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Personal care products containing high refractive index esters and methods of preparing the same

a technology of refractive index and esters, which is applied in the field of personal care products containing high refractive index esters and methods of preparation, can solve the problems of undesirable elimination of esters and difficult to achieve these properties, and achieve the effects of high refractive index, improved shine, gloss and/or clarity

Inactive Publication Date: 2005-10-13
INOLEX INVESTMENT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009] The invention provides personal care compositions containing, liquid, light viscosity, non-irritating, non-penetrating polyol polyesters esters having high refractive indices, preferably greater than about 1.5 at 25° C. These personal care compositions, depending on their underlying formulation, exhibit improved shine, gloss, and / or clarity in comparison to prior art formulations.

Problems solved by technology

In personal care products where clarity, shine and or / gloss may be desirable, the relatively low refractive indices of most ester oils makes it difficult to achieve these properties, as the formulations also contain primarily compounds of lower refractive indices, such as castor oil, high viscosity silicones (e.g., 100 centipoise to 1000 centipoise), film formers, and / or high viscosity esters.
Yet, elimination of these compounds is undesirable as well, because of the advantageous properties they contribute to the formulation.

Method used

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  • Personal care products containing high refractive index esters and methods of preparing the same
  • Personal care products containing high refractive index esters and methods of preparing the same
  • Personal care products containing high refractive index esters and methods of preparing the same

Examples

Experimental program
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Effect test

example 1

[0042] Propylene glycol and benzoic acid were charged to a stirred batch reactor in a molar ratio of 1.02:2.00 and heated with inert gas sparging to 120 to 225° C. in the presence of a small quantity of a sulfonic acid catalyst. The acid value was monitored, and the reaction was stopped before the acid value reached 0.5. Remaining trace acid was neutralized with 15% sodium carbonate solution. The neutralized ester was then deodorized by steam stripping, and further purified with activated carbon, and then filtered. Table 1 shows the properties obtained.

TABLE 1Properties of propylene glycol dibenzoate ester.PropertyResultColor, APHA10Acid Value, mg KOH / g0.01Kinematic Viscosity@25° C., cSt70OdorFaintRefractive Index@25° C.1.545

This propylene glycol dibenzoate ester was incorporated into a personal care formulation to prepare a personal care composition.

example 2

[0043] Ethylene glycol and benzoic acid were charged to a stirred batch reactor in a molar ratio of 1.02:2.00 and heated with inert gas sparging to 120 to 225° C. in the presence of a small quantity of catalyst, sulfonic acid catalyst. The acid value was monitored, and the reaction was stopped before the acid value reached 0.5. Remaining trace acid was neutralized with a 15% sodium carbonate solution. The neutralized ester was then deodorized by steam stripping, and further purified with activated carbon, and then filtered. Table 2 shows the properties obtained.

TABLE 2Properties of ethylene glycol dibenzoate ester.PropertyResultColor, APHA5Acid Value, mg KOH / g0.01Kinematic Viscosity@25° C., cSt54OdorFaintRefractive Index@25° C.1.552

example 3

[0044] The following composition illustrates the preparation of a personal care composition of the invention that is a styling spray for the hair that provides a high degree of shine in addition to the ordinary benefits achieved through use of a hair spray or styling spray. A styling spray formulation was devised and a polyol polyester in accordance with the invention was incorporated, as follows. The personal care composition styling spray contain the following ingredients:

Formulation IngredientsParts By Weight %SD Alcohol 40-B80.00Neopentyl glycol diheptanoate (and) isododecane5.00VP / VA Copolymer (and) Water5.00

[0045] The ingredients were combined in a vessel with gentle agitation with propylene glycol dibenzoate (10.00 wt %) until a clear, uniform solution is obtained. The mixture was then poured into a suitable container. The resultant styling spray imparted a shine to the hair when applied.

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Abstract

The invention includes personal care compositions and methods of preparing these personal care compositions that include incorporation of a polyol polyester that is the reaction product of an aliphatic polyol that does not contain an ether group, and benzoic acid, wherein the resultant polyol polyester has a refractive index at 25° C. of greater than about 1.5. The aliphatic polyol may have two to three carbon atoms. Alternatively, the invention includes personal care compositions and methods of preparing personal care compositions including incorporating a polyol polyester into a personal care formulation. The polyol polyester is represented by formula (I): wherein R is an aliphatic alkyl group that does not contain an ether group and has a refractive index of greater than about 1.5 at 25° C. Also described are methods of preparing personal care compositions comprising a first phase and a second phase, wherein the second phase contains any of the polyol polyesters described above.

Description

BACKGROUND OF THE INVENTION [0001] Conventional personal care products including cosmetic compositions that are topically applied to the skin and hair often contain ester oils. Incorporation of ester oils into these products provides benefits such as improvement of the softness and smoothness of the skin and conditioning effects to the hair (for example, by reducing the force required to comb wet or dry hair). When incorporated into personal care products, ester oils tend to contribute substantiveness, e.g, they adhere to the substrate (hair shaft or stratum corneum) due to their polarity and they additionally provide the aforementioned benefits without contributing negative aesthetics such as oiliness and greasiness. [0002] Shine, gloss, and clarity are attributes that are often highly desired in personal care products, especially those that are applied to the skin, hair and nails. For example, shine and gloss are especially important in products such as lipsticks, lip glosses (cle...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A61K8/37A61Q1/00A61Q3/00A61Q19/00
CPCA61K8/375A61Q1/06A61Q19/00A61Q15/00A61Q5/06
Inventor BURGO, ROCCO
Owner INOLEX INVESTMENT CORP
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