Abstract: The present disclosure relates to a curable nail strengthening composition comprising a polymerizable material, at least one penetrating agent, and at least one curing agent. The strengthening composition penetrates the nail and is cured within the nail plate without cross-linking the nail proteins. Methods for strengthening and repairing nails are also disclosed.

Abstract: The present disclosure relates to a curable nail strengthening composition comprising a polymerizable material, at least one penetrating agent, and at least one curing agent. The strengthening composition penetrates the nail and is cured within the nail plate without cross-linking the nail proteins. Methods for strengthening and repairing nails are also disclosed.

Abstract: The present disclosure relates to a curable nail strengthening composition comprising a polymerizable material, at least one penetrating agent, and at least one curing agent. The strengthening composition penetrates the nail and is cured within the nail plate without cross-linking the nail proteins. Methods for strengthening and repairing nails are also disclosed.

Abstract: Monophasic energy-curable solvent-free compositions useful for providing decorative nail enhancement are formulated using at least one energy-curable resin and at least one film-former such as a polyester or siloxane. Good adhesion to the nail surface is achieved without the use of a base coat and a top coat is not needed in order to attain an outer surface having acceptable esthetic appearance. The cured composition exhibits good durability and yet can be readily and cleanly removed when desired by soaking briefly in acetone.

Abstract: An artificial nail composition containing multicarbonyl-vinyl containing monomer, polymerization initiator, and optical brightener. The invention also relates to the process of making the nail composition.

Abstract: In the disclosed method for the reshaping (adornment, repair, covering, prosthetic extension, etc.) of essentially rigid, keratinaceous surfaces such as nail plates with a free radical-polymerizable acrylic ester, the free radical initiator comprises a compound of the formula III ##STR1## wherein R.sup.1 through R.sup.4 are hydrogen, an aliphatic group, an aromatic group, a cycloaliphatic group, or, less preferably, a sulfhydryl group, an alkali or alkaline earth metal salt of a sulfhydryl group, a halogen, or amino group; or R.sup.3 or R.sup.4 can be an alkali metal or alkaline earth metal cation when the 5-carbon is negatively charged. The compound of formula III, in chemically-curable systems is utilized in combination with a metal salt cocatalyst and, optionally, an organic buffering compound and a crosslinker.

Abstract: A method for improving--with an adhesion-promoting composition--adhesion of a synthetic monomeric or polymeric material (such as a curable acrylic monomer/polymerized acrylic system) to a keratinaceous substrate, as in, for example, the reshaping of fingernails or toenails. The adhesion-promoting composition comprises (A) an organic, dipolar, aprotic liquid carrier and, uniformly distributed throughout said liquid carrier, (B) pyromellitic dianhydride glycerol dimethacrylate adduct ("PMGDM"). The PMGDM isomer mixture which typically results when pyromellitic dianhydride is reacted with glycerol dimethacrylate is preferred, particularly in view of its high solubility in solvents of relatively low toxicity (e.g. lower aliphatic ketones). The adhesion-promoting composition can, if desired, be included in a nail-reshaping kit containing the materials and implements needed to reshape the nail plate.

Abstract: The disclosed method for making hollow shells (e.g. housing for in-ear hearing aids) employs a radiation-curable polymer comprising (a) a major amount of urethane methacrylate monomer (molecular weight 360-950) having a viscosity less than about 15,000 cps at 25.degree. C., (b) a viscosity-adjusting minor amount of unreacted hydroxyalkyl-methacrylate monomer, (c) a photoinitiating amount of a photoinitiator of the formula Ar.sup.1 --CO--C(OR).sub.2 --R', where Ar.sup.1 is aryl (e.g. phenyl), R is C.sub.1 -C.sub.4 -alkyl (e.g. methyl), and R' is hydrogen or alkyl or, preferably, aryl, and, optionally, (d) a coloring agent, e.g. a pigment concentrate. Viscosity control is of major importance; so the curable composition is generally solvent-free and free of viscosity-modifying solids (other than coloring agents). Acrylates (as distinct from methacrylates) are also omitted. The fully-formulated, curable composition is easily pourable and has a viscosity of less than about 2,000 cps.