Title:
CHITOSAN DERIVATIVE AND METHOD FOR PRODUCING SAME, O/W-TYPE EMULSIFICATION COMPOSITION, AND COSMETIC MATERIAL
Document Type and Number:
WIPO Patent Application WO/2023/002959
Kind Code:
A1
Abstract:
Provided are: a chitosan derivative which has an excellent emulsification ability and a high salt-forming rate, and from which it is possible to prepare an emulsification composition such as a highly stable milky lotion by finely dispersing various oils in water; and a method for producing the chitosan derivative. This chitosan derivative is obtained by introducing an amine-carboxylate group derived from a salt-forming agent and an acyl group derived from an acylation agent, into a chitosan having a degree of deacetylation of 70-100% and a weight average molecular weight of 120,000-3,000,000, such that the value of a ratio (A/S) of the introduction rate (A) of the acyl group with respect to the introduction rate (S) of the amine-carboxylate group becomes 9-70. The chitosan derivative is produced by reacting the acylation agent and the salt-forming agent with the chitosan in a state where the chitosan having a particle size that would pass through a 1 mm-opening mesh is dispersed in a reaction solvent containing an alcohol-based solvent.
More Like This:
| JP2005002078 | WATER-BASED LIQUID COSMETIC |
| JP6449834 | Additives and products containing oligoesters |
| JP6732957 | System for distributing cosmetic products |
Inventors:
ICHINOMIYA YOSUKE (JP)
KOBAYASHI NOBUYUKI (JP)
KOBAYASHI NOBUYUKI (JP)
Application Number:
PCT/JP2022/027925
Publication Date:
January 26, 2023
Filing Date:
July 15, 2022
Export Citation:
Assignee:
DAINICHISEIKA COLOR CHEM (JP)
International Classes:
A61Q1/00; A61K8/04; A61K8/73; C08B37/08
Foreign References:
| JP2005281425A | 2005-10-13 | |||
| JP2000212203A | 2000-08-02 |
Other References:
HAYAKAWA, SHIN'ICHI : "1B06 Partially Acylated Chitosan as a Polymer Surfactant", PROCEEDINGS OF THE 37TH ANNUAL MEETING OF THE JAPAN OIL CHEMISTS' SOCIETY; KYOTO, JAPAN; SEPTEMBER 16-17, 1998, vol. 37, 1 January 1998 (1998-01-01), pages 42, XP009543068
Attorney, Agent or Firm:
KONDO Rieko et al. (JP)
Download PDF: