Polyamide hot-melt resin granules loaded with active ingredients
AssigneeAB7 Innovation S.A.S.U.
InventorsRené Chelle, David Nguyen, Arnaud Vilbert
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Abstract
The present document describes a polyamide hot-melt resin having a chemical structure consisting of dimerized fatty acids and diamines, loaded with an active ingredient. The dimerized fatty acids may have 12 to 24 carbons and the diamines may have 2 to 14 carbons. The amine residual functional groups and acid residual functional groups within the polyamide hot-melt resin may have a [NH2]/[COOH] molar ratio below 5, and the active ingredient may be incorporated in quantities of between about 0.01 and about 55% by weight of weight of the resin. The present document also describes items molded from the polyamide hot-melt resins, and processes of preparing the polyamide hot-melt resins.
Claims13
A method for obtaining a composition comprising a polyamide hot-melt resin loaded with a diffusible active ingredient, having a chemical structure consisting of dimerized fatty acids and diamines, the polyamide hot-melt resin being able to diffuse the diffusible active ingredient, the method comprising the steps of:
- (a) heating a polyamide hot-melt resin granule at about 30° C. to about 95° C., to obtain a heated polyamide hot-melt resin granule;
- and
- (b) mixing the diffusible active ingredient with the heated polyamide hot-melt resin granule, to obtain a polyamide hot-melt resin granule loaded with the diffusible active ingredient,
- wherein the dimerized fatty acids have 12 to 24 carbons and the diamines have 2 to 14 carbons, wherein amine residual functional groups and acid residual functional groups within the polyamide hot-melt resin have a [NH2]/[COOH] molar ratio below 5;
- and
- wherein the polyamide hot-melt resin incorporates the active ingredient in quantities from about 0.01% to about 55% by weight of weight of the polyamide hot-melt resin.
Dependencies are inferred from the claim text.