Composition comprising a buffered lactic acid

Patent metadata

Field	Value
Publication number	US-9962324-B2
Application number	US-201314892058-A
Country	US
Kind code	B2
Filing date	May 30, 2013
Priority date	May 30, 2013
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A composition including a buffered lactic acid having a pH within the range of from 3.0 to 6.5 is disclosed. The composition is a lubricant composition and has a water activity of from 0.03 to 0.60. The friction between the absorbent product and the skin/mucous membrane of the user is reduced when in contact with the skin or mucous membrane of the user. An additional advantage is that the composition has a pH in the acidic range which is close to the pH of the skin and/or mucous membrane.

First claim

The invention claimed is:

1. A lubricant composition suitable for contacting mucous membrane or skin, comprising a buffered lactic acid present in an amount from 60 to 100 weight-%, based on the total weight of the lubricant and having a pH within the range of from 3.0 to 6.5, wherein the composition has a water activity of from 0.30 to 0.80, wherein the desired water activity has been obtained by drying.

2. A method for protecting skin and/or mucous membrane against chafing, comprising applying to the skin and/or mucous membrane a layer of the lubricant composition according to claim 1 .

3. A method for protecting skin and/or mucous membrane against chafing, comprising applying to at least a portion of a hygiene and/or an absorbent product a layer of the lubricant composition according to claim 1 , wherein the composition is brought in contact with the skin of the wearer during use.

4. The lubricant composition according to claim 1 , wherein the pH of the composition is within the range of from 3.5 to 5.5.

5. The lubricant composition according to claim 1 , wherein the water activity is from 0.30 to 0.60.

6. The lubricant composition according to claim 1 , wherein a salt buffering the lactic acid in the composition is an alkali metal salt of lactic acid.

7. The lubricant composition according to claim 6 , wherein the alkali metal salt is potassium lactate.

8. The lubricant composition according to claim 1 , wherein the composition also comprises an essentially water-free additive.

9. The lubricant composition according to claim 8 , wherein the water-free additive is naturally essentially water-free.

10. The lubricant composition according to claim 8 , wherein the water-free additive is dried to be essentially water-free.

11. The lubricant composition according to claim 10 , the water-free additive is chosen from the group consisting of botanical actives, prebiotic substances, probiotic bacteria, minerals, inorganic additives, salts and vitamins.

12. The lubricant composition according to claim 1 , wherein the amount of the buffered lactic acid in the lubricant is about 100 weight-%, based on the total weight of the lubricant.

13. The lubricant composition according to claim 1 , wherein the pH of the composition is within the range of from 3.5 to 5.5, wherein the water activity is from 0.34 to 0.80, and wherein a salt buffering the lactic acid in the composition is potassium lactate.

14. An absorbent product comprising the lubricant composition according to claim 1 .

15. A lubricant composition suitable for contacting mucous membrane or skin, consisting of a buffered lactic acid present in an amount from 10 to 100 weight-%, based on the total weight of the lubricant and having a pH within the range of from 3.0 to 6.5 and optionally a water-free additive chosen from the group consisting of botanical actives, prebiotic substances, minerals, inorganic additives, salts and vitamins, wherein the composition has a water activity of from 0.30 to 0.80, wherein the desired water activity has been obtained by drying.

16. The lubricant composition according to claim 15 , consisting of 0 to 40% by weight water-free additive, based on the total weight of the lubricant and of 60 to 100 wt. % buffered lactic acid.

17. An absorbent product comprising the lubricant composition according to claim 15 .

Assignees

• Sca Hygiene Prod Ab

Inventors

• Husmark Ulrika
• Forsgren Brusk Ulla
• Stridfeldt Chatrine

Classifications

• A61Q17/00

  Barrier preparations; Preparations brought into direct contact with the skin for affording protection against external influences, e.g. sunlight, X-rays or other harmful rays, corrosive materials, bacteria or insect stings · CPC title

• A61L15/50

  Lubricants; Anti-adhesive agents · CPC title

• A61L15/20 Primary

  containing organic materials · CPC title

• A61K31/19 Primary

  Carboxylic acids, e.g. valproic acid (salicylic acid A61K31/60) · CPC title

• A61F2013/8455

  being lubricants · CPC title