Two layer protective coatings
First Claim
1. A two layer protective coating for protecting a substrate comprising:
- a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a polyol and an aliphatic polyisocyanate;
said topcoat being clear;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for protecting surfaces and facilitating the removal of unwanted substances therefrom is disclosed, the system including a polymeric coating having a low volatile organics content (VOC) which is safe for the environment, and a cleaner for application to the coating to remove material from the coating, such as graffiti. The coating may be either a water-based epoxy comprising a bisphenol A resin and polyamide resin, or an aliphatic urethane comprising a polymer having reactive sites which react with a isocyanate and an aliphatic isocyanate. The cleaner is suitable for removing all manner of epoxy and urethane based spray paints, indelible inks, industrial chemicals, and the like. The cleaner comprises N-methyl pyrrolidone in a concentration of fifty percent by weight or greater and a surfactant.
-
Citations
41 Claims
-
1. A two layer protective coating for protecting a substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a polyol and an aliphatic polyisocyanate;
said topcoat being clear;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
-
12. A coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a polyol and an aliphatic polyisocyanate;
said polyol being selected from the group consisting of saturated polyester polyols, acrylic polyols, polyether polyols, ethylene glycol and propylene glycol;
said topcoat being clear;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
-
-
22. A two layer coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a saturated polyester polyol having an equivalent weight ranging from about 150 to about 1300 with an aliphatic polyisocyanate;
said topcoat being clear;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
-
-
31. A two layer coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a saturated polyester polyol having a weight average molecular weight ranging from about 3500 to about 4300 with an aliphatic polyisocyanate;
said topcoat being clear;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
-
-
39. A two layer coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a polyol, a flatting agent, and an aliphatic polyisocyanate;
said polyol being selected from the group consisting of saturated polyester polyols, acrylic polyols, polyether polyols, ethylene glycol and propylene glycol;
said topcoat being clear and having a finish that is at least primarily flat;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat;
said topcoat being characterized by the ability to resist penetration by unwanted substances and by the ability to withstand removal of unwanted substances by a solvent without being degraded.
-
-
40. A two layer coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a saturated polyester polyol having an equivalent weight ranging from about 150 to about 1300, a flatting agent, and an aliphatic polyisocyanate;
said topcoat being clear and having a finish that is flat;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat;
said topcoat being characterized by the ability to resist penetration by unwanted substances and by the ability to withstand removal of unwanted substances by a solvent without being degraded.
-
-
41. A two layer coated substrate comprising:
-
a primer layer formed on the substrate from a water-based primer composition obtained by mixing an acrylic copolymer and water;
said primer layer being clear; and
a saturated, aliphatic urethane protective topcoat formed on the primer layer by application of a topcoat composition obtained by mixing a saturated polyester polyol having a weight average molecular weight ranging from about 3500 to about 4300, a flatting agent, and an aliphatic polyisocyanate;
said topcoat being clear and having a finish that is flat;
said primer layer being characterized by the ability to prevent the topcoat from causing the substrate to appear darkened after the topcoat has hardened on the primer layer compared to the appearance of the substrate before application of the primer layer and the topcoat;
said topcoat being characterized by the ability to resist penetration by unwanted substances and by the ability to withstand removal of unwanted substances by a solvent without being degraded.
-
Specification