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Composite particle and method for producing same, personal care product, particles for personal care and method for producing same, personal care goods, and composition for personal care

A technology for composite particles and personal care, which is applied in skin care preparations, hair care, oral care, etc. It can solve the problems of poor use feeling and inability to maintain the shape of particles, and achieve environmental load reduction, smoothness and skin affinity. Good sex and good skin affinity

Pending Publication Date: 2022-02-01
TOPPAN PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0033] As mentioned above, there is a strong desire for new fine particles that are good in skin affinity and can be applied to personal care products. However, when porous fine particles are produced by conventional methods, there are problems that the shape of the fine particles cannot be maintained and the usability is poor.

Method used

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  • Composite particle and method for producing same, personal care product, particles for personal care and method for producing same, personal care goods, and composition for personal care
  • Composite particle and method for producing same, personal care product, particles for personal care and method for producing same, personal care goods, and composition for personal care
  • Composite particle and method for producing same, personal care product, particles for personal care and method for producing same, personal care goods, and composition for personal care

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Experimental program
Comparison scheme
Effect test

no. 1 approach

[0075] Such as Figure 1A , Figure 1B , Figure 1C As shown, the composite particle 1 of the present embodiment has: a core particle 2 having pores (pore: pore) 4; at least one of the fine fibers 3 . That is, the fine fibers 3 may be only one of cellulose nanofibers and chitin nanofibers, or both may be included.

[0076] exist Figure 1A In the composite particle 1 shown, the core particle 2 has a large number of small pores 4 . which is, Figure 1A A composite particle 1 in which the core particle 2 is a porous particle is shown. In the core particle 2, there is a part where the pores 4 exist independently, and there is also a part where a plurality of pores 4 are connected together. Some of the pores 4 existing in the outer peripheral portion of the core particle 2 open on the surface of the core particle 2, and some do not.

[0077] exist Figure 1B In the composite particle 1 shown, the core particle 2 has a plurality of relatively large pores 4 . which is, Figu...

no. 2 approach

[0343] Such as Figure 4 As shown, the personal care particle 1A of the present embodiment is composed of a core particle 2A formed of a polymer-containing material, microfibers 3 bonded to the surface of the core particle 2A and in an inseparable state, and a personal care function. Functional materials40. The fine fibers 3 are either cellulose nanofibers or chitin nanofibers. The functional material 40 is carried on the fine fiber 3 . The fine fibers 3 may contain both cellulose nanofibers and chitin nanofibers.

[0344] In the present embodiment, the fine fibers 3 are formed as a coating layer covering the surface of the core particle 2A.

[0345] The method for producing the granule 1A for personal care is not particularly limited, and a known method can be used, and a chemical production method or a physicochemical production method can be used.

[0346] Examples of chemical production methods include polymerization granulation methods (emulsion polymerization method,...

Embodiment 1

[0582] (First step: step of obtaining cellulose nanofiber dispersion liquid)

[0583] {TEMPO Oxidation of Wood Cellulose}

[0584] 70 g of softwood kraft pulp was suspended in 3500 g of distilled water, a solution obtained by dissolving 0.7 g of TEMPO and 7 g of sodium bromide in 350 g of distilled water was added, followed by cooling to 20°C. Thereto, 450 g of a 2 mol / L aqueous solution of sodium hypochlorite with a density of 1.15 g / mL was added dropwise to start the oxidation reaction. The temperature in the system was kept constant at 20° C., and a 0.5 N aqueous sodium hydroxide solution was added during the reaction as the pH decreased, so that the pH continued to be kept at 10. When the total amount of sodium hydroxide added reached 3.0 mmol / g relative to the weight of cellulose, about 100 mL of ethanol was added to stop the reaction. Subsequently, filtration washing was repeated with distilled water using a glass filter to obtain oxidized pulp (oxidized cellulose).

...

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Abstract

A composite particle (1) according to an aspect of the present invention comprises: a core particle (2) having pores (4); and fine fibers (3) that are bound to the surface of the core particle (2) and are in an inseparable state. The fine fibers (3) are either or both cellulose nanofibers and chitin nanofibers.

Description

technical field [0001] The present invention relates to a composite particle, a method for producing the composite particle, and a personal care product containing the composite particle, as well as a particle for personal care, a method for producing the particle for personal care, a personal care product, and a composition for personal care. Background technique [0002] Various functional materials are added to personal care products for skin care, makeup, hair care, oral care, nail care, etc. For example, cosmetics such as foundations contain: oily raw materials such as oils and waxes; functional materials such as UV absorbers or colorants, fungicides, antioxidants, preservatives, moisturizers, vitamins, amino acids, hormones, natural extracts, etc. ; and microparticles for improving skin affinity, etc. In addition, in skin care products, functional materials are added to dispersion solvents that combine water, alcohol, or oil in any ratio. These personal care products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K8/02A61K8/73A61K8/85A61K8/81A61Q5/00A61Q11/00A61Q19/00A61Q1/00A61Q3/00A61Q15/00A61Q17/04A61Q17/00
CPCA61K8/0225A61K8/731A61K8/736A61K8/85A61K8/8117A61Q5/00A61Q11/00A61Q19/00A61Q1/00A61Q3/00A61Q15/00A61Q17/04A61Q17/005C08L1/02C08L1/04C08L5/08B82Y30/00A61K8/0279A61Q19/008A61Q19/02A61K2800/10A61K2800/624A61K2800/654A61K8/027A61K8/025A61K8/066A61K2800/413B82Y40/00C08B37/003D21B1/063
Inventor 林佑美
Owner TOPPAN PRINTING CO LTD
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