초록

Hydromagnesite-magnesium hydroxide compositions which, when used as fillers in smoking article wrappers, significantly reduce the amount of sidestream smoke produced by the burning smoking article while providing the smoking article with good subjective characteristics.

대표청구항 ▼

[ What is claimed is:] [1.] A paper suitable for use as a smoking article wrapper comprising:plant fiber and filler, said filter comprising intergrown hydromagnesite and magnesium hydroxide having a rosette morphology produced by the following process:(1) forming a first solution by one of the follo

[ What is claimed is:] [1.] A paper suitable for use as a smoking article wrapper comprising:plant fiber and filler, said filter comprising intergrown hydromagnesite and magnesium hydroxide having a rosette morphology produced by the following process:(1) forming a first solution by one of the following steps:(i) mixing magnesium hydroxide, magnesium oxide or a combination thereof with water to form a suspension and reacting the suspension with carbon dioxide;(ii) reacting carbon dioxide with an aqueous suspension or solution of at least one magnesium carbonate selected from the group consisting of hydromagnesite, nesquehonite, dypingite, and giorgiosite; or(iii) reacting a magnesium salt with an alkali metal bicarbonate;(2) forming an aqueous basic suspension of magnesium hydroxide;(3) mixing the solution of part (1) and the aqueous basic suspension of part (2); and(4) heating the resulting mixture to form a precipitate.