# US 10,245,225 B2 · Oil-free emollients in sunscreen compositions

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- Number: US 10,245,225 B2
- Document ID: US10245225B2
- Status: Granted
- Kind: B2
- Application number: 15/318,528
- Filed: 2015-06-16
- Published: 2017-05-11
- Granted: 2019-04-02
- Earliest claimed: 2014-06-23
- Assignees: Rohm and Haas Company
- Applicants: Rohm and Haas Company
- Inventors: Xiaodong Lu; Curtis Schwartz
- Web page: https://patentgrep.com/patent/US10245225B2

## CPC

- A61K 8/86: Polyethers
- A61K 8/37: Esters of carboxylic acids
- 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
- A61Q 19/00: Preparations for care of the skin
- A61Q 19/007: {Preparations for dry skin}
- 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

Provided are compositions that are useful as oil-free emollients and SPF and UV absorption boosters in sunscreen formulations. The emollients are oil-soluble polyalkylene glycols, wherein the polyalkylene glycol comprises units derived from propylene oxide and units derived from butylene oxide, and in certain embodiments are compounds of Formula I: RO—(PO)n—(BO)m—H (I) wherein PO is propyleneoxy, BO is butyleneoxy, R is a linear or branched C8-C20 alkyl, n has an average value of from 5 to 20, and m has an average value of from 4 to 16.

## Claims

### Claim 1

A sunscreen composition comprising:
(a) an oil-soluble polyalkylene glycol of Formula II:
wherein R is a linear or branched C8-C12 alkyl, n has an average value of from 5 to 20, and m has an average value of from 4 to 16, wherein the polyalkylene glycol has a number average molecular weight of from 500 to 5,000, and wherein the weight ratio of CH2CH(CH2CH3)O units to CH2CH(CH3)O units ranges from 4:1 to 1:4;
(b) a dermatologically acceptable carrier, wherein the dermatologically acceptable carrier is selected from the group consisting of oil-in-water emulsions or water-in-oil emulsions; and
(c) a sunscreen active,
wherein the polyalkylene glycol is present in an amount of from 2 to 10 weight %, based on the total weight of the composition.

### Claim 2 (depends on 1)

The personal care composition of claim 1, wherein R is a linear or branched C12 alkyl.

### Claim 3 (depends on 1)

The sunscreen composition of claim 1, further comprising a skin care active.

### Claim 4

A method of protecting skin from UVA and UVB damage comprising topically administering to the skin a composition comprising
(a) an oil-soluble polyalkylene glycol of Formula II:
wherein R is a linear or branched C8-C12 alkyl, n has an average value of from 5 to 20, and m has an average value of from 4 to 16, wherein the polyalkylene glycol has a number average molecular weight of from 500 to 5,000, and wherein the weight ratio of CH2CH(CH2CH3)O units to CH2CH(CH3)O units ranges from 4:1 to 1:4,
(b) a dermatologically acceptable carrier, wherein the dermatologically acceptable carrier is selected from the group consisting of oil-in-water emulsions or water-in-oil emulsions, and
(c) a sunscreen active,
wherein the polyalkylene glycol is present in an amount of from 2 to 10 weight %, based on the total weight of the composition.