COATED PROPPANTS CONTAINING HYPERBRANCHED POLYURETHANE COATINGS AND METHODS FOR USING SAME
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United States of America Patent
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Jun 30, 2016
app pub date -
Dec 15, 2015
filing date -
Dec 15, 2015
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Coated proppants that include hyperbranched polyurethane coatings and methods for making and using same. The coated proppant can include a particle and a polyurethane coating at least partially encasing the particle. The polyurethane coating can include a reaction product of a hyperbranched polyol and a polyisocyanate. The hyperbranched polyol can include a reaction product of a chain extender and a polyol monomer. The coated proppant can have a dry crush strength of about 0.1 wt % to about 5 wt % at a pressure of about 96.5 MPa, based on the Proppant Crush Resistance Test Procedure under ISO 13503-2:2011.
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