Foamable formulation and foam
AssigneeGiltech Limited
InventorsTom Gilchrist, Eilidh Trainer
Life of this patent
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Abstract
A process for producing a sterile foam for medical or veterinary use is provided. A physiologically acceptable formulation for application to a body as a foam contains a foamable gelling agent. The formulation is foamed and treated with a precipitant which is calcium citrate or a calcium ion. The precipitant is combined with the foamable gelling agent before or during the foaming of the gelling agent. The foam thus obtained is allowed to cure and is then immersed in a bath of the precipitant. The treated foam is dried and sterilized by exposure to gamma-irradiation or ethylene oxide.
Claims11
A process of producing a sterile foam for medical or veterinary use, said process comprising the following steps:
- a) forming a physiologically acceptable foam for application to a body, said foam comprising a foamable gelling agent, and wherein said gelling agent is treated with a first precipitant which is calcium citrate, calcium-releasing water-soluble glass, or a combination thereof, and wherein said first precipitant is combined with said gelling agent before or during the foaming of the gelling agent and stabilises the gelling agent;
- b) allowing the foam thus obtained to cure;
- c) immersing the cured foam in a bath of a second precipitant which is calcium citrate, calcium-releasing water-soluble glass, or a combination thereof, to form a treated foam;
- d) drying the treated foam;
- and
- e) sterilising said dried treated foam by exposure to gamma-irradiation or ethylene oxide.
Dependencies are inferred from the claim text.