E.i. Dupont De Nemours and Company

E. I. Du Pont Nemours and Co.

Xueying Huang

Hong Peng Wang

Ying Wu

John P O'Brien

Robert K Kobos

Gann Xu

Ming Zheng

Gary Ken Whiting

Janine Buseman-Williams

Zheng Ming

Hong Wang

Peptides have been identified that bind to tooth enamel. Compositions and methods comprising peptide-based oral care reagents having at least one tooth enamel-binding peptide and an oral care benefit agent are provided to adhere the benefit agent to the oral surface.

Peptide-based oral care surface reagents for personal care

Peptides have been identified that bind to oral surfaces such as teeth and gums. Peptide based oral care reagents have been created by couple such peptides to oral care benefit agents such as whiteners.

Peptides have been identified that bind with high affinity to hair, skin, and nails. Peptide-based hair conditioners, hair colorants, skin conditioners, skin colorants, and nail colorants are described. The peptide-based hair conditioners and hair colorants consist of a hair-binding peptide coupled to a hair conditioning agent or a coloring agent, respectively. The peptide-based skin conditioners and skin colorants consist of a skin-binding peptide coupled to a skin conditioning agent or a colorant, respectively. The peptide-based nail colorants consist of a nail-binding peptide coupled to a coloring agent. In all these compositions, the peptide may be directly coupled to the active agent or the coupling may be via a spacer. Personal care compositions containing these peptide-based conditioners and colorants are also described.

Peptide-based conditioners and colorants for hair, skin, and nails

A rapid method for the separation of nanoparticles having as few as one ligand attached thereto has been developed. The method relies on the size exclusion separation of a population of nanoparticle-ligand complexes having a narrow uniform size distribution. Ligands are typically biopolymers, functionalized to bind to other nanoparticles for the construction of geometric nanostructures.

Nanoparticle complexes having a defined number of ligands

Peptide-based carbon nanotube hair colorants are described. The hair colorants are prepared by coupling hair-binding peptides to the surface of chemically functionalized carbon nanotubes. Hair colorant and cosmetic compositions comprising the peptide-based carbon nanotube colorants are also described.

Peptide-based carbon nanotube hair colorants and their use in hair colorant and cosmetic compositions

Metallic nanoparticles coated with a mixed monolayer with well defined thickness or length are prepared. The mixed monolayer comprises a capture coating component useful for the specific capture of materials and a shielding coating component for elimination of non-specific binding of materials to the capture component.

Ethylene glycol monolayer protected nanoparticles

The disclosure provides a sunscreen formulation comprising a peptide-based metal oxide sunscreen agent, such as titanium dioxide nanoparticles, and a fluid vehicle.

Long lasting waterproof sunscreen comprising metal oxide and peptide conditioner

The invention provides new hair colorant and cosmetic compositions comprising carbon nanotubes that have either been chemically functionalized or physically modified to increase their affinity for hair.

Hair coloring and cosmetic compositions comprising carbon nanotubes

This invention relates to a process that uses Surface Atom Transfer Radical Polymerization (SATRP) to grow thin polyethylene glycol alkyl acrylate (PEGAA) polymer film gradients on the moiety accepting surface of a substrate. This invention also relates to a method for producing thin PEGAA polymer film gradients having specific surface functionalities, a thickness ranging from about 0.5 nm to about 5000 nm, and a polymer chain density ranging from 0.1 to 100% surface coverage.

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Hockessin, DE, United States of America

Xueying Huang