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NANOCOMPOSITES BASED ON POLYURETHANE OR POLYURETHANE-EPOXY HYBRID RESINS PREPARED AVOIDING ISOCYANATES
NANOCOMPOSITES BASED ON POLYURETHANE OR POLYURETHANE-EPOXY HYBRID RESINS PREPARED AVOIDING ISOCYANATES
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机译：基于聚氨酯或聚氨酯-环氧杂化树脂制备的避免异氰酸酯的纳米复合材料
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摘要
A fast curable non-isocyanate-based polyurethane- and polyurethane-epoxynetwork nanocomposite polymeric compositions are derived upon crosslinking amixture comprising of natural or modified nano-clay [ionic phyllosilicate]with platelet thickness in the scale of A (~1 nm) and aspect ratio(length/thickness) higher than 10 (nm)] preferably natural or modifiedmontmorillonite with either a monomer(s) or oligomer(s) bearing at least onecyclocarbonate group or a mixture of the latter with an epoxy resin, with ahardener, which is a monomer or oligomer or mixtures therefrom, bearingprimary and/or secondary amino groups.The use of the nanoclays reduces the geltime and increases the adhesion of the cured polyurethane andpolyurethane/epoxy hybrid and also reduces its water absorption.
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