAQUE IN THE ABSENCE OF AN OPACIFYING AGENT SUCH AS PIGMENT. THE DISCLOSED INVENTION ALSO RELATED TO OPAQUE FILMS WITH ENHANCED OPTICAL PROPERTIES PRODUCED BY THE INCLUSION OF PIGMENTS, FLORESCENT MATERIALS AND OPTICAL BRIGHTENERS IN THE OPAQUE FILMS IN SUCH A MANNER AS TO MAXIMIZE THEIR EFFECTIVENESS THEREIN.
Inventors
- 👤 Jerome A Seiner
Bibliographic Details
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