Transparent soap bar

Patent metadata

Field	Value
Publication number	US-11904034-B2
Application number	US-202217832784-A
Country	US
Kind code	B2
Filing date	Jun 6, 2022
Priority date	Jun 10, 2021
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

Described herein, a transparent soap bar for cleaning the skin including a soap surfactant, a synthetic surfactant, a fragrance component, an amine component, an antioxidant salt, wherein the transparent soap bar has a percent transmittance (% T) value of greater than 40% as measured using the method of Measurement of % Transmittance.

First claim

What is claimed is:

1. A transparent soap bar for cleaning the skin comprising:
about 10 wt. % to about 30 wt. % of a soap surfactant, by weight of the soap bar, wherein the soap surfactant is selected from the group consisting of alkali or alkaline earth metal, and ammonium salts of C 6 -C 18 carboxylic acids;
about 1.5 wt. % to about 30 wt. % of a synthetic surfactant, by weight of the soap bar, wherein the synthetic surfactant is selected from the group consisting of an anionic surfactant, a nonionic surfactant, and mixtures thereof;
about 0.01 wt. % to about 2 wt. % of a fragrance component, by weight of the soap bar, wherein the fragrance component comprises ketone and/or aldehyde fragrance components;
about 0.01 wt. % to about 5 wt. % of an amine component, by weight of the soap bar, wherein the amine component is selected from the group consisting of a primary amine, a secondary amine, a tertiary amine, a substituted or unsubstituted 2-pyridinol N-oxide material, an amphoteric surfactant, and mixtures thereof;
about 0.01 wt. % to about 0.5 wt. % of an antioxidant salt, by weight of the soap bar, wherein the anti-oxidant salt is selected from the group consisting of an alkali metal metabisulfite, an alkali metal sulfite, an alkali metal bisulfite and mixtures thereof; and
wherein the transparent soap bar has a percent transmittance (% T) value of greater than about 40% as measured according to the Measurement of % Transmittance method.

2. The transparent soap bar of claim 1 , wherein the anti-oxidant salt is selected from the group consisting sodium metabisulfite, sodium sulfite, potassium sulfite, sodium bisulfite, potassium bisulfite and mixtures thereof.

3. The transparent soap bar of claim 1 , wherein the soap bar comprises about 0.05 wt. % to about 0.4 wt. % of the antioxidant salt by weight of the soap bar.

4. The transparent soap bar of claim 1 , wherein the soap surfactant comprises alkali or alkaline earth metal of C 6 -C 18 carboxylic acids, wherein the C 6 -C 18 carboxylic acid is selected from the group consisting of caproic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, margaric acid, stearic acid, myristoleic acid, palmitoleic acid, sapienic acid, oleic acid, elaidic acid, vaccenic acid, linoleic acid, linoelaidic acid, α-linolenic acid, and combinations thereof.

5. The transparent soap bar of claim 4 , wherein the soap surfactant comprises a mixture of stearic acid, palmitic acid and lauric acid; and/or sodium salts thereof.

6. The transparent soap bar of claim 1 , wherein the soap bar comprises from about 0.2 wt. % to about 5.0 wt. % of the amine component by weight of the soap bar.

7. The transparent soap bar of claim 1 , wherein the substituted or unsubstituted 2-pyridinol-N-oxide material is 1-hydroxy-4-methyl-6-(2,4,4-trimethylpentyl)-2-pyridone monoethanolamine salt.

8. The transparent soap bar of claim 1 , wherein the amphoteric surfactant is selected from the group consisting of sodium lauroamphoacetate, sodium cocoamphoacetate, disodium lauroamphoacetate, disodium cocoamphodiacetate, cocamidopropyl betaine, lauramidopropyl betaine, and mixtures thereof.

9. The transparent soap bar of claim 8 , wherein the amphoteric surfactant is selected from the group consisting of cocamidopropyl betaine, sodium lauroamphoacetate, and mixtures thereof.

10. The transparent soap bar of claim 1 , when the amine component is selected from the group consisting of ethanolamine, diethanolamine, triethanolamine, cocamidopropyl betaine, lauramidopropyl betaine, cocamidopropyl hydroxysultaine, lauramidopropyl hydroxysultaine, sodium lauroamphoacetate, piroctone olamine and mixtures thereof.

