Foamed silicone in wound care
AssigneeMölnlycke Health Care AB
InventorsLars Lindgren, Dennis Hansson, Shiva Eibpoosh
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Abstract
A silicone foam is described that is produced in-situ at a wound site, e.g. in a wound cavity, through a multi-component system, based on a physical foaming process, wherein the gas required to form the foam structure is provided through a blowing agent independently of the curing reaction of polyorganosiloxane components of the multi-component system. Therefore, the blowing agent is provided as a distinct entity of the multi-component system that is, in particular, not the result of any chemical reaction taking place in the multi-component system. A device for producing the foam and the corresponding negative pressure wound therapy kit are also described.
Claims22
A multi-component system for producing a silicone foam, said system comprising:
- a first component comprising a first polyorganosiloxane, said first polyorganosiloxane comprising at least two silicon-bonded hydrogen atoms;
- a second component comprising a second polyorganosiloxane, said second polyorganosiloxane comprising at least two alkenyl- and/or alkynyl groups, and at least one hydrosilylation catalyst;
- said multi-component system further comprising at least one blowing agent,
- wherein said second polyorganosiloxane has the following general formula, representing a statistical co-polymer
- wherein R1 is selected from monovalent or functionally substituted C4-C12 hydrocarbon group, wherein R2 is selected from monovalent or functionally substituted C1-C12 hydrocarbon group,
- wherein R3 to R10, independently, are selected from monovalent or functionally substituted C1-C3 hydrocarbon groups, and wherein at least one of R3 to R10 is a C2-C3 alkenyl or C2-C3 alkynyl,
- wherein n and m indicate the number of repeating units, and wherein the ratio between the total number of m and n is from 1:100 to 40:100.
Dependencies are inferred from the claim text.