Material for the prevention of bedsores

• US 8,716,383 B2
• Filed: 08/09/2011
• Issued: 05/06/2014
• Est. Priority Date: 02/13/2009
• Status: Active Grant

• Current Assignee: Millet Innovation
• Original Assignee: Millet Innovation
• Inventors: Millet, Damien, Jourdan, Eric
• Primary Examiner(s): MOORE, MARGARET G
• Application Number:
  US13/205,680
• Publication Number:
  US 20120028021A1
• Time in Patent Office: 1,001 Days
• Field of Search: None
• US Class Current: 524/268
• CPC Class Codes: A61F 13/069 Decubitus ulcer bandages

Abstract

A method for manufacturing a protective layer for protecting skin and tissues in a vicinity of the skin includes the steps of: forming a mixture comprising approximately 15% of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity greater than 20,000 mPa·s, approximately 25% of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity between 200 and 20,000 mPa·s, approximately 45% of trimethyl-terminated polydimethylsiloxane, approximately 12% of trimethylsiloxy-treated pyrogenic silica, and approximately 3% of dimethyl-hydrogen-terminated co-polydimethylsiloxane-polymethyl-hydrogen-siloxane; polymerizing at least partially the mixture to obtain a polymer gel; and forming the protective layer using the polymer gel. The polymer gel has, at a temperature of 35° C. and when a shearing rate varies between 0 and 100 rad/s, a shear storage modulus or elastic component varying from 11,000 to 20,000 Pa, a shear loss modulus or viscous component varying from 700 to 8,000 Pa, and a Tan Delta varying from 0.06 to 0.38.

Claims

1. A method for manufacturing a protective layer for protecting skin and tissues in a vicinity of the skin, the method comprising the steps of:

forming a mixture comprising approximately 15 wt. % of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity greater than 20,000 mPa·

s at 20-25°

C., approximately 25 wt. % of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity between 200 and 20,000 mPa·

s at 20-25°

C., approximately 45 wt. % of trimethyl-terminated polydimethylsiloxane, approximately 12 wt. % of trimethylsiloxy-treated pyrogenic silica, and approximately 3 wt. % of dimethyl-hydrogen-terminated co-polydimethylsiloxane-polymethyl-hydrogen-siloxane;

polymerizing at least partially the mixture to obtain a polymer gel; and

forming the protective layer using the polymer gel, the polymer gel having, at a temperature of 35°

C. and when a shearing rate varies between 0 and 100 radians/second,

a shear storage modulus or elastic component varying from 11,000 to 20,000 Pa,

a shear loss modulus or viscous component varying from 700 to 8,000 Pa, and

a Tan Delta varying from 0.06 to 0.38.

2. The method according to claim 1, wherein the protective layer has an adhesiveness between 100 and 115 g/cm².

3. The method according to claim 1, wherein the protective layer has a thickness between 1 and 4 mm.

4. The method according to claim 1, wherein the protective layer has a face comprising asperities having a diameter between 2 and 20 μ

m.

5. The method according to claim 1, wherein the approximately 45 wt. % of trimethyl-terminated polydimethylsiloxane has about 5/9^ths of trimethyl-terminated polydimethylsiloxane with a viscosity lower than 100 mPa·

s at 20-25°

C. and about 4/9^ths of trimethyl-terminated polydimethylsiloxane with a viscosity greater than 20,000 mPa·

s at 20-25°

C.

6. The method according to claim 1, wherein the polymerization is performed in the presence of platinum vinylsiloxane complex.

7. A protective layer for protecting skin and tissues in a vicinity of the skin, the protective layer being formed by polymerizing at least partially a mixture to obtain a polymer gel, the mixture comprising:

approximately 15 wt. % of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity greater than 20,000 mPa·

s at 20-25°

C.,

approximately 25 wt. % of dimethyl-vinyl-terminated polydimethylsiloxane with a viscosity between 200 and 20,000 mPa·

s at 20-25°

C.,

approximately 45 wt. % of trimethyl-terminated polydimethylsiloxane,

approximately 12 wt. % of trimethylsiloxy-treated pyrogenic silica, and

approximately 3 wt. % of dimethyl-hydrogen terminated co-polydimethylsiloxane-polymethyl-hydrogen-siloxane,

the polymer gel having, at a temperature of 35°

C. and when a shearing rate varies between 0 and 100 radians/second,

a shear storage modulus or elastic component varying from 11,000 to 20,000 Pa,

a shear loss modulus or viscous component varying from 700 to 8,000 Pa, and

a Tan Delta varying from approximately 0.06 to 0.38.

8. The protective layer according to claim 7, wherein the protective layer has an adhesiveness between 100 and 115 g/cm².

9. The protective layer according to claim 7, wherein the protective layer has a thickness between 2 and 3 mm.

10. The protective layer according to claim 7 further comprising a face having asperities, the diameter of the asperities being between 2 and 20 μ

m.

11. The protective layer according to claim 7, wherein the 45 wt. % of trimethyl-terminated polydimethylsiloxane comprises about 5/9^ths of trimethyl-terminated polydimethylsiloxane with a viscosity lower than 100 mPa·

s at 20-25°

C. and about 4/9^ths ths of trimethyl-terminated polydimethylsiloxane with a viscosity greater than 20,000 mPa·

s at 20-25°

C.

12. The protective layer according to claim 7, wherein the polymerization is performed in the presence of platinum vinylsiloxane complex.

13. A product for restoring or strengthening the vasodilatation reflex of skin blood capillaries, induced by applying local pressure, the product comprising a protective layer according to claim 7.