Low monomer content NCO prepolymers based on
AssigneeDegussa AG
InventorEmmanouil Spyrou
Life of this patent
Estimating the term…
Abstract
Low-monomer, NCO-containing prepolymers based on 1,4-diisocyanato-2,2,6-trimethylcyclohexane, a process for their preparation, and their use.
Claims14
An NCO-containing prepolymer obtained by reacting a diisocyanate component comprising 1,4-diisocyanato-2,2,6-trimethylcyclohexane and at least one at least difunctional polyol in an NCO/OH ratio of 2-1.5:1 in the presence of at least one catalyst at 20-100° C., wherein said prepolymer has a residual monomer content of less than 1.0% by weight.
A process for preparing an NCO-containing prepolymer comprising reacting 1,4-diisocyanato-2,2,6-trimethylcyclohexane and at least one at least difunctional polyol in an NCO/OH ratio of 2-1.5:1 in the presence of at least one catalyst at 20-100° C., wherein said prepolymer has a residual monomer content of less than 1.0% by weight.
A moisture-curing coating system comprising an NCO-containing prepolymer obtained by reacting a diisocyanate component comprising 1,4-diisocyanato-2,2,6-trimethylcyclohexane and at least one at least difunctional polyol in an NCO/OH ratio of 2-1.5:1 in the presence of at least one catalyst at 20-100° C., wherein said prepolymer has a residual monomer content of less than 1.0% by weight.
A method of coating comprising applying to a surface in need thereof, an NCO-containing prepolymer obtained by reacting a diisocyanate component comprising 1,4-diisocyanato-2,2,6-trimethylcyclohexane and at least one at least difunctional polyol in an NCO/OH ratio of 2-1.5:1 in the presence of at least one catalyst at 20-100° C., wherein said prepolymer has a residual monomer content of less than 1.0% by weight.
Dependencies are inferred from the claim text.