System, method and composition for adhering preformed thermoplastic traffic control signage to pavement
View Patent ↗The present disclosure relates to a system and permanent pavement marker for coating or bonding or both coating and bonding a first underlying substrate, wherein a second layer comprises a polyurea epoxy curable composition of about 200 centipoise which is bonded to the first underlying substrate, wherein the curable composition second layer is further bonded to a third layer, wherein the third layer comprises an epoxy bonder paste in a range of 10,000 to 300,000 centipoise, and the third layer is further bonded to a fourth layer, wherein the fourth layer is a preformed thermoplastic marking tile that is applied over the third layer of epoxy bonder paste, thereby forming a the permanent pavement marking. The system and pavement marker may also include a thermoplastic adhesive applied between the epoxy bonder paste and the preformed thermoplastic marking tile such that the bonder paste acts as a water vapor barrier reducing the rate of water vapor transmission into the marking tile.
1. A system for coating a substrate and bonding a marking tile to said substrate, wherein a polyurea epoxy curable primer composition of about 200 centipoise comprises a sealing layer that is bonded directly to said substrate and, wherein said sealing layer bonds with an additional bonding layer comprising an epoxy bonder paste in a range of 10,000 to 300,000 centipoise, said wherein said sealing layer and said additional bonding layer provide a combined adhesive layer coating and covering of said substrate, wherein said substrate and said combined adhesive layer coating and covering provides for further bonding to a preformed thermoplastic marking tile that is applied over said additional bonding layer, thereby forming a single, semi-homogeneous, permanent pavement marking.
2. A system according to claim 1 , wherein a thermoplastic adhesive is applied between adhesive coating and covering layer and said preformed thermoplastic marking tile and wherein adhesive coating and covering layer is acts as a water vapor barrier reducing the rate of water vapor transmission into said marking tile and wherein said water vapor barrier ensures adhesive longevity of said thermoplastic marking tile with said substrate.
3. A system according to claim 1 , wherein said substrate comprises concrete that is uncured, partially cured or fully cured.
4. A system according to claim 1 , wherein said substrate is concrete that has been previously shaped and formed within about 24 hours to about 2 weeks.
5. A system according to claim 4 , wherein said concrete provides a moist, damp, or partially wet surface.
6. A system according to claim 1 , wherein said substrate requires no laitance removal.
7. A system according to claim 1 , wherein said thermoplastic marking tile is rolled, squeegeed, or formed, to substantially conform to a combined adhesive layer coating and covering said substrate.
8. A system according to claim 2 , wherein said first substrate, adhesive coating and covering layer and said preformed thermoplastic marking tile chemically and/or physically react to form bonds with each other and with said substrate with or without the use of said thermoplastic adhesive.
9. A system according to claim 1 , wherein said substrate is a traffic surface for pedestrians, motorized vehicles, aircraft, human powered conveyances, programmable robotics, men and/or machines.
10. A system according to claim 9 , wherein said polyurea epoxy curable primer comprises a one part or multiple part composition or mixture and said mixture is a isocyanate-functional prepolymer, including terpene-phenolic resin, and a silane compound.
11. A system according to claim 10 , wherein said polyurea epoxy curable primer comprises a one or two part epoxy, multi-component polyurethane, silicone adhesive, UV/EB curable adhesive, UV/EB curable resins, and/or combinations thereof.
12. A system according to claim 11 , wherein said polyurea epoxy curable primer comprises a viscosity of about 10 centipoise to about 500 centipoise.
13. A system according to claim 10 , wherein said polyurea epoxy curable primer remains uncured from about 1 minute to about 60 minutes.
14. A system according to claim 1 , wherein said preformed thermoplastic marking tile comprises hydrocarbon based polymers.
15. A system according to claim 14 , wherein said hydrocarbon based polymers are comprised of binders, resins, pigments, fillers and optionally reflective components.
16. A system according to claim 15 , wherein said resins are comprised of maelic modified resin ester, C5 hydrocarbon, plasticizer, vegetable oils, phthalate esters, mineral oil, castor oil, wax/flexibilizer, paraffin wax, polyamide, EVA and/or SBS elastomers.
17. A system according to claim 15 , wherein said pigments are comprised of titanium dioxide, lead chromate, and/or organic dyes.
18. A system according to claim 15 , wherein said fillers are comprised of calcium carbonates.
19. A system according to claim 15 , wherein said thermoplastic marking tile comprises alkyd polymers that are filled with of binders, resins, pigments, fillers and optionally reflective components.
20. A system according to claim 19 , wherein said resins are comprised of maelic modified resin ester, rosin ester, plasticizer, vegetable oils, phthalate esters, mineral oil, castor oil, wax/flexibilizer, paraffin wax, polyamide, EVA and/or SBS elastomers.
21. A system according to claim 19 , wherein said pigments are comprised of titanium dioxide, lead chromate and/or organic pigments.
22. A system according to claim 19 , wherein said fillers are comprised of calcium carbonates.
23. A system according to claim 19 , wherein said optional reflective components are comprised of glass beads.
24. A system according to claim 19 , wherein said thermoplastic marking tile comprises detectable warning devices, pavement markings, and traffic control markings.
25. A system according to claim 19 , wherein said thermoplastic marking tile is of a sheet, roll, flat, raised, strip or stripe form.
26. A system according to claim 7 , wherein said thermoplastic marking tile conforms to AASHTO Designation M249-98 specifications.