11. The transparent soap bar of claim 1 , wherein the synthetic surfactant comprises an anionic surfactant, wherein the anionic surfactant is selected from the group consisting of: sodium C 8-18 is alkyl sulfate, sodium C 12-13 alkyl sulfate, sodium C 12-15 alkyl sulfate, sodium C 11-15 alkyl sulfate, sodium C 12-18 alkyl sulfate, sodium C 10-16 alkyl sulfate, sodium C 8 -C 18 alkyl aminopropionate, sodium laureth-1 sulfate, ammonium laureth-1 sulfate, triethanolamine laureth-1 sulfate, sodium tridecyl benzene sulfonate, sodium dodecyl benzene sulfonate, sodium lauroyl sarcosinate, sodium lauroyl sarcosinate, sodium cocoyl sarcosinate, sodium lauroyl methyl isethionate, sodium lauroyl isethionate, sodium cocoyl isethionate, sodium lauroyl glycinate, sodium cocoyl glycinate, potassium lauroyl glycinate, potassium cocoyl glycinate, sodium lauroyl glutamate, potassium lauroyl glutamate, sodium cocoyl glutamate, potassium cocoyl glutamate, disodium lauroyl glutamate, dipotassium lauroyl glutamate, disodium cocoyl glutamate, dipotassium cocoyl glutamate, sodium lauroyl lactylate and mixtures thereof.

12. The transparent soap bar of claim 1 , wherein the synthetic surfactant is a combination of sodium laureth(n) sulfate SLEnS, wherein n is the average moles of ethoxylation, wherein n ranges from 1 to 3 and laureth-6 carboxylic acid.

13. The transparent soap bar o of claim 1 , wherein the soap bar comprises from about 0.5 wt. % to about 15 wt. % of an anionic surfactant by weight of the soap bar.

14. The transparent soap bar of claim 1 , wherein the soap bar comprises a humectant, wherein the humectant is selected from the group consisting of glycerin, propylene glycol, 1,2-butylene glycol, 1,3-butylene glycol, 1,4-butylene glycol, decylene glycol, polyethylene glycol, sorbitol, sucrose and mixtures thereof.

15. A method of preventing or reducing discoloration of a transparent soap bar, comprising:
adding about 0.01 wt. % to about 0.5 wt. % of an antioxidant salt by weight of the soap bar, wherein the anti-oxidant salt is selected from the group consisting of an alkali metal metabisulfite, an alkali metal sulfite, an alkali metal bisulfite and mixtures thereof; to a premix comprising:
about 10 wt. % to about 30 wt. % of a soap surfactant, by weight of the soap bar, wherein the soap surfactant is selected from the group consisting of alkali or alkaline earth metal, and ammonium salts of C 6 -C 18 carboxylic acids;
about 1.5 wt. % to about 30 wt. % of a synthetic surfactant, by weight of the soap bar, wherein the synthetic surfactant is selected from the group consisting of an anionic surfactant, a nonionic surfactant, and mixtures thereof;
about 0.01 wt. % to about 2 wt. % of a fragrance component, by weight of the soap bar, wherein the fragrance component comprises ketone and/or aldehyde fragrance components;
from about 0.01 wt. % to about 5 wt. % of an amine component, by weight of the soap bar, wherein the amine component is selected from the group consisting of a primary amine, a secondary amine, a tertiary amine, a substituted or unsubstituted 2-pyridinol N-oxide material, an amphoteric surfactant, and mixtures thereof;

wherein the resulting transparent soap bar has a percent transmittance (% T) value of greater than about 40% according to the Measurement of % Transmittance method.

Assignees

• Procter & Gamble

Inventors

• Wang Huan
• Chan Mingxia
• Ehrman Matthew Clair
• Makrandi Anurag

Classifications

• A61K8/0216 Primary

  Solid or semisolid forms · CPC title

• A61K8/23

  Sulfur; Selenium; Tellurium; Compounds thereof · CPC title

• A61K8/345

  containing more than one hydroxy group · CPC title

• A61K8/361

  Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof · CPC title

• A61K8/41

  Amines · CPC title