Abstract: A method for the reversible agglomeration of fine particles of plaster of Paris (CaSO4.½H2O) and agglomerates made by the method which comprises agitating the fine particles in the presence of an organic polar liquid preferably nearly dry and having some ability to form hydrogen bonds (especially n-propanol) and then drying off most of the liquid whereby the fine particles spontaneously interlink (possibly by mechanical keying) in a way which allows the interlinks to be disrupted so as to release fine particles when the agglomerates are stirred into water by hand. Also a dry precursor mixture comprising the agglomerates containing conventional auxiliary additives for use in mixing with water to make aqueous compositions for use as filler pastes, casting materials or plaster slurries.

Abstract: The present invention relates to an adhesive kit comprising two packs and a method of manufacture of an adhesive composition therefrom. The kit comprises, in a first pack a water-continuous polymer emulsion and in a second pack a non-alkali activated inverse emulsion of a high molecular weight water soluble synthetic polymer. The method of manufacture of the adhesive requires mixing for short periods with hand stirring. The adhesive composition formed is particularly, but not exclusively useful as an adhesive for hanging wallpaper.