a The invention relates to a dentin collagen fibril demineralizing material, and a preparation method and application thereof. The invention relates to a conjugate of water-soluble chitosan and an aminocarboxylic acid metal chelating agent used for dental demineralization, preferably dentin demineralization. The invention also discloses a dentin collagen fibril demineralizing material and a preparation method and application thereof, wherein the material is prepared from 0.5-1 part by mass of water-soluble chitosan, 10-30 parts by mass of EDTA, and 0.8-1.5 parts by mass of cross-linking agent. The invention relates to a dental demineralization composition comprising a conjugate and a material of the invention. The conjugate, material and composition can be used for dentin demineralization treatment before dental bonding and restoration. When used as a dentin collagen demineralizing agent, they have excellent selective extrafibrillar demineralization performance, good biological compatibility, effective anti-bacterial activity, endogenous matrix protease-inhibiting activity and extremely low cytotoxicity.

The present invention in the field of hair spray compositions, in particular water-based hair spray compositions. There is a constant need for more environmentally friendly, more sustainable, less harsh and more affordable hair spray products which maintains the current hair spray performance or even provides a superior performance. It is therefore the object of the present invention to provide an environmentally friendly, more sustainable hair spray product providing a long-lasting hold with superior humidity resistance. It has been found that this can be obtained by a water-based aerosol composition comprising a pressure sensitive adhesive.

The present invention relates to an injectable homogeneous aqueous solution of chitosan containing, in a physiologically acceptable medium, between 0.1 and 4.5% by weight of a chitosan having a degree of acetylation less than 20% and a weight average molecular mass of between 100,000 and 1,500,000 g/mol, said solution having a pH greater than or equal to 6.2, and advantageously between 6.2 and 7.2, said solution not containing any chitosan having a degree of acetylation greater than 20%, said solution being liquid and homogeneous at ambient temperature. The invention also relates to an aqueous solution such as previously described, characterised in that it can be prepared by a method comprising at least the following steps: dissolving the chitosan in water by adding acid, such as a weak acid, said weak acid being advantageously chosen from the group consisting of acetic acid, glycolic acid, lactic acid, glutamic acid, and the mixtures of same, and readjusting the pH by dialysis, preferably at ambient temperature, in order to obtain an aqueous solution having a pH greater than or equal to 6.2, advantageously between 6.2 and 7.2, and preferably between 6.25 and 7.1.

Cationically-charged particulates and compositions containing the cationically-charged particulates for application to keratinous materials are provided. Methods of preparing the cationically-charged particulates are also disclosed. Methods of increasing the cationic charge on particulates are also provided.

The present invention is directed to chitosan-derivative compounds and structures, methods of making chitosan-derivative compounds and methods for controlling, inhibiting and enhancing microbial populations in a variety of environments. The present invention is also directed to the control, inhibition and enhancement of microbial populations in animals, particularly humans. The microbial populations include bacteria, viruses and other pathogens where control of microbial populations are a necessity. The chitosan-derivative compounds of the present invention include chitosan-arginine compounds, related chitosan-L/D unnatural amino acid compounds, chitosan-acid amine compounds, chitosan-L/D natural amino acid derivative compounds, co-derivatives of the chitosan-derivative compounds, salts of the chitosan derivative compounds, and chitosan-guanidine compounds.

Described herein, an anhydrous cosmetic composition includes a first water-absorbing component having a water vapor sorption greater than about 20 g per 100 g of the first water-absorbing component according to the Water Vapor Sorption Test Method as disclosed herein; a second water-absorbing component having a water vapor sorption from about 8.5 to about 19.9 g per 100 g of the second water-absorbing component according to the Water Vapor Sorption Test Method as disclosed herein; a malodour-controlling component; a cosmetically acceptable carrier; and wherein the anhydrous cosmetic composition is essentially free of aluminum-based antiperspirant actives.

Described herein, an anhydrous cosmetic composition includes a first water-absorbing component comprising a mixture of a superabsorbent polymer and a polyquaternium; a second water-absorbing component selected from the group consisting of starch particles, a stearate component, and mixtures thereof; a malodour-controlling component; a cosmetically acceptable carrier; and wherein the anhydrous cosmetic composition is essentially free of aluminum-based antiperspirant actives.

Described herein, an anhydrous cosmetic composition includes one or more water-absorbing components; a malodour-controlling component; a cosmetically acceptable carrier; wherein the anhydrous cosmetic composition has a burst resistance pressure greater than about 137.9 mBar (2 psi); wherein the anhydrous cosmetic composition has a water vapor sorption per 100 g of the composition from about 2.0 g to about 15 g; and wherein the anhydrous cosmetic composition is essentially free of aluminium-based antiperspirant actives.

The present application is directed to antimicrobial compositions comprising chitosan polymers of at least two different average molecular weights (Mws), wherein the Mw of each different chitosan polymer is selected to target a different microorganism as well as method of making and using the compositions and product comprising the compositions.

Disclosed are topical composition for delivery of an active agent to keratinous tissue, comprising a low molecular weight chitosan that is covalently modified chitosan with octane sulfonic acid which are attached to the chitosan via sulfonamide linkages (OsC), an effective amount of an active agent, and a carrier, and wherein the chitosan has a molecular weight of about 50 kD to about 150 kD. Also disclosed are methods of making the compositions and methods of using the compositions that entail topical application.