Abstract: A heterogeneous two component waterborne urethane/vinyl polymer composition, the method of making the composition, and the coating derived therefrom. The composition is a low or zero VOC composition containing a polyol stabilized non-functional, high Tg, aqueous vinyl polymer latex, a water dispersible polyisocyanate, and, optionally, a polyhydric alcohol. The composition is formed by emulsion polymerizing one or more vinyl monomers which will form a high Tg polymer, in the presence of an emulsifier containing one or more acid-containing polyols which have been neutralized with one or more reactive amines, and combining the resulting polyol-stabilized high Tg aqueous vinyl polymer latex with a water-dispersible polyisocyanate and, optionally, a polyhydric alcohol.

Abstract: The present invention is directed to improved aqueous dispersions containing polyurethane/vinyl polymers. The improved aqueous dispersions comprise polymer particles of a urethane prepolymer having carboxyl functionality therein and a vinyl monomer polymerized thereon, which are shelf stable and self crosslinkable at a low temperature. The polyurethanes have pendant carboxyl functionality in quaternary form and pendant epoxide groups provided by glycidyl acrylates and/or methacrylates. When the aqueous dispersions are cast as film and the water is removed, crosslinking between the carboxyl group and the epoxide group occurs.

Abstract: An improved two component coating system based upon crosslinkable hydroxy containing polymers and a polyisocyanate crosslinker. The improvement resides in the utilization of a water-borne hydroxy-terminated polyurethane prepolymer/acrylate hybrid, preferably a hydroxy acrylate hybrid, in combination with a water-dispersible polyisocyanate.

Abstract: This invention relates to improved water-based polymeric dispersions having suitability for coatings and other applications which are based upon polymers having a plurality of acetoacetate functional groups and a crosslinkable component comprising a plurality of aromatic aldimine. The basic acetoacetate/benzaldimine containing system comprises an aqueous polymeric dispersion wherein the polymer has a plurality of acetoacetate groups and an effective amount of a curing agent having a plurality of benzaldimine functional groups. The improvement in providing for water-stable polymeric dispersions suitable for coatings and other applications comprises an aqueous dispersion comprising a polymeric component preferably derived from a plurality of polymerizable ethylenically unsaturated monomer units having pendant araldimine or heterocyclic aldimine functionality. Acetoacetate containing monomers generally are used in forming the polymer and a preferred monomer acetoacetoxyethymethacrylate.

Abstract: The present invention is directed to improved aqueous dispersions containing polyurethane/vinyl polymers and to a method for making such aqueous polyurethane-vinyl polymer dispersion. The aqueous dispersions comprise a urethane prepolymer having carboxyl functionality therein and a vinyl monomer polymerized therewith. The improvement in these dispersions resides in shelf-stability and self crosslinkability at low temperature with the polyurethanes having the carboxyl functionality in quaternary form and such dispersions containing polymer having pendant epoxide groups. When the aqueous dispersions are cast as a film and the water removed, crosslinking between the carboxyl group and epoxide group occurs.

Abstract: This invention relates to improved crosslinking systems for polymeric dispersions and solutions having suitability for coatings, adhesives and use in many other applications. These systems are based upon crosslinkable polymers having a plurality of activated keto methylene groups, e.g., a beta diketone such as an acetoacetate or a keto cyano methylene functional groups and a crosslinkable component comprising an aldimine. A sufficient amount of the aldimine curing agent is used to effect reaction with the polymer containing the activated keto methylene groups and cure thereof. The improvement in the crosslinking system resides in the utilization of a monoaldimine having only one aldimine group and no other methylene reactive group as a crosslinking agent. Another improvement variation to that previously suggested comprises a redispersible polymer(s) containing activated methylene functionality and combined with the monoaldimine and the use of heterocyclic aldimine.

Abstract: Polymeric membranes derived from aromatic polyarylates formed from nitrated dicarboxylic acid chlorides and cardo bisphenol having halo-substituents on all portions ortho to the hydroxyl groups are provided which exhibit high gas permselectivities.

Abstract: The present invention is a class of polymeric membranes formed from aromatic polyamides derived from dicarboxylic acid chlorides and cardo diamines having alkyl substituents on all portions ortho to the amine functions. These polyamide membranes exhibit high gas permselectivities and are useful in various gas separation applications.

Abstract: The present invention is a class of polymeric membranes formed from aromatic polyarylates derived from dicarboxylic acid chlorides and conformationally rigid cyclohexyl bisphenols having halo or methyl substituents on all positions ortho to the hydroxy functions. These polarylate membranes exhibit high gas permselectivities and are useful in various gas separation applications.

Abstract: The present invention is a class of polymeric membranes formed from aromatic polyarylates derived from dicarboxylic acid chlorides and cardo bisphenols having halo substituents on all portions ortho to the hydroxy functions. These polyarylate membranes exhibit high gas permselectivities and are useful in various gas separation applications.