Peelable surface coating system over multi-section substrate

A peelable surface coating system comprising:

• (A) a multi-section substrate with joints between sections;
• (B) a multilayer peelable surface coating comprising:
• (1) a plurality of strength and flexibility layers comprising at least one strength and flexibility layer polymer selected from the group consisting of polyurethane, polybutadiene, polyisoprene, ethylene/propylene/diene terpolymer, polysiloxane, polyester, polyamide, polyurea, and polyether, the strength and flexibility layer polymer having a Tg of less than 0° C., each of the strength and flexibility layers having an average thickness of less than 0.6 mil, with the plurality of strength and flexibility layers having an average combined total post-peel thickness of from 3.3 mils to 6 mils, and;
• (2) a wear layer comprising at least one wear layer polymer selected from the group consisting of polyurethane, acrylic polymer, polysiloxane, polysilazane, polyester, polyamide, polyurea, and epoxy polymer, the wear layer polymer exhibiting a Tg of at least 20° C., the wear layer having an average post-peel thickness of from 0.2 mil to 3 mils;
• and
• wherein the peelable surface coating system spans the joints between the sections and is peelable from both the substrate and the joints between the substrate sections, the strength and flexibility layers being between the wear layer and the substrate, with the peelable surface coating having a post-peel average percent elongation (E) of at least 350%, a post-peel average break force maximum load (BF) of at least 3000 gm-Force, and a post-peel average total thickness (T) of from 3.5 to 10 mils, and wherein:
• (E %)×(BF gm-Force)×(T mils)≥4×106.

A process for preparing a multi-layer peelable surface coating system, comprising:

• (I) depositing a waterborne strength and flexibility layer coating composition to (i) a multi-section substrate and (ii) joints between sections, the waterborne strength and flexibility layer coating composition comprising water and at least one member selected from the group consisting of polyurethane, polybutadiene, polyisoprene, ethylene/propylene/diene terpolymer, polysiloxane, polyester, polyamide, polyurea, and polyether, wherein the strength and flexibility layer coating composition is applied in a manner such that upon drying a resulting first strength and flexibility layer has an average thickness of less than 0.6 mils, the strength and flexibility layer coating composition being selected such that upon drying, the resulting first strength and flexibility layer exhibits an average Konig value of less than 40 seconds;
• (II) allowing the strength and flexibility layer coating composition to dry to form the first strength and flexibility layer;
• (III) repeating steps (I) and (II) at least four additional times, to form, respectively, a second strength and flexibility layer, a third strength and flexibility layer, a fourth strength and flexibility layer, and a fifth strength and flexibility layer, each of which has an average thickness of less than 0.6 mils, with the first, second, third, fourth, and fifth strength and flexibility layers together exhibiting an average combined total post-peel thickness of from 3.3 mils to 6 mils;
• (IV) depositing a wear layer coating composition over the fifth strength and flexibility layer, the wear layer coating composition comprising at least one member selected from the group consisting of polyurethane, acrylic polymer, polysiloxane, polysilazane, polyester, polyamide, polyurea, and epoxy polymer, the wear layer coating composition being selected such that upon curing, the resulting wear layer exhibits a Konig hardness value of at least 60 seconds;
• and
• (V) allowing the wear layer coating composition to dry and/or cure to form the wear layer having a post-peel average thickness of from 0.2 mil to 3 mils, and to form the peelable surface coating system;
• wherein the strength and flexibility layer coating composition and the wear layer coating composition are applied to the multi-section substrate in a manner such that the peelable surface coating spans the joints between the substrate sections and is peelable from the substrate as well as from the joints between the substrate sections, with the peelable surface coating having a post-peel average percent elongation (E) of at least 350%, a post-peel average break force maximum load (BF) of at least 3000 gm-Force, and a post-peel average total thickness (T) of from 3.5 to 10 mils, and wherein:
• (E %)×(BF gm-Force)×(T mils)≥4×106.

A process for providing a multi-section substrate surface with a coating, and maintaining the multi-section substrate surface, comprising:

• (I) providing a stripped multi-section substrate surface having joints between the sections of the substrate surface;
• (II) depositing a waterborne strength and flexibility layer coating composition to (i) the surface of multi-section substrate and (ii) the joints between sections, the strength and flexibility layer coating composition comprising at least one member selected from the group consisting of polyurethane, polybutadiene, polyisoprene, ethylene/propylene/diene terpolymer, polysiloxane, polyester, polyamide, polyurea, and polyether, wherein the strength and flexibility layer coating composition is applied in a manner such that upon drying a resulting first strength and flexibility layer has an average thickness of less than 0.6 mils, the strength and flexibility layer coating composition being selected such that upon drying, the resulting first strength and flexibility layer exhibits an average Konig value of less than 40 seconds;
• (III) allowing the strength and flexibility layer coating composition to dry to form the first strength and flexibility layer;
• (IV) repeating steps (II) and (III) at least four additional times, to form, respectively, a second strength and flexibility layer, a third strength and flexibility layer, a fourth strength and flexibility layer, and a fifth strength and flexibility layer, each of which has an average thickness of less than 0.6 mils, with the first, second, third, fourth, and fifth strength and flexibility layers together exhibiting a post-peel average total thickness of from 3.3 mils to 6 mils;
• (V) depositing a wear layer coating composition over the fifth strength and flexibility layer, the wear layer coating composition comprising at least one member selected from the group consisting of polyurethane, acrylic polymer,
• polysiloxane, polysilazane, polyester, polyamide, polyurea, and epoxy polymer, the wear layer coating composition being selected such that upon drying, the resulting wear layer exhibits a Konig hardness value of at least 60 seconds, and so that the wear layer has a post-peel average thickness of from 0.2 to 0.3 mils;
• and
• (VI) allowing the wear layer coating composition to dry and/or cure to form the wear layer and the peelable surface coating system;
• (VII) allowing the peelable surface coating system to be subjected to use;
• (VIII) peeling the peelable coating system from the multi-section substrate and from the joints between the sections of the multi-section substrate;
• and
• (IX) repeating steps (II) through (VI);
• and
• wherein the strength and flexibility layer coating composition and the wear layer coating composition are applied to the multi-section substrate in a manner such that the peelable surface coating spans the joints between the sections and is peelable from the surface of the substrate as well as from the joints between the sections, with the peelable surface coating having a post-peel average percent elongation (E) of at least 350%, a post-peel average break force maximum load (BF) of at least 3000 gm-Force, and an average post-peel average total thickness (T) of from 3.5 to 10 mils, and wherein:
• (E %)×(BF gm-Force)×(T mils)≥4×106.