PARTICULATE MATERIAL FOR CONTROLLED RELEASE OF ACTIVE INGREDIENTS
The invention relates to a particulate material for controlled release of active ingredients, the particulate material comprising a combination of one or more active ingredients, excluding nicotine, and an inorganic mineral filler, wherein the active ingredient is reversibly absorbed into and/or adsorbed onto the inorganic mineral filler, and wherein the BET specific surface area of the inorganic mineral filler is above 15 m 2 /g, the BET specific surface area measured in accordance with ISO 9277. The invention is particularly advantageous for controlled release of active ingredients.
1 . A particulate material for controlled release of active ingredients, the particulate material comprising a combination of one or more active ingredients, excluding nicotine, and an inorganic mineral filler, wherein the active ingredient is reversibly absorbed into and/or adsorbed onto the inorganic mineral filler, and wherein the BET specific surface area of the inorganic mineral filler is above 15 m 2 /g, the BET specific surface area measured in accordance with ISO 9277.
2 . The particulate material according to claim 1 , wherein the active ingredient is a flavoring agent.
3 . The particulate material according to claim 1 , wherein the inorganic mineral filler comprising a carbonate.
4 . The particulate material according to claim 1 , wherein the average grain diameter of the inorganic mineral filler is between 50 and 0.1 microns.
5 . The particulate material according to claim 1 , wherein the weight of the dried inorganic mineral filler is increased by at least 1% by weight at a relative humidity of 95% at 25 degree Celcius compared to a relative humidity of 0%.
6 . The particulate material according to claim 1 , wherein the powder flow of the particulate material is higher than the powder flow of particulate material with a BET specific surface area of inorganic mineral filler below 15 m 2 /g, the BET specific surface area measured in accordance with ISO 9277.
7 . The particulate material according to claim 1 , wherein the inorganic mineral filler comprises a natural calcium carbonate, such as a marble, a calcite, a chalk or a carbonate containing dolomite; and/or a precipitated calcium carbonate (PCC).
8 . The particulate material according to claim 1 , wherein the inorganic mineral filler is obtainable by pre-treatment with one or more medium-strong to strong sources of H 3 O + ions and/or pre-treatment with an inorganic salt, such as a magnesium sulphate in combination with aluminium sulphate and/or zinc sulphate, and pre-treatment with gaseous CO 2 , and for precipitated calcium carbonate preferably at a CO 2 gas flow rate of below 30 litres per minute at standard temperature and pressure per kilogram calcium hydroxide during precipitation.