Improvements in or relating to resinous compositions

Abstract

Abstract Polymers in aqueous dispersions are transferred from the water to an organic phase by adding to the dispersion a liquid organic latent solvent plasticiser, mixing until the resin forms a homogeneous mass with the plasticiser and decanting the water. The plasticiser is one which has no effect on the resin at room temperature, but coalesces therewith at elevated temperature. Suitable plasticisers are dibutoxy ethyl phthalate, blown castor oil, polymerized butyl acetyl ricinoleate, glycol esters of aliphatic acids, sebacates, adipates, oleates and organic phosphates. Pigments, stabilizers such as phenoxy propylene oxide, lead silicate and carbonate and anti-foaming agents may also be added. Suitable resins are vinyl chloride polymers and copolymers thereof with alkyl esters of vinylene dicarboxylic acids, particularly diethyl fumarate; vinyl esters, ethers, ketones; acrylic and substituted acrylic acids, their esters and nitriles; ethylenic acids; vinylidene halides; olefins and halogenated olefins; and dienes and halodienes. Transfer of the resin is accelerated by adding an electrolyte such as sodium chloride or by heating. After separation, the paste may be thinned with a non-solvent diluent such as aliphatic hydrocarbons, toluene, xylene and lower aliphatic alcohols. The compositions are useful in coating fabrics, films, metal and wood, the coated article being afterwards heated to gelatinize the resin and to remove the diluent (see Group VIII). Films, sheets and moulded articles may also be prepared from the compositions.

Inventors

No inventors recorded.

Bibliographic Details