# US 8,465,730 B1 · Polyglycerol polyesters

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- Number: US 8,465,730 B1
- Document ID: US8465730B1
- Status: Granted
- Kind: B1
- Application number: 13/506,163
- Filed: 2012-04-02
- Granted: 2013-06-18
- Earliest claimed: 2012-02-06
- Assignees: SurfaTech Corporation
- Applicants: Thomas G. O'Lenick
- Inventors: Thomas G. O'Lenick
- Web page: https://patentgrep.com/patent/US8465730B1

## CPC

- A61K 8/39: Derivatives containing from 2 to 10 oxyalkylene groups
- A61Q 17/04: Topical preparations for affording protection against sunlight or other radiation; Topical sun tanning preparations
- 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 present invention is directed toward a series of polyesters with tunable ascetics and skin conditioning properties for use in cosmetic formulation, specifically sun screening formulations in which the performance is improved by a synergistic effect between the sunscreening actives and the polyester. These novel polyglycerol polyesters are designed to be multidimensional. The physical properties and aesthetics of the current invention can be tuned rapidly by controlling the ratio of fatty groups, as well as the cross-linker used. The resulting polyglycerol polyesters have outstanding aesthetics and physical properties.

## Claims

### Claim 1

A polyglycerol polyester that conforms to the following structure:
wherein,
R1 is an alkyl containing 8 to 26 carbons, or mixtures thereof;
R2 is an alkyl containing 8 to 26 carbons or mixtures thereof;
R3 is independently selected from an alkyl containing 2 to 12 carbons, or an alkyl confining to the following structure:
or
or mixtures thereof;
n is an integer ranging from 0 to 9;
m is an integer ranging from 0 to 9.

### Claim 2 (depends on 1)

The polyglycerol polyester of claim 1 wherein R1 and R2 are different.

### Claim 3 (depends on 1)

The polyglycerol polyester of claim 1 wherein R1 and R2 are different and R1 is an alkyl having 18 carbons.

### Claim 4 (depends on 1)

The polyglycerol polyester of claim 1 wherein R3 is

### Claim 5 (depends on 1)

The polyglycerol polyester of claim 1 wherein R2 is an alkyl having 18 carbons.

### Claim 6 (depends on 1)

The polyglycerol polyester of claim 1 wherein R3 is an alkyl having 7 carbons.

### Claim 7 (depends on 1)

The polyglycerol polyester of claim 1 wherein n is 0.

### Claim 8 (depends on 1)

The polyglycerol polyester of claim 1 wherein m is 0.

### Claim 9 (depends on 1)

The polyglycerol polyester of claim 1 wherein R1 is alkyl having 8 carbons and R2 is alkyl containing 18 carbons.

### Claim 10 (depends on 1)

A process for providing improved sun protection to the skin, which comprises contacting the skin with an effective sun protection concentration of a composition of the polyglycerol polyester of claim 1 and a sunscreening active.

### Claim 11 (depends on 10)

The process of claim 10 wherein the effective conditioning concentration ranges from 5.0% and 55.0% by weight sunscreening actives and 5% to 25% by weight polyester.

### Claim 12 (depends on 10)

The process of claim 10 wherein R1 and R2 are different.

### Claim 13 (depends on 10)

The process of claim 10 wherein R1 and R2 are different and R1 is an alkyl having 18 carbons.

### Claim 14 (depends on 10)

The process of claim 10 wherein R3 is

### Claim 15 (depends on 10)

The process of claim 10 wherein R2 is an alkyl having 18 carbons.

### Claim 16 (depends on 10)

The process of claim 10 wherein R3 is an alkyl having 7 carbons.

### Claim 17 (depends on 10)

The process of claim 10 wherein n is 0.

### Claim 18 (depends on 10)

The process of claim 10 wherein m is 0.