Back to results
US 4,585,797 AGranted
Cosmetic and pharmaceutical sheet material containing polypeptides
AssigneeSeton Company
InventorGheorghe Cioca
Life of this patent
Estimating the term…
Abstract
A flexible continuous film is comprised of a physical admixture of a polypeptide, a plasticizer and a film-forming flexible polymer. When the film is moistened, the polypeptides exude therefrom.
Claims8
A flexible continuous film comprising a homogeneous physical admixture of:
- a polypeptide selected from the group consisting of collagen, elastin and polypeptides derived from collagen and elastin and having a molecular weight of at least 2,000 to 20,000, wherein when said polypeptide is derived from collagen and elastin it is present at a level of 25 to 75 percent by weight based on the weight of the admixture and when said polypeptide is collagen or elastin it is present at a level of 3 to 5 percent by weight based on the weight of said admixture;
- 20 to 40 percent by weight of a water soluble non-volatile plasticizer having a boiling point in excess of about 150.degree. C.;
- and
- 10 to 20 percent by weight of a film-forming polyvinyl alcohol which is soluble in hot water and insoluble in cold water;
- said film, when moistened, will exude said polypeptide while remaining as a continuous film.
2 more elements
Dependencies are inferred from the claim text.