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US 5,852,133 AGranted
Curable compositions containing 1,3,5-triazine carbamates and epoxy compounds
AssigneeCytec Technology Corp.
InventorsRam Baboo Gupta, Kuang Jong Wu
Life of this patent
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Abstract
Curable compositions which include a 1,3,5-triazine carbamate crosslinker and a polyfunctional epoxy resin as well as their uses in coatings are disclosed. The compositions may additionally contain a co-crosslinker and/or a polyfunctional hydroxy group containing material. Reduction in the formaldehyde emission levels relative to aminoplast resin based coatings can be achieved without loss of the ultimate film properties.
Claims49
A curable composition, comprising:
- (1) a resin component comprising a polyfunctional epoxy compound containing, on average, at least two epoxy functionalities per molecule, such polyfunctional epoxy compound being a copolymer of an epoxy group containing unsaturated monomer with an unsaturated comonomer which does not contain epoxy groups;
- and
- (2) a crosslinker component comprising a 1,3,5-triazine carbamate of the following general formula, as well as oligomers thereof:
- ##STR6## wherein R is selected from the group consisting of --NHCOOR.sup.3, hydrogen, hydrocarbyl, hydrocarbyloxy, hydrocarbylthio, amido, sulfonamido, amino, hydrocarbylamino, dihydrocarbylamino and cyclic amino;
- and wherein each R.sup.1, R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrocarbyl and hydrocarbyloxyhydrocarbyl;
- wherein the resin component and the crosslinker component are present in an epoxy:carbamate equivalents ratio of from about 0.5:1 to about 2:1.
3 more elements
A coating composition, comprising:
- (1) a resin component comprising a polyfunctional epoxy compound containing, on average, at least two epoxy functionalities per molecule, such polyfunctional epoxy compound being a copolymer of an epoxy group containing unsaturated monomer with an unsaturated comonomer which does not contain epoxy groups;
- and
- (2) a crosslinker component comprising a 1,3,5-triazine carbamate of the following general formula, as well as oligomers thereof:
- ##STR7## wherein R is selected from the group consisting of --NHCOOR.sup.3, hydrogen, hydrocarbyl, hydrocarbyloxy, hydrocarbylthio, amido, sulfonamido, amino, hydrocarbylamino, dihydrocarbylamino and cyclic amino;
- and wherein each R.sup.1, R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrocarbyl and hydrocarbyloxyhydrocarbyl;
- wherein the resin component and the crosslinker component are present in an epoxy:carbamate equivalents ratio of from about 0.5:1 to about 2:1.
3 more elements
A method of coating a substrate, comprising the steps of:
- (A) applying to the substrate a curable composition, comprising:
- (1) a resin component comprising a polyfunctional epoxy compound containing, on average, at least two epoxy functionalities per molecule, such polyfunctional epoxy compound being a copolymer of an epoxy group containing unsaturated monomer with an unsaturated comonomer which does not contain epoxy groups;
- and
- (2) a crosslinker component comprising a 1,3,5-triazine carbamate of the following general formula, as well as oligomers thereof:
- ##STR8## wherein R is selected from the group consisting of --NHCOOR.sup.3, hydrogen, hydrocarbyl, hydrocarbyloxy, hydrocarbylthio, amido, sulfonamido, amino, hydrocarbylamino, dihydrocarbylamino and cyclic amino;
- and wherein each R.sup.1, R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrocarbyl and hydrocarbyloxyhydrocarbyl;
- then
- (B) curing the so applied curable composition to form a crosslinked film;
- wherein the resin component and the crosslinker component are present in an epoxy:carbamate equivalents ratio of from about 0.5:1 to about 2:1.
6 more elements
A substrate coated with a crosslinked film derived from a curable composition, comprising:
- (1) a resin component comprising a polyfunctional epoxy compound containing, on average, at least two epoxy functionalities per molecule, such polyfunctional epoxy compound being a copolymer of an epoxy group containing unsaturated monomer with an unsaturated comonomer which does not contain epoxy groups;
- and
- (2) a crosslinker component comprising a 1,3,5-triazine carbamate of the following general formula, as well as oligomers thereof:
- ##STR9## wherein R is selected from the group consisting of --NHCOOR.sup.3, hydrogen, hydrocarbyl, hydrocarbyloxy, hydrocarbylthio, amido, sulfonamido, amino, hydrocarbylamino, dihydrocarbylamino and cyclic amino;
- and wherein each R.sup.1, R.sup.2 and R.sup.3 is independently selected from the group consisting of hydrocarbyl and hydrocarbyloxyhydrocarbyl;
- wherein the resin component and the crosslinker component are present in an epoxy:carbamate equivalents ratio of from about 0.5:1 to about 2:1.
3 more elements
Dependencies are inferred from the claim text.