Materials for improved adhesion relating to functional cold end coatings (CECs) and methods of detecting same
View Patent ↗Various agents for improving adhesion of cold end coatings on glass surfaces are described Also described are agents for improving bonding between cold end coatings and organic inks. And, methods and related detection solutions for detecting the presence of cold end coatings on a substrate such as a glass bottle are disclosed. Additionally, particular additives and primers are described that can be applied onto cold end coatings for improving adhesion thereto.
1. A glass substrate coated with a cold end coating composition, the cold end coating composition including:
an additive for improving adhesion of an ink to the cold end coating composition, the additive being one or more organo metalate agents, and
at least one agent that indicates a presence of the cold end coating on the glass substrate after having been subject to degradation due to age, surface damage, or hot caustic attack, the at least one agent being selected from the group consisting of UV optical brighteners, UV active pigments, and combinations thereof.
2. The glass substrate of claim 1 , wherein the organo metalate agents are organo transition metalates which are selected from the group consisting of organo titanates, organo zirconates, and combinations thereof.
3. The glass substrate of claim 1 , wherein the additive further comprises at least one silane agent.
4. The glass substrate of claim 3 , wherein the at least one silane agent are selected from the group consisting of amino silanes, epoxy silanes, chlorosilanes, methoxy silanes, ethoxy silanes, alkoxy silanes, acyloxy silanes, dipodal silanes, and combinations thereof.
5. The glass substrate of claim 4 , wherein the at least one silane agent is an alkoxy silane selected from the group consisting of glycidoxypropyltrialkoxy silane, γ-aminopropyltrialkoxy silane, and combinations thereof.
6. The glass substrate of claim 3 , wherein a weight ratio of an amount of the at least one silane agent to an amount of the one or more organo metalate agents in the cold end coating composition is 2:1.
7. The glass substrate of claim 6 , wherein the at least one silane agent is included in the cold end coating composition at a concentration of 0.2 wt %.
8. The glass substrate of claim 1 , wherein the agent includes UV optical brighteners selected from the group consisting of stilbenes, coumarines, azolines, and combinations thereof.
9. The glass substrate of claim 1 , wherein the composition includes at least one forensic indicator for detecting the presence of a cold end coating.
10. The glass substrate of claim 9 , wherein the at least one forensic indicator is selected from the group consisting of ninhydrin, ninhydrin derivatives, potassium permanganate, 1,8-diazafluorene-9-one, 1,2-indanediones, and combinations thereof.
11. The glass substrate of claim 10 , wherein the at least one forensic indicator is ninhydrin or a ninhydrin derivative.
12. The glass substrate of claim 1 , wherein the cold end coating composition further includes an aqueous solution of ethoxylated stearic acid glycol ester.
13. The glass substrate of claim 12 , wherein the aqueous solution has a concentration of 0.2 wt % of ethoxylated stearic acid glycol ester.
14. The glass substrate of claim 1 , wherein the at least one agent is included in the cold end coating composition at a concentration of 0.01 wt %.
15. The glass substrate of claim 1 , further comprising an organic ink applied over the cold end coating composition.
16. A primer composition for improving adhesion of an ink to a cold end coating on a glass substrate, the primer composition comprising:
an additive including one or more silane agents, and one or more organo metalate agents, and
at least one agent that indicates a presence of a cold end coating on a glass substrate after having been subject to degradation due to age, surface damage, or hot caustic attack, the at least one agent being selected from the group consisting of UV optical brighteners, UV active pigments, and combinations thereof.