Rapid curing polyurethane composition useful as a coating or...

Details Rapid curing polyurethane composition useful as a coating or... Rapid curing polyurethane composition useful as a coating or...

C - Chemistry, Metallurgy

08

G

C08G 18/20 (2006.01)

Patent

CA 2125225

RAPID CURING POLYURETHANE COMPOSITION USEFUL AS A COATING OR SEALANT ABSTRACT OF THE DISCLOSURE A storage-stable, rapid curing one-component polyurethane composition useful as a sealant or coating is made with an isocyanate prepolymer having an isocyanate group content of from about 4 to about 6% and a molecular weight of from about 1400 to about 2100, an oxazolidine and optionally a catalyst. The prepolymer used is the reaction product of toluene diisocyanate, a polytetramethylene ether glycol having a molecular weight of from about 500 to about 1500 and a diol having a molecular weight of from about 50 to about 200. This composition is useful as a coating or sealant for porous substrates, particularly wood-based products such as wood composites and flake board.

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