Abstract:
Thiocarbonate compounds which are curable and include at least one polymerizable functional group, preferably an unsaturated functional group. Curable compositions including the polymerizable group containing thiocarbonate compounds are disclosed. In one embodiment, the curable compositions comprise the cureable polymerizable group containing thiocarbonate compounds and a reactive diluent, or a photoinitiator, or a combination thereof, Methods for preparing the curable thiocarbonate compounds, compositions containing the thiocarbonate compounds, and cured compositions are also described. The curable thiocarbonate compounds are useful as coatings, adhesives, and sealants for various substrates such as wood, paper, plastic, metal, or the like.
Abstract:
An anti-static polymer composition comprises a thermoformable, moldable, hybrid urethane-vinyl polymer composition which exhibits relatively low surface and volume resistivities and good toughness. The hybrid polymer composition can be made without volatile organic compounds such as solvents, neutralizing amines, or both.
Abstract:
The flame-retarding properties of polymeric compositions are selectively enhanced, without adversely affecting other properties of these materials to any significant degree, by including in the compositions oligomeric urethanes with high bromine content.
Abstract:
Vinyl polymers formed by bulk or solution polymerization techniques are combined with nanoparticles to produce aqueous dispersions of nanoparticle/vinyl polymer composites.
Abstract:
The water-resistance properties of polyester-based polyurethanes are remarkably enhanced, without adversely affecting the transparency properties of these materials to any significant degree, by including in the polymer a substantially dispersed nano-particle proton scavenger. The hydrolytic stability and water-resistance properties of polyester-based polyurethanes are remarkably enhanced and match those of polycarbonate-based polyurethanes, without adversely affecting the transparency of these materials to any significant degree, by including in the polymer a substantially dispesed nano-particle proton scavenger such as calcium carbonate.
Abstract:
Vinyl chloride polymer compositions, optionally plasticized, containing a hydrophilic polymer (e.g., a hydrophilic polyurethane or hydrophilic vinyl polymer) are described for use as coatings and films with increased moisture vapor transmission and/or static dissipative properties. Films from this material are useful as fluid barriers that allow diffusion of moisture vapors. Similar modifications can be made to acrylate and urethane polymers.
Abstract:
An aqueous cationic polyurethane dispersion for waterborne digital print and other applications comprising an aqueous dispersion of polyurethane having properly positioned tertiary amino groups, e.g., tethered tertiary amino group separated from backbone by at least two intervening atoms or terminal tertiary amino groups with multiple tertiary amino groups per terminus, where said amino groups are optionally partially quaternized and/or neutralized.
Abstract:
A water activated adhesive system is described that is particularly suited for applying non-paper polymeric labels to surfaces which have low moisture permeability. The adhesive system is characterized by a dry non-tacky surface that becomes tacky in less than one second when contacted with a water-based activator. While it is a water activated adhesive, it is also characterized after aging bonded to a substrate by resistance to adhesive failure during 72 hours of immersion in ice/water mixture. The adhesive is beneficial to allow use of existing paper labeling equipment with polymeric labels.
Abstract:
An aqueous dispersion of nanoparticle/polyurethane composites is made by forming a mixture of nanoparticles and a continuous mass of a polyurethane prepolymer in the substantial absence of water and dispersing the mixture so made in aqueous medium. Alternatively, a polyurethane prepolymer or a mixture of nanoparticles and a continuous mass of a polyurethane prepolymer is dispersed into an aqueous dispersion of nanoparticles.
Abstract:
A novel method of preparing an aqueous dispersion of non-uniform polyurethane particles which comprises (a) preparing at least two isocyanate-terminated polyurethane prepolymers having different hydrophilicities; (b) preparing a uniform mixture of said prepolymers; and (c) dispersing the mixed prepolymers in an aqueous medium. The resulting dispersion of the prepolymers may optionally be chain extended. This method enables the preparation of core-shell particles as well as particles of other morphologies, including "raspberry", interpenetrating network, "salt-and-pepper", "ice-cream cone" and particles of gradient composition. Similarly, an aqueous dispersion of two different polyurethane polymers may be obtained by first preparing at least two different isocyanate-terminated polyurethane prepolymers, preparing a uniform mixture of such prepolymers and thereafter dispersing the mixture in an aqueous medium.