JP-7855189-B2 - Solubilizer

JP7855189B2JP 7855189 B2JP7855189 B2JP 7855189B2JP-7855189-B2

Inventors

増田沙恵佳
村社敬子

Assignees

日光ケミカルズ株式会社

Dates

Publication Date: 20260508
Application Date: 20220202

Claims (2)

A solubilizing agent containing the following components (A) to (C) as essential components , characterized in that component (A) and component (B) are blended in a ratio of 1:1 to 15:1, and component (C) is blended in a ratio of 5:1 to 50:1 with respect to the mixture of component (A) and component (B) . (A) Polyoxyethylene polyoxypropylene alkyl ether having a linear or branched alkyl group with 15 to 35 carbon atoms, with an average number of added moles of oxyethylene groups of 20 to 30 moles and an average number of added moles of oxypropylene groups of 5 to 10 moles. (B) Polyoxyethylene glyceryl fatty acid ester having a linear or branched alkyl group with 6 to 18 carbon atoms, with an average number of added moles of oxyethylene groups of 3 to 20 moles. (C) Acylmethyl taurine type surfactant.
Furthermore, the solubilizer according to claim 1, further comprising (D) a polyhydric alcohol.

Description

This invention relates to a solubilizer for oil-soluble substances. In cosmetics and fragrances, solubilizers are used to stably incorporate oil-soluble substances that do not dissolve in water into water, thereby obtaining transparent cosmetic products. Conventionally, there have been reports of solubilizing oral compositions by combining oil-soluble fragrances with polyoxyethylene hydrogenated castor oil and polyoxyethylene polyoxypropylene alkyl ethers (Patent Document 1). Furthermore, a solubilizer has been reported that can maintain a stable solubilized state even over a wide temperature range, with drastic temperature changes, and under light irradiation by using polyoxyalkylene alkyl ethers and nonionic surfactants such as polyoxyalkylene castor oils and anionic surfactants in a certain ratio (Patent Document 2). However, while solubilizers containing polyoxyalkylene castor oil are commonly used, high transparency may not be achieved depending on the type of fragrance, and challenges remain even with the above technology. Therefore, it is necessary to investigate how to achieve better transparency. Japanese Patent Publication No. 2020-002042Japanese Patent Publication No. 2020-121242 The embodiments for carrying out the present invention will be described in more detail below. The (A) polyoxyethylene polyoxypropylene alkyl ether used in the present invention has a linear or branched alkyl group having 15 to 35 carbon atoms, and is characterized in that the average number of added moles of oxyethylene groups is 1 to 40 moles and the average number of added moles of oxypropylene groups is 3 to 15 moles. The ratio of oxyethylene groups to the total number of oxyethylene groups and oxypropylene groups is not particularly limited. The average number of moles of oxyethylene groups added is 1 to 40, preferably 5 to 40, and more preferably 10 to 40. The average number of moles of oxypropylene groups added is 3 to 15, preferably 3 to 12, and more preferably 3 to 10. Specifically, examples include PEG-6PPG-7 ethylhexyl ether, PPG-3 laureth-10, PPG-3 buteth-5, PPG-4 isodeceth-10, PPG-4 ceteth-1, PPG-4 ceteth-10, PPG-10 buteth-9, PPG-12 buteth-12, PPG-12 buteth-16, PPG-15 buteth-20, PPG-6 decyltetradeceth-12, PPG-6 decyltetradeceth-20, PPG-6 decyltetradeceth-30, PPG-13 decyltetradeceth-24, PPG-6 trideceth-8, PPG-8 ceteth-1, PPG-8 ceteth-10, PPG-8 ceteth-20, and the like. Preferably, these are PPG-4-isodeceth-10, PPG-6-decyltetradeceth-12, PPG-6-decyltetradeceth-20, PPG-6-decyltetradeceth-30, PPG-8-ceteth-10, and PPG-8-ceteth-20. The polyoxyethylene polyoxypropylene alkyl ether (A) in this invention is not particularly limited depending on the intended use, but can be produced by known methods. Examples of commercially available polyoxyethylene polyoxypropylene alkyl ethers include "NIKKOL SG-DTD630" (manufactured by Nikko Chemicals Co., Ltd.), "NIKKOL PBC-44" (manufactured by Nikko Chemicals Co., Ltd.), "Unilube MT-0630B" (manufactured by NOF Corporation), and "Unisafe 20P-8" (manufactured by NOF Corporation). The (B) polyoxyethylene glyceryl fatty acid ester used in the present invention is characterized by having a linear or branched alkyl group having 6 to 18 carbon atoms, and an average number of added oxyethylene groups of 3 to 20 moles. Examples of fatty acids having 6 to 18 carbon atoms that constitute the fatty acid in (B) polyoxyethylene glyceryl fatty acid ester include caproic acid, caprylic acid, capric acid, undecylic acid, undecylenic acid, lauric acid, myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, and linolenic acid, among which caprylic acid, capric acid, lauric acid, myristic acid, stearic acid, and oleic acid are preferred. In addition, the fatty acids constituting the fatty acid in (B) polyoxyethylene glyceryl fatty acid ester may contain small amounts of fatty acids other than saturated or unsaturated fatty acids in the range of 6 to 18 carbon atoms, as long as the effects targeted by the present invention are achieved. Furthermore, the average number of moles of oxyethylene groups added to (B) polyoxyethylene glyceryl fatty acid ester is 3 to 20, preferably 3 to 15, and more preferably 3 to 10. Specifically, examples include PEG-4 (caprylic/capric acid) glyceryl, PEG-6 (caprylic/capric acid) glyceryl, PEG-6 caprate glyceryl, PEG-3 coconut oil fatty acid glyceryl, PEG-7 coconut oil fatty acid glyceryl, PEG-20 almond oil fatty acid glyceryl, PEG-20 corn oil fatty acid glyceryl, PEG-8 laurate glyceryl, PEG-12 laurate glyceryl, PEG-20 laurate glyceryl, PEG-10 oleate glyceryl, PEG-15 oleate glyceryl, PEG-20 oleate glyceryl, PEG-5 stearate glyceryl, PEG-10 stearate glyceryl, and PEG-20 stearate glyceryl. Preferably, the glycerides are PEG-6 caprate glyceryl, PEG-3 cocoate glyceryl, PEG-7 cocoate glyceryl, PEG-8 laurate glyceryl, PEG-10 oleate glyceryl, PEG-5 stearate, and PEG-10 stearate. The polyoxyethylene glyceryl fatty acid ester (B) in this invention is not particular