| abstract |
An adhesive composition suitable for use as a wallpaper adhesive comprises a mixture of a water-soluble adhesive polymer such as a cellulose derivative or starch and a product (such as a composite of a dry acid and a carbonate or bicarbonate) reactive in the presence of water to release a gas. The mixture which is conveniently in compressed tablet form has a moisture content sufficiently low to prevent significant reaction in the product before immersion of the mixture in water. The dry acid may be citric, sulphamic or tartaric acid. |