Adhesion promotion additives and methods for improving coating compositions
View Patent ↗An additive (and methods for a coating composition that includes at least one an agent for improving the performance of the coating composition, selected from a Michael addition product of siloxane further containing one or more active hydrogen containing functional moieties with two or more acrylate groups; a high molecular weight adduct having multiple alkoxysilane moieties; a compound including at least one terminal unsaturation and multiple alkoxysilyl groups; an organometallic compound that includes an element selected from silicon, titanium, zirconium, aluminum, or any combination thereof.
1. A coating composition, comprising:
a. a resin selected from an epoxy, an acrylic, a polyurethane, or any combination thereof in the form of a resin dispersed in one or more unreactive solvents;
b. a colorant;
c. an additive comprising a Michael addition product of an amino alkoxy silane and a compound having two or more acrylate groups the Michael addition product having 4 or greater alkoxy silane groups, at least one unsaturated group and all of the amine groups are tertiary; and
a unsaturated carboxylic acid, a unsaturated sulfonic acid, a unsaturated phosphonic acid, or any combination thereof,
wherein the Michael Addition product to acid weight ratio is about 1:1 to about 10:1.
2. A coating composition according to claim 1 wherein the Michael addition product contains 6 or greater alkoxy silane groups.
3. A coating composition according to claim 1 wherein the Michael Addition product to acid weight ratio is about 2:1 to about 5:1.
4. The coating composition of claim 1 wherein the composition is cured by a free radical reaction, and the Michael addition product is a reaction product of (i) bis[3-(trimethoxysilyl)-propyl]amine, bis[3-(triethoxysilyl)-propyl]amine or a mixture thereof; and (ii) a polyacrylate monomer.
5. The coating composition of claim 4 , wherein the pdyacryate monomer is a propoxylated neopentyl glycol diacrylate monomer.
6. The coating composition of claim 5 , wherein the composition includes a photoinitiator, a filler, or both.
7. The coating composition of claim 6 , wherein the carboxylic acid is an acrylic acid, a methacrylic acid.
8. The coating composition of claim 7 , wherein the composition is a printing ink, is employed as a one component composition, or both.
9. A kit for preparing a coating composition, comprising:
a first part comprising a base composition; and
a second part comprising an adhesion promotion additive comprising a Michael addition product of an amino alkoxy silane and a compound having two or more acrylate groups the Michael addition product having 4 or greater alkoxy silane groups, at least one unsaturated group and all of the amine groups are tertiary and a compound including an acid moiety and unsaturation, wherein the Michael Addition product to the compound including an acid moiety weight ratio is about 1:1 to about 10:1;
wherein the second part is packaged separately from the first part for mixing h parts together at a remote location.
10. The kit of claim 9 wherein the acid moiety is f carboxylic acid, a sulfonic acid, a phosphoric acid, or any combination thereof.
11. A kit according to claim 9 wherein the addition product contains 6 or greater alkoxy silane groups.
12. kit according to claim 9 wherein the base composition comprises a resin selected from an epoxy, an acrylic, a polyurethane, or any combination thereof in the form of a resin dispersed in one or more organic solvents.
13. A kit according to claim 9 wherein the Michael Addition product to the compound including an acid moiety weight ratio is about 2:1 to about 5:1.