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AssigneeEcosynthetix Ltd.
InventorsSomaieh Salehpour, J. Douglas Ireland, Niels M. B. Smeets, Steven Bloembergen, Michael Kuska
Estimating the term…
A binder has at least one isocyanate and at least one biopolymer mixed with water. The biopolymer may be a biopolymer nanoparticle or cooked and chemically modified starch. Optionally, the binder may also include urea. The biopolymer and water are mixed, and the isocyanate is added to the mixture. The binder may have a viscosity that is suitable for being sprayed on a substrate to make a composite material, for example a viscosity of 700 cP or less or 500 cP or less at 40° C. The substrate may be wood, another lignocellulosic material, or synthetic or natural fibers. In particular examples, the binder is used to make no added formaldehyde wood composites including particle board and fiberboard. Alternatively, the binder may have a higher viscosity and be used to make plywood.
A composition comprising isocyanate, water and biopolymer, wherein the composition excluding the water, wood and isocyanate, comprises at least 80% by weight of one or more of starch hydrogel particles, starch nanoparticles, modified starch having a molecular weight of 1,000,000 Da or less, and cold water soluble starch.
A method for making a composite material wherein a binder comprising an isocyanate, a biopolymer and water is sprayed on a substrate and cured by heat applied to the binder and substrate mixture, wherein either the isocyanate, biopolymer and water are mixed together before being applied to the substrate or the isocyanate component is applied separately from the biopolymer component.
Dependencies are inferred from the claim text.