JP7246821B2 - oily cosmetics - Google Patents

Description

The present invention relates to oily cosmetics.

Jojoba seed oil is a type of wax composed of a mixture of esters of unsaturated fatty acids and unsaturated higher alcohols, with a carbon number distribution centered on C36 to C44, and provides a cosmetic with excellent usability. It was known (Non-Patent Document 1).

Edited by NIKKOL GROUP, Personal Care Handbook, pp.20-24, 2016

Although jojoba seed oil provides a good feeling during use, it has a problem of poor compatibility with other oily components and separation of jojoba seed oil over time. Therefore, an object of the present invention is to provide an oily cosmetic containing jojoba seed oil, which has good stability over time.

The present invention contains (A) jojoba seed oil, (B) a liquid oil having a viscosity of 5 to 400 mPa s at 25 ° C., and (C) a paste oil agent, and (A) 1 part by mass (B ) in an amount of 1.2 to 10 parts by mass.
Further, (B) is isononyl ethylhexanoate, isononyl isononanoate, isopropyl palmitate, isopropyl isostearate, hexyldecyl ethylhexanoate, isotridecyl isononanoate, neopentyl glycol diethylhexanoate, cetyl ethylhexanoate, isostearyl neopentanoate , octyldodecyl neopentanoate, neopentyl glycol dicaprate, caprylic/capric triglycerol, octyldodecyl neodecanoate, octyldodecyl myristate, squalane, hexyldecyl isostearate, triethylhexanoin, isostearyl isostearate, triethylhexanoic acid Trimethylolpropane, ethylhexyl hydroxystearate, octyldodecyl stearoyloxystearate, pentaerythrityl tetraethylhexanoate, trimethylolpropane triisostearate, triisostearin, pentaerythrityl tetraisostearate, diisopropyl dilinoleate, octyldodecanol and decyltetra The oily cosmetic according to claim 1, which is one or more selected from the group consisting of decanol.
Further, (C) is one or more selected from dimer acid esters, dimer diol derivatives, cholesterol fatty acid esters, phytosterol fatty acid esters, polyglycerin fatty acid esters and pentaerythritol fatty acid esters. Item 2. An oily cosmetic composition according to item 2 is provided.

The oil-based cosmetic composition of the present invention exhibits effects such as a good feel during use and good storage stability.

A mode for carrying out the present invention will be described below.

The oil-based cosmetic of the present invention can be used for any application such as cosmetics, quasi-drugs, and pharmaceuticals. In addition, the components (B) and (C) of the present invention exclude the case where they are jojoba seed oil.

The (A) jojoba seed oil used in the present invention is not particularly limited as long as it can be usually blended in cosmetics or quasi-drugs. The blending amount of jojoba oil is preferably 0.1 to 30% by mass, more preferably 1 to 30% by mass, based on the total amount of the oily raw material. If the content is less than 0.1% by mass, the effect of jojoba seed oil on improving the feeling of use of cosmetics may not be observed. If the content exceeds 30% by mass, the stability of the oily cosmetic may not be maintained.

