Conformable coating and composition
View Patent ↗The disclosed conformable coating provides a highly durable and resilient film useful for protecting and repairing surfaces such as skin and mucous membranes. The coating comprises 0.1% to 65% wt. of a polymerized cyanoacrylate monomer and at least 35% wt. of an elastomer phase. The conformable coating composition comprises a polymerizable cyanoacrylate monomer, an elastomer, and a volatile liquid. The cyanoacrylate monomer is 0.1 to 65% wt. of the nonvolatile portion, the elastomer in an elastomer phase is at least 35% wt. of the nonvolatile portion, and the volatile liquid is at least 40% wt. of the total composition.
1. A conformable coating composition comprising:
a polymerizable cyanoacrylate monomer;
an elastomer;
a volatile liquid;
wherein the cyanoacrylate monomer is 0.1 to 65% wt. of the nonvolatile portion;
wherein the elastomer in an elastomer phase is at least 35% wt. of the nonvolatile portion;
wherein the volatile liquid is at least 40% wt. of the total composition; and
wherein the composition does not create an adhesive bond which exceeds 45 grams shear force over a 6.5 cm 2 area after 10 min. contact time to a second glass surface, when: (i) the composition is applied to a first glass surface, and (ii) the second glass surface is applied to the first glass surface, having the composition disposed there between, wherein the composition forms an adherent, conformable polymer coating when applied to a surface.
2. The composition of claim 1 , wherein said polymerizable cyanoacrylate monomer component comprises alpha-cyanoacrylates.
3. The composition of claim 1 , comprising 0.1 to 55% wt. of the non volatile portion of the polymerizable cyanoacrylate monomer.
4. The composition of claim 1 , wherein the volatile liquid is selected from the group consisting of volatile linear and cyclic siloxanes, volatile polydimethylsiloxanes; C6 to C10 alkanes and their structural isomers; volatile aprotic solvents; volatile ketones; volatile ethers, and combinations thereof.
5. The composition of claim 1 , wherein the volatile liquid is selected from the group consisting of heptane, isooctane, octane, nonane, and decane, cyclohexane, methylcyclohexane, methyl acetate, ethyl acetate, propylene glycol diacetate, acetone, methyl ethyl ketone, diethyl ether, ethyl propyl ether, dipropyl ether, dipropylene glycol dimethyl ether, and combinations thereof.
6. The composition of claim 1 , comprising at least 60% wt. of the total composition of the volatile liquid.
7. The composition of claim 1 , wherein the elastomer is a rubber or a thermoplastic elastomer.
8. The composition of claim 7 , wherein the rubber is selected from the group consisting polyisobutylenes, polyisoprenes, butyl rubber, halogenated butyl rubbers, dienes, styrene copolymers, acrylonitrile copolymers, and copolymers or mixtures thereof, which are soluble or highly swollen in the volatile liquid.
9. The composition of claim 1 , wherein the elastomer is chemically modified with a low surface energy material.
10. The composition of claim 9 , wherein the low surface energy material is silicone, fluorinated oligomers, or hydrocarbon based oligomeric material.
11. The composition of claim 1 , wherein the viscosity is less than 1,000 cps.
12. The composition of claim 1 , wherein the volatile liquid evaporates from a surface to form a conformable film in less than 2 minutes.
13. The composition of claim 12 , wherein the film fractures less than 75% at 100% elongation.
14. The composition of claim 9 , wherein the elastomer is an unsaturated rubber.