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US 5,717,050 AGranted
Hypoallergenic natural rubber products from parthenium argentatum (gray) and other non-hevea brasiliensis species
AssigneeThe United States of America as represented by the Secretary of Agriculture
InventorKatrinia Cornish
Life of this patent
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Abstract
Hypoallergenic products are made from Parthenum argentatum (Gray), Ficus elastica and other non-hevea rubber-containing plants by homogenizing the plants in an aqueous medium, filtering the homogenate and separating the rubber-containing phase from the aqueous phase by centrifugation. Optionally, the filtrate may be clarified before separation. The hypoallergenic rubber products do not contain the rubber-associated proteins which are responsible for sensitization in allergic individuals.
Claims10
A hypoallergenic rubber product made by the process of
- a) homogenizing rubber-containing plants in aqueous medium, wherein said aqueous medium comprises buffer, pH about 7.0 to about 8.0, an antioxidant, and a compound which will bind phenolic compounds and resins;
- b) filtering the homogenate;
- c) separating the rubber-containing phase from the aqueous phase to produce a product which, when dried, results in a solid sticky product;
- and
- wherein the rubber-containing plants are non-Hevea plants.
2 more elements
Dependencies are inferred from the claim text.