The (B) liquid oil having a viscosity of 5 to 400 mPa·s at 25° C. used in the present invention is also a known substance and used as a general raw material for cosmetics. The viscosity of the liquid oil at 25° C. is preferably 8-350 mPa·s, more preferably 12-300 mPa·s. If the upper limit is exceeded, the spreadability is poor and the feeling of stickiness increases. The viscosity is measured with a Brookfield viscometer, spindle No. 2, 12 rpm. Examples of component (C) include isononyl ethylhexanoate (5 mPa s), isononyl isononanoate (6 mPa s), isopropyl palmitate (7 mPa s), isopropyl isostearate (10 mPa s), and hexyldecyl ethylhexanoate. (11mPa・s), isotridecyl isononanoate (12mPa・s), neopentyl glycol diethylhexanoate (13mPa・s), cetyl ethylhexanoate (13mPa・s), isostearyl neopentanoate (15mPa・s), octyl neopentanoate Dodecyl (15mPa・s), Neopentyl Glycol Dicaprate (19mPa・s), Caprylic/Capric Triglycerin (25mPa・s), Octyldodecyl Neodecanoate (25mPa・s), Octyldodecyl Myristate (27.6mPa・s) s), squalane (32 mPa s), hexyldecyl isostearate (34 mPa s), triethylhexanoin (35 mPa s), isostearyl isostearate (40 mPa s), trimethylolpropane triethylhexanoate (52 mPa s) , ethylhexyl hydroxystearate (64 mPa s), octyldodecyl stearoyloxystearate (90 mPa s), pentaerythrityl tetraethylhexanoate (110 mPa s), trimethylolpropane triisostearate (180 mPa s), triisostearin ( 185 mPa·s), pentaerythrityl tetraisostearate (290 mPa·s), diisopropyl dilinoleate (310 mPa·s), octyldodecanol (57 mPa·s), and decyltetradecanol (81 mPa·s). Among these, triisostearin and hexyldecyl isostearate are particularly preferred. The values in parentheses indicate the viscosity at 25°C.

The oily cosmetic of the present invention contains 1.2 to 10 parts by mass of (B) per 1 part by mass of (A). If the content of (B) is less than 1.2 parts by mass of (A), the stability of the oily cosmetic may not be maintained.

The paste oil (C) used in the present invention is one or more oils selected from dimer acid esters, dimer diol derivatives, cholesterol fatty acid esters, phytosterol fatty acid esters, polyglycerol fatty acid esters and pentaerythritol fatty acid esters.

These are mixtures of substances with similar structures, and because they are polycyclic compounds with high glass transition temperatures, they only partially crystallize, so they are pasty at 25°C (highly viscous liquid to semi solid) appearance and properties.

Examples of the dimer acid ester include dimer dilinoleyl bis dimer dilinoleate (behenyl/isostearyl/phytosteryl), dimer dilinoleyl bis dimer dilinoleate (phytosteryl/isostearyl/cetyl/stearyl/behenyl), etc. For example, commercially available products such as Plandool-G and Plandool-H (manufactured by Nippon Fine Chemical Co., Ltd.) can be used.

Examples of dimer diol derivatives include hydroxyalkyl (C12-14) hydroxy dimer dilinoleyl ether, hydroxyalkyl (C16-18) hydroxy dimer dilinoleyl ether, and the like. Croda Co.) and other commercial products can be used.

Examples of cholesterol fatty acid esters include cholesteryl isostearate, cholesteryl hydroxystearate, macadamia nut fatty acid cholesteryl, and lanolin fatty acid cholesteryl. Commercially available products such as YOFCO CLE-S (manufactured by Nippon Fine Chemical Co., Ltd.) can be used.

Phytosterol fatty acid esters include phytosteryl oleate, dimer dilinoleyl bis (behenyl/isostearyl/phytosteryl) dimer dilinoleate, dimer dilinoleic acid (phytosteryl/isostearyl/cetyl/stearyl/behenyl), macadamia nut oil fatty acid phytosteryl, etc. For example, commercially available products such as Salacos PO (Nisshin OilliO), YOFCO MAS, Plandool-G, Plandool-S, Plandool-H (both from Nippon Fine Chemical Co., Ltd.) can be used.

Examples of polyglycerin fatty acid esters include macadamia nut oil polyglyceryl, (isostearic acid/behenic acid) (glycerin/polyglyceryl-6) esters, and the like. etc. can be used.

Pentaerythritol fatty acid esters include dipentaerythrityl hexahydroxystearate, (hydroxystearic acid/isostearic acid) dipentaerythrityl, tetra (hydroxystearic acid/isostearic acid) dipentaerythrityl, (hydroxystearic acid/stearic acid/rosin acid) dipentaerythrityl, and the like. For example, commercial products such as Cosmol 168M, Cosmol 168E, Cosmol 168EV, and Cosmol 168AR (Nisshin Oillio) can be used. Among these pentaerythritol fatty acid esters, it is preferable to use tetra(hydroxystearic acid/isostearic acid) dipentaerythrityl.

