Aerosol-generating material comprising an amorphous solid comprising method and calcium-crosslinked alginate

Abstract

An aerosol-generating material including an amorphous solid, the amorphous solid including 0.1-80 wt % of menthol; 1-60 wt % of a gelling agent, the gelling agent having calcium-crosslinked alginate which includes α-(1-4)-linked L-guluronate (G) units; and 0.1-50 wt % of an aerosol-former material; wherein a molar ratio of Ca 2+ cations to G units is from 0.2:1 to 1:1.

1 . An aerosol-generating material comprising an amorphous solid, the amorphous solid comprising:
 0.1-80 wt % of menthol;   1-60 wt % of a gelling agent, the gelling agent comprising calcium-crosslinked alginate which comprises α-(1-4)-linked L-guluronate (G) units; and   0.1-50 wt % of an aerosol-former material;   wherein a molar ratio of Ca 2+  cations to G units is from 0.2:1 to 1:1.   
     
     
         2 . The aerosol-generating material according to  claim 1 , wherein the molar ratio of calcium to G units is from 0.3:1 to 0.5:1. 
     
     
         3 . The aerosol-generating material according to  claim 1 , wherein the calcium-crosslinked alginate also comprises β-(1-4)-linked D-mannuronate acid (M) units. 
     
     
         4 . The aerosol-generating material according to  claim 3 , wherein a molar ratio of G units to M units is from 1:2 to 10:1. 
     
     
         5 . The aerosol-generating material according to  claim 1  wherein, when stored for 30 days in a sealed container under ambient conditions (22° C.; 60% relative humidity; 1013 mbar), the aerosol-generating material contains at least 60% of the menthol by dry weight of the menthol present in the aerosol-generating material before storage. 
     
     
         6 . The aerosol-generating material according to  claim 1 , wherein the amorphous solid comprises the aerosol-former material in an amount of 10-30 wt %. 
     
     
         7 . The aerosol-generating material according to  claim 1 , wherein the amorphous solid comprises the menthol in an amount of 40-60 wt %. 
     
     
         8 . The aerosol-generating material according to  claim 1 , wherein the amorphous solid comprises:
 20-35 wt % of the gelling agent;   15-25 wt % of the aerosol-former material;   45-55 wt % of the menthol;   wherein these weights are calculated on a dry weight basis.   
     
     
         9 . The aerosol-generating material according to  claim 1 , wherein the cross-linked alginate comprised in the gelling agent is present in the amorphous solid in an amount of from about 15-40 wt % of the amorphous solid on a dry weight basis. 
     
     
         10 . The aerosol-generating material according to  claim 1 , wherein the gelling agent further comprises pectin. 
     
     
         11 . The aerosol-generating material according to  claim 10 , wherein a dry weight ratio of the cross-linked alginate to the pectin is from 1:1 to 10:1. 
     
     
         12 . (canceled) 
     
     
         13 . The aerosol-generating material according to  claim 1 , comprising from about 1 wt % to about 15 wt % of water (WWB). 
     
     
         14 . The aerosol-generating material according to  claim 1 , wherein the aerosol-former material is selected from erythritol, propylene glycol, glycerol and mixtures thereof. 
     
     
         15 . A substrate comprising an aerosol-generating material according to  claim 1  and a support on which the aerosol-generating material is provided. 
     
     
         16 . An article for use with a non-combustible aerosol provision device, the article comprising a substrate according to  claim 15 . 
     
     
         17 . A non-combustible aerosol provision system comprising an article according to  claim 16  and a non-combustible aerosol provision device, wherein the non-combustible aerosol provision device is configured to generate aerosol from the article when the article is used with the non-combustible aerosol provision device, and wherein the non-combustible aerosol provision device comprises a heater configured to heat but not burn the article. 
     
     
         18 - 20 . (canceled) 
     
     
         21 . The system according to  claim 17 , wherein the article is provided as a rod. 
     
     
         22 . A method of making an aerosol-generating material according to  claim 1 , the method comprising:
 providing a slurry comprising the gelling agent, aerosol-former material and menthol;   forming a layer of the slurry;   setting the slurry to form a gel; and   drying the gel to form the amorphous solid.   
     
     
         23 . (canceled) 
     
     
         24 . The method according to  claim 22 , wherein the setting the slurry comprises adding a calcium source comprising Ca 2+  cations to the slurry. 
     
     
         25 - 27 . (canceled) 
     
     
         28 . A method of generating an aerosol using a non-combustible aerosol provision system according to  claim 17 , the method comprising heating the aerosol-generating material to a temperature of less than 350° C. such as from about 220° C. to about 280° C. 
     
     
         29 . (canceled) 
     
     
         30 . The method according to  claim 28  wherein, during a session of use, at least 20 wt % of the menthol present in the amorphous solid is aerosolised. 
     
     
         31 . Use of the non-combustible aerosol provision system according to  claim 17 .