Multilayer type powder-containing cosmetic preparation
A technology for cosmetics and powders, applied in the field of multi-layer powder cosmetics, which can solve the problems of narrow formula range, cost consumption, and ingredient restrictions, and achieve the effects of excellent redispersibility, suppressed manufacturing costs, and expanded range
Active Publication Date: 2020-04-24
SHISEIDO CO LTD
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- Description
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- Application Information
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Problems solved by technology
[0006] However, the substance that promotes redispersion differs depending on the type (material) of the powder component to be redispersed, so the ingredients that can be blended are limited, and the range of formulations is narrow
On the other hand, there are troublesome and cost-intensive problems in the surface treatment of the powder
Method used
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Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0061] Hereinafter, the present invention will be described in more detail with examples. The present invention is not limited in any way by these examples. It should be noted that, unless otherwise specified, the compounding amount is mass% with respect to the total amount.
[0062] In the formulations of the Examples and Comparative Examples shown in the following table, a multi-layer (two-layer) powder cosmetic (deodorant lotion) was produced by a conventional method, and the redispersibility of the powder ingredients was evaluated according to the following criteria.
[0063]
[0064] "Re-dispersibility evaluation method"
[0065] 40 g of the sample (multi-layer powder cosmetics) of each example was filled in a screw tube and left to stand for one month (room temperature) to allow the powder to settle.
[0066] Every time the threaded tube was shaken up and down 5 times by hand, the redispersion of the settled powder was visually observed, and the "redispersibility index" defined...
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Abstract
The purpose of the present invention is to provide a multilayer type powder-containing cosmetic preparation which can be variously formulated and in which the powder ingredient has excellent redispersibility without being necessarily required to have undergone a surface treatment. The present invention relates to a multilayer type powder-containing cosmetic preparation characterized by comprisingthe following (a) to (c) components: (a) 60-95 mass% lower alcohol; (b) a powder ingredient (excluding (c) component); and (c) a finely particulate powder which has an average primary-particle diameter of 10-550 nm and includes silica or titanium oxide as a base.
Description
Technical field [0001] The present invention relates to a multilayer type powder cosmetic used by uniformly mixing (re-dispersing) powder. More specifically, it relates to a multilayer powder cosmetic that contains lower alcohols such as ethanol and is excellent in powder redispersibility. Background technique [0002] Multi-layer powder cosmetics are liquid preparations containing powders, and when left standing, the powder components settle and separate into layers. Especially when the liquid layer of the multi-layer powder cosmetics contains lower alcohols such as ethanol, It brings a refreshing feeling when applied, and combined with the dry touch brought by the powder ingredients, it becomes a feeling of use suitable for deodorant cosmetics, astringent cosmetics, etc. [0003] Since such multilayer powder cosmetics are used after the powder components are uniformly redispersed by shaking, it is required that the powder components have good redispersibility. In multilayer pow...
Claims
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IPC IPC(8): A61K8/25A61K8/03A61K8/29A61K8/34A61K8/36A61K8/81A61K8/894A61Q15/00
CPCA61K8/03A61K8/25A61K8/29A61K8/34A61K8/894A61Q15/00A61K8/0241A61K8/8152A61K2800/651A61K2800/654A61K8/022A61K8/26A61K8/36A61K8/81A61K2800/10A61K2800/874
Inventor 野口加奈子蛭间有喜子河野佐代子藤田纯子
Owner SHISEIDO CO LTD