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US 2010/0137487 A1Published application
Air activated organotin catalysts for polyurethane synthesis
AssigneeE. I. Du Pont de Nemours and Company
InventorsJerald Feldma, Stephan J. McLain
Life of this patent
Estimating the term…
Abstract
This invention relates to an organotin-based catalyst system for polyurethane synthesis that is useful in coatings applications. The catalyst has low activity in the absence of oxygen. When a coating mixture comprising the catalyst is sprayed and/or applied to a substrate as a thin film in air, the catalyst is activated. For solvent-based refinish systems comprising hydroxyl and isocyanate species at high solids levels, the catalyst system therefore provides extended viscosity stability, i.e., pot life.
Claims19
1-8. (canceled)
A system comprising two parts A and B, wherein
- said part A comprises an isocyanate species, and
- said part B comprises a polyol and a catalyst, wherein
- said catalyst is selected from the group consisting of R1aR2bR3cSn[CH(OH)R4]d and R1aR2bR3cSn[C(O)R4]d, and mixtures thereof, wherein,
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4.
6 more elements
A system consisting of two parts A and B, wherein
- said part A comprises an isocyanate species, and
- said part B comprises a polyol and a catalyst, wherein
- said catalyst comprises:
- (a) a first compound of the formula selected from the group consisting of
- R1aR2bR3cSn[CH(OH)R4]d, and R1aR2bR3cSn[C(O)R4]d, and mixtures thereof,
- wherein
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4;
- and
- (b) a second compound of the formula Re—Yn—Rf, wherein
- n=an integer between 2 and 8;
- Re and Rf are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, alkoxide, amide, or carboxylate group, or together represent a single bond which ensures the formation of a cyclic structure with n≧3;
- and the radicals Y independently represent a tin-containing chain unit with the structure represented in Formula (I);
- wherein Rg and Rh are independently hydrogen, optionally substituted hydrocarbyl, or optionally substituted aryl.
15 more elements
A system comprising two parts A and B, wherein
- said part A comprises a polyol species, and
- said part B comprises an isocyanate and a catalyst, wherein
- said catalyst is selected from the group consisting of R1aR2bR3cSn[CH(OH)R4]d and R1aR2bR3cSn[C(O)R4]d, and mixtures thereof, wherein
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4.
6 more elements
A system comprising two parts A and B, wherein
- said part A comprising a polyol species, and
- said part B comprising an isocyanate and a catalyst, wherein said catalyst comprises:
- (a) a first compound of the formula selected from the group consisting of
- R1aR2bR3cSn[CH(OH)R4]d, R1aR2bR3cSn[C(O)R4]d, and mixtures thereof,
- wherein
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4;
- and
- (b) a second compound of the formula Re—Yn—Rf, wherein
- n=an integer between 2 and 8;
- Re and Rf are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, alkoxide, amide, or carboxylate group, or together represent a single bond which ensures the formation of a cyclic structure with n≧3, and the radicals Y independently represent a tin-containing chain unit with the structure represented in Formula (I);
- wherein Rg and Rh are independently hydrogen, optionally substituted hydrocarbyl, or optionally substituted aryl.
13 more elements
15-23. (canceled)
A coating composition comprising a catalyst, wherein the catalyst is selected from the group consisting of
- R1aR2bR3cSn[CH(OH)R4]d and R1aR2bR3cSn[C(O)R4]d, and mixtures thereof wherein
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4.
4 more elements
A coating composition comprising a catalyst wherein the catalyst comprises:
- (a) a first compound of the formula selected from the group consisting of
- R1aR2bR3cSn[CH(OH)R4]d, and R1aR2bR3cSn[C(O)R4]d, and mixtures thereof, wherein
- R1, R2, and R3 are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, silyl, carboxylate, hydroxide, alkoxide, stannoxy or stannyl group;
- R4 represents an optionally substituted hydrocarbyl or optionally substituted aryl group;
- a, b, and c are independently 0, 1, 2, or 3;
- d is 1 or 2;
- and
- a+b+c+d=4;
- and
- (b) a second compound of the formula Re—Yn—Rf, wherein
- n=an integer between 2 and 8;
- Re and Rf are independently hydrogen, optionally substituted hydrocarbyl, optionally substituted aryl, halide, alkoxide, amide, or carboxylate group, or together represent a single bond which ensures the formation of a cyclic structure with n≧3;
- and
- the radicals Y independently represent a tin-containing chain unit with the structure represented in Formula (I);
- wherein Rg and Rh are independently hydrogen, optionally substituted hydrocarbyl, or optionally substituted aryl.
12 more elements
26-28. (canceled)
Dependencies are inferred from the claim text.