Smoking articles containing polymers of polycarboxylic acid esters
Disclosed is a smoking article containing a rod containing a smokable composition, an optional wrapper for the rod, and at least one polymer or oligomer comprising monomer units of a polycarboxylic acid ester disposed on or in the rod, the wrapper, or both. The polycarboxylic acid ester contains an acid moiety having at least two carboxylic groups, and at least two alcohol moieties independently selected from those corresponding to a cycloalkyl alcohol or an aryl alcohol. The cycloalkyl alcohol or aryl alcohol is a flavorant, or chemesthetic agent, or both. In addition, a method for the controlled release of these flavorant or chemesthetic agents is described, which comprises pyrolyzing at least one polymer or oligomer.
1. A smoking article comprising:
a rod comprising a smokable composition;
an optional wrapper for the rod; and
at least one polymer or oligomer comprising monomer units of a polycarboxylic acid ester disposed on or in the rod, the optional wrapper, or both;
wherein said polycarboxylic acid ester comprises an acid moiety comprising at least two carboxylic groups, and at least two alcohol moieties, which may be the same or different, and are independently selected from those corresponding to a cycloalkyl alcohol or an aryl alcohol, and
wherein said cycloalkyl alcohol or aryl alcohol is a flavorant, or chemesthetic agent, or both.
2. The smoking article of claim 1 , wherein said monomer units comprise one or more diesters of one or more dicarboxylic acids.
3. The smoking article of claim 1 , wherein said at least one polymer or oligomer is dispersed in said smokable composition in said rod.
4. The smoking article of claim 1 , wherein said at least one polymer or oligomer is dispersed in, or printed on, said wrapper for the rod.
5. The smoking article of claim 1 , further comprising a filter, and wherein said at least one polymer or oligomer is dispersed in said filter.
6. The smoking article of claim 1 , wherein said cycloalkyl alcohol or aryl alcohol comprise one or more of menthol, thymol, or eugenol.
7. The smoking article of claim 2 , wherein said acid moiety comprises one or more selected from 1-carboxy-1-carboxymethylethylene, or 1,2-dicarboxyethylene.
8. The smoking article of claim 7 , wherein said monomer units comprise those resulting from free radical polymerization or oligomerization of at least one of dimenthyl itaconate, dimenthyl maleate, or dimenthyl fumarate.
9. The smoking article of claim 8 , wherein said monomer units comprise those resulting from radical polymerization or oligomerization of dimenthyl itaconate.
10. The smoking article of claim 1 , wherein said at least one polymer or oligomer further comprises one or more monomer units different from said monomer units of said polycarboxylic acid ester, and resulting from free radical polymerization or oligomerization of one or more co-monomers.
11. The smoking article of claim 10 , wherein said one or more co-monomers comprises an unsaturated carboxylic acid or ester.
12. The smoking article of claim 11 , wherein said unsaturated carboxylic acid or ester comprises one or more of acrylic acid, methacrylic acid, methyl acrylate, or methyl methacrylate.
13. The smoking article according to claim 1 , wherein the smoking article is a cigarette.
14. The smoking article of claim 13 , wherein the cigarette is a traditional cigarette.
15. The smoking article of claim 13 , wherein the cigarette is an electrically heated cigarette.
16. The smoking article of claim 13 , wherein the cigarette comprises a fuel element in the tobacco rod.
17. The smoking article of claim 1 , wherein the cycloalkyl alcohol or aryl alcohol are linked to the polymeric backbone through a non-carbonate linking group.