Composition for regenerating the collagen of connective skin tissue and a process for its preparation

• US 4,668,516 A
• Filed: 11/28/1984
• Issued: 05/26/1987
• Est. Priority Date: 03/30/1983
• Status: Expired due to Fees

• Current Assignee: Alain Duraffourd, Jean-Max Duraffourd
• Original Assignee: Alain Duraffourd, Jean-Max Duraffourd
• Inventors: Duraffourd, Alain, Duraffourd, Jean-Max
• Primary Examiner(s): Brown, Johnnie R.
• Assistant Examiner(s): Rollins, John W.
• Application Number:
  US06/689,050
• Time in Patent Office: 909 Days
• Field of Search: 424/196.1, 424/195.1, 514/474, 514/454
• US Class Current: 424/770
• CPC Class Codes: A61K 2800/52 Stabilizers
• CPC Class Codes: A61K 2800/522 Antioxidants; Radical scavengers
• CPC Class Codes: A61K 8/37 Esters of carboxylic acids
• CPC Class Codes: A61K 8/498 having 6-membered rings or their condensed derivatives, e.g. coumarin
• CPC Class Codes: A61K 8/676 Ascorbic acid, i.e. vitamin C
• CPC Class Codes: A61K 8/9761 Cupressaceae [Cypress family], e.g. juniper or cypress
• CPC Class Codes: A61K 8/9767 Pinaceae [Pine family], e.g. pine or cedar
• CPC Class Codes: A61K 8/9789 Magnoliopsida [dicotyledons]
• CPC Class Codes: A61Q 19/00 Preparations for care of the skin
• CPC Class Codes: A61Q 19/08 Anti-ageing preparations

Abstract

A composition for regenerating the collagen of the connective tissue of the skin contains an aqueous conifer bark extract buffered to a pH of about 7, water-soluble flavonols and vitamin C. It is particularly useful for treating wrinkles.

Claims

1. A composition for regenerating the collagen of the connective tissue of the skin, containing an aqueous extract of at least one member selected from the group consisting of bark and needles of pine and cypress, said extract containing buffer in an amount sufficient to maintain the pH of said extract at about 7, water-soluble flavonols in the form of dimers and vitamin C in an amount of about 10 mg per gram of flavonols, said composition having between 1 and 5 g per liter of said flavonols.

2. A composition according to claim 1, containing a borate-based buffer and a natural anti-oxidant compatible with the other ingredients of the composition and acceptable by the skin.

3. A process for the preparation of a composition for regenerating the collagen of the connective tissue of the skin, comprising the following steps:

(a) infusing pine bark with boiling water for about twenty minutes in the proportion of about 100 g bark per liter water, and then macerating said bark in water for about two hours to which alcohol has been added in a proportion of about 50 ml alcolol per liter water,

(b) filtering the resulting suspension and adding an anti-oxidant and a buffer in an amount sufficient to keep the pH at a value of about 7,

(c) macerating pine needles in water, in a proportion of about 100 g needles per liter water to which a buffer has been added in an amount sufficient to keep the pH at a value of about 7, and then filtering the solution, and

(d) mixing the resulting filtrate with the filtrate obtained at the end of step (b).

4. A process according to claim 3, wherein a borate is used as said buffer.

5. A process according to claim 3, wherein ethyl gallate is used as said anti-oxidant.