Personal cleansing soap bar composition

Patent metadata

Field	Value
Publication number	US-11938202-B2
Application number	US-201917055150-A
Country	US
Kind code	B2
Filing date	Jun 3, 2019
Priority date	Jun 11, 2018
Publication date	Mar 26, 2024
Grant date	Mar 26, 2024

Abstract

A personal cleansing soap bar composition is provided, comprising: a soap; an aqueous ethylene acrylic acid copolymer dispersion; a silicone copolymer emulsion with an internal phase viscosity at 25° C. of ≥100×10 6 mm 2 /sec; wherein the personal cleansing soap bar is a solid.

First claim

We claim:

1. A personal cleansing soap bar composition, comprising:
60 to 90 wt % of a soap;
0.25 to 0.35 wt % of an aqueous ethylene acrylic acid copolymer dispersion;
0.25 to 0.35 wt % of a silicone copolymer emulsion with an internal phase viscosity at 25° C. of ≥120×10 6 mm 2 /sec; wherein the silicone copolymer emulsion has an average particle size of <1 micron;
wherein the personal cleansing soap bar is a solid.

2. The personal cleansing soap bar composition of claim 1 , wherein the aqueous ethylene acrylic acid copolymer dispersion, comprises:
an ethylene acrylic acid copolymer, comprising 15 to 30 wt %, based on weight of the ethylene acrylic acid copolymer, of structural units of acrylic acid; and 70 to 85 wt %, based on weight of the ethylene acrylic acid copolymer, of structural units of ethylene;
a neutralizing agent and
water;
wherein at least some of the structural units of acrylic acid in the copolymer have been neutralized by the neutralizing agent.

3. The personal cleansing soap bar composition of claim 1 , further comprising:
0.1 to 5 wt % of a humectant;
0.05 to 2 wt % of a processing aid;
0.01 to 0.5 wt % of a chelating agent;
0.1 to 10 wt % of additional water.

4. The personal cleansing soap bar composition of claim 1 ,
wherein the silicone copolymer emulsion has an average particle size of less than or equal to 0.7 micron.

5. The personal cleansing soap bar composition of claim 4 , wherein the silicone copolymer emulsion comprises:
the silicone copolymer;
at least one surfactant; and
water.

6. The personal cleansing soap bar composition of claim 5 , wherein the silicone copolymer emulsion contains 60 wt % silicone.

7. The personal cleansing soap bar composition of claim 6 , wherein the silicone copolymer is an addition reaction product of: a polysiloxane with reactive groups on both termini and at least one silicone compound or non-silicone compound comprising an average of 1 to 2 moieties capable of reaction with the termini of the polysiloxane in the presence of a metal containing catalyst.

8. The personal cleansing soap bar composition of claim 7 , wherein the polysiloxane has the following formula:

wherein R 1 is a group capable of reacting by chain addition reaction; R 2 is selected from the group consisting of alkyl, cycloalkyl, aryl and alkylaryl; n is an average number selected such that the polysiloxane has a viscosity of 1 mm 2 /sec to 1×10 6 mm 2 /sec.

9. The personal cleansing soap bar composition of claim 1 , further comprising at least one of: a pH adjusting agent, a biocide, a fragrance, a colorant and a soap.

10. A method of making a personal cleansing soap bar composition, comprising:
providing a soap;
providing an aqueous dispersion comprising an ethylene acrylic acid copolymer;
providing a silicone copolymer emulsion with an internal phase viscosity of >120×10 6 mm 2 /sec and an average particle size of <1 micron;
mixing the soap, the aqueous dispersion, and the silicone copolymer emulsion to form a combination;
milling the combination;
extruding the milled combination; and
stamping the extruded material to provide the personal cleansing soap bar; wherein the personal cleansing soap bar comprises:
60 to 90 wt % of the soap;
0.25 to 0.35 wt % of the aqueous ethylene acrylic acid copolymer; and
0.25 to 0.35 wt % of the silicone copolymer emulsion.

Assignees

• Dow Global Technologies Llc

Inventors

• Gadgil Sandeep S
• Deshmukh Rishikesh
• Dandekar Deepak

Classifications

• A61K8/0216 Primary

  Solid or semisolid forms · CPC title

• A61K8/8147

  Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers · CPC title

• A61K8/895

  containing silicon bound to unsaturated aliphatic groups, e.g. vinyl dimethicone · CPC title

• A61Q19/10

  Washing or bathing preparations · CPC title

• A61K2800/21

  Emulsions characterized by droplet sizes below 1 micron · CPC title