Process for preparing antimicrobial plastic bodies having improved long-time performance

• US 20070194483A1
• Filed: 04/24/2007
• Published: 08/23/2007
• Est. Priority Date: 07/30/1999
• Status: Active Grant

• Current Assignee: Andreas Hirsch, J Guggenbichler
• Original Assignee: Andreas Hirsch, J Guggenbichler
• Inventors: Hirsch, Andreas, Guggenbichler, J.
• Granted Patent: US 8,075,823 B2
• Time in Patent Office: Days
• US Class Current: 264/176.1
• CPC Class Codes: A61L 2300/102 Metals or metal compounds, e.g. salts such as bicarbonates, carbonates, oxides, zeolites, silicates
• CPC Class Codes: A61L 2300/104 Silver, e.g. silver sulfadiazine
• CPC Class Codes: A61L 2300/404 Biocides, antimicrobial agents, antiseptic agents
• CPC Class Codes: A61L 29/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
• CPC Class Codes: A61L 29/126 having a macromolecular matrix
• CPC Class Codes: A61L 29/16 Biologically active materials, e.g. therapeutic substances A61L29/048 takes precedence
• CPC Class Codes: A61M 2025/0056 provided with an antibacterial agent, e.g. by coating, residing in the polymer matrix or releasing an agent out of a reservoir
• CPC Class Codes: A61M 25/00 Catheters; Hollow probes dilators A61M29/00; peritoneal catheters A61M1/285; tracheal tubes A61M16/04; for drainage A61M27/00; for uterus, vagina or rectum A61M31/00 ; for measuring or testing A61B; materials for catheters A61L29/00
• CPC Class Codes: C08J 2375/04 Polyurethanes
• CPC Class Codes: C08J 3/2053 the additives only being premixed with a liquid phase
• CPC Class Codes: C08J 7/043 Improving the adhesiveness of the coatings per se, e.g. forming primers adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50
• CPC Class Codes: C08J 7/06 with compositions not containing macromolecular substances
• CPC Class Codes: C08K 2003/0806 Silver
• CPC Class Codes: C08K 3/08 Metals
• CPC Class Codes: C08K 9/12 Adsorbed ingredients , e.g. ingredients on carriers
• CPC Class Codes: C08L 75/04 Polyurethanes

Abstract

The present invention relates to processes for preparing an antimicrobial plastic body, said processes comprising molding a precursor and being characterized in that prior to molding at least one component of the precursor is treated with a metal colloid.

Claims

1. A process for preparing an antimicrobial plastic body, said process comprising molding a precursor, wherein inorganic particles are added to the precursor and prior to molding at least one component of the precursor is treated with a metal colloid solution wherein the metal colloid is stabilized by use of a protective agent.

2. The process as claimed in claim 1 wherein the precursor consists of one or several polymer materials.

3. The process as claimed in claim 2 wherein said precursor consists of polyurethane.

4. The process as claimed in claim 1, wherein apart from polymeric materials further additives are added to the plastic precursor.

5. The process as claimed in claim 1 wherein said inorganic particles comprise barium sulfate, calcium sulfate, strontium sulfate, titanium oxide, aluminium oxide, silicon oxide, zeolites, mica, talcum or kaolin.

6. The process as claimed in claim 5 wherein said inorganic particles comprise barium sulfate and/or fumed silica.

7. The process as claimed in claim 1 wherein one or several of the components of the precursor are treated with said colloidal metal.

8. The process as claimed in claim 4 wherein said plastic precursor as well as said inorganic particles are treated with said colloidal metal.

9. The process as claimed in claim 4 wherein said inorganic particles are treated with said metal colloid.

10. The process as claimed in claim 1 wherein said metal colloid is colloidal silver.

11. The process as claimed in claim 1 wherein said treated precursor is given its final shape by mixing, kneading, extruding, injection molding or hot press molding.

12. The process as claimed in claim 1 wherein the protective agent is selected from gelatin, silica or starch.