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Partial esters of polyglycerol with at least one carboxylic acid and one polyfunctional carboxylic acid, their preparation and use

A technology of multifunctional carboxylic acid and glycerin partial ester, which is applied in the preparation of carboxylic acid esters, organic compounds, skin care preparations, etc., and can solve the problems of limited stability of emulsions and low flexibility of preparations

Active Publication Date: 2016-08-10
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these combinations are also often characterized by limited emulsion stability and low formulation flexibility

Method used

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  • Partial esters of polyglycerol with at least one carboxylic acid and one polyfunctional carboxylic acid, their preparation and use
  • Partial esters of polyglycerol with at least one carboxylic acid and one polyfunctional carboxylic acid, their preparation and use
  • Partial esters of polyglycerol with at least one carboxylic acid and one polyfunctional carboxylic acid, their preparation and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0147] Embodiment 1: Emulsifier 1:

[0148] Under introduction of nitrogen, 90 g of polyglycerol having an average OH value of 1190 mg KOH / g was reacted with 210 g of stearic acid at 240°C. Water of reaction was distilled off. When the acid value is less than 2 mg KOH / g, cool the polyglycerol ester to 130° C., add 40 g of citric acid, and reduce the pressure to 50 mbar. The water generated in the reaction was separated and removed again. When the acid number is <50, the vacuum is broken with nitrogen and the product is extracted.

[0149] OH value: 237mg KOH / g

[0150] AV: 45mg KOH / g

[0151] Saponification value: 189mg KOH / g

Embodiment 2

[0152] Embodiment 2: Emulsifier 2:

[0153] Under introduction of nitrogen, 137.2 g of polyglycerol having an average OH value of 1120 mgKOH / g was reacted with 254.8 g of stearic acid at 240°C. Water of reaction was distilled off. When the acid value is less than 2 mg KOH / g, cool the polyglycerol ester to 130° C., add 8 g of citric acid, and reduce the pressure to 50 mbar. The water formed during the reaction was again separated off. When the acid value was <1, the vacuum was broken with nitrogen and the product was withdrawn.

[0154] OH value: 235mg KOH / g

[0155] AV: 2.3mg KOH / g

[0156] Saponification value: 145mg KOH / g

Embodiment 3

[0157] Embodiment 3: Emulsifier 3:

[0158] 152.8 g of polyglycerol having an average OH value of 1000 mg KOH / g was reacted with 229.2 g of stearic acid at 240° C. under introduction of nitrogen. Water of reaction was distilled off. When the acid value is less than 2 mg KOH / g, cool the polyglycerol ester to 130° C., add 18 g of citric acid, and reduce the pressure to 50 mbar. The water formed during the reaction was again separated off. When the acid value is less than 3 mg KOH / g, use nitrogen to break the vacuum and extract the product.

[0159] OH value: 241m gKOH / g

[0160] AV: 2.6mg KOH / g

[0161] Saponification value: 140mg KOH / g

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Abstract

The present invention relates to specific (poly-)glycerol partial esters having at least one carboxylic acid and one polyfunctional carboxylic acid, their use as emulsifiers and formulations comprising said partial esters according to the invention.

Description

technical field [0001] The invention relates to specific (poly-)glycerol partial esters having at least one carboxylic acid and one polyfunctional carboxylic acid, their use as emulsifiers and preparations comprising the partial esters according to the invention. Background technique [0002] In recent years there has been a strong trend in the cosmetics market towards the most natural products possible. In order to be able to meet this demand, it is necessary to be able to provide high-performance emulsifiers based on renewable raw materials. Emulsifiers commonly used in cosmetics often contain polyethylene glycol groups (PEG) as hydrophilic groups; they can be prepared by polymerization of ethylene oxide obtained by petrochemical routes. Since all raw materials used in formulations that are as natural as possible should originate from renewable resources, the use of PEG-containing emulsifiers in these formulations is undesirable. Polyglycerides are a preferred PEG-free o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C69/704C07C67/08B01F17/38A61K8/37A61K47/14A61Q17/04A61Q19/00C09K23/38C09K23/52C09K23/56
CPCA61K8/365A61K8/368A61K8/37A61K8/375A61K2800/52A61Q5/00A61Q15/00A61Q17/04A61Q19/00A61Q19/04C07C69/704C08G63/668
Inventor H·H·文克J·迈尔S·伯格弗里德H·福查
Owner EVONIK OPERATIONS GMBH
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