# US 2019/0167554 A1 · CONCENTRATED AND SELF-PRESERVING COMPOSITIONS OF MILD SURFACTANTS FOR TRANSPARENT AND SKIN-pH PERSONAL CARE FORMULATIONS

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- Number: US 2019/0167554 A1
- Document ID: US20190167554A1
- Status: Published application
- Kind: A1
- Application number: 15/559,379
- Filed: 2015-08-03
- Published: 2019-06-06
- Earliest claimed: 2015-03-16
- Assignees: Galaxy Surfactants Ltd.
- Applicants: Galaxy Surfactants Ltd.
- Inventors: Arpit WANKHADE; Bhagyesh Jagannath SAWANT; Pritesh MHATRE; Nirmal KOSHTI; Pooja Vaidya KSHIRSAGAR; Ashwini BALLAL; Anuradha SHARMA; Kumar RAUNAK
- Web page: https://patentgrep.com/patent/US20190167554A1

## CPC

- A61K 8/58: containing atoms other than carbon, hydrogen, halogen, oxygen, nitrogen, sulfur or phosphorus
- A61K 8/42: Amides
- A61K 8/44: Aminocarboxylic acids or derivatives thereof, e.g. aminocarboxylic acids containing sulfur; Salts; Esters or N-acylated derivatives thereof
- A61K 8/466: {containing sulfonic acid derivatives; Salts}
- A61Q 5/02: Preparations for cleaning the hair
- A61Q 19/10: Washing or bathing preparations
- A61K 2800/262: Transparent; Translucent
- A61K 2800/30: Characterized by the absence of a particular group of ingredients
- A61K 2800/5922: At least two compounds being classified in the same subclass of A61K8/18
- A61K 2800/596: Mixtures of surface active compounds
- A61K 2800/72: Hypo-allergenic
- A61K: PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES (devices or methods specially adapted for bringing pharmaceutical products into particular physical or administering forms A61J3/00; chemical aspects of, or use of materials for deodorisation of air, for disinfection or sterilisation, or for bandages, dressings, absorbent pads or surgical articles A61L; soap compositions C11D)
- A61Q: SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS

## Abstract

The invention relates to aqueous, high active, self-preserving composition of mild surfactants which are used to create transparent liquid formulations with pH similar to skin's pH. More specifically, the composition comprise of sodium/potassium acyl isethionate of Formula I and mono potassium acyl glutamate of Formula II with solids content of at least 45% w/w, for personal care formulation that are ultra-mild, with skin pH and transparent.

## Claims

### Claim 1

A mild surfactant composition comprising;
(i) aqueous blend of O-acyl isethionates of Formula I and monopotassium N-acyl glutamate of Formula II;
wherein, R is selected from C5 to C21 alkyl group, saturated or unsaturated, R1 is selected from H or methyl, X is selected from Na+ or K+ and prepared by the process, comprising steps of
A) reacting more than one equivalence of fatty acid chloride with alkali metal hydroxyalkyl sulphonates to prepare compounds of Formula I,
B) reacting the reaction mass of step (A) (containing the remainder fatty acid chloride) with glutamic acid in the presence of a potassium hydroxide under typical aqueous Schotten Baumann reaction conditions to form compounds of Formula II; wherein, the molar ratio of O-acyl isethionates of Formula I to N-acyl glutamate of Formula II is in range of 1.0:1.0 to 1.0:10.0, and
(ii) 0.5 to 2% by weight mixture of N-undecylenoyl glycine and N-capryloyl glycine;
wherein, the total solids content of the composition is at least 45% w/w and the pH of the said aqueous composition is below 6.5.

### Claim 2 (depends on 1)

The surfactant composition of claim 1 wherein glutamic acid is selected from L-glutamic acid or D-glutamic acid or mixture thereof.

### Claim 3 (depends on 1)

The surfactant composition as claimed in claim 1, wherein the mixture of N-undecylenoyl glycine and N-capryloyl glycine is in the ratio of 1:1.

### Claim 4 (depends on 1)

The surfactant composition as claimed in claim 1, which is self-preserving.

### Claim 5 (depends on 1)

The personal care formulation using the aqueous surfactant composition of claim 1.

### Claim 6 (depends on 1)

The transparent, skin-pH personal care formulation using the aqueous surfactant composition of claim 1.

### Claim 7 (depends on 5)

The personal care formulation as claimed in claim 5 is selected from shampoo, hand wash, body wash, face wash, shower gel, and baby bubble bath.

### Claim 8 (depends on 1)

The surfactant composition as claimed in claim 1 containing other cosmetic benefit agents.