# US 8,785,676 B1 · Citrate co-polyesters

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- Number: US 8,785,676 B1
- Document ID: US8785676B1
- Status: Granted
- Kind: B1
- Application number: 13/374,704
- Filed: 2012-01-10
- Granted: 2014-07-22
- Earliest claimed: 2011-10-13
- Assignees: SurfaTech Corporation
- Applicants: Thomas George O'Lenick
- Inventors: Thomas George O'Lenick
- Web page: https://patentgrep.com/patent/US8785676B1

## CPC

- C08K 5/11: of acyclic polycarboxylic acids
- C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09)

## Abstract

The present invention is directed to a series of citrate ester emulsifiers that are effective in making water in oil (regular emulsions) and oil in water (invert emulsions). In addition to being outstanding emulsifiers, these emulsifiers provide unique solubility, liquidity and outstanding feel when applied to the skin, making them highly desirable in cosmetic emulsions.

## Claims

### Claim 1

A citrate co-polyesters made by the reaction of:
(a) a mixture of
(i) poly(ethylene glycol) monomethyl ether having following structure;
CH3(CH2CH2O)a—H
wherein;
a is an integer from 5 to 25;
and
(ii) fatty alcohol selected from the group consisting of:
R—OH (i)
wherein;
R is alkyl having 8 to 34 carbon atoms and may be saturated, unsaturated or R—OH is a guerbet alcohol,
with the proviso that —(CH2CH2O)aCH3 makes up 4-95%;
(b) poly(ethylene glycol) having the following structure:
HO(CH2CH2O)xH
x is an integer ranging from 5 to 25;
(c) alkyl diol having the following structure:
HOCH2(CH2)yOH
wherein;
y is an integer ranging from 2 to 11; and
(d) citric acid having the following structure:

### Claim 2 (depends on 1)

A citrate co-polyesters of claim 1 wherein a is an integer ranging from 5 to 15.

### Claim 3 (depends on 1)

A citrate co-polyesters of claim 1 a is an integer ranging from 20 to 25.

### Claim 4 (depends on 1)

A citrate co-polyesters of claim 1 wherein x is 5.

### Claim 5 (depends on 1)

A citrate co-polyesters of claim 1 wherein x is 15.

### Claim 6 (depends on 1)

A citrate co-polyesters of claim 1 wherein x is 25.

### Claim 7 (depends on 1)

A citrate co-polyesters of claim 1 wherein y is 2.

### Claim 8 (depends on 1)

A citrate co-polyesters of claim 1 wherein y is 9.

### Claim 9 (depends on 1)

A citrate co-polyesters of claim 1 wherein y is 11.