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US 2003/0191235 A1Published application
Water curable polyurethane compositions and uses thereof
AssigneeLaxmi C. Gupta
InventorLaxmi C. Gupta
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AssigneeLaxmi C. Gupta
InventorLaxmi C. Gupta
Estimating the term…
Increased health, safety, and environmental awareness motivated the development of new and improved water curing technology for formulating, manufacturing, and using water curable compositions (also referred to in the art as water induced urethanes). The present invention is based, at least in part, upon the concept of formulating NCO functional resins used in water curable compositions from one or more polyisocyanate constituents that comprise at least one sterically hindered isomer of diphenyl methane diisocyanate (MDI). These isomers have a combination of exceptionally low vapor pressure and suitable moisture reactivity that lead to numerous advantages. Due to their low volatility, these isomers may be substituted for all or a portion of the TDI content of a conventional water induced urethane formulation. Particularly preferred embodiments eliminate any TDI, have 100% solids, are solvent free, and are characterized by essentially zero VOC emissions with respect to isocyanate. The compositions are substantially more environmentally friendly than conventional formulations.
A water curable composition, comprising an NCO-functional resin derived from ingredients comprising:
A water curable composition, comprising:
A method of formulating a water curable composition, comprising the step of incorporating a plasticizer into a formulation for the composition based upon information comprising data indicative of an anti-foaming characteristic of the plasticizer.
A method of formulating a water curable composition, comprising the step of incorporating a first and second polyisocyanate compound into a formulation for the composition based upon information comprising data indicative of a foaming characteristic of the composition upon being cured as a function of the relative amounts of the first and second polyisocyanate compounds included in the formulation.
A method of making a water curable composition comprising an NCO-functional resin comprising:
A method of making a water curable composition comprising:
A method of using a water-curable composition, comprising the steps of:
Dependencies are inferred from the claim text.