As (C), it is preferable to use a pentaerythritol fatty acid ester in terms of the stability of the oily cosmetic. The blending amount of (C) is preferably 1 to 70% by mass, more preferably 3 to 65% by mass, based on the total amount of the oily cosmetic.

The properties of the oil-based cosmetic of the present invention are not particularly limited, and may be in the form of oil, gel, gel, solid, or the like.

A higher alcohol can be blended in the oily cosmetic composition of the present invention. The higher alcohol is not particularly limited as long as it can be blended in cosmetics. Specific examples include myristyl alcohol, cetanol, stearyl alcohol, cetostearyl alcohol, behenyl alcohol, batyl alcohol and isostearyl alcohol. Among these, it is preferable to use cetanol.

Waxes other than jojoba seed oil can be blended in the oil-based cosmetic of the present invention. Waxes are not particularly limited as long as they can be blended in cosmetics. Specific examples include beeswax, carnauba wax, sugar cane wax, palm fat, hydrogenated lanolin, and hydrogenated jojoba oil. Among these, hydrogenated jojoba oil is preferred.

The oil-based cosmetic composition of the present invention can contain, in addition to the above-described components, optional components used in ordinary cosmetics and quasi-drugs to the extent that the effects of the present invention are not impaired. Specific examples include oils, surfactants, thickeners, preservatives, perfumes, moisturizing agents, antioxidants, anti-inflammatory agents, antibacterial agents, and the like.

The oily cosmetic composition of the present invention can be prepared by a conventional method.

1 shows an example of an oil-based cosmetic of the present invention. The embodiment is merely an example of the present invention, and the present invention is not limited thereto. In addition, the compounding quantity is shown by the mass % unless there is a notice.

Examples of the present invention and evaluation methods for comparative examples are shown.
[Hardness measurement method]
Measuring equipment: RHEO METER (manufactured by Rheotech)
Penetration plunger: stainless steel diameter 20 mm
Measurement conditions: Maximum force required to move the plunger at 6 cm/min over a distance of 10 mm from the central surface Temperature: Room temperature Cosmetics: Ointment container [Method for measuring viscosity]
Measuring instrument: B-type viscometer (manufactured by Toki Sangyo Co., Ltd.)
Measurement conditions: Router No. 2, No. 4, 6 rpm 60 seconds Temperature: room temperature [storage stability]
-5°C, 5°C 24-hour cycle constant temperature bath Observe the state after 30 days of storage

Based on the description in Table 1, oil-based cosmetics were prepared by a standard method, and hardness and storage stability were observed on the next day. The results are also shown in Table 1.

Based on the description in Table 1, oil-based cosmetics were prepared by a standard method, and hardness and storage stability were observed on the next day. The results are also shown in Table 1.

As shown in Table 1, Example 1 containing 1.5 parts by mass of (B) with respect to 1 part by mass of (A) jojoba seed oil had good storage stability, whereas (A) 1 mass In Comparative Examples 1 and 2, in which less than 1.2 parts by mass of (B) was blended per part, the storage stability was not good, and oil separation was observed. As a result of the analysis, the separated component was jojoba seed oil.

Claims (1)

(A) 0.1 to 30% by mass of jojoba seed oil, (B) one or two selected from triisostearin and hexyldecyl isostearate, and (C) dimer acid ester, hydroxyalkyl (C12-14) One or more pastes selected from hydroxy dimer dilinoleyl ether, hydroxyalkyl (C16-18) hydroxy dimer dilinoleyl ether, cholesterol fatty acid ester, phytosterol fatty acid ester, polyglycerin fatty acid ester and pentaerythritol fatty acid ester An oil-based cosmetic containing 1 to 70% by mass of an oil agent and containing 1.2 to 10 parts by mass of (B) per 1 part by mass of (A).