Back to results
US 12,503,546 B2Granted
Curable polyurethane prepolymer composition
AssigneeUrethane Systems USA LLC
InventorsThomas Peter, Ian Laskowitz, Margarita Ortiz, George Brereton
Life of this patent
Estimating the term…
Abstract
The present invention relates generally to a curable polyurethane prepolymer composition comprising polyurethane prepolymer obtained by the reaction of toluene diisocyanate (TDI) and at least one polyol and an ortho alkyl disubstituted dianiline, preferably 4,4′-methylene-bis-(3-chloro-2,6-diethylaniline) (MCDEA), wherein 50 to 100 wt % of the at least one polyol is at least one polycarbonate polyol.
Claims20
A curable polyurethane prepolymer composition, comprising:
- a polyurethane prepolymer obtained by reacting components comprising a toluene diisocyanate and a polyol;
- and
- an ortho alkyl disubstituted dianiline of formula (I)
- RI independently being a linear C1-C6 alkyl, branched C1-C6 alkyl, R2 being hydrogen or halogen, and A being —O—, —CH2—, —C(CH3)2, —SO2—, or —CO2(CH2)nO2C—, with n being 1, 2, 3, 4, 5 or 6.
- wherein the polyol comprises a polycarbonate polyol in a range of from 50 to 100 w wt. %, based on total polyol weight, and
- wherein the polyurethane prepolymer comprises less than 0.1 wt. % of free TDI monomer, based on a total weight of the polyurethane prepolymer.
3 more elements
A curable polyurethane prepolymer composition, comprising:
- a polyurethane prepolymer comprising, in polymerized form, a toluene diisocyanate and a polyol;
- and
- an ortho alkyl disubstituted dianiline of formula (I)
- R1 independently being a linear C1-C6 alkyl, branched C1-C6 alkyl, R2 being hydrogen or halogen, and A being —O—, —CH2—, —C(CH3)2—, —SO2—, or —CO2(CH2)nO2C—, with n being 1, 2, 3, 4, 5 or 6,
- wherein the polyol comprises polycarbonate polyol in a range of from 50 to 100 wt. %, based on total polyol weight,
- wherein the polyurethane prepolymer comprises less than 0.1 wt. % of free TDI monomer, based on total polyurethane prepolymer weight, and
- wherein the polycarbonate polyol comprises poly (hexamethylene carbonate) diol.
4 more elements
Dependencies are inferred from the claim text.