Provided are compositions and methods that are useful for hair care compositions. The compositions comprise polyurethane microparticles coated with zinc salt particles, wherein the ratio of zinc salt to polyurethane is in a range of from 1:99 to 3:7, and the polyurethane microparticles have an average particle size of less than 100 microns. Also provided are methods of preparation of such compositions.

The present invention relates to a composite particle comprising: at least one hydrophilic core particle; and a plurality of hydrophobic particles, wherein the surface of the hydrophilic core particle is substantially discontinuously covered by the hydrophobic particles. The novel composite particle according to the present invention can have surface active properties sufficient to prepare stable Pickering emulsions, and can maintain the surface active properties over a long period of time. The present invention also relates to a method for preparing the above composite particle.

The present invention provides resin beads that are capable of realizing a water repellent and oil repellent effect, and further, that are also capable of providing cosmetic materials excellent in persistence of makeup when added and used in cosmetic materials etc. because the resin beads themselves contain silicone in a fixed state, and the present invention also provides a process for producing the resin beads. Resin beads being resin particles (a copolymer) obtained by subjecting a monomer mixture containing a plurality of monomers each having a copolymerizable functional group to suspension polymerization in a state where at least a non-polymerizable silicone is present, the resin particles containing the silicon in a fixed state, and a process for producing the resin beads.

A method for producing functionalized nanocrystalline cellulose, the method comprising the steps of providing cellulose, mixing said cellulose with a peroxide, thereby producing a reaction mixture, and heating the reaction mixture, and/or exposing the reaction mixture to UV radiation is provided. Functionalized nanocrystalline cellulose produced by this method is also provided.

This invention provides particles encapsulating active agent that do not produce functional effects or remove functional effects until they are triggered by contacting with at least one exogenous source. The particles in this invention minimize toxic effects to the body of the active agent and the material that interacts with an exogenous source as well as minimize body chemicals from degrading both the active agent and the material that interacts with an exogenous source inside the particle.

An external preparation containing the following component (A) and component (B). Component (A): ionic polymer particles containing structural units derived from (a) one or more hydrophobic monomers selected from the group consisting of styrene and a derivative thereof, a vinyl ester, and a hydrophobic acrylic monomer, and (b) an ionic hydrophilic monomer or a salt thereof, wherein the ratio by mass of (a) to (b), (a)/(b) is 99.5/0.5 to 80/20, and the ionic polymer particles have a glass transition temperature of higher than 5° C. and 120° C. or lower. Component (B): one or more compounds selected from the group consisting of a phenoxyethanol (B1), a 2-ethylhexyl paramethoxycinnamate (B2), a benzyl alcohol (B3), a sorbitol (B4), a specific oxyalkylene derivative (B5), a polyoxyalkylene alkyl glucoside (BG), an oleic acid (B7), an alkyl benzoate (B8), a xylitol (B9), a 2-ethylhexyl (RS)-2-cyano-3,3-diphenylprop-2-enoate (B10), and a methylphenylpolysiloxane (B11).

Alkali-swellable rheology modifier comprising a core-shell polymer comprising a core polymer and a shell comprising at least one shell copolymer layer at least partially cross-linked and containing a mole percent of crosslinking agent greater than the mole percent of crosslinking agent in the core polymer, provided if the mole percent of crosslinking agent in the core polymer is zero, then either the core polymer is greater than 60 wt % of the core-shell polymer; the core polymer comprises at least one associative monomer; at least one shell copolymer layer copolymer comprises at least one associative monomer; and/or the at least one shell copolymer layer that is at least partially cross-linked comprises greater than 3 mole % crosslinking agent. Aqueous compositions comprising the alkali-swellable rheology modifier include personal care formulations, healthcare formulations, agricultural formulations, paint formulations, coating formulations, laundry and fabric care formulations, household cleaning formulations, and industrial and institutional cleaning formulations.

A nanoparticle comprising a keratin polypeptide and at least one lipophilic active ingredient, wherein the at least one lipophilic active ingredient is non-covalently bound to the keratin polypeptide and can be e.g. a therapeutic or diagnostic agent, a nutraceutical, a cosmetic ingredients, a dye or a cosmeceutical, the keratin polypeptide being water-soluble; optionally, the nanoparticle further comprises at least one hydrophilic active ingredient non-covalently bound to the keratin polypeptide, which can be e.g. a therapeutic or diagnostic agent, a nutraceutical, a cosmetic ingredients, a dye or a cosmeceutical.

A gold nanoparticles conjugated with palmitoyl pentapeptide-4 (Palm-L-Lys-L-Thr-L-Thr-L-Lys-L-Ser-OH), compositions comprising them, use thereof in cosmetic treatments, as well as methods for obtaining said nanoparticles.

Disclosed are multi-staged acrylic emulsion polymers and their use as rheology modifiers in the formulation of liquid personal care cleansers for the skin and hair. More particularly, the present technology relates to liquid cleansing compositions that possess the necessary rheology properties to stably suspend particles and insoluble materials within the cleanser but may also be used with pump dispensers to generate and dispense a creamy foam without fouling the pump mechanism.